CN102710501B - A kind of mobile terminal and the Bandwidth Dynamic method of adjustment under tunnel communication pattern thereof - Google Patents

Abstract

The present invention provides a mobile terminal and its bandwidth dynamic adjustment method in the tunnel communication mode. The mobile terminal adopts an embedded system based on the Linux kernel, including a tunnel communication module and a QOS module; the tunnel communication module is used for According to the tunnel communication protocol, the data packets of different protocols to be transmitted through the tunnel are re-encapsulated; the QOS module is used to perform flow control processing on the data packets processed by the tunnel communication module according to preset rule parameters. In the embodiment of the present invention, a QOS module is added to the traditional communication terminal, and the support function of the QOS module to the tunnel communication mode is added. The user only needs to configure the QOS parameters through the interface, and the QOS module can be used to control the data in the tunnel communication mode. Flow control is carried out to realize the dynamic adjustment of bandwidth and improve the utilization rate of network resources.

Description

A mobile terminal and its dynamic bandwidth adjustment method in tunnel communication mode

technical field

The invention relates to the field of communication terminals and the field of embedded technology, in particular to a mobile terminal and its dynamic bandwidth adjustment method in tunnel communication mode.

Background technique

With the popularity of the Internet, the relationship between the network and people's lives is getting closer, and diversified services (data, voice, video, etc.) have emerged as the times require. Different businesses have different requirements for communication conditions. Usually, data services are discrete and require very high reliability of service delivery. The bit error rate is the most important indicator, but a certain delay can be tolerated; while voice and video services have large traffic, continuity, Due to the characteristics of real-time and correlation, time delay will cause voice change, pitch change and video mosaic, so the requirements for transmission delay and jitter are very strict. Traditional IP networks can only provide "best-effort" services. All business flows compete fairly for network resources, and it is difficult to guarantee the communication requirements of each type of business. This is the essential reason for the study of IP QoS. Almost all countries have proposed to solve the end-to-end QoS problem in the next generation network when deploying NGN implementation requirements.

QOS, that is, IP Quality of Service, refers to the performance of IP packets or flows passing through the network. This performance is described by a series of measurable parameters to provide end-to-end service quality assurance and improve network resource utilization.

QOS is widely used in the field of communication terminals, including the field of embedded technology. Embedded system is an application-centric, computer-based computer system with tailorable software and hardware, which meets the strict requirements of the application system on function, reliability, cost, volume, and power consumption. With the development of information technology and the popularization of digital products, the combination of embedded system application and Internet is getting closer.

Tunneling is a way of passing data between networks through the internetwork infrastructure. The data transmitted through the tunnel can be data frames or packets of different protocols. The tunnel protocol re-encapsulates the data frames or packets of these other protocols in a new packet header and sends them. The encapsulated data packets pass between the two endpoints of the tunnel. The public Internet network does the routing, and once it reaches the end of the network, the data is unpacked and forwarded to the final destination. During the entire transmission process, the logical path through which the encapsulated data packets are transmitted on the public Internet is called a tunnel. In short, tunnel technology refers to the whole process including data encapsulation, transmission and unpacking.

To sum up, although the QOS technology has been widely applied to communication terminals, the communication terminals cannot dynamically adjust traffic in a custom tunnel communication mode. However, many communication terminals need to control their tunnel communication, so it is necessary to propose a solution that can dynamically adjust the bandwidth in the tunnel communication mode.

Contents of the invention

The purpose of the present invention is to provide a mobile terminal and its dynamic bandwidth adjustment method in the tunnel communication mode, to realize the control of the data flow in the embedded system based on the Linux kernel in the tunnel communication mode, and to improve the utilization rate of network resources.

The purpose of the present invention is achieved through the following technical solutions.

A kind of communication terminal, adopts the embedded system based on Linux kernel, comprises tunnel communication module, also comprises QOS module;

The tunnel communication module is used to re-encapsulate data packets of different protocols to be transmitted through the tunnel according to the tunnel communication protocol;

The QOS module is used to perform flow control processing on the data packets processed by the tunnel communication module according to preset rule parameters.

Wherein, the QOS module further includes:

The data packet identification module is used to identify the received data packets, screen out the tunnel mode data packets and send them to the QOS implementation module for processing;

The QOS configuration module is used to set the currently adopted QOS rules and specific rule parameter information through the API configuration function;

The QOS implementation module is used to control the flow of data packets in the tunnel mode according to the rule parameter information configured by the QOS configuration module.

Wherein, communication terminal also comprises system interface, is used for providing the configuration interface of man-machine interaction, receives the configuration information that user inputs and transmits it to described QOS configuration module.

Wherein, the system interface adopts a WEB module.

A method for dynamically adjusting the bandwidth of a mobile terminal in a tunnel communication mode, comprising the following steps:

Configure the currently adopted QOS rules and specific rule parameter information through the QOS configuration module;

After the tunnel connection is established between the communication terminal and other communication terminals, the tunnel communication module first performs tunnel encapsulation processing on the data packets to be transmitted through the tunnel, and the QOS implementation module performs flow control on the data packets according to the configuration information before sending to the opposite end.

Wherein, the process of performing flow control by the QOS implementation module specifically includes:

Identify the received data packets according to the characteristics of the tunnel mode, and filter out the data packets in the tunnel mode;

Obtain the header length information of the filtered data packets from the tunnel communication module, and calculate the total length of each data packet;

Flow control is performed on the data packets in the tunnel mode according to the total length of each data packet and pre-configured rule information.

Wherein, the QOS implementation module controls the data packets through the 'ebtable' command or the 'iptable' command.

Among them, the specific rule parameter information is dynamically configured into the currently adopted QOS rule through the system command 'tc'.

Compared with the prior art, the embodiments of the present invention have the following beneficial effects.

In the embodiment of the present invention, a QOS module is added to the traditional communication terminal, and the support function of the QOS module to the tunnel communication mode is added. The user only needs to configure the QOS parameters through the interface, and the QOS module can be used to control the data in the tunnel communication mode. Packet flow control, so as to realize the dynamic adjustment of bandwidth and improve the utilization of network resources.

Description of drawings

FIG. 1 is a schematic structural diagram of a tunnel communication system in an embodiment of the present invention.

Fig. 2 is a flowchart of a method for dynamically adjusting bandwidth in tunnel communication mode in an embodiment of the present invention.

Detailed ways

The core idea of the present invention is: use the QOS module to control the flow of the tunnel. On the client side of the communication terminal, such as through the web page, set the traffic based on the tunnel on the predetermined input interface; after the WEB module in the embedded system receives this command, it passes the request message to the QOS module for further processing. For data processing, the QOS module will judge the data type of the current communication and identify whether the current packet is a tunnel. If it is a tunnel mode data packet, it will obtain the header length information to calculate the total length of the data packet for accurate data processing. flow control.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In this embodiment, as shown in FIG. 1 , the entire communication system is composed of a communication terminal a and a communication terminal b, and the communication terminal a and the communication terminal b perform tunnel communication.

Among them, the communication terminal a adopts an embedded system based on the Linux kernel, which mainly includes the following contents.

The tunnel communication module is used for re-encapsulating data frames or packets of different protocols to be transmitted through the tunnel according to the tunnel communication protocol.

The WEB module is used to provide a human-computer interaction interface.

The QOS module is composed of a data packet identification module, a QOS configuration module and a QOS implementation module.

Wherein, the data packet identification module is used for identifying the received data packet, judging whether it is a data packet of tunnel communication, and if so, sending it to the QOS implementation module for processing.

The QOS configuration module is used to set the currently adopted QOS rules and specific rule parameter information through the external API configuration function. It can usually be connected with the WEB module to achieve the effect of configuration through the page.

The QOS implementation module is used to control the data flow of the tunnel communication according to the rule parameter information configured by the QOS configuration module.

As shown in FIG. 2 , the bandwidth dynamic adjustment method in the tunnel communication mode in this embodiment includes steps.

201. A tunnel connection is initiated between communication terminals, and the connection protocol may be a public protocol or a self-defined communication protocol. After the connection is completed, the communication between the communication terminals is normal.

202. Configure currently adopted QOS rules, such as htb rules, through a configuration interface.

203. According to the configured QOS rule, configure specific parameter information, that is, a data rate. In this step, the configuration parameters can be dynamically configured into the HTB rules through the system command "tc".

204. Send the configuration information to the QOS implementation module through the system interface, and at this time, the QOS mode takes effect officially.

205. The tunnel communication module encapsulates and processes the data packets to be communicated and sends them to the QOS implementation module, and at the same time notifies the QOS implementation module of the packet header length information of each data packet.

206. The QOS implementation module identifies the received data packets according to the characteristics of the tunnel mode, and screens out the data packets in the tunnel mode. Generally, data packets in tunnel mode are transmitted in UDP mode, and include IPV4 and IPV6, so whether the current data packet is a UDP data packet can be used as a basis to judge whether the data packet is a data packet in tunnel mode, and can be further distinguished IPV4 and IPV6 are output to facilitate subsequent processing.

207. For the data packets in the tunnel mode, the QOS implementation module calculates the entire data length of the data packets according to the packet header information, and then controls each data packet according to the rule information configured above. In this step, the QOS implementation module can control the data flow through the command 'ebtable' or 'iptable'.

In the above process, because the tunnel mode data packet will encapsulate one more data packet header than the ordinary data packet, this data packet header contains some signs and variables used by the tunnel protocol; and the accuracy of the total length of the obtained data packet determines Therefore, the QOS implementation module needs to obtain the length information of the data packet header from the tunnel communication module before processing the tunnel mode data packet, and calculate the accurate total length of the data packet accordingly, so as to ensure the bandwidth control. Accuracy.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (6)

1. a communication terminal, adopts the embedded system based on linux kernel, comprises tunnel communication module, it is characterized in that, also comprises QOS module:

Described tunnel communication module, carries out Reseal process for treating according to Tunneling Protocol by the packet of the different agreement of tunnel transmission;

QOS module, for carrying out flow control process according to the parameter of regularity preset to the packet after tunnel communication module process;

Described QOS module comprises further:

Identification of data packets module, for identifying received packet, filter out tunnel mode packet and send it to QOS implement module process;

QOS configuration module, for arranging the QOS rule of current employing and concrete parameter of regularity information by API configuration function;

QOS implements module, for the packet header length information of the packet of tunnel mode filtered out according to described identification of data packets module, calculate the total length of each packet, and according to the total length of each packet calculated and the parameter of regularity information of described QOS configuration module configuration, flow control is carried out to the packet of tunnel mode.

2. communication terminal as claimed in claim 1, it is characterized in that, this communication terminal also comprises system interface, and for providing the configuration interface of man-machine interaction, the configuration information receiving user's input also transmits it to described QOS configuration module.

3. communication terminal as claimed in claim 2, is characterized in that, described system interface adopts WEB module.

4. the Bandwidth Dynamic method of adjustment of mobile terminal under tunnel communication pattern, it is characterized in that, the method comprising the steps of:

The QOS rule of current employing and concrete parameter of regularity information is configured by QOS configuration module;

Set up after tunnel is connected between this communication terminal with other communication terminals, tunnel communication module is treated the packet transmitted by tunnel and is first carried out tunnel encapsulation process, and QOS implements to be sent to opposite end after module carries out flow control according to described configuration information to described packet again;

The process that described QOS enforcement module carries out flow control specifically comprises:

Feature according to tunnel mode identifies received packet, filters out the packet of tunnel mode;

Obtain the packet header length information of the packet filtered out from tunnel communication module, calculate the total length of each packet;

According to the total length of each packet and pre-configured Rule Information, flow control is carried out to the packet of described tunnel mode.

5. the Bandwidth Dynamic method of adjustment of mobile terminal under tunnel communication pattern as claimed in claim 4, is characterized in that, in the method, described QOS implements module to be ordered by ' ebtable ' order or ' iptable ' and control packet.

6. the Bandwidth Dynamic method of adjustment of mobile terminal under tunnel communication pattern as claimed in claim 4, be is characterized in that, in the method, concrete parameter of regularity information be configured to dynamically in the QOS rule of current employing by system command ' tc '.