WO2019210509A1

WO2019210509A1 - Acknowledgment message sending method and apparatus

Info

Publication number: WO2019210509A1
Application number: PCT/CN2018/085610
Authority: WO
Inventors: 杨力; 蒋成龙; 郑小金; 林捷
Original assignee: 华为技术有限公司
Priority date: 2018-05-04
Filing date: 2018-05-04
Publication date: 2019-11-07

Abstract

Disclosed in the present application are an acknowledgment message sending method and apparatus, belonging to the field of wireless communications. The method is applied to a proxy device, and comprises: receiving an acknowledgment message sent by a terminal; acquiring a first amount of data, a second amount of data and a target amount of data, the first amount of data being a CWND value updated by a server after receiving the acknowledgment message, the second amount of data being the amount of data which has been currently sent by the server but the receipt of which has not been acknowledged by the terminal, the target amount of data being the amount of data that can be stored in a buffer of the proxy device within a target period of the acknowledgment message; if the smallest value of the first amount of data and the AWND value in the acknowledgment message is greater than the sum of the target amount of data and the second amount of data, replacing the AWND value in the acknowledgment message with the sum of the target amount of data and the second amount of data; and sending the acknowledgment message to the server. The present application ensures that data sent by a server would not congest in the buffer of a proxy device, thereby effectively avoiding packet loss, and improving data throughput.

Description

Confirmation message sending method and device

Technical field

The present application relates to the field of wireless communications, and in particular, to a method and an apparatus for transmitting a confirmation message.

Background technique

When the server and the terminal are in wireless communication, the server may send a data packet to the terminal. After receiving the data packet, the terminal may generate an acknowledgement packet corresponding to the data packet and return it to the server. After receiving the acknowledgement packet, the server receives the acknowledgement packet. The number of subsequent data packets can be controlled according to the value of the advertised receive window (AWND) in the acknowledgment message.

At present, the wireless communication between the server and the terminal is implemented by the proxy device. In order to avoid congestion and packet loss on the proxy device side, after receiving the acknowledgement packet sent by the terminal, the proxy device first determines that the cache is currently unoccupied. The amount of data that can be stored, and then determining the smaller one of the AWND value in the acknowledgement message and the maximum amount of data that can be stored in the currently unoccupied space in the cache as a new AWND value, and then reporting the acknowledgement The AWND value in the text is replaced with the new AWND value, and the confirmation message is finally sent to the server.

However, the unoccupied space in the cache of the proxy device changes in real time. Therefore, the above determines the new AWND value based only on the amount of data that can be stored in the cache space of the proxy device that is currently unoccupied, which may result in the determination. The new AWND value is inaccurate, which may cause the data packets sent by the server to be congested in the proxy device's cache, causing buffer overflow packet loss and throughput suppression.

Summary of the invention

The application provides a method and a device for sending a confirmation message, which can solve the problem of buffer overflow packet loss and throughput suppression of the proxy device in the related art. The technical solution is as follows:

In a first aspect, a method for sending a confirmation message is provided, which is applied to a proxy device, and the method includes:

Receiving an acknowledgement message sent by the terminal;

Obtaining a first data quantity, a second data quantity, and a target data quantity, where the first data quantity is a congestion window (CWND) value updated by the server after receiving the confirmation message, and the second data quantity Is the amount of data that the server has sent but has not been acknowledged by the terminal, and the target data amount is the amount of data that can be stored in the cache of the proxy device during the target period of the acknowledgement message;

Determining an AWND value in the confirmation message;

If the minimum value of the first data amount and the AWND value in the acknowledgement message is greater than the sum of the target data amount and the second data amount, replacing the AWND value in the acknowledgement message with a sum of the target data amount and the second data amount;

Sending the confirmation message to the server.

In the embodiment of the present application, since the target data amount is the amount of data that the proxy device can store in the cache of the proxy device in the target period of the acknowledgement message, the AWND in the first data amount and the acknowledgement packet When the minimum value of the value is greater than the sum of the target data amount and the second data amount, the AWND value in the confirmation message is replaced with the sum of the target data amount and the second data amount, which can control the amount of data subsequently sent by the server, and ensure The amount of data sent by the server is not congested in the cache of the proxy device, and the stability of the cache queue is maintained, thereby effectively preventing packet loss and improving data throughput.

It is worth noting that the proxy device can not only forward data between one server and one terminal, but also perform data forwarding between multiple servers and multiple terminals. At this time, if the multiple servers and the multiple terminals The data forwarding used in the proxy device is the same cache, and the server is the server cluster composed of the plurality of servers, and the terminal is the terminal cluster composed of the plurality of terminals, and then the acknowledge packet is passed. The sending method can ensure that data forwarding between the multiple servers and the multiple terminals does not cause congestion and packet loss, so that the data throughput rate between the multiple servers and the multiple terminals can be effectively maintained.

The obtaining the first amount of data includes:

Obtaining the history message confirmation information and the message confirmation information carried in the confirmation message;

Obtaining a congestion control algorithm type configured by the server and a current CWND value of the server;

Obtaining the first data amount according to the historical message confirmation information, the message confirmation information carried in the confirmation message, the type of the congestion control algorithm configured by the server, and the current CWND value of the server.

It should be noted that, according to the historical message confirmation information, the message confirmation information carried in the confirmation message, the type of the congestion control algorithm configured by the server, and the current CWND value of the server, when the first data amount is obtained, the proxy device may firstly use the server according to the server. The type of the congestion control algorithm is configured to determine the congestion control state of the server when the history message confirmation information and the message confirmation information carried in the acknowledgement message are received, and then the current CWND value of the server is performed according to the congestion control state of the server. Update to get the first amount of data.

In the embodiment of the present application, the process of the first data volume is obtained by the proxy device, that is, the proxy device simulates the process of performing congestion control by the server according to the congestion control algorithm type configured by the server and the received packet confirmation information, so that the proxy device can accurately The CWND value updated by the server after receiving the acknowledgement message is predicted.

The obtaining the second amount of data includes:

Obtaining a current send window value of the server;

And subtracting the data volume of the first data packet from the current sending window value of the server, to obtain the second data volume, where the first data packet is sent by the server that is confirmed by the acknowledgement message. Data message.

It should be noted that the sending window value of the server is the total data amount of all data packets that the server has sent and the server has not received the corresponding acknowledgement message.

In addition, when obtaining the current sending window value of the server, the current CWND value of the server and the AWND value of the last acknowledgment message sent by the proxy device to the server may be obtained, and the current CWND value of the server and the AWND value of the previous acknowledgment message are obtained. The smaller of the values is determined as the current send window value of the server.

The obtaining the target data amount includes:

Obtaining a third data amount, a fourth data amount, and a fifth data amount, wherein the third data amount is an amount of data that can be stored in a space that is not occupied in the cache, and the fourth data amount is the proxy device The amount of data that can be sent to the terminal during the target period of the acknowledgement message, the fifth amount of data being the amount of data that the server has currently sent but not yet received by the proxy device;

Adding the third amount of data to the fourth amount of data and subtracting the fifth amount of data to obtain a first value;

An amount of data less than or equal to the first value is determined as the target amount of data.

It should be noted that, when the amount of data less than or equal to the first value is determined as the target data amount, the first value may be determined as the target data amount, or any value smaller than the first value may be determined as the target data amount. This embodiment of the present application does not limit this.

In the embodiment of the present application, the process of determining, by the proxy device, the target data amount, that is, the amount of data that the proxy device refers to the proxy device currently buffering the available space, leaving the proxy device within the target period of the acknowledgement packet, and the amount of data reaching the proxy device. To determine the amount of data that the proxy device can store in the target period of the acknowledgment message, thereby accurately predicting the amount of data that can be stored in the cache of the proxy device during the target period of the acknowledgment message. .

The obtaining the third amount of data includes:

Obtaining a loopback delay between the server and the terminal;

When the loopback delay is greater than a preset time delay, dividing the preset delay by the loopback delay to obtain a second value;

Multiplying the amount of data that can be stored in the cache of the proxy device by the second value to obtain a third value;

Obtaining an amount of data currently stored in a cache of the proxy device;

The third value is subtracted from the amount of data currently stored in the cache of the proxy device to obtain the third amount of data.

It should be noted that the loopback delay between the server and the terminal is the length of time between when the server sends a certain data packet to the terminal and the time when the server receives the acknowledgement packet corresponding to the data packet sent by the terminal. .

The obtaining the fourth data amount includes:

Obtaining an air interface rate of the proxy device;

Obtaining a duration of the target period of the acknowledgement message;

The fourth data amount is obtained by multiplying the air interface rate by the duration of the target period of the acknowledgement message.

It should be noted that the air interface rate of the proxy device is the amount of data that the downlink air interface of the proxy device can transmit in a unit time.

In addition, the target period of the acknowledgement message is a period of time between when the proxy device sends the acknowledgement packet to the server and when the first data packet sent by the server after receiving the acknowledgement packet is received by the proxy device. .

The duration of the target period for obtaining the acknowledgement packet includes:

Obtaining a historical target period duration, where the duration of the historical target period is a duration between the first time and the second time of the historical confirmation message, where the first time is that the proxy device sends the history confirmation to the server The time of the message, the second time is a time when the first data message sent by the server after receiving the history confirmation message is received by the proxy device;

Determining a duration of the target period of the acknowledgement message according to the historical target period duration.

It should be noted that, when determining the duration of the target period of the acknowledgement message according to the historical target period duration, the weighted average of the history target period duration may be determined as the duration of the target period of the acknowledgement message.

The obtaining the fifth data amount includes:

Acquiring a current sending window value and a sixth data amount of the server, where the sixth data amount is the amount of data sent by the server after receiving the second data packet sent by the server by the proxy device The second data packet is a data packet sent by the server that is confirmed by the last acknowledgement message sent by the proxy device to the server;

Subtracting the sixth data amount from the current transmission window value of the server to obtain the fifth data amount.

It is worth noting that the server can actively inform the proxy device of the amount of data that the server has currently sent, or the proxy device can start tracking and estimating the amount of data that the server has sent when the server establishes a wireless connection with the terminal. In this case, when the proxy device acquires the fifth data volume, it may first obtain the amount of data that the server has currently sent, determine the amount of data sent by the server that the proxy device has received, and then the amount of data that the server has currently sent. The amount of data sent by the server that the proxy device has received has been subtracted to obtain a fifth amount of data.

In a second aspect, there is provided a acknowledgment message transmitting apparatus, the acknowledgment message transmitting apparatus having a function of implementing the behavior of the acknowledgment message transmitting method in the first aspect. The acknowledgment message sending device includes at least one module, and the at least one module is configured to implement the acknowledgment message sending method provided by the foregoing first aspect.

According to a third aspect, there is provided a acknowledgment message transmitting apparatus, the acknowledgment message transmitting apparatus comprising a processor and a memory, wherein the memory is used for storing a support acknowledgment message transmitting apparatus to perform the foregoing first aspect A program for confirming a message transmission method, and storing data related to the method for transmitting the confirmation message described in the first aspect above. The processor is configured to execute a program stored in the memory. The acknowledgment message transmitting apparatus may further include a communication bus for establishing a connection between the processor and the memory.

In a fourth aspect, a computer readable storage medium is provided, the instructions being stored in the computer readable storage medium, when executed on a computer, causing the computer to perform the method of transmitting the confirmation message described in the first aspect above.

In a fifth aspect, a computer program product comprising instructions for causing a computer to perform the method of transmitting a confirmation message as described in the first aspect above when provided on a computer.

The technical effects obtained by the second aspect, the third aspect, the fourth aspect, and the fifth aspect are similar to those obtained by the corresponding technical means in the first aspect, and are not described herein again.

The beneficial effects brought by the technical solutions provided by the present application include at least:

After receiving the acknowledgement packet sent by the terminal, the first data volume, the second data volume, and the target data volume are obtained. The first data volume is a CWND value updated by the server after receiving the acknowledgement packet, where the second data volume is the current server. The amount of data that has been transmitted but not yet acknowledged by the terminal, the amount of data being the amount of data that can be stored in the cache of the proxy device during the target period of the acknowledgement message. After that, the AWND value in the confirmation message is determined. If the first data amount and the minimum value of the AWND value in the acknowledgement message are greater than the sum of the target data amount and the second data amount, first replacing the AWND value in the acknowledgement message with the target data amount and the second data. The sum of the quantities is sent to the server. Since the target data amount is the amount of data that the proxy device can store in the buffer of the proxy device during the target period of the acknowledgement message, the minimum value in the first data amount and the AWND value in the acknowledgement packet is greater than the target. When the sum of the data amount and the second data amount, the AWND value in the confirmation message is replaced by the sum of the target data amount and the second data amount, which can control the amount of data sent by the server and ensure that the amount of data sent by the server is Congestion does not occur in the cache of the proxy device, and the stability of the cache queue is maintained, thereby effectively preventing packet loss and improving data throughput.

DRAWINGS

1 is a schematic structural diagram of an implementation environment provided by an embodiment of the present application;

2 is a schematic structural diagram of a computer device according to an embodiment of the present application;

3 is a flowchart of a method for sending a confirmation message according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of an apparatus for sending a confirmation message according to an embodiment of the present application.

detailed description

In order to make the objects, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

Before explaining the embodiments of the present application in detail, the implementation environment involved in the embodiments of the present application will be described.

FIG. 1 is a schematic structural diagram of an implementation environment provided by an embodiment of the present application. Referring to FIG. 1, the implementation environment may include a terminal 101, a proxy device 102, and a server 103.

The terminal 101 and the proxy device 102 can be wirelessly connected, and the proxy device 102 and the server 103 can also be wirelessly connected. The wireless connection can be a Transmission Control Protocol (TCP) connection or the like.

The server 103 can send the data message to the proxy device 102. After receiving the data packet, the proxy device 102 can send the data packet to the terminal 101. After receiving the data packet, the terminal 101 may generate an acknowledgement packet corresponding to the data packet, and send the acknowledgement packet to the proxy device 102. After receiving the acknowledgement packet, the proxy device 102 may send the acknowledgement packet to the server 103.

The proxy device 102 can be a TCP transparent proxy, etc., and the proxy device 102 can be set in a base station (such as an eNodeB, etc.), a core network gateway (such as a packet gateway UGW, etc.), a fixed network gateway, and the like, in a radio access network (Radio). In the Access Network, RAN), the proxy device 102 can also be placed in a centralized unit (CU) of the RAN. The proxy device 102 can implement the acknowledgement packet sending method provided in the embodiment of FIG. 3 below through the board of the Packet Data Convergence Protocol (PDCP) layer.

FIG. 2 is a schematic structural diagram of a computer device according to an embodiment of the present application. The computer device may be the proxy device 102 shown in FIG. 1. Referring to FIG. 2, the computer device includes at least one processor 201, a communication bus 202, a memory 203, and at least one communication interface 204.

The processor 201 can be a general purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more for controlling the execution of the program of the present application. integrated circuit.

Communication bus 202 can include a path for communicating information between the components described above.

The memory 203 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type that can store information and instructions. The dynamic storage device can also be an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical disc storage, and a disc storage device. (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be Any other medium accessed, but is not limited to this. Memory 203 may be present independently and coupled to processor 201 via communication bus 202. The memory 203 can also be integrated with the processor 201.

The communication interface 204 uses a device such as any transceiver for communicating with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), etc. .

In a particular implementation, as an embodiment, processor 201 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG.

In a particular implementation, as an embodiment, a computer device can include multiple processors, such as processor 201 and processor 205 shown in FIG. Each of these processors can be a single core processor (CPU) or a multi-core processor (multi-CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data, such as computer program instructions.

The memory 203 is configured to store the program code 210 for executing the solution of the present application, and the processor 201 is configured to execute the program code 210 stored in the memory 203. The computer device can implement the acknowledgement message sending method provided in the embodiment of FIG. 3 below by using the processor 201 and the program code 210 in the memory 203.

FIG. 3 is a flowchart of a method for sending a confirmation message according to an embodiment of the present application, where the method is applied to a proxy device. Referring to Figure 3, the method includes:

Step 301: Receive an acknowledgement message sent by the terminal.

It should be noted that the acknowledgement message may be an acknowledgement (ACK) message or the like. The acknowledgement message is used to confirm that the first data packet sent by the server has been received, that is, the first data packet is the data packet sent by the server that is confirmed by the acknowledgement packet, in other words, the terminal receives the server. After the first data packet sent by the proxy device, the acknowledgement packet corresponding to the first data packet may be generated and sent to the proxy device.

In addition, the acknowledgment message may carry the message acknowledgment information, and the message acknowledgment information carried in the acknowledgment message is used to indicate the last data packets received by the terminal in sequence when the acknowledgment message is sent, and the last few The data packet is the first data packet acknowledged by the acknowledgement message.

Step 302: Acquire a first data amount, a second data amount, and a target data amount.

It should be noted that the first data amount is a CWND value updated by the server after receiving the acknowledgement message, and the second data volume is the amount of data that the server has sent but has not been acknowledged by the terminal, and the target data volume is in the The amount of data that can be stored in the cache of the proxy device during the target period of the acknowledgement message.

The operation of obtaining the first data amount may be: obtaining the history message confirmation information and the message confirmation information carried in the confirmation message; obtaining the congestion control algorithm type configured by the server and the current CWND value of the server; and confirming according to the historical message The information, the message confirmation information carried in the confirmation message, the congestion control algorithm type configured by the server, and the current CWND value of the server acquire the first data amount.

It should be noted that the historical message confirmation information is the message confirmation information carried in the confirmation message that the proxy device has sent to the server, and the historical message confirmation information may be stored in a confirmation information list. The proxy device may update the historical message confirmation information. If the proxy device sends an acknowledgement packet to the server, the packet acknowledgement information carried in the acknowledgement packet may be added to the history packet acknowledgement information, and the proxy After receiving the first data packet sent by the server after receiving the acknowledgement packet, the device may delete the packet acknowledgement information carried in the acknowledgement packet from the history packet acknowledgement information.

In addition, the type of congestion control algorithm configured by the server may indicate the principle of the congestion control algorithm of the server. For example, the type of congestion control algorithm configured by the server may be TCP-Tahoe, TCP-Reno, TCP-Cubic, Compoud-TCP, and the like. The CWND value of the server is a manually introduced variable, used for congestion control, and can be updated according to the status of sending and receiving data packets.

Moreover, when obtaining the congestion control algorithm type configured by the server and the current CWND value of the server, the server may actively notify the proxy device, or the proxy device may establish a wireless connection between the server and the terminal (such as performing TCP networking). The tracking and estimation are started, and the embodiment of the present application does not limit this.

The agent device may first perform congestion according to the server configuration according to the historical message confirmation information, the message confirmation information carried in the confirmation message, the type of the congestion control algorithm configured by the server, and the current CWND value of the server. Controlling the type of the algorithm, determining the congestion control state of the server when the historical message confirmation information and the message confirmation information carried by the confirmation message are received, and then updating the current CWND value of the server according to the congestion control state of the server, The first amount of data.

It is worth noting that the process of the first data volume is obtained by the proxy device, that is, the proxy device simulates the process of the server performing congestion control according to the type of the congestion control algorithm configured by the server and the received packet acknowledgement information, so that the proxy device can accurately predict the process. The CWND value that the server updates after receiving the confirmation message.

The operation of obtaining the second data amount may be: obtaining the current sending window value of the server; and subtracting the data amount of the first data packet from the current sending window value of the server to obtain the second data amount.

The server may actively notify the proxy device when obtaining the current sending window value of the server; or, the proxy device may obtain the current CWND value of the server and the AWND value in the last acknowledgement packet sent by the proxy device to the server, according to The current CWND value of the server and the AWND value in the last acknowledgement message sent by the proxy device to the server determine the current send window value of the server.

It should be noted that the AWND value in an acknowledgement packet is the amount of data that the terminal can store in the available space when the acknowledgement packet is sent. For example, the AWND value in the last acknowledgement packet sent by the proxy device to the server is The amount of data that the terminal can store when the last acknowledgment message is sent.

In addition, the last acknowledgement message is used to confirm that the second data packet sent by the server has been received, that is, the second data packet is the data packet sent by the server that is confirmed by the previous acknowledgement message, and the sentence is replaced. In other words, after receiving the second data packet sent by the server through the proxy device, the terminal may generate the previous acknowledgement packet corresponding to the second data packet to send to the proxy device.

Furthermore, according to the current CWND value of the server and the AWND value in the last acknowledgement message sent by the proxy device to the server, when determining the current sending window value of the server, the current CWND value of the server and the previous acknowledgement message may be used. The smaller of the AWND values is determined to be the server's current send window value.

The operation of obtaining the target data amount may be: acquiring the third data amount, the fourth data amount, and the fifth data amount; adding the third data amount to the fourth data amount and subtracting the fifth data amount to obtain the first value. The amount of data less than or equal to the first value is determined as the target amount of data.

It should be noted that the third data amount is the amount of data that can be stored in the current unoccupied space in the cache of the proxy device, and the fourth data amount is the amount of data that the proxy device can send to the terminal in the target period of the acknowledgement packet. The fifth data amount is the amount of data that the server has currently sent but the proxy device has not received.

In addition, when the amount of data less than or equal to the first value is determined as the target data amount, the first value may be determined as the target data amount, or any value smaller than the first value may be determined as the target data amount, which is implemented by the present application. This example does not limit this.

It is worth noting that the process of determining the target data amount by the proxy device is that the proxy device refers to the current cache space of the proxy device, the amount of data leaving the proxy device within the target period of the acknowledgement message, and the amount of data reaching the proxy device. The process of determining the amount of data that the proxy device can store in the target period of the acknowledgment message, thereby accurately predicting the amount of data that can be stored in the cache of the proxy device during the target period of the acknowledgment message.

Wherein, when the third data amount is acquired, the amount of data that can be stored in the cache that is not occupied in the cache of the proxy device can be determined as the third data amount. Alternatively, the loopback delay between the server and the terminal may be obtained; when the loopback delay is less than or equal to the preset delay, the maximum amount of data that can be stored in the cached space of the proxy device is determined as The third data amount; when the loopback delay is greater than the preset delay, the preset delay is divided by the loopback delay to obtain a second value, and the maximum amount of data that can be stored in the proxy device's cache is multiplied by The second value obtains the third value, obtains the amount of data currently stored in the cache of the proxy device, and subtracts the amount of data currently stored in the cache of the proxy device from the third value to obtain a third amount of data.

In addition, the preset delay may be set in advance, for example, the preset delay may be set according to the service requirement, which is not limited by the embodiment of the present application.

The time of obtaining the fourth data volume, the air interface rate of the proxy device is obtained, the duration of the target period of the acknowledgement packet is obtained, and the air interface rate of the proxy device is multiplied by the duration of the target period of the acknowledgement packet to obtain the fourth data. the amount.

When the duration of the target period of the acknowledgement packet is obtained, the duration of the history target period may be acquired first, and then the duration of the target period of the acknowledgement packet is determined according to the duration of the historical target period.

It should be noted that the duration of the historical target period is the length of time between the first time and the second time of the historical confirmation message, and the historical confirmation message is the confirmation message that the proxy device has sent to the server, and the history confirmation message is the first. The time when the proxy device sends the history confirmation packet to the server, and the second time of the history confirmation packet is the time when the first data packet sent by the server after receiving the history confirmation packet is received by the proxy device.

In addition, the server may update the historical target period duration. If the proxy device sends an acknowledgement packet to the server, the time for sending the acknowledgement packet may be recorded as the first time, and then, when the receiving server receives the acknowledgement, When the first data message sent after the message is confirmed, the time when the first data message is received is recorded as the second time, and the length of time between the recorded first time and the second time is determined as this. The duration of the target period of the acknowledgement message is added to the duration of the historical target period.

Furthermore, when determining the duration of the target period of the acknowledgement message according to the historical target period duration, the weighted average of the history target period duration may be determined as the duration of the target period of the acknowledgement message.

When the fifth data amount is acquired, the current sending window value and the sixth data amount of the server may be obtained, and the current data sending window value of the server is subtracted from the sixth data amount to obtain a fifth data amount.

It should be noted that the operation of obtaining the current sending window value of the server is the same as the operation of obtaining the current sending window value of the server.

In addition, the sixth data amount is the amount of data sent by the server that is received by the proxy device after receiving the second data packet sent by the server.

Step 303: Determine an AWND value in the confirmation message.

Step 304: If the first data amount and the minimum value of the AWND values in the acknowledgement message are greater than the sum of the target data amount and the second data amount, the AWND value in the acknowledgement message is replaced with the target data amount.

Since the target data amount is the amount of data that the proxy device can store in the cache of the proxy device during the target period of the acknowledgement message, when the first data amount and the minimum value of the AWND value in the acknowledgement packet are larger than the target When the sum of the data amount and the second data amount, in order to avoid buffer overflow of the proxy device, the AWND value in the acknowledgement message may be replaced with the sum of the target data amount and the second data amount to control the amount of data subsequently sent by the server. To ensure that the amount of data sent by the server is not congested in the cache of the proxy device, and the stability of the cache queue is maintained, thereby effectively avoiding packet loss and improving data throughput.

Further, if the first data amount and the minimum value of the AWND values in the acknowledgement message are less than or equal to the sum of the target data amount and the second data amount, the AWND value in the acknowledgement message is not modified.

Step 305: Send the confirmation message to the server.

After receiving the acknowledgement packet, the server may first update the CWND value, and then determine the sending window value according to the updated CWND value and the AWND value in the acknowledgement packet, specifically, the updated CWND value and the acknowledgement report. The smaller one of the AWND values in the text is used as the sending window value. At this time, the sending window value does not exceed the sum of the target data amount and the second data amount, thereby ensuring the amount of data sent by the server according to the sending window value. Congestion and packet loss do not occur in the cache of the proxy device, so that the data throughput rate can be effectively maintained.

It is worth noting that the proxy device can not only forward data between one server and one terminal, but also perform data forwarding between multiple servers and multiple terminals. At this time, if the multiple servers and the multiple terminals The server used in the proxy device is the same cache, and the server described in the foregoing steps 301-305 is a server cluster composed of the plurality of servers, and the terminal is composed of the multiple terminals. The terminal cluster, and then the operations of the steps 301-305, can ensure that the data forwarding between the multiple servers and the multiple terminals does not cause congestion and packet loss, thereby effectively maintaining the multiple servers and the multiple terminals. The data throughput rate is stable.

In the embodiment of the present application, after receiving the acknowledgement packet sent by the terminal, the first data volume, the second data volume, and the target data volume are obtained, where the first data volume is a CWND value updated by the server after receiving the acknowledgement packet. The second amount of data is the amount of data that the server has currently sent but has not yet received confirmation by the terminal, and the target amount of data is the amount of data that can be stored in the cache of the proxy device during the target period of the acknowledgement message. After that, the AWND value in the confirmation message is determined. If the first data amount and the minimum value of the AWND value in the acknowledgement message are greater than the sum of the target data amount and the second data amount, first replacing the AWND value in the acknowledgement message with the target data amount and the second data. The sum of the quantities is sent to the server. Since the target data amount is the amount of data that the proxy device can store in the buffer of the proxy device during the target period of the acknowledgement message, the minimum value in the first data amount and the AWND value in the acknowledgement packet is greater than the target. When the sum of the data amount and the second data amount, the AWND value in the confirmation message is replaced by the sum of the target data amount and the second data amount, which can control the amount of data sent by the server and ensure that the amount of data sent by the server is Congestion does not occur in the cache of the proxy device, and the stability of the cache queue is maintained, thereby effectively preventing packet loss and improving data throughput.

4 is a schematic structural diagram of an apparatus for transmitting a confirmation message according to an embodiment of the present application. The apparatus for transmitting an acknowledgement message may be implemented as part or all of a computer device by software, hardware, or a combination of the two. The computer device may be The computer device shown in Figure 2. Referring to FIG. 4, the apparatus includes a receiving module 401, an obtaining module 402, a determining module 403, a replacing module 404, and a transmitting module 405.

The receiving module 401 is configured to perform step 301 in the embodiment of FIG. 3;

The obtaining module 402 is configured to perform step 302 in the embodiment of FIG. 3;

a determining module 403, configured to perform step 303 in the embodiment of FIG. 3;

a replacement module 404, configured to perform step 304 in the embodiment of FIG. 3;

The sending module 405 is configured to perform step 305 in the embodiment of FIG. 3.

Optionally, the obtaining module 402 includes:

The first obtaining unit is configured to obtain the historical message confirmation information and the acknowledgement information carried in the confirmation message;

a second acquiring unit, configured to acquire a congestion control algorithm type configured by the server and a current CWND value of the server;

The third obtaining unit is configured to obtain the first data amount according to the historical message confirmation information, the acknowledgement message information carried in the confirmation packet, the type of the congestion control algorithm configured by the server, and the current CWND value of the server.

Optionally, the obtaining module 402 includes:

a fourth obtaining unit, configured to acquire a current sending window value of the server;

The first calculating unit is configured to subtract the data amount of the first data packet from the current sending window value of the server to obtain a second data quantity, where the first data packet is a datagram sent by the server confirmed by the confirmation message. Text.

Optionally, the obtaining module 402 includes:

a fifth acquiring unit, configured to acquire a third data quantity, a fourth data quantity, and a fifth data quantity, where the third data quantity is a data quantity that can be stored in a space that is not occupied in the cache, and the fourth data quantity is that the proxy device is The amount of data that can be sent to the terminal within the target period of the message, and the fifth amount of data is the amount of data that the server has currently sent but that has not been received by the proxy device;

a second calculating unit, configured to add a third data amount to the fourth data amount and subtract the fifth data amount to obtain a first value;

a determining unit configured to determine an amount of data less than or equal to the first value as the target amount of data.

Optionally, the fifth obtaining unit is configured to:

Obtain the loopback delay between the server and the terminal;

When the loopback delay is greater than the preset delay, the preset delay is divided by the loopback delay to obtain the second value.

Multiplying the maximum amount of data that can be stored in the cache of the proxy device by the second value to obtain a third value;

Obtaining the amount of data currently stored in the cache of the proxy device;

The third value is subtracted from the amount of data currently stored in the cache of the proxy device to obtain a third amount of data.

Optionally, the fifth obtaining unit is configured to:

Obtain the air interface rate of the proxy device;

The length of time to obtain the target period of the acknowledgement message;

Optionally, the fifth obtaining unit is configured to:

The duration of the historical target period is obtained. The duration of the historical target period is the length of time between the first time and the second time of the historical confirmation packet. The first time is the time when the proxy device sends the history confirmation packet to the server, and the second time is the server. The time when the first data packet sent after receiving the history confirmation message is received by the proxy device;

Determine the duration of the target period of the acknowledgement message based on the historical target period duration.

Optionally, the fifth obtaining unit is configured to:

Obtaining a current sending window value and a sixth data amount of the server, where the sixth data volume is the amount of data sent by the server received by the proxy device after receiving the second data packet sent by the server, and the second data packet is the proxy device direction The last acknowledgement message sent by the server confirms the received data packet sent by the server;

The sixth data amount is subtracted from the current transmission window value of the server to obtain a fifth data amount.

It should be noted that the acknowledgment message sending apparatus provided by the foregoing embodiment only exemplifies the division of the foregoing functional modules when acknowledging the message transmission. In actual applications, the functions may be assigned different functions as needed. The module is completed, dividing the internal structure of the device into different functional modules to perform all or part of the functions described above. In addition, the acknowledgment message sending apparatus and the acknowledgment message sending method embodiment provided by the foregoing embodiments are in the same concept, and the specific implementation process is described in detail in the method embodiment, and details are not described herein again.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital versatile disc (DVD)), or a semiconductor medium (for example, a solid state disk (SSD)). )Wait.

The above description of the embodiments of the present application is not intended to limit the application, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present application are included in the scope of the present application. Inside.

Claims

A method for sending a confirmation message, which is characterized in that it is applied to a proxy device, and the method includes:

Receiving an acknowledgement message sent by the terminal;

Obtaining a first data quantity, a second data quantity, and a target data quantity, where the first data quantity is a congestion window CWND value updated by the server after receiving the confirmation message, where the second data quantity is current by the server The amount of data that has been sent but not yet acknowledged by the terminal, the target amount of data being the amount of data that can be stored in the cache of the proxy device during the target period of the acknowledgement message;

Determining a receiving notification window AWND value in the confirmation message;

If the minimum value of the first data amount and the AWND value in the acknowledgement message is greater than the sum of the target data amount and the second data amount, replacing the AWND value in the acknowledgement message with a sum of the target data amount and the second data amount;

Sending the confirmation message to the server.
The method of claim 1, wherein the obtaining the first amount of data comprises:

Obtaining the history message confirmation information and the message confirmation information carried in the confirmation message;

Obtaining a congestion control algorithm type configured by the server and a current CWND value of the server;

Obtaining the first data amount according to the historical message confirmation information, the message confirmation information carried in the confirmation message, the type of the congestion control algorithm configured by the server, and the current CWND value of the server.
The method of claim 1, wherein the obtaining the second amount of data comprises:

Obtaining a current send window value of the server;

And subtracting the data volume of the first data packet from the current sending window value of the server, to obtain the second data volume, where the first data packet is sent by the server that is confirmed by the acknowledgement message. Data message.
The method of any of claims 1-3, wherein the obtaining the target data amount comprises:

Obtaining a third data amount, a fourth data amount, and a fifth data amount, wherein the third data amount is an amount of data that can be stored in a space that is not occupied in the cache, and the fourth data amount is the proxy device The amount of data that can be sent to the terminal during the target period of the acknowledgement message, the fifth amount of data being the amount of data that the server has currently sent but not yet received by the proxy device;

Adding the third amount of data to the fourth amount of data and subtracting the fifth amount of data to obtain a first value;

An amount of data less than or equal to the first value is determined as the target amount of data.
The method of claim 4, wherein the obtaining the third amount of data comprises:

Obtaining a loopback delay between the server and the terminal;

When the loopback delay is greater than a preset time delay, dividing the preset delay by the loopback delay to obtain a second value;

Multiplying the amount of data that can be stored in the cache of the proxy device by the second value to obtain a third value;

Obtaining an amount of data currently stored in a cache of the proxy device;

The third value is subtracted from the amount of data currently stored in the cache of the proxy device to obtain the third amount of data.
The method of claim 4, wherein the obtaining the fourth amount of data comprises:

Obtaining an air interface rate of the proxy device;

Obtaining a duration of the target period of the acknowledgement message;

The fourth data amount is obtained by multiplying the air interface rate by the duration of the target period of the acknowledgement message.
The method according to claim 6, wherein the obtaining the duration of the target period of the acknowledgement message comprises:

Obtaining a historical target period duration, where the duration of the historical target period is a duration between the first time and the second time of the historical confirmation message, where the first time is that the proxy device sends the history confirmation to the server The time of the message, the second time is a time when the first data message sent by the server after receiving the history confirmation message is received by the proxy device;

Determining a duration of the target period of the acknowledgement message according to the historical target period duration.
The method of claim 4, wherein the obtaining the fifth amount of data comprises:

Acquiring a current sending window value and a sixth data amount of the server, where the sixth data amount is the amount of data sent by the server after receiving the second data packet sent by the server by the proxy device The second data packet is a data packet sent by the server that is confirmed by the last acknowledgement message sent by the proxy device to the server;

Subtracting the sixth data amount from the current transmission window value of the server to obtain the fifth data amount.
An acknowledgement message sending device is characterized in that it is applied to a proxy device, and the device includes:

a receiving module, configured to receive an acknowledgement packet sent by the terminal;

An acquiring module, configured to acquire a first data amount, a second data amount, and a target data amount, where the first data quantity is a congestion window CWND value updated by the server after receiving the confirmation message, and the second data quantity Is the amount of data that the server has sent but has not been acknowledged by the terminal, and the target data amount is the amount of data that can be stored in the cache of the proxy device during the target period of the acknowledgement message;

a determining module, configured to determine a receiving notification window AWND value in the confirmation message;

a replacement module, configured to: if the minimum value of the first data amount and the AWND value in the acknowledgement message is greater than a sum of the target data amount and the second data amount, The AWND value is replaced by the sum of the target data amount and the second data amount;

And a sending module, configured to send the acknowledgement message to the server.
The device of claim 9, wherein the obtaining module comprises:

a first obtaining unit, configured to obtain historical message confirmation information and message acknowledgement information carried in the acknowledgement message;

a second acquiring unit, configured to acquire a congestion control algorithm type configured by the server and a current CWND value of the server;

a third acquiring unit, configured to acquire the first data according to the historical message confirmation information, the message confirmation information carried in the confirmation message, the type of the congestion control algorithm configured by the server, and the current CWND value of the server. the amount.
The device of claim 9, wherein the obtaining module comprises:

a fourth obtaining unit, configured to acquire a current sending window value of the server;

a first calculating unit, configured to subtract a data amount of the first data packet from a current sending window value of the server, to obtain the second data amount, where the first data packet is confirmed by the acknowledgement message The received data message sent by the server.
The device according to any one of claims 9-11, wherein the obtaining module comprises:

a fifth acquiring unit, configured to acquire a third data amount, a fourth data amount, and a fifth data amount, where the third data amount is an amount of data that can be stored in a space that is not occupied in the cache, the fourth The amount of data is the amount of data that the proxy device can send to the terminal during the target period of the acknowledgement message, and the fifth amount of data is data that the server has currently sent but the proxy device has not received yet. the amount;

a second calculating unit, configured to add the third data amount to the fourth data amount and subtract the fifth data amount to obtain a first value;

a determining unit configured to determine an amount of data less than or equal to the first value as the target amount of data.
The apparatus according to claim 12, wherein said fifth obtaining unit is configured to:

Obtaining a loopback delay between the server and the terminal;

When the loopback delay is greater than a preset time delay, dividing the preset delay by the loopback delay to obtain a second value;

Multiplying the amount of data that can be stored in the cache of the proxy device by the second value to obtain a third value;

Obtaining an amount of data currently stored in a cache of the proxy device;

The third value is subtracted from the amount of data currently stored in the cache of the proxy device to obtain the third amount of data.
The apparatus according to claim 12, wherein said fifth obtaining unit is configured to:

Obtaining an air interface rate of the proxy device;

Obtaining a duration of the target period of the acknowledgement message;

The fourth data amount is obtained by multiplying the air interface rate by the duration of the target period of the acknowledgement message.
The apparatus according to claim 14, wherein said fifth obtaining unit is configured to:

Obtaining a historical target period duration, where the duration of the historical target period is a duration between the first time and the second time of the historical confirmation message, where the first time is that the proxy device sends the history confirmation to the server The time of the message, the second time is a time when the first data message sent by the server after receiving the history confirmation message is received by the proxy device;

Determining a duration of the target period of the acknowledgement message according to the historical target period duration.
The method of claim 12, wherein the fifth obtaining unit is configured to:

Acquiring a current sending window value and a sixth data amount of the server, where the sixth data amount is the amount of data sent by the server after receiving the second data packet sent by the server by the proxy device The second data packet is a data packet sent by the server that is confirmed by the last acknowledgement message sent by the proxy device to the server;

Subtracting the sixth data amount from the current transmission window value of the server to obtain the fifth data amount.