CN114599089A - A data communication method and related device - Google Patents

Abstract

The application provides a data communication method and a related device, which are applied to a client, wherein the client is in wireless connection with a server through a base station, and the method comprises the following steps: acquiring a first message length sent by a base station, and determining the smaller message length in the first message length and the second message length as a third message length; the first message length is the maximum data length determined by the operator network, and the second message length is the maximum data length of a message segment expected to be received by the client; acquiring a fourth message length sent by the server, and determining a target message length according to the smaller message length in the third message length and the fourth message length; the fourth message length is the maximum data length of the message segment expected to be received by the server; and sending the first message segment to the server side through the base station, wherein the length of the first message segment is determined based on the length of the target message. The method and the device can reduce the possibility of fragment transmission of the TCP data packet during transmission in the operator network and improve the utilization rate of network resources.

Description

A data communication method and related device

technical field

The present application relates to the field of computers, and in particular, to a data communication method and related apparatus.

Background technique

With the development of information technology, mobile communication technology has brought a lot of convenience to people's work and life, and has become an indispensable part of people's work and life.

Generally, reliable mobile communication can be performed between two electronic devices through a transmission control protocol (Transmission Control Protocol, TCP). Before performing mobile communication, the two electronic devices establish a reliable connection through TCP three-way handshake. In the TCP three-way handshake process, two electronic devices will notify each other of the value of the maximum message length (Maximum Segment Size, MSS) of their own link, and the two electronic devices will generally report the smaller value of the two MSSs. The sending length of the TCP packet sent as the own side.

This method satisfies the requirements of the two electronic devices on the receiving length, but the communication between the two electronic devices also requires the participation of devices such as the operator's network. When the TCP protocol established by the operator's network is inconsistent with the TCP protocol established by the electronic device, there will be a problem that the MSS of the operator's network link is smaller than the value of the MSS of the link where the electronic device is located, which results in TCP data packets. Transmission in the operator network requires fragmented transmission, fragmentation and reassembly of a large number of data packets, resulting in the problem of low utilization of network resources.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a data communication method and related device in view of the above technical problems, so as to reduce the possibility of fragmented transmission of TCP data packets during transmission in the operator's network, and improve the utilization rate of network resources.

In a first aspect, the present invention provides a data communication method, which is applied to a client. The client is wirelessly connected to a server through a base station. The method includes: acquiring the length of a first packet sent by the base station, and determining The smaller of the first packet length and the second packet length is the third packet length; wherein, the first packet length is the maximum data length determined by the operator network, and the second packet length is the maximum data length determined by the operator network. The length of the message is the maximum data length of the message segment that the client expects to receive; the fourth message length sent by the server is obtained through the Transmission Control Protocol/Internet Protocol TCP/IP protocol stack, and according to the The smaller of the three packet lengths and the fourth packet length determines the target packet length; wherein the fourth packet length is the maximum data length of the packet segment that the server expects to receive ; Send a first message segment to the server through the base station, and the length of the first message segment is determined based on the length of the target message.

Therefore, the client and the server perform data communication according to the length of the target message. If the length of the first message is less than the length of the third message, the length of the target message is the length of the first message, so that the client In the data communication between the client and the server, after the data is transmitted to the operator's network (base station or core network), the operator's network will no longer fragment the data, and the data does not need to be reorganized after reaching the server. Network resource utilization, saving CPU processing resources and network bandwidth resources, avoiding network congestion, and improving data transmission efficiency.

In a possible implementation manner, the client includes a host and a wireless communication module, the TCP/IP protocol stack is configured on the wireless communication module, and the TCP/IP protocol stack is configured through the transmission control protocol/internet protocol. The protocol stack obtains the fourth packet length sent by the server, and determines the target packet length according to the smaller packet length of the third packet length and the fourth packet length, including: the wireless The communication module sends the third message length to the server through the TCP/IP protocol stack; the wireless communication module receives the fourth message sent by the server through the TCP/IP protocol stack. packet length; the wireless communication module determines that the smaller packet length of the third packet length and the fourth packet length is the target packet length.

Understandably, in order to complete the TCP three-way handshake protocol and ensure reliable communication between the client and the server, the client sends an ACK response message to the server before normal communication with the server. That is, in a possible implementation manner, after the wireless communication module determines that the smaller one of the third packet length and the fourth packet length is the target packet length , before the sending the first message segment to the server through the base station, the method further includes: the wireless communication module sends the target message to the server through the TCP/IP protocol stack message length, so that the client and the server perform data communication based on the target message length.

Understandably, if the TCP/IP protocol stack is configured in the wireless communication module (it can also be understood that the client and the server are about to carry out built-in services), the wireless communication module has the authority to control the TCP/IP protocol stack when the three-way handshake is performed. handshake data. Therefore, if the TCP/IP protocol stack is configured in the wireless communication module, the wireless communication module can use the smaller value of the first packet length and the second packet length ( The third packet length) performs the TCP three-way handshake.

Understandably, during the first handshake, the handshake action is performed with the smaller of the first packet length and the second packet length (the third packet length), rather than the fourth one after the second handshake. The values of the packet length and the third packet length modify the data sent by the server, which can provide better guarantee for data synchronization. Exemplarily, the handshake action is performed with the third packet length during the first handshake, regardless of whether the server implements the data communication method provided by this application, the server also indirectly performs the handshake according to the first three-slave handshake in the TCP. The smaller value of the message length, the second message length, and the third message length determines the message length of the communication. For example, both the client and the server reside on the same core network of the same operator network, and the core network has the same message length for the segment of the data expected to be received by the client and the server, and only consists of When the client implements the data communication method of the present application, since the server cannot know whether the client has modified the data content of the second handshake, the server will still follow the obtained second packet length and third packet length. The length of the message determines the length of the target message, instead of determining the length of the communication message based on the smaller of the first message length, the second message length and the third message length, which eventually leads to the data sent by the server to the client. When passing through the core network, it will still be transmitted in fragments.

Therefore, during the first handshake, the handshake action is performed with the smaller value of the first packet length and the second packet length (the third packet length), which can further improve network resource utilization and save CPU processing resources. and network broadband resources to avoid network congestion, and at the same time, it can also improve the data transmission efficiency of the wireless communication module of the client or server.

In a possible implementation manner, the client includes a host and a wireless communication module, the TCP/IP protocol stack is configured on the host, and the TCP/IP protocol stack is obtained through the Transmission Control Protocol/Internet Protocol The fourth packet length sent by the server, and determining the target packet length according to the smaller packet length of the third packet length and the fourth packet length, including: the host based on the The TCP/IP protocol stack sends the second packet length to the server through the wireless communication module; the wireless communication module receives the fourth packet length sent by the server, and communicates with the first packet length. Three packet lengths are compared, and it is determined that the smaller of the third packet length and the fourth packet length is the target packet length; after determining the fourth packet length and the target packet length If the lengths are not equal, the wireless communication module modifies the length of the fourth message to the length of the target message, and sends it to the host.

Understandably, in order to complete the TCP three-way handshake protocol, after the length of the fourth packet is tampered with the length of the target packet and sent to the host, the base station sends the information to the server through the base station. Before sending the first message segment, the method further includes: the host sends the target message length to the server through the wireless communication module based on the TCP/IP protocol stack, so that the client The terminal and the server perform data communication based on the target packet length.

If the TCP/IP protocol stack is not configured in the wireless communication module (it can also be understood that the client and the server are about to perform external services at this time), the wireless communication module does not have the right to control the TCP/IP protocol stack in the host. Handshake data, but the wireless communication module has permission to operate the handshake data received from the server. Therefore, if the TCP/IP protocol stack is not configured in the wireless communication module, the wireless communication module can perform the second handshake in the TCP three-way handshake, after receiving the third message length sent by the server. , determine whether the length of the fourth packet is greater than the length of the third packet, and if so, determine the length of the third packet as the above-mentioned target packet length, and modify the length of the fourth packet received to the third packet The length is reported to the host.

Understandably, the above built-in service and the above-mentioned external service are not supported simultaneously in one client, and one client supports either the built-in service or the external service. Thereby, the programmer can determine to configure the above-mentioned "the wireless communication module sends the third message length to the server through the TCP/IP protocol stack in the client according to the business type supported by the client; the The wireless communication module receives the fourth message length sent by the server through the TCP/IP protocol stack; the wireless communication module determines the length of the third message and the length of the fourth message. The solution logic of the smaller message length is the target message length", or configure the above "the host sends the second message to the server through the wireless communication module based on the TCP/IP protocol stack. The length of the message; the wireless communication module receives the length of the fourth message sent by the server, and compares it with the length of the third message to determine the length of the third message and the length of the fourth message The smaller value is the target message length; when it is determined that the fourth message length is not equal to the target message length, the wireless communication module tampers with the fourth message length into the target message length, and send it to the host" scheme logic.

The data communication method provided by the embodiments of the present application can be applied to built-in services or external services, and has strong adaptability.

In a possible implementation manner, the obtaining the length of the first message sent by the base station includes: obtaining the first maximum transmission unit MTU sent by the base station, according to the formula "first message length=first maximum transmission unit" Transmission unit MTU-IP header length-TCP header length" to calculate the first message length; wherein the first maximum transmission unit MTU is determined by the operator network, and the IP header length and the TCP header length are respectively is the length of the IP header and the length of the TCP header corresponding to the network protocol version configured in the client.

In a possible implementation manner, the obtaining the first maximum transmission unit MTU sent by the base station includes: when the client resides on the network, receiving a packet data network PDN data packet sent by the base station, the The first MTU is included in the PDN data packet.

In a second aspect, the present application provides a data communication device, comprising: a first determination unit, configured to acquire the length of a first packet sent by the base station, and determine the length of the first packet and the length of the second packet The smaller packet length is the third packet length; wherein the first packet length is the maximum data length determined by the operator network, and the second packet length is the maximum data the client expects to receive length; a second determination unit, configured to obtain the fourth message length sent by the server through the Transmission Control Protocol/Internet Protocol TCP/IP protocol stack, and according to the third message length and the fourth message length The smaller message length among the message lengths determines the target message length; wherein, the fourth message length is the maximum data length of the message segment that the server expects to receive; the transceiver unit is used to pass the base station Send a first message segment to the server, where the length of the first message segment is determined based on the length of the target message.

In a third aspect, the present application provides an electronic device, comprising: a memory and a processor, wherein the memory stores program instructions; when the program instructions are executed by the processor, the processor is made to execute the first aspect and the first A method described in any possible implementation of the aspect.

In a fourth aspect, an embodiment of the present application provides a chip system, the chip system is applied to an electronic device, the chip system includes one or more processors, and the processors are configured to invoke computer instructions to cause the electronic device to perform the first aspect or the method shown in any possible implementation manner of the first aspect.

In a fifth aspect, the present application provides a computer-readable storage medium, in which a computer program is stored; when the computer program is run on one or more processors, the electronic device is made to execute the The method described in one aspect and any possible implementation of the first aspect.

In a sixth aspect, the present application provides a computer program product comprising instructions, when the computer program product is run on an electronic device, the electronic device is made to perform the first aspect and any possible implementation manner of the first aspect method described.

It can be understood that the data communication device provided in the second aspect, the electronic device provided in the third aspect, the chip system provided in the fourth aspect, the computer storage medium provided in the fifth aspect, and the computer program product provided in the sixth aspect are all used for Execute the method shown in the first aspect or any implementation manner of the first aspect in the embodiments of the present application. Therefore, for the beneficial effects that can be achieved, reference may be made to the beneficial effects in the corresponding method, which will not be repeated here.

Description of drawings

In order to describe the technical solutions in the embodiments of the present invention more clearly, the accompanying drawings required in the embodiments will be briefly introduced below.

1 is a schematic diagram of the length of a maximum transmission unit embodied in a data frame provided by an embodiment of the present application;

2 is a schematic diagram of the length of the maximum message length embodied in a data frame provided by an embodiment of the present application;

3 is a schematic flowchart of a data communication method provided by an embodiment of the present application;

4A is a schematic diagram of a communication device between a client and a server according to an embodiment of the present application;

4B is a schematic flowchart of another data communication method provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of another data communication method provided by an embodiment of the present application;

6 is a schematic flowchart of another data communication method provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a data communication device according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of still another data communication apparatus provided by an embodiment of the present application.

Detailed ways

The present application will be described in further detail below with reference to the accompanying drawings.

The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to be used as limitations of the present application. As used in the specification of this application and the appended claims, the singular expressions "a," "an," "the," "above," "the," and "the" are intended to also Plural expressions are included unless the context clearly dictates otherwise.

In this application, "at least one (item)" means one or more, "plurality" means two or more, "at least two (item)" means two or three and three In the above, "and/or" is used to describe the relationship of related objects, indicating that there can be three kinds of relationships, for example, "A and/or B" can mean: only A exists, only B exists, and both A and B exist three A case where A and B can be singular or plural. The character "/" generally indicates that the associated objects are an "or" relationship. "At least one of the following" or similar expressions, refers to any combination of these items. For example, at least one (a) of a, b or c, can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c" ".

The embodiment of the present application provides a data communication method. In order to describe the solution of the present application more clearly, some knowledge related to the data communication of the solution is introduced below.

1. Wireless communication module

In the embodiments of the present application, the wireless communication module is a mobile communication module. The mobile communication module can be understood as a cellular communication module, which refers to a functional module of software and hardware for realizing mobile communication functions. For example, the mobile communication module may be a functional module implementing 2G, 3G, 4G or 5G cellular mobile communication technology. Specifically, the mobile communication module can be a modular component that integrates a baseband chip, a radio frequency chip, a memory, a power amplifier device, an antenna interface, and a functional interface on a circuit board, which can realize radio wave transmission and reception, channel noise filtering and other functions. Functions such as mutual conversion between analog signals and digital signals.

The function of the mobile communication module can carry the data interaction between the client and the server (which can also be understood as one terminal device to another terminal device).

2. MTU, MSS

The maximum transmission unit (Maxitum Transmission Unit, MTU) is used to represent the maximum length of network layer data; exemplarily, as shown in Figure 1, the MTU includes the length of the IP header, the length of the TCP header and the length of the IP data in the data frame. The length of the IP data can also be understood as the length of the message segment in the data frame or the length of the data carried in the data frame. Understandably, the above-mentioned data frame may also include other fields except IP data, TCP header, and IP header, which are not limited herein, for example, the first data frame may also include Ethernet header, frame check. Sequence (framecheck sequence, FCS) field

The maximum segment size (Maximum Segment Size, MSS) is used to represent the maximum length of application layer data; exemplarily, as shown in Figure 2, the MSS includes the length of the IP data in the data frame, which can also be understood as the length of the segment. length.

Understandably, in the Ethernet protocol, the data frame may also be referred to as an Ethernet frame or a MAC frame.

Exemplarily, in Internet Protocol version 4 (Internet Protocol version 4, IPV4), the length of the IP header is 20 bytes (byte), and the length of the TCP header is 20 bytes. In Internet Protocol version 6 (Internet Protocol version 6, IPV6), the length of the IP header is 40 bytes, and the length of the TCP header is 20 bytes.

Understandably, two devices with different versions of Internet protocols can communicate with each other through an IPV4/IPV6 dual protocol stack (supporting both IPv4 and IPv6 protocols).

3. TCP three-way handshake

Transmission Control Protocol (TCP)/Internet Protocol (IP), also known as TCP/IP protocol stack, TCP/IP protocol or network communication protocol, is used to implement communication between different networks in the Internet. A general term for communication protocols for information transmission. The TCP/IP protocol stack may include one or more of IP, TCP, ICMP, UDP, TELNET or FTP, and HTTP.

In addition to the TCP/IP protocol, information transmission between networks also requires protocols for implementing data transmission and address encapsulation at the link layer, such as the Ethernet protocol or the 802.3 protocol.

Generally, the MTU supported by the data link of the Ethernet protocol is 1500 bytes. Since MSS is equal to MTU minus the length of the TCP header and then minus the length of the IP header, in IPV4, the MSS supported by the Ethernet protocol is 1460 bytes.

The MTU supported by the data link of the 802.3 protocol is 1492 bytes, so in IPV4, the MSS supported by the 802.3 protocol is 1452.

Generally, if you want the communication between the client and the server to be reliable communication, the TCP/IP protocols configured in the client and the server at least include IP and TCP protocols, where the TCP protocol can be the client and the server. Communication between them provides reliable data transfer.

Before reliable communication between the client and the server through TCP, a TCP three-way handshake should be performed between the client and the server. The TCP three-way handshake is at least used to negotiate the maximum size of the data transmission between the client and the server. text length.

Exemplarily, as shown in Figure 2 below, the three-way handshake between client A and server B includes the following steps:

S201 , the client A sends the synchronization sequence number SYN to the server B, and accordingly, the server B receives the SYN sent by the client A.

The above SYN carries the maximum data length of the segment that client A expects to receive, that is, the above SYN carries the MSS of client A.

Synchronize Sequence Numbers (SYN) is the first handshake signal used by TCP/IP when establishing a connection.

The value of the maximum packet length of the above-mentioned client A is calculated by the MTU sent by the core network when the network is on. Specifically, it is obtained by subtracting the value a from the MTU. The value a is the sum of the length of the TCP header and the length of the IP header. The length of the TCP header and the length of the IP header correspond to the protocol type of the network link configured in client A, respectively. The length of the TCP header and the length of the IP header.

Exemplarily, the network link protocol configured in the client A is the Ethernet protocol, then the MTU received by the core network when the client A resides on the network is 1500 bytes, and the MSS of the client A is obtained after conversion. is 1460 bytes.

Generally, server B receives the SYN sent by client A, and after parsing and obtaining the MSS of client A, compares the MSS of client A with its own MSS, and stores the smaller value as the value of parameter X in the service In terminal B, when server B sends data to client A, it will determine the length of the segment sent to client A according to the value of the parameter X.

S202 , the server B sends a response packet SYN+ACK to the client A, and accordingly, the client A receives the SYN+ACK sent by the server B.

The above SYN+ACK carries the MSS of the segment that the server B expects to receive. The SYN+ACK is the response made by server B after receiving the SYN synchronization sequence number sent by client A, which is used to indicate that server B has received the SYN signaling, and is used to indicate that server B expects to receive the message. The MSS of the text.

Generally, after client A receives the SYN+ACK sent by server B, and parses the MSS of server B, it compares the MSS of server B with its own MSS, and uses the smaller value as the value of parameter Y. Store the data in client A, and then when client A sends data to server B, it will determine the length of the segment sent to server B according to the value of the parameter Y.

S203 , the client A sends a response packet ACK to the server B, and correspondingly, the server B receives the response packet ACK sent by the client A.

The above ACK is a response made by client A after receiving the AYN+ACK sent by server B, which is used to indicate that client A has received the AYN+ACK.

Therefore, according to the above steps S201 to S203, both client A and server B respectively determine the length of the message segment sent by the smaller value of the MSS of the two, which can also be understood as the negotiation between client A and server B. The MSS of the segment sent during communication.

However, using the methods in the above steps S201 to S203, only the MSSs of the client A and the server B are considered, but the operator network (core network) through which the communication between the client A and the server B passes is not considered. MSS. Exemplarily, if the protocol of the data link configured by client A and server B is the Ethernet protocol, and the protocol of the data link of the carrier network through which the communication between client A and server B passes is the 802.3 protocol Then adopt the method in the above-mentioned steps S101 to S103 to determine that the MSS of the message segment that occurs when the client A communicates with the server B is 1460 bytes, and the MSS of the operator network is 1452 bytes, then the client A When sending a data frame to server B according to 1460 bytes for communication, after the data frame reaches the operator network, the operator network needs to fragment the data frame, and after the fragmented data reaches the destination server B, the communication The device also needs to reorganize the fragmented data. The same is true for server B sending a data frame to client A according to 1460 bytes. Therefore, the fragmentation and reassembly of a large number of data packets will cause problems such as low utilization of network resources, waste of processing resources of the central processing unit (CPU) and network bandwidth resources, and even cause network congestion, and will also reduce the wireless communication module. data transmission efficiency.

It can be understood that the data length (for example, MSS or MTU) described in the embodiments of this application can also be understood as the size of the data volume. Exemplarily, the maximum packet length is 1460 bytes, which can also be understood as the payload or IP in the data frame. The size of the data amount of data is 1460 bytes.

Example 1:

The following describes the data communication method provided by the embodiment of the present application with reference to FIG. 3 .

As shown in Figure 3, the data communication method includes:

S301, the client obtains the length of the first packet sent by the base station, and determines that the length of the smaller of the length of the first packet and the length of the second packet is the third packet length.

In this embodiment of the present application, the above-mentioned first packet length is the maximum data length (Maximum Segment Size, MSS) determined by the operator network. The length of the second message is the MSS of the message segment expected to be received by the client.

It is understandable that the above-mentioned operator network is the mobile communication network operator used by the client, such as a mobile operator network, a China Unicom operator network or a telecom operator network. The entire operator network may contain one or more base stations and one or more core network devices.

In a possible implementation manner, obtaining the first message length sent by the base station as described above specifically includes: obtaining the first maximum transmission unit MTU sent by the base station, according to the formula "first message length=first maximum transmission unit" MTU-IP header length-TCP header length" calculates the first message length; wherein the first maximum transmission unit MTU is determined by the operator network, and the IP header length and the TCP header length are respectively the same as The length of the IP header and the length of the TCP header corresponding to the network protocol version configured in the client.

In a possible implementation manner, obtaining the first maximum transmission unit MTU sent by the base station specifically includes: when the client resides on the network, receiving Packet Data Network (PDN) data sent by the base station The above-mentioned first maximum transmission unit (Maximum Transmission Unit, MTU) is included in the above-mentioned PDN data packet.

It is understandable that the above-mentioned first packet length is the maximum data length determined by the operator's network, and it can also be understood that the above-mentioned first packet length is determined by the above-mentioned first MTU by the operator's network. Specifically: the above-mentioned first packet length is determined by the first MTU configured for the client by the operator network. The operator network will send a PDN data packet to the client through the core network and the base station when the client resides on the network and the base station, and the PDN data packet includes the first MTU. The client then calculates the above-mentioned first packet length according to the first MTU and the conversion formula between the first MTU and the MSS. The first packet length can also be understood as an MSS value configured by the operator network for the client, and when the operator network communicates with the client, the operator network does not need an MSS value for segmented transmission of the packet. That is to say, the length of the first segment is only the MSS value configured for the client by the operator network according to the requirements, and cannot represent the maximum MSS value supported by the operator network. The length of the first segment can also be supported by the operator network. The MSS value that is larger than the length of the first packet is not limited in this document.

In this embodiment of the present application, the above-mentioned second packet length is the maximum data length of the packet segment that the above-mentioned client itself expects to receive (ie, the MSS of the client).

S302, obtain the fourth packet length sent by the server through the Transmission Control Protocol/Internet Protocol TCP/IP protocol stack, and determine the target according to the smaller packet length of the third packet length and the fourth packet length Packet length.

Exemplarily, when the client performs the second TCP handshake in the TCP three-way handshake with the server based on the TCP/IP protocol stack, the client receives the fourth packet length sent by the server.

Exemplarily, the protocol configured in the operator network for implementing link layer data transmission and address encapsulation with the client is the 802.3 protocol, the first MTU received by the client from the base station is 1492 bytes, and the base station If the version of the network protocol configured with the client is IPV4, the value of the above-mentioned first packet length is (1492-20-20) bytes=1452 bytes. The protocol configured in the client to realize the data transmission and address encapsulation of the link layer is the Ethernet protocol, then the MTU of the client itself is 1500 bytes, that is, the value of the above-mentioned second packet length is (1500-20 -20) bytes = 1500 bytes. If the protocol configured by the server to implement data transmission and address encapsulation at the link layer is also an Ethernet protocol, the MTU of the server is 1500 bytes, that is, the value of the fourth packet length above is (1500-20- 20) bytes = 1500 bytes. Therefore, the minimum packet length among the first packet length (1452 bytes), the second packet length (1500 bytes) and the fourth packet length (1500 bytes) is the first packet length, and it is determined that The above-mentioned first packet length is the above-mentioned target packet length.

Exemplarily, if the minimum packet length among the above-mentioned first packet length, second packet length and fourth packet length is the first packet length, then it is determined that the first packet length is the above-mentioned target packet length . If the minimum packet length among the first packet length, the second packet length, and the fourth packet length is the second packet length, the second packet length is determined to be the above-mentioned target packet length. If the minimum packet length among the first packet length, the second packet length, and the fourth packet length is the fourth packet length, the fourth packet length is determined to be the above-mentioned target packet length.

Generally, the Internet protocol version of the base station or the core network that communicates with the base station has at least one Internet protocol version that is consistent with the Internet protocol version of the device accessing the base station. For example, the Internet protocol version of the base station is IPV4/IPV6, and the Internet protocol version of the client accessing the base station is IPV4. At this time, the communication between the base station and the client is based on the Internet protocol version supported by the client. That is to say, in this case, after the client receives the MTU sent by the base station, the length of the first packet is calculated based on the length of the IP header and the length of the TCP header defined in IPV4.

S303: Send a first segment to the server through the base station, where the length of the first segment is determined based on the length of the target message.

Exemplarily, the above-mentioned client sends the first message segment to the server, specifically, the application layer in the above-mentioned client sends the above-mentioned first message segment to the network layer in the client; the network layer is based on the first message. segment, TCP header, and IP header determine the data packet sent to the data link layer; the client's data link layer then forms a first data frame according to the first segment, TCP header, IP header and Ethernet header, and via The physical layer sends the first data frame to the server. The first data frame includes the first segment, and the length of the first segment in the first data frame is consistent with the length of the target segment.

It is understandable that the above-mentioned first data frame may also include other fields except the first message segment, the TCP header, the IP header and the Ethernet header, which are not limited in this paper. A frame check sequence (FCS) field may be included.

Exemplarily, the above-mentioned client includes a host and a wireless communication module, and the above-mentioned steps S301-S303 may be performed by the host and the wireless communication module in the client in cooperation. For example, step S301 may be executed by the wireless communication module; step S302 may be executed by the wireless communication module to obtain the length of the fourth message sent by the server through the transmission control protocol/network interconnection protocol TCP/IP protocol stack, and the length of the fourth message sent by the wireless communication module may be executed by the wireless communication module. The group or the host performs step S302 to determine the target message length according to the smaller message length of the third message length and the fourth message length; the host performs step S303 through the wireless communication module.

Therefore, the client sends data to the server for communication according to the above target message length. After the data is transmitted to the operator's network (base station or core network), the operator's network will no longer fragment the data, and the data arrives at the server. Afterwards, there is no need to perform reorganization processing, thereby improving the utilization rate of network resources, saving CPU processing resources and network broadband resources, avoiding network congestion, and improving the data transmission efficiency of the wireless communication module.

It is understandable that when the above-mentioned client is the above-mentioned wireless communication module, the method provided by the embodiment of the present application can make the wireless communication module not only serve as a data transmission tool, but also intelligently process some services (for example, determine the above-mentioned target). packet length services) to save network resources and help improve the data service processing capability of the entire network.

In this embodiment of the present application, the client may obtain the above-mentioned first packet length through the following two obtaining methods.

1. When the client is on the network, after acquiring (receiving) the first MTU, and before detecting the trigger instruction that triggers the client and the server to perform the TCP three-way handshake, the above-mentioned first packet length can be calculated.

Specifically, the above-mentioned obtaining the first MTU specifically includes: when the above-mentioned client resides on the network, receiving a packet data network PDN data packet sent by the above-mentioned base station, where the PDN data packet includes the above-mentioned first MTU; The difference of the first value is used as the length of the first message, which specifically includes: before the trigger instruction is detected, calculating the difference between the first MTU and the first value to obtain the above-mentioned first message length, and the trigger instruction is used for Instructs the client to perform a three-way TCP handshake with the server.

Exemplarily, after the client is powered on, the process of staying on the network is performed. Specifically, the process of staying on the network can be that the client sends a request to the base station corresponding to cell A. If the base station does not store the MTU information corresponding to the client, the base station reports the request to the core network, and the core network sends the request to the core network. The base station sends an attach message about the client. It is understandable that the above attach message is sent by the core network to the client through the base station. Generally, as long as the core network accessed by the client is not changed, even if the client changes the cell, the core network will not send it to the client again. The attach message.

Exemplarily, the above triggering instruction is triggered based on a mobile communication service, for example, the mobile communication service may be a service such as dialing up, browsing a web page, or downloading data.

Generally, the process of the client staying on the network is called attach. After the client sends an on-network request to the core network through the base station, the core network sends an attach message to the client in response to the on-network request. The attach message It includes a Packet Data Network (PDN) container, the PDN container includes a Protocol Configuration Options (PCO), and the PCO includes an MTU field, which is used to indicate that the operator network expects to receive The sum of the length of the TCP header, the length of the IP header, and the length of the segment in the data frame. After receiving the attach message, the client obtains the MTU field included in the PCO, and uses the value of the MTU field as the value of the first MTU, so that the client obtains the first MTU.

Understandably, the communication between the client and the core network may pass through one or more base stations, which is not limited herein.

2. The client may also store the first MTU after obtaining the first MTU. After the client detects the trigger instruction, the client reads the stored first MTU, and calculates the first packet length according to the first MTU.

Specifically, the above-mentioned obtaining the first MTU specifically includes: when the client resides on the network, receiving a packet data network PDN data packet sent by the core network, where the PDN data packet includes the above-mentioned first MTU; storing the first MTU; The difference between the first MTU and the first numerical value is used as the length of the first message, which specifically includes: after detecting the trigger instruction, calculating the difference between the first MTU and the first numerical value according to the stored first MTU, and obtaining The first packet length, the trigger instruction is used to trigger the client and the server to perform a TCP three-way handshake.

It is understandable that the data communication method provided by the embodiment of the present application may be executed by the client, and the data communication method provided by the embodiment of the present application may be executed by the server in cooperation with the client. The above steps S301 to S303 execute the data communication method provided by the embodiment of the present application.

Exemplarily, while the client side executes the data communication method provided by the embodiment of the present application, the server side may also simultaneously execute the data communication method provided by the embodiment of the present application.

Exemplarily, the base station in which the client communicates with the server through the base station is the first base station, and the operator network in which the first packet length is the maximum data length determined by the operator network is the first operator network. In the case where the client and the server simultaneously execute the data communication method provided by the embodiment of the present application, the above-mentioned fourth packet length is the maximum data length of the packet segment expected to be received by the server, specifically including: the above-mentioned fourth packet length is the smaller of the maximum data length of the message segment that the server expects to receive and the length of the fifth message sent by the second base station to the server, and the server sends to the client through the second base station data for data communication, and the fifth packet length is the maximum data length determined by the second operator network. Understandably, the first base station may be a set of one or more base stations, the second base station may also be a set of one or more base stations, and the first base station and the second base station may include one or more identical base stations. , which is not limited in this paper.

Example 2:

In the embodiment of the present application, the above-mentioned client includes a host and a wireless communication module, the above-mentioned TCP/IP protocol stack is configured in the above-mentioned wireless communication module, and in the above-mentioned step S302, the transmission control protocol/network interconnection protocol TCP/IP protocol stack is used. Obtaining the fourth packet length sent by the server, and determining the target packet length according to the smaller packet length of the third packet length and the fourth packet length, including: the wireless communication module passing the The TCP/IP protocol stack sends the third packet length to the server; the wireless communication module receives the fourth packet length sent by the server through the TCP/IP protocol stack; the wireless communication module receives the fourth packet length sent by the server through the TCP/IP protocol stack; The wireless communication module determines that the smaller message length of the third message length and the fourth message length is the target message length. The above wireless communication module is a wireless communication module.

Exemplarily, a schematic diagram of a communication device between a client and a server is shown in FIG. 4A . Understandably, the TCP/IP protocol stack is configured in the wireless communication module, and the wireless communication module triggers the process of performing the TCP three-way handshake with the server. Exemplarily, the above-mentioned host may also be understood as an application processor at the application layer, and the wireless communication module may also be understood as a baseband processor. In the scenario where the TCP/IP protocol stack is configured in the wireless communication module, when the host in the client runs the target software program (for example, software programs such as files need to be downloaded through mobile communication), the host sends a request to the wireless communication module with After the server communicates with the instruction, the wireless communication module triggers the three-way handshake process between the client and the server, and the wireless communication module and the server complete the TCP three-way handshake process.

Specifically, another data communication method provided by an embodiment of the present application is described in detail below with reference to FIG. 4B in a scenario where a TCP/IP protocol stack is configured in a wireless communication module.

As shown in Figure 4B, the data communication method includes the following steps:

S401, the wireless communication module obtains the length of the first packet sent by the base station.

For the specific description of how the wireless communication module obtains the first packet length, reference may be made to the relevant descriptions of other embodiments herein, for example, the relevant descriptions of the client acquiring the first packet length in the above step S301, which will not be described in detail here.

S402, the wireless communication module determines that the smaller one of the first packet length and the second packet length is the third packet length.

In the embodiment of the present application, the above-mentioned second packet length is the maximum data length of the packet segment expected to be received by the client (ie, the MSS of the client).

S403, the wireless communication module sends the above-mentioned third packet length to the server, and accordingly, the server receives the third packet length.

Specifically, when the wireless communication module detects the trigger command for performing the TCP three-way handshake with the server, it sends a SYN packet to the server to perform the first handshake in the TCP three-way handshake, and the SYN packet carries the above-mentioned three-way handshake. The third packet length. For the relevant description of the TCP three-way handshake and the SYN message, reference may be made to the relevant descriptions of other embodiments of the present application, which will not be described in detail here.

S404, the wireless communication module receives the fourth packet length sent by the server.

In the embodiment of the present application, the fourth packet length is the maximum data length of the packet segment expected to be received by the server (ie, the MSS of the server).

Specifically, after the server receives the SYN message containing the length of the third message sent by the client, the server responds to the SYN message and sends a response message SYN+ACK message to the client to perform TCP three times The second handshake in the handshake, wherein the SYN+ACK message includes the above-mentioned fourth message length.

S405 , the wireless communication module determines that the smaller one of the third packet length and the fourth packet length is the target packet length.

Specifically, after receiving the SYN+ACK message sent by the server, and analysing the length of the fourth message, the wireless communication module determines to use the smaller of the third message length and the fourth message length. The message length is used as the message length for communication with the server (that is, the above-mentioned target message length).

S406, the wireless communication module sends an ACK response message to the server.

In a possible implementation manner, after the above-mentioned step S405 (the wireless communication module determines that the smaller one of the above-mentioned third packet length and the above-mentioned fourth packet length is the above-mentioned target packet length), step S406 Before (the wireless communication module sends the first message segment to the server through the base station), the wireless communication module sends the target message length to the server through the TCP/IP protocol stack, so that all The client and the server perform data communication based on the target message length.

Exemplarily, in order to complete the TCP three-way handshake to ensure that the communication between the client and the server is reliable communication, the client sends an ACK response message to the server before normal communication with the server, and the ACK message is sent to the server. The message includes the above target message length.

S407, the wireless communication module sends a first message segment to the server through the base station, and the length of the first message segment is determined based on the length of the target message.

Example 3:

In the embodiment of the present application, the above-mentioned client includes a host and a wireless communication module, the above-mentioned TCP/IP protocol stack is configured on the above-mentioned host, and in the above-mentioned step S302, the server is obtained through the Transmission Control Protocol/Internet Protocol TCP/IP protocol stack The length of the fourth packet sent, and determining the target packet length according to the smaller packet length of the third packet length and the fourth packet length, including: the host passing through the TCP/IP protocol stack based on The wireless communication module sends the second message length to the server; the wireless communication module receives the fourth message length sent by the server, and compares it with the third message length, Determining that the smaller of the third packet length and the fourth packet length is the target packet length; if it is determined that the fourth packet length is not equal to the target packet length , the wireless communication module modifies the fourth message length to the target message length, and sends it to the host (that is, sending the tampered fourth message length to the host).

The smaller value of the third packet length and the fourth packet length determined above is the target packet length; when it is determined that the fourth packet length is not equal to the target packet length , the length of the fourth packet is tampered with the length of the target packet, and sent to the host, or it may be: in the case that the length of the third packet is determined to be less than the length of the fourth packet , the wireless communication module tampers with the length of the fourth message to the length of the third message, and sends the length of the fourth message after the tampering to the host; the host receives the length of the fourth message after the tampering length, and determine that the length of the tampered fourth message is the length of the target message; when it is determined that the length of the third message is greater than the length of the fourth message, the wireless communication module will The fourth packet length is sent to the host; the host receives the fourth packet length, and determines that the fourth packet length is the target packet length.

Specifically, an embodiment of the present application provides another data communication method in a scenario where the TCP/IP protocol stack is configured in the wireless communication module in detail with reference to FIG. 5 .

As shown in Figure 5, the data communication method includes the following steps:

S501, the wireless communication module obtains the length of the first packet sent by the base station.

For the specific description of how the wireless communication module obtains the first packet length, reference may be made to the relevant descriptions of other embodiments herein (eg, the relevant description of the client acquiring the first packet length in the above step S301 ), which will not be described in detail here.

S502, the wireless communication module determines that the smaller one of the first packet length and the second packet length is the third packet length.

In the embodiment of the present application, the above-mentioned second packet length is the maximum data length of the packet segment expected to be received by the client (ie, the MSS of the client).

S503, the host sends the above-mentioned second message length to the server through the wireless communication module.

In the embodiment of the present application, the above-mentioned second packet length is the maximum data length of the packet segment expected to be received by the client (ie, the MSS of the client).

Specifically, after the host detects the trigger command for performing the TCP three-way handshake with the server, it sends a SYN message to the server through the wireless communication module to perform the first handshake in the TCP three-way handshake, wherein the SYN Carry the above-mentioned second packet length.

S504, the wireless communication module receives the fourth packet length sent by the server.

In the embodiment of the present application, the fourth packet length is the maximum data length of the packet segment expected to be received by the server (ie, the MSS of the server).

Specifically, after the server receives the SYN message containing the above-mentioned second message length sent by the client, the server responds to the SYN message and sends a response message SYN+ACK message to the client to perform TCP three times. The second handshake in the handshake, wherein the SYN+ACK message includes the above-mentioned fourth message length.

S505, the wireless communication module compares the length of the fourth packet with the length of the third packet, and determines that the smaller of the length of the third packet and the length of the fourth packet is the target packet length.

Specifically, after receiving the above-mentioned SYN+ACK message sent by the server, the wireless communication module in the client parses the SYN+ACK message to obtain the above-mentioned fourth message length; Four packet lengths are compared. And determine the smaller of the third packet length and the fourth packet length as the target packet length.

S506, in the case where it is determined that the length of the fourth packet is not equal to the length of the target packet, the wireless communication module tampers with the length of the fourth packet to the length of the target packet, and tampered with the fourth packet The length is sent to the above host.

Specifically, after the wireless communication module parses the SYN+ACK packet to obtain the length of the fourth packet, and determines that the length of the fourth packet is not equal to the length of the target packet, the SYN+ACK packet is The fourth message length in is tampered with the above target message length, and the tampered SYN+ACK message is sent to the above host.

S507, the host sends an ACK response message to the server through the wireless communication module.

After the above-mentioned step S506 (the wireless communication module tampers with the above-mentioned fourth packet length to the above-mentioned target packet length, and sends the tampered fourth packet length to the above-mentioned host), the step S508 (the host through the wireless communication module Before sending the first message segment to the server), the method further includes: the host sends the target message length to the server through the wireless communication module based on the TCP/IP protocol stack, to The client and the server are made to perform data communication based on the target message length.

Exemplarily, in order to complete the TCP three-way handshake to ensure that the communication between the client and the server is reliable communication, the client sends an ACK response message to the server before normal communication with the server, and the ACK message is sent to the server. The message includes the above target message length.

S508, the host sends a first message segment to the server through the wireless communication module, and the length of the first message segment is determined based on the above-mentioned target message length.

Understandably, in the TCP three-way handshake, the packets (such as SYN packets and ACK packets) sent by the client to the server are sent to the client by the transport layer in the TCP/IP protocol stack configured in the client. The wireless communication module of the physical layer sends it, and then the wireless communication module sends it to the server. If the TCP/IP protocol stack is configured in the wireless communication module (it can also be understood that the client and the server are about to carry out built-in services), as shown in the above step S403, the wireless communication module can determine the SYN in the TCP/IP protocol stack. For the data carried in the message (that is, the SYN message carries the above-mentioned third message length), the wireless communication module can send the above-mentioned third message length to the server during the first handshake of the TCP three-way handshake. Or, as shown in the above steps S504 to S506, after the wireless communication module performs the second handshake with the server and receives the above-mentioned SYN+ACK message containing the fourth message length, if it is determined that the fourth message length is greater than the above-mentioned For the third packet length, the packet length included in the SYN+ACK packet is modified to the above-mentioned third packet length.

If the TCP/IP protocol stack is not configured in the wireless communication module (it can also be understood that the client and the server are about to perform external services), the wireless communication module does not have the right to modify the data sent by the transport layer (that is, the host). The TCP three-way handshake protocol stipulates that in the first handshake, the length of the packet sent by the client to the server is the length of the second packet corresponding to the client. Therefore, as shown in the above steps S504 to S506, only after the client receives the above-mentioned fourth packet length sent by the server in the second handshake, if it is determined that the fourth packet length is greater than the above-mentioned third packet length, it will The message length included in the SYN+ACK message is modified to the above-mentioned third message length.

It is understandable that the above built-in service (the TCP/IP protocol stack is configured in the wireless communication module) and the above-mentioned external service (the TCP/IP protocol stack is configured in the wireless communication module) will not be supported at the same time in the same client. external), either built-in services or external services are supported in the same client. Therefore, the programmer can determine to configure one of the methods of steps S401 to S407 or the methods of steps S501 to S508 in the client according to the service type supported by the client. Exemplarily, when the programmer determines that the type of service supported by the client is a built-in service, the method shown in the above steps S401 to S407 may only be configured in the client; or, the above may be configured only in the client. The methods shown in steps S501 to S508. Exemplarily, when the program designer determines that the type of service supported by the client is an external service, the method shown in the above steps S501 to S508 may only be configured in the client.

Example 4:

Optionally, in some implementations, in the above step S302 (obtaining the fourth message length sent by the server through the Transmission Control Protocol/Internet Protocol TCP/IP protocol stack, and according to the third message length and the Before determining the target message length with the smaller message length among the four message lengths), the data communication method provided by the present application further includes: determining whether the transmission control protocol/network interconnection protocol TCP/IP protocol stack configured in the client is located in the wireless In the communication module; the above-mentioned step S302 specifically includes: when it is determined that the above-mentioned TCP/IP protocol stack configured in the client is located in the above-mentioned wireless communication module, the wireless communication module passes the TCP/IP protocol stack. sending the third message length to the server; the wireless communication module receives the fourth message length sent by the server through the TCP/IP protocol stack; the wireless communication module determines The smaller packet length of the third packet length and the fourth packet length is the target packet length. In the case where it is determined that the TCP/IP protocol stack configured in the client is not located in the wireless communication module, the host sends the information to the server through the wireless communication module based on the TCP/IP protocol stack. the length of the second message; the wireless communication module receives the length of the fourth message sent by the server, and compares it with the length of the third message to determine the length of the third message and the length of the fourth message The smaller value of the message length is the target message length; when it is determined that the fourth message length is not equal to the target message length, the wireless communication module sends the fourth message length to the target message length. The length of the message is tampered with the length of the target message, and sent to the host.

That is to say, the core processing flow of the methods shown in the above steps S401 to S407 and the above steps S501 to S508 may also be configured in one client at the same time.

Specifically, after the above step S401 or S501 and before S402 or S502, the method further includes: determining the type of service supported by the client; when it is determined that the type of service supported by the client is a built-in service, the client executes steps S402 to S407; When it is determined that the service type supported by the client is an external service, the client executes steps S502 to S508.

Specifically, in the following, taking the first packet length as the minimum packet length among the above-mentioned first packet length, second packet length, and fourth packet length as an example, the embodiments of the present application are described in detail with reference to FIG. 6 to provide yet another method. a data communication method.

For a detailed description of the first packet length, the second packet length, and the fourth packet length, reference may be made to the related descriptions of other embodiments herein, which are not described in detail here.

As shown in Figure 6, the data communication method includes the following steps:

S601, the client receives the packet data network PDN data packet.

For the description of the PDN data packet, reference may be made to the relevant descriptions of other embodiments in this document (for example, the relevant descriptions of the PDN container in Embodiment 1), which will not be described in detail here.

S602, the client parses the PDN data packet to obtain the MTU field in the protocol configuration option PCO.

For the description of the MTU field in the PCO, reference may be made to the relevant descriptions of other embodiments in this document (for example, the relevant description of the MTU field in the PCO in Embodiment 1), which will not be described in detail here.

S603, the client calculates and obtains the first MSS according to the MTU field.

S604, the client determines the service type supported by itself.

S605, in the case where it is determined that the service type supported by the client is a built-in service, the client performs a three-way handshake using the above-mentioned first MSS obtained by calculation.

In this embodiment of the present application, the length of the first packet is smaller than the length of the second packet in the client, and when it is determined that the service type supported by the client is a built-in service, the client uses the MTU to calculate the first The MSS (that is, the first packet length) performs the first handshake in the three-way handshake. It can also be understood that, in the case where it is determined that the service type supported by the client is a built-in service, the client performs the above steps S402 to S407.

S606, in the case of determining the external service of the service type supported by the client, the client monitors the SYN+ACK message, and changes the MSS carried by the server during the TCP negotiation to the above-mentioned first MSS.

In the embodiment of the present application, the length of the first packet is smaller than the length of the second packet in the above-mentioned server, and in the case that the service type supported by the client is determined to be a built-in service, the client monitors the SYN+ACK packet, and the TCP During negotiation, the MSS carried by the other party is tampered with the above-mentioned first MSS. It can also be understood that, in the case where it is determined that the service type supported by the client terminal is an external service, the client terminal performs the above steps S502 to S507.

S607, the client sends data to the server by using the first MSS.

In this embodiment of the present application, the first packet length is the minimum packet length among the above-mentioned first packet length, second packet length, and third packet length, and the first packet segment sent by the client to the server The length of is determined based on the above-mentioned first MSS (which can also be understood as the length of the target message described in other embodiments).

The data communication apparatus provided by the embodiments of the present invention will be introduced below.

Please refer to FIG. 7 , which is a schematic structural diagram of a data communication apparatus according to an embodiment of the present invention. As shown in FIG. 7 , the data communication apparatus according to the embodiment of the present invention may include:

The first determining unit 701 is configured to obtain the length of the first message sent by the base station, and determine the smaller message length of the first message length and the second message length as the third message length; One message length is the maximum data length determined by the operator network, and the above-mentioned second message length is the maximum data length of the message segment that the above-mentioned client expects to receive;

The second determining unit 702 is configured to obtain the length of the fourth packet sent by the server through the Transmission Control Protocol/Internet Protocol TCP/IP protocol stack, and determine the length of the fourth packet according to the smaller of the length of the third packet and the length of the fourth packet. The message length determines the target message length; wherein, the above-mentioned fourth message length is the maximum data length of the message segment that the above-mentioned server expects to receive;

The transceiver unit 703 is configured to send a first segment to the server through the base station, where the length of the first segment is determined based on the length of the target message.

In a possible implementation manner, the above-mentioned second determining unit 702 is specifically configured to send the third packet length to the server through the transceiver unit 703 based on the TCP/IP protocol stack; receive the third packet length through the transceiver unit 703 The fourth packet length sent by the server, and determining the smaller packet length of the third packet length and the fourth packet length as the target packet length.

In a possible implementation manner, the above-mentioned transceiver unit 703 is further configured to send the target packet length to the server through the TCP/IP protocol stack, so that the client and the server are based on the The target message length is specified for data communication.

In a possible implementation manner, the above-mentioned second determining unit 702 is specifically configured to send the second packet length to the server through the transceiver unit 703 based on the TCP/IP protocol stack; receive through the transceiver unit 703 the length of the fourth message sent by the server; and comparing with the length of the third message, and determining that the smaller of the length of the third message and the length of the fourth message is the target message message length; in the case that it is determined that the length of the fourth message is not equal to the length of the target message, the length of the fourth message is tampered with the length of the target message, and sent to the host.

In a possible implementation manner, as shown in FIG. 8 , the above-mentioned first determining unit 701 is specifically configured to obtain the first maximum transmission unit MTU sent by the above-mentioned base station, according to the formula “first packet length=first maximum transmission unit MTU-IP Header Length-TCP Header Length" calculates the above-mentioned first packet length.

In a possible implementation manner, the above-mentioned first determining unit 701 is specifically configured to receive the packet data network PDN data packet sent by the above-mentioned base station when the above-mentioned client terminal resides on the network.

For the explanation of terms such as the first MTU, the length of the IP header, the length of the TCP header, and the PDN data packet, reference may be made to the related descriptions of other embodiments in this document, which will not be described in detail here.

It should be noted that, for the specific execution process, reference may be made to the specific descriptions of the method embodiments shown in FIG. 3 to FIG. 6 , which will not be repeated here.

It is understandable that the data communication device shown in FIG. 7 can have various product forms. Exemplarily, the data communication apparatus may also be a data communication apparatus of a processor, a communication interface, a memory, and a communication bus as shown in FIG. 8 . Specifically, as shown in FIG. 8 , the data communication device 80 may include:

At least one processor 801 , eg a CPU, at least one communication interface 803 , memory 804 , at least one communication bus 802 . Among them, the communication bus 802 is used to realize the connection and communication between these components. Optionally, the communication interface 803 may include a standard wired interface, a wireless interface (such as a WI-FI interface or a Bluetooth interface, etc.). The memory 804 may be high-speed RAM memory or non-volatile memory, such as at least one disk memory. The memory 804 can optionally also be at least one storage device located away from the aforementioned processor 801 . As shown in FIG. 8, the memory 804, which is a computer storage medium, may include an operating system and program instructions.

Exemplarily, the processor 801 may be configured to implement the steps or functions performed by the first determining unit 701, the second determining unit 702, and the like. The communication interface 803 may be used to implement steps or functions performed by the transceiver unit 703 . Exemplarily, the communication interface 803 may correspond to a pin in a chip or a transceiver.

For example, the above-mentioned first MTU sent by the base station is received by the above-mentioned communication interface 803, and the above-mentioned first MTU is sent by the above-mentioned communication interface 803 to the processor 801, and the processor 801 calculates the value of the above-mentioned first packet length according to the formula.

In this embodiment of the present application, the client includes a host and a wireless communication module.

In the scenario where the TCP/IP protocol stack is configured in the wireless communication module, the wireless communication module may include the above-mentioned processor 801 and the above-mentioned communication interface 803; the wireless communication module may also include one or more memories ; The host may include a processor and one or more memories, which are not limited herein.

In the scenario where the TCP/IP protocol stack is not configured in the wireless communication module, the above-mentioned host may include the above-mentioned processor 801 and one or more memories; the wireless communication module may not include a processor, and the wireless communication module The above-mentioned communication interface 803 and one or more memories may be included.

In the data communication device 80 shown in FIG. 8 , the processor 801 may be configured to load the program instructions stored in the memory 804, and specifically perform the following operations:

Obtain the length of the first packet sent by the base station, and determine that the smaller of the first packet length and the second packet length is the third packet length; wherein the first packet length is the operator network The determined maximum data length, the above-mentioned second message length is the maximum data length of the message segment that the above-mentioned client expects to receive;

Obtain the length of the fourth packet sent by the server through the Transmission Control Protocol/Internet Protocol TCP/IP protocol stack, and determine the target packet according to the smaller of the length of the third packet and the length of the fourth packet. Length; wherein, the above-mentioned fourth message length is the maximum data length of the message segment that the above-mentioned server expects to receive;

The base station sends the first message segment to the server, and the length of the first message segment is determined based on the length of the target message.

It should be noted that, for the specific execution process, reference may be made to the specific descriptions of the embodiments shown in FIG. 3 to FIG. 6 , which will not be repeated here.

An embodiment of the present invention further provides a computer storage medium, where the computer storage medium can store a plurality of instructions, and the above-mentioned instructions are suitable for being loaded by a processor and executing the method steps of the above-mentioned embodiments shown in FIG. 3 to FIG. 6 , For the specific execution process, reference may be made to the specific descriptions of the embodiments shown in FIG. 3 to FIG. 6 , which will not be repeated here.

As used in the above embodiments, the term "when" may be interpreted to mean "if" or "after" or "in response to determining..." or "in response to detecting..." depending on the context. Similarly, depending on the context, the phrases "in determining..." or "if detecting (the stated condition or event)" can be interpreted to mean "if determining..." or "in response to determining..." or "on detecting (the stated condition or event)" or "in response to the detection of (the stated condition or event)".

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can 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 program instructions are loaded and executed on a computer, all or part of the processes or functions according to the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from a website site, computer, server or data center through Transmission to another website site, computer, server or data center by wired (eg coaxial cable, optical fiber, digital subscriber line) or wireless (eg infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer, or a data storage device such as a server, a data center, etc. that includes one or more available media integrated. The available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state drives), and the like.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented. The process can be completed by instructing the relevant hardware by a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed , which may include the processes of the foregoing method embodiments. The aforementioned storage medium includes: ROM or random storage memory RAM, magnetic disk or optical disk and other mediums that can store program codes.

Claims (10)

1. A data communication method, applied to a client, wherein the client is wirelessly connected to a server through a base station, the method comprising:

acquiring a first message length sent by the base station, and determining the smaller message length in the first message length and the second message length as a third message length; the first message length is the maximum data length determined by an operator network, and the second message length is the maximum data length of a message segment expected to be received by the client;

acquiring a fourth message length sent by the server through a transmission control protocol/internet protocol (TCP/IP) stack, and determining a target message length according to the smaller message length of the third message length and the fourth message length; the fourth message length is the maximum data length of a message segment expected to be received by the server;

and sending a first message segment to the server through the base station, wherein the length of the first message segment is determined based on the target message length.

2. The method according to claim 1, wherein the client includes a host and a wireless communication module, the TCP/IP protocol stack is configured in the wireless communication module, and the obtaining a fourth packet length sent by the server through a TCP/IP protocol stack and determining a target packet length according to a smaller packet length of the third packet length and the fourth packet length includes:

the wireless communication module sends the third message length to the server through the TCP/IP protocol stack;

the wireless communication module receives the length of the fourth message sent by the server through the TCP/IP protocol stack;

and the wireless communication module determines the smaller message length in the third message length and the fourth message length as the target message length.

3. The method of claim 2, wherein after the wireless communication module determines that the smaller of the third packet length and the fourth packet length is the target packet length, before the first segment is sent to the server through the base station, the method further comprises:

and the wireless communication module sends the target message length to the server through the TCP/IP protocol stack, so that the client and the server perform data communication based on the target message length.

4. The method according to claim 1, wherein the client includes a host and a wireless communication module, the TCP/IP protocol stack is configured in the host, the obtaining a fourth packet length sent by the server through a TCP/IP protocol stack according to a transmission control protocol/internet protocol, and determining a target packet length according to a smaller packet length of the third packet length and the fourth packet length includes:

the host sends the second message length to the server through the wireless communication module based on the TCP/IP protocol stack;

the wireless communication module receives the length of the fourth message sent by the server, compares the length of the fourth message with the length of the third message, and determines the smaller value of the length of the third message and the length of the fourth message as the length of the target message;

and under the condition that the fourth message length is determined to be unequal to the target message length, the wireless communication module is used for modifying the fourth message length into the target message length and sending the target message length to the host.

5. The method of claim 4, wherein after the tampering the fourth packet length to the target packet length and sending the tamped fourth packet length to the host, before sending, by the base station, the first segment to the server, the method further comprises:

and the host sends the target message length to the server through the wireless communication module based on the TCP/IP protocol stack, so that the client and the server perform data communication based on the target message length.

6. The method according to any of claims 1-5, wherein said obtaining the first message length sent by the base station comprises:

acquiring a first Maximum Transmission Unit (MTU) sent by the base station, and calculating the first message length according to a formula of the first message length which is the first maximum transmission unit (MTU-IP) header length-TCP header length; wherein the first MTU is determined by the operator network, and the IP header length and the TCP header length are an IP header length and a TCP header length, respectively, corresponding to a network protocol version configured in the client.

7. The method of claim 6, wherein the obtaining the first MTU sent by the base station comprises:

and when the client side is resident in the network, receiving a Packet Data Network (PDN) data packet sent by the base station, wherein the PDN data packet comprises the first MTU.

8. A data communication apparatus, comprising:

a first determining unit, configured to obtain a first message length sent by the base station, and determine a smaller message length of the first message length and the second message length as a third message length; the first message length is the maximum data length determined by an operator network, and the second message length is the maximum data length expected to be received by the client;

a second determining unit, configured to obtain a fourth packet length sent by the server through a TCP/IP stack, and determine a target packet length according to a smaller packet length of the third packet length and the fourth packet length; the fourth message length is the maximum data length of a message segment expected to be received by the server;

and the receiving and sending unit is used for sending a first message segment to the server through the base station, and the length of the first message segment is determined based on the length of the target message.

9. An electronic device, comprising: a memory, a processor, wherein the memory stores program instructions; the program instructions, when executed by the processor, cause the processor to perform the method of any of claims 1-7.

10. A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium; the computer program, when run on one or more processors, performs the method of any one of claims 1-7.

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