CN103475596A - MTU (Maximum Transmission Unit)-based middleware and mobile terminal data transmission method and system - Google Patents
MTU (Maximum Transmission Unit)-based middleware and mobile terminal data transmission method and system Download PDFInfo
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Abstract
The invention provides an MTU (Maximum Transmission Unit)-based middleware and mobile terminal data transmission method and system, wherein the method comprises the steps of inquiring the MTU value of a transmission path according to a data transmission request of a mobile terminal; if the MTU value of the transmission path is not inquired, preventing data package fragment in the transmission path, and acquiring the MTU value of the transmission path according to the MTU value defaulted by the data packet; carrying out data transmission between a middleware and the mobile terminal according to the acquired MTU value of the transmission path; if the MTU value of the transmission path is inquired, carrying out data transmission between the middleware and the mobile terminal according to the inquired MTU value of the transmission path. Through the MTU-based middleware and mobile terminal data transmission method and system, the fragment cannot be performed on the data packet in the transmission process, the data transmission efficiency can be increased, the page showing speed of a browser client side is further increased, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of mobile terminal data communication, in particular to a method and a system for data transmission between a middleware and a mobile terminal based on an MTU (maximum Transmission Unit) value.
Background
The path MTU (Maximum Transmission Unit) is defined as the minimum of the Maximum Transmission units of all IP (Internet protocol) hops on the "path" that pass from the source address to the destination address. MTU values of various devices on a network are not set according to a uniform standard, the MTU values of the devices are not fixed, if MTU values of all connections are set according to the uniform standard, the efficiency of data transmission in a region with a smaller MTU of some paths is reduced, for example, a maximum data unit transmitted by a certain tcp (transmission control protocol) connection exceeds the MTU value of the path, a data packet is fragmented, and the fragmentation of the data packet causes the reduction of the efficiency of data transmission, thereby affecting the data transmission speed of a mobile terminal and a middleware.
In order to solve the above problems, the existing solutions are as follows: the packet network equipment adjusts the MSS parameter value of the maximum transmission unit carried in the Transmission Control Protocol (TCP) connection message between the terminal and the server according to a preset MSS parameter threshold value, and sends out the adjusted TCP connection message; the terminal or the server obtains the length of the maximum message segment supported by the terminal through MSS parameters carried in the TCP connection message, compares the length with the length of the maximum message segment supported by the terminal, and selects a smaller value to perform segmented processing on TCP transmission data. By adjusting the MSS parameter value, the length of the data packet between the terminal and the server which are transmitted between the packet network devices and encapsulated by using the tunnel protocol is not larger than the path MTU (maximum transmission unit) between the packet network devices, so that the IP packet fragmentation between the packet network devices can be reduced, the time delay of data packet processing is reduced, and the processing capability of the packet device is improved.
However, the above-described solution has the following problems: before adjusting the MSS parameter value of the maximum transmission unit carried in the TCP connection message of the transmission control protocol between the terminal and the server according to the preset MSS parameter threshold value, the data packet is fragmented, thereby reducing the data transmission effect.
Therefore, a new method for data transmission between middleware and a mobile terminal is needed.
Disclosure of Invention
In view of the foregoing problems, an object of the present invention is to provide a method and a system for data transmission between a middleware and a mobile terminal based on an MTU value, so as to solve the problem that a data packet is fragmented during transmission.
The invention provides a data transmission method of a middleware and a mobile terminal based on an MTU value, which comprises the following steps:
inquiring a path MTU value of a transmission path according to a data transmission request of the mobile terminal;
if the path MTU value of the transmission path is not inquired, the data packet fragmentation in the transmission path is forbidden, and the path MTU value of the transmission path is obtained according to the default MTU value of the data packet;
and carrying out data transmission between the middleware and the mobile terminal according to the acquired path MTU value of the transmission path.
In another aspect, the present invention further provides a data transmission system between a middleware and a mobile terminal based on an MTU value, including:
the path MTU value query module is used for querying the path MTU value of the transmission path according to the data transmission request of the mobile terminal;
the path MTU value acquisition module is used for prohibiting the data packet fragmentation in the transmission path when the path MTU value of the transmission path is not inquired by the path MTU value inquiry module, and acquiring the path MTU value of the transmission path according to the MTU value of the data packet;
and the data transmission module is used for carrying out data transmission between the middleware and the mobile terminal according to the acquired path MTU value of the transmission path.
By using the method and the system for performing data transmission between the middleware and the mobile terminal based on the MTU value detection provided by the invention, the IP header flag for sending the data packet is set as the forbidden fragmentation, the MTU value of the equipment in the transmission path is compared with the default MTU value of the data packet, if the MTU value of the equipment is smaller than the default MTU value of the data packet, the equipment discards the data packet, returns an ICMP data packet carrying the MTU value of the equipment, and takes the MTU value of the equipment as the path MTU value of the transmission path, so that the data packet can be ensured not to be fragmented in the transmission process, the data transmission efficiency is improved, the page displaying speed of the browser client is accelerated, and the user experience is improved.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 is a flowchart illustrating a data transmission method between a mobile terminal and middleware based on MTU values according to the present invention;
fig. 2 is a data transmission flow between the middleware and the mobile terminal based on the MTU value according to an embodiment of the present invention;
fig. 3 is a link diagram of a data transmission method between middleware and a mobile terminal based on an MTU value according to an embodiment of the present invention;
fig. 4 is a data interaction flowchart of a data transmission method between the middleware and the mobile terminal based on the MTU value according to an embodiment of the present invention;
fig. 5 is a block diagram of a data transmission system of a middleware and a mobile terminal based on an MTU value according to the present invention.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Aiming at the problem that a data packet is fragmented in the transmission process, the invention sets an IP header mark for sending the data packet as a forbidden fragmentation (DF), compares an MTU value of a device in a transmission path with a default MTU value of the data packet, discards the data packet by a device with the MTU value smaller than that of the current data packet on the transmission path, returns an ICMP (Internet Control MessageProtocol) data packet to a middleware and carries the MTU value of the device, allows the middleware to adjust the size of the data packet according to the MTU value of the device, and ensures that the size of the data packet of the middleware is equal to or smaller than the MTU value of the device; therefore, the data packets are prevented from being fragmented in the transmission process, and the data transmission efficiency is improved.
Since the mobile phone is mainly used as a mobile internet carrier at present, in the following description of the embodiments of the present invention, "mobile terminal" and "mobile phone" both refer to a target carrier used by a user to access the mobile internet, and "mobile phone" can be understood as a specific representation of "mobile terminal", but not as a unique representation.
The "middleware" used in the description of the embodiments of the present invention may be a server, or may be a separate system software or service program. For convenience of description, the server will be taken as the middleware in the following embodiments.
Fig. 1 shows a flow of a data transmission method between middleware and a mobile terminal based on an MTU value according to the present invention.
As shown in fig. 1, when the mobile phone sends a Web page request to the middleware, the server queries a path MTU value of the transmission path according to the request of the mobile phone (step S110); if the path MTU value of the transmission path is not inquired, the server forbids the data packet fragmentation in the transmission path and acquires the path MTU value of the transmission path according to the default MTU value of the data packet (step S120); after the path MTU value of the transmission path is obtained, in step S130, the server performs data transmission with the mobile phone according to the obtained path MTU value of the transmission path.
To describe the MTU value-based middleware and mobile terminal data transmission method in more detail, fig. 2 shows a data transmission flow between the MTU value-based middleware and the mobile terminal according to an embodiment of the present invention.
As shown in fig. 2, the data transmission method between the middleware and the mobile terminal based on the MTU value according to the present invention includes:
s210: the server waits for a connection.
S220: the mobile phone is connected with the server and requests the Web page.
S230: the server judges whether the position of the mobile phone is changed.
The mobile phone position can be judged according to the standard that whether the city where the mobile phone is located changes, if the mobile phone is located in different cities of the same city, the position where the mobile phone of the server belongs does not change, and if the mobile phone is brought to another city from the city where the mobile phone is located, the server judges that the position where the mobile phone belongs changes.
S240: if the position of the mobile phone is changed or the mobile phone is newly accessed, the server sets a path MTU detection mark.
S250: if the position of the mobile phone is not changed, inquiring the previous path MTU value of the mobile phone, and if the previous path MTU value of the mobile phone is not inquired, setting a path MTU detection mark by the server; if the previous path MTU value of the mobile phone is inquired, the previous path MTU value of the mobile phone is set as the MTU value of the current TCP connection.
It should be noted that, since the server sends the data packet to the mobile phone according to the request of the Web page of the mobile phone and returns the data packet to the mobile phone, the MTU value of the current TCP connection is the MTU value of the data packet in the transmission path, and the default MTU value of the server is used as the initial value of the MTU value of the data packet in the transmission path.
S260: it is detected whether the path MTU detection flag is set, and if the path MTU detection flag is set, step S270 is performed, and if the path MTU detection flag is not set, step S290 is performed.
S270: starting a path MTU detection process, wherein the path MTU detection process compares an MTU value of a device in a transmission path with a default MTU value of a data packet by setting an IP header flag of the data packet to be a forbidden Fragment (DF), the device with the MTU value smaller than the MTU value of the current data packet on the path discards the data packet, returns an ICMP (Internet control Message protocol) data packet to a server and carries the MTU value of the device, and the server adjusts the MTU value of the data packet to be sent according to the MTU value of the device, so that the MTU value of the data packet to be sent by the server is equal to or smaller than the MTU value of the device.
That is, the returned device MTU value is taken as the MTU value of the packet to be transmitted by the server, that is, the returned device MTU value is taken as the path MTU value of the transmission path.
In the process of comparing the MTU value of the equipment in the transmission path with the default MTU value of the data packet, if the MTU value on the path is larger than the MTU value of the current data packet, the current data packet can pass through the equipment, and the path MTU detection process detects whether the MTU value of the next equipment in the transmission path is smaller than the MTU value of the current data packet.
S280: the path MTU value (the probe result of the path MTU probe process) found in the step S270 is written into the database.
S290: and the server performs data interaction with the mobile phone by inquiring the path MTU value stored in the database.
To further illustrate the data transmission method between the middleware based on MTU value and the mobile terminal provided by the present invention, fig. 3 shows a link of the data transmission method between the middleware based on MTU value and the mobile terminal according to an embodiment of the present invention.
As shown in fig. 3, the embodiment of the present invention has three links in total from the left server to the right handset, where the three links are:
the first link is: server-PATH _ B-handset;
the second link is as follows: server-PATH _ C-handset;
the third link: server-PATH _ a-handset.
Wherein, the path MTU value of the first link is 1200; the path MTU value of the second link is 1500; the path MTU value for the third link is 1400.
Since most existing TCP connections of the server are transmitted by using the default MTU value (1500) of the ethernet, the server according to the embodiment of the present invention uses 1500 as the MTU value of the server, and the PATH MTU values of the first link (PATH _ B) and the third link (PATH _ a) are 1200 and 1400, respectively, so that the data packet will be fragmented by the devices on the first link (PATH _ B) and the third link (PATH _ a) through the first link (PATH _ B) and the third link (PATH _ a), if the real-time PATH MTU detection mechanism is enabled, that is, the PATH MTU detection process is started by setting the PATH MTU detection flag, and the detection result is written into the database, the maximum transmission unit of the TCP connection between the server and the handset does not exceed 1200, the data packet passing through all PATHs will not be fragmented, and the data transmission efficiency will be improved.
To describe the path MTU detection mechanism in more detail, fig. 4 shows a data interaction flow of a method for middleware and handset data transmission based on MTU value detection according to an embodiment of the present invention.
As shown in fig. 4, the server sends a packet using the system default MTU value 1500, but the MTU value of some devices R1 on the path is 1400 (the path MTU value is 1400), the path MTU detection process started by the server compares the MTU value of the device R2 on the path with the received packet value, and finds that the MTU value 1400 of the device R1 is smaller than the MTU value 1500 of the current packet, the device R1 checks the flag of the packet, if it finds that the detection flag indicates that fragmentation is prohibited, discards the packet, returns an ICMP (Internet Control Message Protocol) packet to the server and carries the MTU value 1400 of the device R1, which indicates that the sender needs to adjust the size of the packet to 1400 for reception, and after receiving, records the detection value to the database as the MTU value 1400, and then sends only the subsequent packet with the size not larger than 1400.
According to the above data interaction process, the server can also receive the ICMP packet returned by the device R2 on the path and carry the MTU value 1200 of the device R2, and since the path MTU value stored in the current server database is 1400, the server will update the path MTU value of the database, record the new path MTU value (the detection value of the path MTU detection process) 1200 in the database, and record that the database is the MTU value 1200, and then only send the packet with the size not larger than 1200 subsequently. And circulating the flow until the data packet sent by the server reaches the mobile phone, wherein the data packet sent by the server cannot be fragmented in the process of transmitting from the server side to the mobile phone side.
Corresponding to the method, the invention also provides a middleware based on the MTU value and a data transmission system of the mobile terminal. Fig. 5 shows a logical structure of a data transmission system of the middleware based on the MTU value and the mobile terminal according to the present invention.
As shown in fig. 5, the system 500 for middleware and mobile phone data transmission based on MTU value detection according to the present invention includes a path MTU value query module 510, a path MTU value acquisition module 520, and a data transmission module 530.
The path MTU value query module 510 is configured to query a path MTU value of a transmission path according to a data transmission request of the mobile terminal; the path MTU value obtaining module 520 is configured to prohibit fragmentation of the data packet in the transmission path when the path MTU value query module 510 does not query the path MTU value of the transmission path, and obtain the path MTU value of the transmission path according to the MTU value of the data packet; the data transmission module 530 is configured to perform data transmission between the middleware and the mobile terminal according to the obtained path MTU value of the transmission path.
In an embodiment of the present invention, the system 500 for middleware and handset data transmission based on MTU value detection further includes a mobile terminal location detection module (not shown) for determining whether the location of the mobile terminal changes; if the position of the mobile terminal is changed, the path MTU value acquisition module forbids the data packet fragmentation in the transmission path and acquires the path MTU value of the transmission path according to the default MTU value of the data packet; if the position of the mobile terminal is not changed, inquiring a path MTU value set by the mobile terminal, and if the path MTU value set by the mobile terminal is not inquired, the path MTU value acquisition module forbids data packet fragmentation in a transmission path and acquires the path MTU value of the transmission path according to the default MTU value of the data packet; and if the path MTU value set by the mobile terminal is inquired, setting the path MTU value set by the mobile terminal as the path MTU value of the transmission path.
In addition, in another embodiment of the present invention, the path MTU value obtaining module 520 further includes a path MTU probing flag setting unit (not shown) and a path MTU probing process starting unit (not shown).
The path MTU detection mark setting unit is used for setting a path MTU detection mark; the path MTU detection process starting unit is used for starting the path MTU detection process. Setting an IP header mark for sending a data packet as a forbidden fragment in a path MTU detection process, comparing an MTU value of equipment in a transmission path with an MTU value of the data packet, if the MTU value of the equipment in the transmission path is smaller than the MTU value of the data packet, discarding the data packet by the equipment, returning an ICMP data packet carrying the MTU value of the equipment, and taking the MTU value of the equipment as the path MTU value of the transmission path.
If the path MTU value query module 510 queries the path MTU value of the transmission path, the data transmission module 530 performs data transmission between the middleware and the mobile terminal according to the queried path MTU value of the transmission path.
Furthermore, in another embodiment of the present invention, the data transmission module 530 may further include a path MTU value recording unit (not shown) for writing the obtained path MTU value of the transmission path into the database after obtaining the path MTU value of the transmission path; the data transmission module 530 performs data transmission between the middleware and the mobile terminal according to a path MTU value of a transmission path written in the database.
According to the method and the system for transmitting the middleware and the mobile phone data based on the MTU value detection, the path MTU value on the link is detected in real time, the maximum transmission unit of the TCP connection is dynamically adjusted, fragmentation of a data packet is avoided, the data transmission efficiency of the middleware and the mobile terminal is improved, the webpage display speed is increased, and the user experience is improved.
The method and system for middleware and handset data transmission based on MTU value detection according to the present invention are described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various modifications can be made to the method and system for middleware and handset data transmission based on MTU value detection of the present invention without departing from the scope of the present invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.
Claims (10)
1. The data transmission method of the middleware and the mobile terminal based on the MTU value comprises the following steps:
inquiring a path MTU value of a transmission path according to a data transmission request of the mobile terminal;
if the path MTU value of the transmission path is not inquired, the data packet fragmentation in the transmission path is forbidden, and the path MTU value of the transmission path is obtained according to the default MTU value of the data packet;
and carrying out data transmission between the middleware and the mobile terminal according to the acquired path MTU value of the transmission path.
2. The MTU-value-based middleware and mobile terminal data transmission method according to claim 1, wherein after the step of inquiring the path MTU value of the transmission path according to the data transmission request of the mobile terminal, comprising: judging whether the position of the mobile terminal is changed;
if the position of the mobile terminal is changed, the step of forbidding the data packet fragmentation in the transmission path and acquiring the path MTU value of the transmission path according to the default MTU value of the data packet is carried out;
if the position of the mobile terminal is not changed, inquiring a path MTU value set by the mobile terminal, if the path MTU value set by the mobile terminal is not inquired, carrying out data packet fragmentation in the transmission-forbidden path, and acquiring the path MTU value of the transmission path according to the default MTU value of the data packet; and if the path MTU value set by the mobile terminal is inquired, setting the path MTU value set by the mobile terminal as the path MTU value of the transmission path.
3. The MTU-value-based data transmission method between middleware and a mobile terminal according to claim 2, wherein the step of prohibiting packet fragmentation in a transmission path and obtaining the path MTU value of the transmission path according to the default MTU value of the packet comprises:
starting a path MTU detection process by setting a path MTU detection mark; wherein,
setting an IP header mark for sending a data packet as a forbidden fragment in the path MTU detection process; and,
and comparing the MTU value of the equipment in the transmission path with the default MTU value of the data packet, if the MTU value of the equipment is smaller than the default MTU value of the data packet, discarding the data packet by the equipment, returning an ICMP data packet carrying the MTU value of the equipment, and taking the MTU value of the equipment as the path MTU value of the transmission path.
4. The MTU-value-based middleware and mobile terminal data transmission method according to claim 1, wherein in the step of inquiring the path MTU value of the transmission path according to the data transmission request of the mobile terminal, if the path MTU value of the transmission path is inquired, data transmission is directly performed between the middleware and the mobile terminal according to the path MTU value of the transmission path.
5. The MTU value-based middleware and mobile terminal data transmission method according to any one of claims 1 to 4, wherein after the step of obtaining the path MTU value of the transmission path, the MTU value-based middleware comprises:
writing the obtained path MTU value of the transmission path into a database; and the number of the first and second groups,
and carrying out data transmission between the middleware and the mobile terminal according to the path MTU value of the transmission path written by the database.
6. A data transmission system between middleware and a mobile terminal based on an MTU value, comprising:
the path MTU value query module is used for querying the path MTU value of the transmission path according to the data transmission request of the mobile terminal;
a path MTU value obtaining module, configured to prohibit fragmentation of a data packet in a transmission path when the path MTU value of the transmission path is not queried by the path MTU value querying module, and obtain the path MTU value of the transmission path according to the MTU value of the data packet;
and the data transmission module is used for carrying out data transmission between the middleware and the mobile terminal according to the acquired path MTU value of the transmission path.
7. The MTU-value-based middleware and mobile terminal data transmission system according to claim 6, further comprising:
the mobile terminal position detection module is used for judging whether the position of the mobile terminal is changed; wherein,
if the position of the mobile terminal is changed, the path MTU value acquisition module forbids the data packet fragmentation in the transmission path and acquires the path MTU value of the transmission path according to the default MTU value of the data packet;
if the position of the mobile terminal is not changed, inquiring a path MTU value set by the mobile terminal, if the path MTU value set by the mobile terminal is not inquired, prohibiting the data packet fragmentation in the transmission path by a path MTU value acquisition module, and acquiring the path MTU value of the transmission path according to the default MTU value of the data packet; and if the path MTU value set by the mobile terminal is inquired, setting the path MTU value set by the mobile terminal as the path MTU value of the transmission path.
8. The MTU-value-based middleware and mobile terminal data transmission system according to claim 7, wherein the path MTU-value obtaining module comprises:
a path MTU detection flag setting unit for setting a path MTU detection flag;
the path MTU detection process starting unit is used for starting a path MTU detection process; setting an IP header flag of a sending data packet as a forbidden fragment in the path MTU detection process, comparing an MTU value of equipment in a transmission path with an MTU value of the data packet, if the MTU value of the equipment is smaller than the MTU value of the data packet, discarding the data packet by the equipment, returning an ICMP data packet carrying the MTU value of the equipment, and taking the MTU value of the equipment as the path MTU value of the transmission path.
9. The MTU value-based middleware and mobile terminal data transmission system according to claim 6, wherein,
when a path MTU value query module queries a path MTU value of a transmission path according to a data transmission request of a mobile terminal, if the path MTU value query module queries the path MTU value of the transmission path, the data transmission module transmits data between the middleware and the mobile terminal according to the queried path MTU value of the transmission path.
10. The MTU value-based middleware and mobile terminal data transmission system according to any one of claims 6 to 9,
the data transmission module comprises a path MTU value recording unit, and is used for writing the obtained path MTU value of the transmission path into a database after the path MTU value of the transmission path is obtained;
and the data transmission module carries out data transmission between the middleware and the mobile terminal according to the path MTU value of the transmission path written in the database.
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| CN106789717A (en) * | 2016-12-26 | 2017-05-31 | 广东欧珀移动通信有限公司 | Dynamic adjusts method, device and the terminal of the MTU of communication protocol data message transmission |
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| CN102594505A (en) * | 2012-02-08 | 2012-07-18 | 华为技术有限公司 | Data transmission method and device |
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| CN106330706A (en) * | 2015-07-01 | 2017-01-11 | 中兴通讯股份有限公司 | Method and device for acquiring device interface MRU (Maximum Receive Unit) value |
| CN106789717A (en) * | 2016-12-26 | 2017-05-31 | 广东欧珀移动通信有限公司 | Dynamic adjusts method, device and the terminal of the MTU of communication protocol data message transmission |
| CN106789717B (en) * | 2016-12-26 | 2019-08-16 | Oppo广东移动通信有限公司 | The method, apparatus and terminal of the MTU of dynamic adjustment communication protocol data message transmission |
| CN114697269A (en) * | 2022-03-15 | 2022-07-01 | 深圳市广和通无线股份有限公司 | Data communication method, apparatus, device and medium |
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