CN104065464A - A method and device for adjusting the initial window size of a TCP connection - Google Patents

Abstract

The embodiment of the invention provides a method and a device used for adjusting the size of an initial window of TCP connection. According to the network bandwidth corresponding to the network access mode of a core network, the size of the initial window of TCP connection of a TCP proxy device is confirmed, so that the TCP proxy device can carry out data transmission according to the size of the initial window. For different network access modes, the size of the initial window of TCP connection of the TCP proxy device is set. The size of the initial window of TCP connection is flexibly connected. The size of the initial window of TCP connection can match the network access mode. The transmission speed and the bandwidth utilization of TCP connection are further improved.

Description

A method and device for adjusting the initial window size of a TCP connection

technical field

The present invention relates to the communication field, in particular to a method and a device for adjusting the initial window size of a Transmission Control Protocol (Transmission Control Protocol, TCP) connection.

Background technique

With the continuous development of the second-generation mobile communication (2Generation, 2G)/third-generation mobile communication (3Generation, 3G)/long-term evolution (Long Term Evolution, LTE)/wireless local area network (Wireless Local Area Network, WLAN) network, wireless access The incoming bandwidth is getting higher and higher. With the development and popularization of smart terminals, the types of services based on the TCP protocol are more diverse, not only the traditional web browsing services, but also online video, file download and other services, and the number and size of browsing elements have increased significantly. At the same time, mainstream browsers support concurrent TCP connections. All of the above factors require TCP connections to improve efficiency. At the same time, using TCP connections to carry real-time media through firewalls requires real-time performance. Therefore, it is urgent to improve the transmission speed and bandwidth utilization of TCP connections.

The existing solution proposes that the transmission speed and bandwidth utilization rate of the TCP connection can be improved by adjusting the size of the initial window of the TCP connection. The initial window can be understood as including an initial receiving window and an initial sending window. Currently, the following two methods of adjusting the initial window size of a TCP connection are included:

The first is to adjust the initial window size of the TCP connection on the server.

In this method, add the ip route command at the server (server) through the Internet protocol route (ip route), modify the initial sending window size (initcwnd value), and establish a socket (socket) after the three-way handshake connection is established , call the metric function to adopt the new sending window size (cwnd value).

After the client and server establish a TCP connection, the initial sending window size = min{congestion window size, notification window size}. And the size of the initial sending window generally depends on the size of the congestion window. In this method, the specific formula is: initcwnd=min{10*MSS, max(2*MSS, 14600)}.

Therefore, in this method, the size of the initial sending window can be increased to about 15 KB according to the MSS value determined by the Path MTU, which is about 10 segments (segments).

The second is to adjust the initial window size of the TCP connection on the proxy device.

This method is implemented on the agent device. The proxy device is deployed between the client (Client) and the server, and maintains two TCP connections with the client and the server respectively. Add the ip route command at the proxy device, modify the initial sending window size (initcwnd value) and the initial receiving window size (initrwnd value), establish the socket after the three-way handshake connection is established, and call the metric function to adopt the new sending window size (cwnd value) and receive window size (rwnd value).

In this method, the initial window size (initcwnd value and initrwnd value) increases according to the MSS value determined by the Path MTU, and the specific increased value can be set by yourself.

Based on the above description, the first method is implemented on the server side and modifies the initial sending window size of the server. Therefore, it is only suitable for improving the transmission speed and bandwidth utilization of the downlink TCP connection (the TCP connection from the server to the client) for downlink acceleration. .

The second method is implemented on the proxy device between the client and the server. Modifying the initial sending window and initial receiving window of the proxy device can not only perform downlink acceleration, but also uplink acceleration. However, in the second method, a fixed initial sending window or initial receiving window size is used for all network access methods. Therefore, the improvement of the transmission speed and bandwidth utilization of the TCP connection is still limited, and the TCP connection cannot be effectively improved. transmission speed and bandwidth utilization.

Contents of the invention

Embodiments of the present invention provide a method and device for adjusting the initial window size of a TCP connection, so as to further improve the transmission speed and bandwidth utilization rate of the TCP connection.

A method for adjusting the initial window size of a Transmission Control Protocol TCP connection, the method comprising:

Determine the network access mode of the core network;

determining the network bandwidth corresponding to the network access mode of the core network;

Determine the initial window size of the TCP connection according to the network bandwidth, wherein the larger the network bandwidth, the larger the determined initial window, and the TCP proxy device performs data transmission according to the initial window size after establishing the TCP connection.

A device for adjusting the initial window size of a Transmission Control Protocol TCP connection, the device comprising:

The first determination module is used to determine the network access mode of the core network;

A second determining module, configured to determine the network bandwidth corresponding to the network access mode of the core network;

The third determining module is used to determine the initial window size of the TCP connection according to the network bandwidth, wherein the larger the network bandwidth, the larger the determined initial window, and the TCP proxy device performs data according to the initial window size after establishing the TCP connection transmission.

According to the scheme provided by the embodiment of the present invention, the initial window size of the TCP connection of the TCP proxy device is determined according to the network bandwidth corresponding to the network access mode of the core network, so that the TCP proxy device can realize data transmission according to the initial window size. In this way, the initial window size of the TCP connection of the TCP proxy device can be set for different network access methods, and the flexible setting of the initial window size of the TCP connection can be realized, so that the initial window size of the TCP connection can match the network access method. Further improve the transmission speed and bandwidth utilization of TCP connections.

Description of drawings

FIG. 1 is a flow chart of the steps of the method for adjusting the initial window size of a TCP connection provided by Embodiment 1 of the present invention;

2 is a schematic structural diagram of a device for adjusting the initial window size of a TCP connection provided by Embodiment 2 of the present invention;

3 is a schematic structural diagram of a system for adjusting the initial window size of a TCP connection provided by Embodiment 3 of the present invention;

4 is a schematic structural diagram of a system for adjusting the initial window size of a TCP connection provided by Embodiment 4 of the present invention;

5 is a schematic structural diagram of a system for adjusting the initial window size of a TCP connection provided by Embodiment 5 of the present invention;

FIG. 6 is a schematic structural diagram of a system for adjusting the initial window size of a TCP connection provided by Embodiment 6 of the present invention.

Detailed ways

In view of the problem that the transmission speed and bandwidth utilization of TCP connections cannot be effectively improved in the prior art, the embodiment of the present invention proposes that the initial window size can be determined according to the network bandwidth corresponding to the network access mode of the core network, so as to target different The network access mode of the network bandwidth determines the initial window size respectively, realizes the matching between the initial window size and the network bandwidth, and achieves the effect of effectively improving the transmission speed of the TCP connection and the utilization rate of the bandwidth. Preferably, a radio access type (Radio AccessType, RAT) parameter carried in a General Packet Radio Service Tunneling Protocol (GRRS Turning Protocol, GTP) message can be used to determine the network access mode.

Furthermore, the embodiment of the present invention also proposes that the initial window size may be determined in combination with network bandwidth and service type.

Furthermore, the embodiment of the present invention also proposes that the initial window size may be determined in combination with the network bandwidth and the probability of burst packet loss.

Wherein, the network access methods involved in various embodiments of the present invention include but are not limited to include 2G access methods, 3G access methods, LTE access methods and WLAN access methods.

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

Embodiment one,

Taking the use of the RAT parameters carried in the GTP message to determine the network access mode as an example, Embodiment 1 of the present invention provides a method for adjusting the initial window size of a TCP connection. The flow chart of the steps of the method can be shown in Figure 1. include:

Step 101, determine the parameter value of the RAT parameter.

Since the RAT parameter carried in the GTP message indicates the network access mode, for example, the corresponding relationship between the RAT parameter value and the network access mode may be shown in Table 1. Therefore, in this embodiment, the network access mode can be determined through the RAT parameter.

Network access method RAT parameter value (decimal) <reserved> 0 UTRAN 1 GERAN 2 WLAN 3 GAN 4 HSPA Evolution 5 EUTRAN 6 virtual 7 <sare> 8-255

Table 1

In this step, the parameter value of the RAT parameter carried in the GTP message transmitted between the core network devices may be determined.

Step 102, determine the network access mode of the core network.

In this step, the network access mode corresponding to the parameter value of the RAT parameter may be determined as the network access mode of the core network.

Of course, prior to this step, the correspondence between various parameter values of the RAT parameters and network access modes has been preset. Specifically, in this step, the network access mode corresponding to the parameter value determined in step 101 may be determined according to the correspondence between various parameter values of the preset RAT parameters and the network access mode.

Step 103, determine the network bandwidth.

In this step, the network bandwidth corresponding to the network access mode of the core network may be determined. Specifically, in this step, the network bandwidth corresponding to the network access mode of the core network may be determined according to the pre-stored correspondence between various network access modes and network bandwidth.

For example, in the network access methods involved in various embodiments of the present invention, the network bandwidth (data rate) in some network access methods is usually as follows, which can be understood as the network bandwidth corresponding to a pre-saved network access method, which is The actual network bandwidth corresponding to the network access method:

(1) 2G access methods, including but not limited to:

General Packet Radio Service (GPRS) access method, the theoretical data rate is 170Kbps, and the actual data rate is usually 30-70Kbps;

Enhanced Data Rate for GSMEvolution (EDGE) access mode, theoretical data rate 384Kbps.

(2) 3G access methods, including but not limited to:

Time Division Synchronous Code Division Multiple Access Next Evolution (TD-HSDPA) access mode, theoretical data rate downlink 2.8Mbps, uplink 128Kbps.

(3) LTE access mode, the theoretical data rate is 100Mbps downlink and 50Mbps uplink.

(4) WLAN access methods, including but not limited to:

The WLAN access method under the 802.11g standard, the theoretical data rate is 54Mbps, and the actual data rate is generally between 16 and 30Mbps;

The WLAN access method under the 802.11g+ standard has a theoretical data rate of 108 Mbps, but the actual data rate is generally 24 to 50 Mbps.

In this embodiment, initial windows may be set respectively for the 2G/3G access mode, the LTE access mode, and the WLAN access mode level. That is, the size of the initial window may be determined according to whether the network access mode is a 2G/3G access mode, an LTE access mode or a WLAN access mode.

Step 104, determine the initial window size.

In this step, the initial window size of the TCP connection of the TCP proxy device may be determined according to the network bandwidth determined in step 103, wherein the TCP proxy device performs data transmission according to the initial window size after establishing the TCP connection.

Specifically, the initial window size of the TCP connection of the TCP proxy device may be determined according to the principle of determining a larger initial window for a higher network bandwidth.

For example, for a higher network bandwidth, a larger initial window of the TCP connection, such as 10 segments, may be set; for a lower network bandwidth, a smaller initial window of the TCP connection, such as 6 segments, may be set.

Further, in this step, the downlink initial sending window size, the downlink initial receiving window size, the uplink initial sending window size and the uplink initial receiving window size of the TCP proxy device can be determined. Specifically, it can be achieved in the following ways:

According to the network bandwidth determined in step 103, the size of the downlink initial sending window of the TCP proxy device is determined, and the downlink initial sending window indicates the size of the initial sending window used to realize the TCP connection from the server to the client.

For example, for a network access mode corresponding to high bandwidth, a larger downlink initial sending window may be set, for example, for an LTE access mode and a WLAN access mode, the downlink initial sending window may be set to 10 segments. For the network access mode corresponding to low bandwidth, a smaller downlink initial sending window can be set, for example, for the 2G/3G access mode, the downlink initial sending window is set to 4 to 6 segments.

According to the network bandwidth determined in step 103, and the cache size of the TCP proxy device, determine the downlink initial receiving window size of the TCP proxy device, and the downlink initial receiving window represents an initial receiving window for realizing a TCP connection from the server to the client size.

Wherein, the maximum value of the downlink initial receiving window size may be set, for example, the maximum value is set to 64KB.

According to the network bandwidth determined in step 103, and the operating system information of the user agent (User Agent, UA), determine the size of the uplink initial sending window of the TCP proxy device, and the uplink initial sending window indicates that it is used to realize the TCP connection from the client to the server. The initial send window size for the connection. Of course, the UA operating system information is reported by the client before the initial uplink sending window is determined.

For example, when the network bandwidth is large and it is determined according to the information of the UA operating system that the TCP connection supports a relatively large sending window, an uplink initial sending window of the first size may be set. When the network bandwidth is relatively large, but it is determined according to the information of the UA operating system that the TCP connection supports a smaller sending window, an uplink initial sending window of a second size may be set, wherein the second size is smaller than the first size.

Similarly, when the network bandwidth is small, but it is determined according to the information of the UA operating system that the TCP connection supports a larger sending window, a third size of the uplink initial sending window may be set. When the network bandwidth is small, and it is determined according to the information of the UA operating system that the TCP connection supports a smaller sending window, an uplink initial sending window of a fourth size may be set, wherein the fourth size is smaller than the third size.

According to the network bandwidth determined in step 103, and the cache size of the TCP proxy device, determine the size of the uplink initial receiving window of the TCP proxy device, and the uplink initial receiving window represents the initial reception for realizing the TCP connection from the client to the server window size.

Wherein, the maximum value of the uplink initial receiving window size may be set, for example, the maximum value is set to 64KB.

In this step, it is not limited to determine the initial window size of the TCP connection of the TCP proxy device only according to the network bandwidth.

More preferably, when the network elements included in the core network have a seven-layer Deep Packet Inspection (Deep PacketInspection, DPI) function, the network bandwidth and the type of service carried by the TCP connection can be determined according to step 103, such as FTP download service type, web page Browse the business type, online video business type, etc., and determine the initial window size of the TCP connection of the TCP proxy device.

For example, it is possible to increase the initial window size of the TCP connection of the TCP proxy device determined only according to step 103 for a specified service type, such as for the mobile company's own business, increase only determined according to step 103 Network bandwidth, the initial window size of the TCP connection of the determined TCP proxy device is up to 10 segments.

As another example, priority can be set for services, such as setting the priority of services as high, medium, and low according to user visits. For high-priority services, the initial window size of the TCP connection of the TCP proxy device determined only according to the network bandwidth determined in step 103 can be increased, for example, to 10 segments. For services with medium priority, increase the initial window size of the TCP connection of the TCP proxy device determined only according to the network bandwidth determined in step 103, for example, to 6 segments. For low-priority services, keep only the network bandwidth determined according to step 103, and the determined initial window size of the TCP connection of the TCP proxy device remains unchanged.

More preferably, the initial window size of the TCP connection of the TCP proxy device can be determined according to the network bandwidth determined in step 103 and the probability of burst packet loss under the current network environment.

For example, when the probability of burst packet loss in the current network environment is greater than the set value, increase only the network bandwidth determined according to step 103, and determine the initial window size of the TCP connection of the TCP proxy device, such as, increase to 10 segments.

It should be noted that the execution subject of each step in this embodiment may be a TCP proxy device, or may be a network element independent of the TCP proxy device.

If the execution subject of each step is a TCP proxy device, the TCP proxy device can directly perform a TCP connection according to the determined initial window size. In addition, the TCP proxy device can directly obtain its own cache size. The TCP proxy device can be deployed on the core network device, preferably, it can be deployed on the core network device that can obtain the GTP message carrying the RAT parameter, so that the RAT parameter can be obtained faster, thereby determining the initial window size faster.

If the execution subject of each step is a network element independent of the TCP proxy device, the network element may send the determined initial window size to the TCP proxy device, and the TCP proxy device may perform a TCP connection according to the received initial window size. In addition, the buffer size of the TCP proxy device obtained by the network element may be sent by the TCP proxy device.

Based on the same inventive concept as the first embodiment, the following devices are provided.

Embodiment two,

Embodiment 2 of the present invention provides a device for adjusting the initial window size of a TCP connection. The device can be integrated in a TCP proxy device, or can be integrated in a network element independent of the TCP proxy device. The structural diagram of the device can be shown in FIG. 2 display, including:

The first determination module 11 is used to determine the network access mode of the core network; the second determination module 12 is used to determine the network bandwidth corresponding to the network access mode of the core network; the third determination module 13 is used to determine the network bandwidth according to the network bandwidth The initial window size of the TCP connection is determined, wherein the larger the network bandwidth is, the larger the determined initial window is, and the TCP proxy device performs data transmission according to the initial window size after establishing the TCP connection.

The first determination module 11 is specifically configured to determine the parameter value of the wireless access type RAT parameter carried in the General Packet Radio Service Tunneling Protocol GTP message transmitted between the core network equipment; the network corresponding to the parameter value of the RAT parameter The access mode is determined as the network access mode of the core network.

The third determining module 13 is specifically configured to determine the size of the downlink initial sending window according to the network bandwidth, and the downlink initial sending window indicates the size of the initial sending window used to realize the TCP connection from the server to the client.

The third determining module 13 is specifically configured to determine the downlink initial receiving window size according to the network bandwidth and the cache size of the TCP proxy device, and the downlink initial receiving window represents an initial receiving window for realizing a TCP connection from the server to the client. window size.

The device also includes a receiving module 14:

The receiving module 14 is used to receive the user agent UA operating system information reported by the client;

The third determination module 13 is specifically configured to determine the size of the uplink initial sending window according to the network bandwidth and the UA operating system information, and the uplink initial sending window indicates the size of the TCP connection used to realize the TCP connection from the client to the server. Initial send window size.

The third determining module 13 is specifically configured to determine the size of the uplink initial receiving window according to the network bandwidth and the buffer size of the TCP proxy device, and the uplink initial receiving window indicates that it is used to realize the TCP connection from the client to the server The initial receive window size for .

The third determination module 13 is specifically configured to determine the initial window size of the TCP connection according to the network bandwidth and the type of service carried by the TCP connection.

The third determination module 13 is specifically configured to determine the initial window size of the TCP connection according to the network bandwidth and the probability of burst packet loss under the current network environment.

Based on the same inventive concept as Embodiments 1 and 2, the following systems are provided.

Embodiment three,

Taking the execution subject of each step in Embodiment 1 as a policy server (PCRF) independent of the TCP proxy device, it can be understood that the device described in Embodiment 2 is integrated in the policy server PCRF, and the TCP proxy device is deployed in the core network device as an example. Embodiment 3 of the invention provides a system for adjusting the initial window size of a TCP connection. The structural diagram of the system can be shown in FIG. The second core network device, the server, and the policy server interacting with the second core network device and the TCP proxy device:

Among them, the TCP proxy device maintains the TCP connection with the client and the server respectively; the policy server can store the network bandwidth corresponding to various network access modes, and can store the corresponding relationship between various parameter values of RAT parameters and network access modes . When the policy server receives the parameter value of the RAT parameter reported by the second core network device, it determines the network access mode corresponding to the parameter value, and determines the network bandwidth corresponding to the network access mode, and then determines the TCP agent according to the network bandwidth. The initial window size of the TCP connection of the device, and can send the initial window size to the TCP proxy device, so that the TCP proxy device performs data transmission according to the initial window size after establishing the TCP connection.

The scheme of Embodiment 3 of the present invention will be described below through several specific examples.

Embodiment four,

Taking a Gateway GPRS Support Node (GGSN) where a TCP proxy device is deployed on a 2G/3G core network as an example, Embodiment 4 of the present invention provides a system for adjusting the initial window size of a TCP connection. The schematic diagram of the structure can be shown in Figure 4, including the terminal where the client is connected in sequence, the serving general packet wireless service support node (ServicingGPRS Support Node, SGSN), the GGSN with the TCP proxy device deployed, the server, and the connection with the GGSN and the TCP proxy The policy server with which the device interacts:

Among them, the TCP proxy device maintains the TCP connection with the client and the server respectively; the policy server can store the network bandwidth corresponding to various network access modes, and can store the corresponding relationship between various parameter values of RAT parameters and network access modes . When the policy server receives the parameter value of the RAT parameter reported by the GGSN, it determines the network access mode corresponding to the parameter value, and determines the network bandwidth corresponding to the network access mode, and then determines the TCP connection of the TCP proxy device according to the network bandwidth The initial window size, and can send the initial window size to the TCP proxy device, so that the TCP proxy device performs data transmission according to the initial window size after establishing the TCP connection.

Embodiment five,

Taking the public data network gateway (PDN Gateway, P-GW) deployed on the LTE core network as a TCP proxy device as an example, Embodiment 5 of the present invention provides a system for adjusting the initial window size of a TCP connection. The structural diagram of the system can be as follows As shown in Figure 5, it includes the terminal where the client is connected in sequence, the Serving Gateway (Serving Gateway, S-GW), the P-GW deployed with the TCP proxy device, the server, and the strategy for interacting with the P-GW and the TCP proxy device server:

Among them, the TCP proxy device maintains the TCP connection with the client and the server respectively; the policy server can store the network bandwidth corresponding to various network access modes, and can store the corresponding relationship between various parameter values of RAT parameters and network access modes . When the policy server receives the parameter value of the RAT parameter reported by the P-GW, it determines the network access mode corresponding to the parameter value, and determines the network bandwidth corresponding to the network access mode, and then determines the TCP proxy device according to the network bandwidth. The initial window size of the TCP connection, and the initial window size may be sent to the TCP proxy device, so that the TCP proxy device performs data transmission according to the initial window size after establishing the TCP connection.

Embodiment six,

Taking the public data network gateway (PDNGateway, P-GW) where the TCP proxy device is deployed on the WLAN core network as an example, Embodiment 6 of the present invention provides a system for adjusting the initial window size of a TCP connection. The structural diagram of the system can be shown in the figure 6, including the terminal where the client is connected in sequence, the access point, the access controller (AP, AC), the P-GW deployed with the TCP proxy device, the server, and the interaction with the P-GW and the TCP proxy device The policy server:

Among them, the TCP proxy device maintains the TCP connection with the client and the server respectively; the policy server can store the network bandwidth corresponding to various network access modes, and can store the corresponding relationship between various parameter values of RAT parameters and network access modes . When the policy server receives the parameter value of the RAT parameter reported by the P-GW, it determines the network access mode corresponding to the parameter value, and determines the network bandwidth corresponding to the network access mode, and then determines the TCP proxy device according to the network bandwidth. The initial window size of the TCP connection, and the initial window size may be sent to the TCP proxy device, so that the TCP proxy device performs data transmission according to the initial window size after establishing the TCP connection.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and combinations of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a Means for realizing the functions specified in one or more steps of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present application have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be construed to cover the preferred embodiment and all changes and modifications which fall within the scope of the application.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (16)

1. a method for adjusting the initial window size of transmission control protocol TCP connection, it is characterized in that, described method comprises: Determine the network access mode of the core network; determining the network bandwidth corresponding to the network access mode of the core network; Determine the initial window size of the TCP connection according to the network bandwidth, wherein the larger the network bandwidth, the larger the determined initial window, and the TCP proxy device performs data transmission according to the initial window size after establishing the TCP connection. 2. The method according to claim 1, wherein determining the network access mode of the core network specifically comprises: Determine the parameter value of the wireless access type RAT parameter carried in the General Packet Radio Service Tunneling Protocol GTP message transmitted between the core network equipment; The network access mode corresponding to the parameter value of the RAT parameter is determined as the network access mode of the core network. 3. The method according to claim 1, wherein, determining the initial window size of the TCP connection according to the network bandwidth, specifically comprises: Determine the size of the downlink initial sending window according to the network bandwidth, and the downlink initial sending window indicates the size of the initial sending window used to realize the TCP connection from the server to the client. 4. The method according to claim 1, wherein determining the initial window size of the TCP connection according to the network bandwidth specifically comprises: According to the network bandwidth and the cache size of the TCP proxy device, the downlink initial receiving window size is determined, and the downlink initial receiving window represents the initial receiving window size for realizing the TCP connection from the server to the client. 5. The method according to claim 1, wherein, before determining the initial window size of the TCP connection according to the network bandwidth, the method further comprises: Receive the user agent UA operating system information reported by the client; Then, determine the initial window size of the TCP connection according to the network bandwidth, specifically including: Determine the size of the uplink initial sending window according to the network bandwidth and the UA operating system information, and the uplink initial sending window indicates the size of the initial sending window used to realize the TCP connection from the client to the server. 6. The method according to claim 1, wherein determining the initial window size of the TCP connection according to the network bandwidth specifically comprises: According to the network bandwidth and the cache size of the TCP proxy device, the size of the uplink initial receiving window is determined, and the uplink initial receiving window indicates the size of the initial receiving window used to realize the TCP connection from the client to the server. 7. The method according to any one of claims 1 to 6, wherein determining the initial window size of the TCP connection according to the network bandwidth specifically comprises: The initial window size of the TCP connection is determined according to the network bandwidth and the type of service carried by the TCP connection. 8. The method according to any one of claims 1 to 6, wherein determining the initial window size of the TCP connection according to the network bandwidth specifically comprises: The initial window size of the TCP connection is determined according to the network bandwidth and the probability of burst packet loss under the current network environment. 9. A device for adjusting the initial window size of the Transmission Control Protocol TCP connection, characterized in that the device comprises: The first determination module is used to determine the network access mode of the core network; A second determining module, configured to determine the network bandwidth corresponding to the network access mode of the core network; The third determining module is used to determine the initial window size of the TCP connection according to the network bandwidth, wherein the larger the network bandwidth, the larger the determined initial window, and the TCP proxy device performs data according to the initial window size after establishing the TCP connection transmission. 10. The apparatus according to claim 9, wherein the first determining module is specifically configured to determine the wireless access type RAT parameter carried in the General Packet Radio Service Tunneling Protocol (GTP) message transmitted between core network devices The parameter value of the RAT parameter; determining the network access mode corresponding to the parameter value of the RAT parameter as the network access mode of the core network. 11. The device according to claim 9, wherein the third determination module is specifically configured to determine the downlink initial sending window size according to the network bandwidth, and the downlink initial sending window indicates that the slave server The initial send window size for TCP connections to clients. 12. The apparatus according to claim 9, wherein the third determining module is specifically configured to determine the downlink initial receiving window size according to the network bandwidth and the cache size of the TCP proxy device, and the downlink initial receiving window size is window represents the initial receive window size used to implement the TCP connection from the server to the client. 13. The device according to claim 9, further comprising a receiving module: The receiving module is configured to receive user agent UA operating system information reported by the client; The third determination module is specifically configured to determine the size of the uplink initial sending window according to the network bandwidth and the UA operating system information, and the uplink initial sending window indicates the size of the uplink initial sending window used to realize the TCP connection from the client to the server. Initial send window size. 14. The apparatus according to claim 9, wherein the third determining module is specifically configured to determine the size of the uplink initial receiving window according to the network bandwidth and the cache size of the TCP proxy device, and the uplink Initial Receive Window indicates the initial receive window size used to implement a TCP connection from the client to the server. 15. The device according to any one of claims 9 to 14, wherein the third determination module is specifically configured to determine the initial window size of the TCP connection according to the network bandwidth and the type of service carried by the TCP connection . 16. The device according to any one of claims 9 to 14, wherein the third determining module is specifically configured to determine the TCP packet loss probability according to the network bandwidth and the probability of burst packet loss under the current network environment. The initial window size for connections.