WO2014015503A1

WO2014015503A1 - Data transmission method, mobile terminal and proxy server

Info

Publication number: WO2014015503A1
Application number: PCT/CN2012/079203
Authority: WO
Inventors: 刘治锋; 何洋
Original assignee: 华为技术有限公司
Priority date: 2012-07-26
Filing date: 2012-07-26
Publication date: 2014-01-30
Also published as: CN102907071B; CN102907071A

Abstract

The present invention relates to the technical field of communications, and particularly to a data transmission method, a mobile terminal and a proxy server. The data transmission method comprises: a client judging whether there is a single TCP connection channel identifier at the local site or not; and if there is a single TCP connection channel identifier at the local site, when the client accesses a plurality of domain names, the client and the proxy server conducting data transmission in a single TCP connection channel corresponding to the single TCP connection channel identifier using the SPDY protocol. It can be known from this solution that a single TCP connection channel is established between a client in a mobile terminal and a proxy server, and when the client accesses a plurality of domain names, all the data transmission is conducted in the single TCP connection channel. The resources for the client to establish a plurality of TCP connection channels for the plurality of domain names are saved, and at the same time, the capability for conducting data transmission between the client in the mobile terminal and the proxy server is further improved by conducting data transmission in the single TCP connection channel using the SPDY protocol.

Description

Data transmission method, mobile terminal and proxy server

Technical field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method, a mobile terminal, and a proxy server. Background technique

In the process of web browser running through the browser on the mobile terminal, the traditional TCP/I P communication technology on the PC is still used. The practice of this technology has proven to be effective and high performance.

However, the inventor found that the existing mobile terminal accesses the website page, and has the following technical problems: When the mobile terminal accesses multiple domain names based on the HTTP protocol, the mobile terminal establishes a Transmission Control Protocol (TCP) connection for each domain name. In the HTTP 1.1 version, each TCP connection can send and receive multiple HTTP requests/responses. Due to the hardware limitations of the mobile terminal, the resources on the mobile terminal are limited, and establishing a TCP connection channel requires a relatively large amount of resources, so When a mobile terminal accesses multiple domain names, multiple TCP connections need to be established, which consumes more resources, and because the bandwidth of the mobile network is small, the amount of data accessed by the mobile terminal on each domain name is relatively small, so each TCP connection channel The transmission utilization rate is not high. Summary of the invention

Embodiments of the present invention provide a data transmission method, a mobile terminal, and a proxy server for improving the efficiency of data transmission between a mobile terminal and a proxy server.

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

The client determines whether there is a single TCP connection channel identifier in the local area;

When a single TCP connection channel identifier exists locally, when the client accesses multiple domain names, the client and the proxy server perform data transmission by using the SPDY protocol in a single TCP connection channel corresponding to the single TCP connection channel identifier. - Another embodiment of the present invention provides a data transmission method, including:

After receiving the TCP connection request sent by the client and carrying the SYN flag, generating a single TCP connection channel identifier;

Sending, to the client, a TCP connection response carrying a SYN flag and an ACK flag, where the TCP connection response carries the single TCP connection channel identifier;

Receiving, by the client, a TCP connection response carrying an ACK flag, to complete establishment of a single TCP connection channel corresponding to the single TCP connection channel identifier;

When the client accesses multiple domain names, the client performs data transmission with the SPDY protocol in the single TCP connection channel.

An embodiment of the present invention provides a mobile terminal for data transmission, including:

a judging module, configured to determine whether a local TCP connection channel identifier exists in the locality;

The transmission module is configured to perform data transmission by using the SPDY protocol in a single TCP connection channel corresponding to the single TCP connection channel identifier when the mobile terminal accesses multiple domain names when the single TCP connection channel identifier exists locally.

An embodiment of the present invention provides a proxy server, including:

a generating module, configured to generate a single TCP connection channel identifier after receiving a TCP connection request sent by the client and carrying the SYN flag;

a sending module, configured to send, to the client, a TCP connection response carrying a SYN flag and an ACK flag, where the TCP connection response carries the single TCP connection channel identifier;

a receiving module, configured to receive a TCP connection response that is sent by the client and that carries an ACK flag, to complete establishment of a single TCP connection channel corresponding to the single TCP connection channel identifier;

a transmission module, configured to: when the client accesses multiple domain names, with the client in the single

Data transmission is performed by the SPDY protocol in the TCP connection channel.

It can be seen from the above technical solution provided by the embodiment of the present invention that a client establishes a single TCP connection channel with a proxy server in a mobile terminal, and when the client performs multiple domain name accesses, data is performed in the single TCP connection channel. The transmission saves the resources for the client to establish multiple TCP connection channels for multiple domain names, and simultaneously transmits data by using the SPDY protocol in the single TCP connection channel. – Since the SPDY protocol has the capability of concurrent data transmission, the ability of the client and the proxy server to transmit data in the mobile terminal is further improved. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings to be used in the description of the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

FIG. 1 is a schematic structural diagram of data transmission according to an embodiment of the present invention;

2 is a method for data transmission according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a data transmission method according to another embodiment of the present invention; FIG.

FIG. 4 is a signaling flowchart of data transmission according to an embodiment of the present invention;

FIG. 5 is a cross-sectional diagram of concurrent data transmission based on a single TCP connection channel according to an embodiment of the present invention.

FIG. 6 is a structural diagram of a mobile terminal for data transmission according to an embodiment of the present invention. FIG. 7 is a structural diagram of a proxy server according to an embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a diagram of a data transmission architecture provided by an embodiment of the present invention, including a client 101, a proxy server 102, and a web server 103. The embodiment specifically includes:

The client 101 is a client on the mobile terminal, such as a browser, for requesting data content from the proxy server 102 to the web server 103 for data transmission.

The proxy server 102 is mainly used to establish a single TCP connection with the client 101 in the mobile terminal. When the client 101 accesses multiple domain names, data transmission is performed on the single TCP connection channel based on the SPDY protocol. It should be noted that the proxy server 102 may also collect the functions of the service, or deploy the proxy server on the service server, where the function of the service or the service server may be used to respond to the return of the web server 103 to the client 101. The data is subjected to related processing, such as reformatting, compression, etc., thereby reducing the size of the response data, thereby improving the access speed of the client 101 when accessing the Web server 103, and improving the efficiency of data transmission.

The web server 103 is configured to provide the accessed data content to the client 101 through the proxy server 102.

It should be noted that the SPDY protocol is used for data transmission in the present invention. SPDY is a TCP-based application layer protocol developed by Google. The SPDY protocol is designed to reduce page load time and security by compressing, multiplexing, and prioritizing. When using the SPDY protocol for data access, there can be multiple parallel requests/responses within a TCP connection. Compared to the HTTP protocol, the TCP connection cannot do multiple parallel requests/responses, between the client and the server in the mobile terminal. Data transmission using the SPDY protocol is obviously more efficient than transmission using the HTTP protocol. FIG. 2 illustrates a data transmission method according to an embodiment of the present invention. In this embodiment, a client on a mobile terminal is used as an execution entity.

5201. The client determines whether there is a single TCP connection channel identifier in the local area.

5202. When a single TCP connection channel identifier exists locally, when the client accesses multiple domain names, the client and the proxy server perform data transmission by using the SPDY protocol in a single TCP connection channel corresponding to the single TCP connection channel identifier.

In addition, if the client determines that there is no single TCP connection channel identifier in the local area, the client and the proxy server establish a single TCP connection channel through the "three-way handshake", which specifically includes: the client sends a TCP connection request carrying the SYN flag to the proxy server. The client receives the TCP connection response returned by the proxy server carrying the SYN flag and the ACK flag, and the TCP connection response carries a single TCP connection channel identifier; the client sends a TCP connection response carrying the ACK flag to the proxy server to complete Establishing a single TCP connection channel corresponding to the single TCP connection channel identifier; wherein the single TCP – The connection channel identifier is carried by the extended SPDY header field in the TCP connection response sent by the proxy server described above. It should be noted that, in the present invention, the "three-way handshake" process of establishing a TCP connection channel is slightly different from the "three-way handshake" process of the TCP standard, and is represented by the extended SPDY in the TCP connection response sent by the proxy server. The header field carries a single TCP connection channel identifier.

In addition, when the client determines that there is no data transmission in the single TCP connection channel within a preset threshold time, the client actively initiates a request to disconnect the single TCP connection channel from the proxy server to disconnect the single TCP connection channel, thereby saving the TCP connection. Resources. It should be noted that this is only a case of disconnecting a single TCP connection channel. The present invention does not limit other situations in which a single TCP connection channel is disconnected. For example, when the client stops, the single TCP connection channel is also The proxy server side initiates a disconnection.

It can be seen from the above embodiment that the client establishes a single TCP connection channel with the proxy server in the mobile terminal, and when the client performs multiple domain name accesses, data transmission is performed in the single TCP connection channel, which saves the client. The domain name establishes resources of multiple TCP connection channels, and the data transmission is performed by the SPDY protocol in the single TCP connection channel. Since the SPDY protocol has the capability of concurrent data transmission, the data transmission between the client and the proxy server in the mobile terminal is further improved. Ability. FIG. 3 illustrates a data transmission method according to another embodiment of the present invention. In this embodiment, a proxy server is used as an execution host, and the embodiment specifically includes:

S301. After receiving the TCP connection request sent by the client and carrying the SYN flag, generate a single TCP connection channel identifier.

S302: Send a TCP connection response carrying the SYN flag and the ACK flag to the client, where the TCP connection response carries the single TCP connection channel identifier. The single TCP connection channel identifier is implemented by extending the SPDY header field in the TCP connection response.

S303: Receive a TCP connection response that is sent by the client and that carries an ACK flag, to complete establishment of a single TCP connection channel corresponding to the single TCP connection channel identifier.

5304. When the client accesses multiple domain names, the client is in the single TCP connection channel. – Data transmission using the SPDY protocol.

It can be seen from the above embodiment that the client establishes a single TCP connection channel with the proxy server in the mobile terminal, and when the client performs multiple domain name accesses, data transmission is performed in the single TCP connection channel, which saves the client. The domain name establishes resources of multiple TCP connection channels, and the data transmission is performed by the SPDY protocol in the single TCP connection channel. Since the SPDY protocol has the capability of concurrent data transmission, the data transmission between the client and the proxy server in the mobile terminal is further improved. Ability. FIG. 4 illustrates a signaling flow of data transmission provided by an embodiment of the present invention. This embodiment describes a signaling interaction process between a client and a proxy server. Specifically, the embodiment includes:

5401. The client determines that there is no single TCP connection channel identifier in the local area.

Specifically, before the client accesses the domain name, it first determines whether there is a single TCP connection channel identifier. If there is a single TCP connection channel identifier, it indicates that there is a single TCP connection channel, and the client does not need to establish a single TCP connection for accessing the domain name. The channel directly uses the single TCP connection channel for data transmission, thereby saving resources for establishing a single TCP connection channel. If there is no single TCP connection channel identifier, it means that there is no single TCP connection channel, and the client first needs to establish a single The TCP connects to the channel, and then uses the established single TCP connection channel for data transmission.

S401 takes the client's first access to the domain name as an example. Since there is no single TCP connection channel in the client at this time, the result of the client judgment in S401 is that there is no single TCP connection channel identifier locally.

When the client determines that there is no single TCP connection channel identifier, the client needs to establish a TCP connection with the proxy server. S402, S404 and S405 describe the "three-way handshake" process of establishing a TCP connection:

5402. The client sends a TCP connection request carrying a SYN flag to the proxy server.

After receiving the TCP connection request sent by the client, the proxy server generates a single TCP connection channel identifier, which is used to identify a single TCP connection channel established by the client and the proxy server.

S404: The client receives a TCP connection response that carries a SYN flag and an ACK flag, and the TCP connection response further includes a single TCP connection established by the proxy server. — The above single TCP connection channel identifier generated by the channel.

Specifically, the proxy server may extend the header field of the SPDY in the TCP connection response, and carry the generated single TCP connection channel identifier in the SPDY header field, and then send the packet to the client.

S405: The client sends a TCP connection response carrying the ACK flag to the proxy to complete the establishment of the single TCP connection channel.

After completing the establishment of the single TCP connection channel, whether the client continues to access the domain name or accesses the new domain name, the client uses the single TCP connection channel established above to perform data transmission with the proxy server, that is, the client is When accessing multiple domain names, the single TCP connection channel is used to transmit data with the proxy server, and then the data is transmitted with the web server. The specific process is as follows:

5406. The client determines that there is a single TCP connection channel identifier.

The client is in the next access. If the access is made to the new domain name, it is necessary to determine whether there is a single TCP connection channel identifier, that is, whether there is a single TCP connection channel. Since the above has established a single TCP connection channel, there is a single at this time. TCP connection channel identifier.

S407. The client sends a data access request based on the SPDY protocol to the proxy server in the single TCP connection channel corresponding to the single TCP connection channel identifier.

S408: The client receives the SPDY protocol-based data access response sent by the proxy server in the single TCP connection channel corresponding to the single TCP connection channel identifier.

It should be noted that S407 and S408 describe a data transmission between the client and the proxy server based on the SPDY protocol. In fact, the client and the proxy server are concurrent data transmission based on a single TCP connection channel, and concurrent data transmission. The process is illustrated in Figure 5. Figure 5 depicts the concurrent data transfer process between the client and the proxy server in a single TCP connection channel. Figure 5 only shows four concurrent requests/responses exemplarily.

5409. The client determines that the single TCP connection channel has no data transmission within a threshold time, wherein the threshold may be set in advance on the client.

5410. When the client does not have data transmission in the single TCP connection channel within the threshold time, the client disconnects the single TCP connection channel from the proxy server to save the TCP connection resource. — —

S410 is a case where a single TCP connection channel is disconnected. The single TCP connection channel is disconnected to avoid wasting TCP connection resources. The present invention does not limit other situations in which the single TCP connection channel can be disconnected, such as stopping at the client. In the case of operation, the TCP connection channel is actively disconnected by the proxy server.

It should be noted that in the process of the complete client, the proxy server and the web server, there is an interaction process between the proxy server and the web server, since the interaction process between the proxy server and the web server adopts multiple TCP connection channels, and After obtaining the response data returned by the web server, the proxy server can rearrange and deepen the response data, reduce the amount of data returned to the client, thereby improving the transmission speed of the downlink data, and the interaction process between the proxy server and the web server. It can be implemented by using existing technology, and the present invention is not described in detail.

It can be seen from the above embodiment that the client establishes a single TCP connection channel with the proxy server in the mobile terminal, and when the client performs multiple domain name accesses, data transmission is performed in the single TCP connection channel, which saves the client. The domain name establishes resources of multiple TCP connection channels, and the data transmission is performed by the SPDY protocol in the single TCP connection channel. Since the SPDY protocol has the capability of concurrent data transmission, the data transmission between the client and the proxy server in the mobile terminal is further improved. Ability. FIG. 6 illustrates a mobile terminal 600 that can be used for data transmission according to an embodiment of the present invention, which specifically includes:

The determining module 601 is configured to determine whether there is a single TCP connection channel identifier locally.

The first transmission module 602 is configured to: when the mobile terminal 600 accesses multiple domain names, when the mobile terminal 600 accesses multiple domain names, perform data with the SPDY protocol in the single TCP connection channel corresponding to the proxy server in the single TCP connection channel identifier. transmission.

Further, when the determining module 601 determines that there is no single TCP connection channel identifier in the local area, the mobile terminal 600 further includes:

The first sending module 603 is configured to send a TCP connection request carrying the SYN flag to the proxy server. The first receiving module 604 is configured to receive a TCP connection response that is sent by the proxy server and carries a SYN flag and an ACK flag, where the TCP connection response carries a single TCP connection channel identifier.

The first sending module 603 is further configured to send a TCP connection response carrying the ACK flag to the proxy server, to complete establishment of a single TCP connection channel corresponding to the single TCP connection channel identifier.

Further, the mobile terminal 600 further includes:

The first disconnecting module 605 is configured to disconnect the single TCP connection channel from the proxy server when there is no data transmission in the single TCP connection channel within a preset threshold. The single TCP connection channel is disconnected to avoid wasting TCP connection resources. The present invention does not limit other situations in which the single TCP connection channel is disconnected. For example, when the client stops running, the single TCP connection channel is actively initiated by the proxy server. disconnect.

It can be seen from the above embodiment that the client establishes a single TCP connection channel with the proxy server in the mobile terminal, and when the client performs multiple domain name accesses, data transmission is performed in the single TCP connection channel, which saves the client. The domain name establishes resources of multiple TCP connection channels, and the data transmission is performed by the SPDY protocol in the single TCP connection channel. Since the SPDY protocol has the capability of concurrent data transmission, the data transmission between the client and the proxy server in the mobile terminal is further improved. Ability. FIG. 7 illustrates a proxy server 700 according to an embodiment of the present invention, which specifically includes: a generating module 701, configured to generate a single TCP connection channel identifier after receiving a TCP connection request that carries a SYN flag sent by a client.

The second sending module 702 is configured to send, to the client, a TCP connection response carrying a SYN flag and an ACK flag, where the TCP connection response carries the single TCP connection channel identifier.

The second receiving module 703 is configured to receive a TCP connection response that is sent by the client and that carries an ACK flag, so as to complete establishment of a single TCP connection channel corresponding to the single TCP connection channel identifier.

The second transmission module 704 is configured to perform data transmission with the SPDY protocol in the single TCP connection channel when the client accesses multiple domain names.

Further, the proxy server 700 further includes: - a second disconnection module 705, configured to disconnect the single TCP connection channel from the client when there is no data transmission in the single TCP connection channel within a preset threshold. The TCP connection channel is disconnected to avoid wasting TCP connection resources. The present invention does not limit other disconnected TCP connection channels. For example, when the client stops running, the TCP connection channel is actively disconnected by the proxy server.

It can be seen from the above embodiment that the client establishes a single TCP connection channel with the proxy server in the mobile terminal, and when the client performs multiple domain name accesses, data transmission is performed in the single TCP connection channel, which saves the client. The domain name establishes resources of multiple TCP connection channels, and the data transmission is performed by the SPDY protocol in the single TCP connection channel. Since the SPDY protocol has the capability of concurrent data transmission, the data transmission between the client and the proxy server in the mobile terminal is further improved. Ability. A person skilled in the art can understand that all or part of the process of implementing the above embodiments can be completed by a computer program to instruct related hardware, and the above program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (RAM: Read-Only Memory), or a random access memory (RAM). The description of the embodiment is only for helping to understand the technical solution of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in specific embodiments and application scopes. The contents of this specification are not to be construed as limiting the invention.

Claims

claims

1. A data transmission method, characterized by including:

The client determines whether there is a single TCP connection channel identifier locally;

When a single TCP connection channel identifier exists locally and the client accesses multiple domain names, the client and the proxy server use the SPDY protocol to transmit data in the single TCP connection channel corresponding to the single TCP connection channel identifier.

2. The data transmission method as claimed in claim 1, further comprising:

When there is no single TCP connection channel identifier locally, the client sends a TCP connection request carrying the SYN flag to the proxy server;

The client receives a TCP connection response carrying a SYN flag and an ACK flag returned by the proxy server, and the TCP connection response carries a single TCP connection channel identifier;

The client sends a TCP connection response carrying an ACK flag to the proxy server to complete the establishment of a single TCP connection channel corresponding to the single TCP connection channel identifier.

3. The data transmission method according to claim 2, characterized in that the single TCP connection channel identification is carried by the extended SPDY header field in the TCP connection response returned by the proxy server.

4. The data transmission method according to any one of claims 1 to 3, further comprising: within a preset threshold, when there is no data transmission in the single TCP connection channel, the client and the agent The server disconnects the single TCP connection channel.

5. A data transmission method, characterized by including:

After receiving the TCP connection request carrying the SYN flag sent by the client, generate a single TCP connection channel identifier;

Send a TCP connection response carrying a SYN flag and an ACK flag to the client, where the TCP connection response carries the single TCP connection channel identifier;

Receive the TCP connection response carrying the ACK flag sent by the client to complete the establishment of a single TCP connection channel corresponding to the single TCP connection channel identifier;

When the client accesses multiple domain names, in the single TCP connection channel with the client Data transmission is performed using SPDY protocol.

6. The data transmission method according to claim 5, characterized in that the single TCP connection channel identifier is carried by the extended SPDY header field in the TCP connection response sent to the client.

7. The data transmission method according to claim 5 or 6, further comprising: within a preset threshold, when there is no data transmission in the single TCP connection channel, disconnecting the data from the client. Single TCP connection channel.

8. A mobile terminal for data transmission, characterized by including:

Determination module, used to determine whether there is a single TCP connection channel identifier locally;

The first transmission module is used to transmit data with the proxy server using the SPDY protocol in the single TCP connection channel corresponding to the single TCP connection channel identifier when the mobile terminal accesses multiple domain names when a single TCP connection channel identifier exists locally. transmission.

9. The mobile terminal according to claim 8, further comprising:

The first sending module is used to send a TCP connection request carrying a SYN flag to the proxy server when a single TCP connection channel identifier does not exist locally;

The first receiving module is configured to receive a TCP connection response carrying a SYN flag and an ACK flag returned by the proxy server, where the TCP connection response carries a single TCP connection channel identifier;

The first sending module is also configured to send a TCP connection response carrying an ACK flag to the proxy server to complete the establishment of a single TCP connection channel corresponding to the single TCP connection channel identifier.

10. The mobile terminal according to claim 8 or 9, further comprising: a first disconnection module, configured to connect to the mobile terminal when there is no data transmission in the single TCP connection channel within a preset threshold. The proxy server disconnects the single TCP connection channel.

11. A proxy server, characterized by including:

The generation module is used to generate a single TCP connection channel identifier after receiving the TCP connection request carrying the SYN flag sent by the client;

The second sending module is configured to send a TCP connection response carrying a SYN flag and an ACK flag to the client, where the TCP connection response carries the single TCP connection channel identifier;

The second receiving module is configured to receive the TCP connection response carrying the ACK flag sent by the client. to complete the establishment of a single TCP connection channel corresponding to the single TCP connection channel identifier; the second transmission module is used to communicate with the client on the single TCP connection channel when the client accesses multiple domain names. The SPDY protocol is used for data transmission.

12. The proxy server according to claim 11, further comprising: a second disconnect module, configured to communicate with the client when there is no data transmission in the single TCP connection channel within a preset threshold. The end disconnects the single TCP connection channel.