KR100748312B1 - Method for transmitting application traffic to secure traffic Quality of Service in a wide use terminal - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method for transmitting application traffic for guaranteeing service quality in a general purpose terminal.

2. The technical problem to be solved by the invention

According to the present invention, the priority of application traffic generated as an application is activated is checked, and the application traffic having a high priority is transmitted through a network stack based on the layer 2 tunneling protocol after being authenticated, and a low priority is transmitted. Application traffic is transmitted through transmission control protocol / Internet protocol based network stack to transmit application traffic for service quality guarantee in general purpose terminal to efficiently classify application traffic that should guarantee service quality in broadband communication network. It is an object of the present invention to provide a computer-readable recording medium recording a method and a program for realizing the method.

3. Summary of Solution to Invention

According to an aspect of the present invention, there is provided a method of transmitting application traffic for guaranteeing a service quality in a general-purpose terminal, comprising: an application program storing step of storing an application program having a priority; A priority checking step of confirming whether one application has a high priority as it is activated to generate application traffic; A first application transmission step of transmitting the application traffic through a network stack based on a transmission control protocol / Internet protocol if it has a low priority; And a second application transmission step of transmitting the application traffic through a network stack based on the two-layer tunneling protocol through an authentication process if it has a high priority as a result of the checking.

4. Important uses of the invention

The present invention is used for general purpose terminals.

General Purpose Terminals, Layer 2 Tunneling Protocol, Network Stack, Priority, Application Traffic, Quality of Service

Description

Method for transmitting application traffic to secure traffic Quality of Service in a wide use terminal}             

1 is a diagram illustrating an embodiment of a method for transmitting application traffic in a conventional general-purpose terminal;

2 is a diagram illustrating an embodiment of a network stack of a general-purpose terminal according to the present invention;

3 is a diagram illustrating an embodiment of an application traffic transmission method of a general-purpose terminal according to the present invention;

4A to 4G are structural diagrams of an embodiment of application traffic according to the present invention;

5 is a flowchart illustrating an embodiment of an authentication procedure according to the present invention;

6 is a flowchart illustrating a method for transmitting application traffic for guaranteeing service quality in a general purpose terminal according to the present invention.

* Explanation of symbols for the main parts of the drawings                 

21: universal terminal 22: router

23: network server (LNS)

The present invention relates to a method of transmitting application traffic for guaranteeing a quality of service in a general-purpose terminal and a computer-readable recording medium recording a program for realizing the method. More specifically, the application traffic generated as the application is activated. Application traffic with high priority is checked through the 2nd layer tunneling protocol based network stack after verifying the priority of the network, and application traffic with low priority is transmitted through the transmission control protocol / Internet protocol based network stack. The present invention relates to a method for transmitting application traffic for guaranteeing a quality of service in a general-purpose terminal and a computer-readable recording medium having recorded thereon a program for realizing the method.

There are various service terminals in a broadband convergence network (BcN).

In particular, services required by general-purpose terminals such as personal computers (PCs) include video calling services, voice calling services, video on demand (VOD) services, web browsing services, and peer-to-peer file sharing. It can be classified into various classes of services such as sharing service.

Therefore, the broadband communication network BcN accepts / processes the traffic from the general purpose terminal in accordance with the service grade.

At this time, traffic should be classified according to service class. Terminals with specialized functions such as dedicated IP (Internet Protocol) telephone and video on-demand set-top box (VOD STB) can be classified by IP address. Do.

However, services required by general-purpose terminals such as PCs are mixed with various grades of services, and thus, it is difficult to distinguish them by source IP addresses.

In order to solve this problem, a method of maintaining a quality of service (QoS) has been proposed by placing a type of service (TOS) field in an IP header of a packet to be transmitted and marking and transmitting it in a general purpose terminal. At this time, the packet is an application program, Transmission Control Protocol (TCP) / User Datagram Protocol (UDP), Internet Protocol (IP), Ethernet (Ethernet) according to the seventh layer of Open System Interconnection (OSI), as shown in FIG. ), It is transmitted through the network interface card (NIC).

However, a method of classifying service grades using such a type field has a problem in that when a malicious subscriber arbitrarily marks a service type field of a packet, it cannot be distinguished in a broadband communication network.

Currently, existing quality of service (QoS) such as RFC2474 (RFC2474), which defines the definition of service fields in the headers of Internet Protocol version 4 and Internet Protocol version 6, and RFC2475 (RFC2475), which indicates the structure for the distinct services, etc. The related standardization technique refers to a method of marking a differentiated services code point (DSCP) field of an IP packet according to a service class, and a method for differentiating and processing in a broadband communication network according to the DSCP value.

However, it is not mentioned what criteria to classify the packets and mark them in the DSCP field, which is not mentioned in RFC as well as other technical data.

Therefore, when marking according to the service level in the subscriber application, there is a problem that there is no way to distinguish this in the broadband communication network when the malicious user arbitrarily marks the DSCP field.

Another conventional class of service classifying method is to classify service class by checking Layer 4 port numbers.

This method also has a problem in that when the subscriber arbitrarily modifies the 4th layer port number, there is no way to distinguish it from the broadband communication network.

The present invention has been proposed to solve the above problems, and the application stack having a high priority by checking the priority of the application traffic generated as the application is activated after the authentication process, the network stack based on the layer 2 tunneling protocol And low priority application traffic through the transmission control protocol / Internet protocol based network stack, so that the application traffic that should guarantee the quality of service in the broadband network can be efficiently identified. An object of the present invention is to provide a method of transmitting application traffic for guaranteeing a service quality in a terminal and a computer-readable recording medium recording a program for realizing the method.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

According to an aspect of the present invention, there is provided a method of transmitting application traffic for quality of service in a general purpose terminal, comprising: an application program storing step of storing an application program having a priority; A priority checking step of confirming whether one application has a high priority as it is activated to generate application traffic; A first application transmission step of transmitting the application traffic through a network stack based on a transmission control protocol / Internet protocol if it has a low priority as a result of the checking; And a second application transmission step of transmitting the application traffic through a network stack based on the two-layer tunneling protocol through an authentication process if it has a high priority as a result of the checking.                     

On the other hand, the present invention, in order to ensure the quality of service of the application traffic, the general-purpose terminal having a processor, an application program storage function for storing an application program having a priority; A priority checking function for checking whether one application has a high priority as it is activated to generate application traffic; A first application transmission function for transmitting the application traffic through a network control based on a transmission control protocol / Internet protocol if it has a low priority; And as a result of the confirmation, the computer-readable recording medium recording a program for realizing a second application transmission function for transmitting the application traffic through a network stack based on a two-layer tunneling protocol through a process of authentication if it has a high priority. To provide.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram illustrating an embodiment of a network stack of a general-purpose terminal according to the present invention.

First, the general purpose terminal 21 stores various application programs, and stores information on an application program for generating application traffic having a high priority. Therefore, when the application generating the high-priority application traffic is activated, it is linked with the network stack based on the layer 2 tunneling protocol to ensure the quality of service.

In addition, the general-purpose terminal 21 has a dual network stack, that is, a network stack based on a layer 2 tunneling protocol and a network based on a transmission control protocol / Internet protocol. At this time, if the traffic generated by the application program is a high-priority application traffic, the TCP / UDP socket information (number) for processing traffic having a high priority is assigned to UDP / TCP, IP, and PPP (Point to Point Protocol). Through the Layer 2 Tunneling Protocol-based network stack, including Layer 2 Tunneling Protocol (L2TP), and TCP / UDP socket information (number) for low priority application traffic processing. It is processed through the network stack based on the transmission control protocol / Internet protocol including UDP / TCP, IP, and Ethernet.

Traffic (packet) processed through the above process is delivered to the network server (LNS: Layer 2 tunneling protocol Network Server) (LNS) through the L1 / L2 and IP of the router 22.

At this time, the network server 23, the high-priority application traffic to the QoS network 24 through a layer 2 tunneling protocol-based network stack including L1 / L2, IP, UDP, L2TP, PPP, IP, etc. The application traffic having a low priority is transmitted to the general network 25 through L1 / L2, IP, and the like.

Here, the reception of application traffic having a high priority and application traffic having a low priority are processed in the reverse order of the above processing.

3 is a diagram illustrating an embodiment of a method for transmitting application traffic of a general-purpose terminal according to the present invention.

Hereinafter, application traffic having high priority will be described using Voice over Internet Protocol (VoIP) as an example, and application traffic having low priority will be described using HTTP (HyperText Transfer Protocol) as an example.

At this time, since the reception process of the high priority application traffic and the low priority application traffic in the general purpose terminal is the reverse of the transmission process, only the transmission process will be described.

First, as the VoIP occurs, the universal terminal assigns a socket number for processing application traffic having a high priority and connects it with the TCP / UDP stack.

Then, as shown in FIG. 4A through the TCP / UDP stack, adds a UDP or TCP field to the VoIP packet.

Then, as shown in FIG. 4B through the IP stack, an IP header is further added to the VoIP packet.

Thereafter, as illustrated in FIG. 4C, the PPP / L2TP header is further added to the VoIP packet through the PPP / L2TP stack. At this time, the PPP / L2TP header is added to the VoIP packet only when the authentication process is normally performed.                     

Thereafter, as illustrated in FIG. 4D, the TCP / UDP header is further added to the VoIP packet through the TCP / UDP stack.

Thereafter, as shown in FIG. 4E through the IP stack, an IP header is further added to the VoIP packet.

Thereafter, as shown in FIG. 4F through the Ethernet stack, an Ethernet header is further added to the VoIP packet.

Thereafter, the VoIP packet as shown in FIG. 4F is transmitted to the network server LNS.

In addition, the general-purpose terminal assigns a socket number for application traffic processing having a low priority as the HTTP occurs and connects it with the TCP / UDP stack.

Thereafter, as shown in FIG. 4A through the TCP / UDP stack, a UDP or TCP field is added to the HTTP packet.

Thereafter, as shown in FIG. 4B through the IP stack, an IP header is further added to the HTTP packet.

Thereafter, as shown in FIG. 4G through the Ethernet stack, an Ethernet header is further added to the HTTP packet.

Then, the HTTP packet as shown in Figure 4g is transmitted to the network server (LNS).

Through this process, the tunneled traffics in the network are changed to LNS (L2TP Network Server) where the destination address terminates tunneling. At this time, the original destination address of the traffic remains as it is.

Therefore, in a QoS network, only the source IP or destination IP address is rated. That is, high priority only applies to traffic having a network server (LNS) address as a destination address or traffic generated from the network server (LNS).

5 is a flowchart illustrating an embodiment of an authentication procedure according to the present invention.

First, the PPP / L2TP stack transmits an ID and password for PPP authentication to a network server (LNS) (501).

Thereafter, the network server (LNS) approves if the ID and password received through the PPP / L2TP stack match the ID and password stored therein and establishes an IP address and a PPP session (502).

Thereafter, the PPP / L2TP stack requests an ID and a password according to the request for access to the PPP / L2TP stack from an application program generating high priority application traffic (503, 504).

Thereafter, the PPP / L2TP stack grants access to the PPP / L2TP stack in response to receiving the ID and password from the application program (505, 506). Of course, if the ID and password received from the application does not match the ID and password that they have access is not allowed.

6 is a flowchart illustrating a method for transmitting application traffic for guaranteeing service quality in a general purpose terminal according to the present invention.

First, the general purpose terminal stores an application program having a priority (601). At this time, the priority is divided into a high priority and a low priority, and the application traffic generated in the high priority application also has a high priority. On the other hand, application traffic generated by a low priority application also has a low priority.

Thereafter, it is checked whether one application has a high priority as it is activated to generate application traffic (602, 603).

As a result of the check 603, if the application has a low priority, the application traffic is transmitted through the transmission control protocol / Internet protocol based network stack (604).

On the other hand, if the check result 603 has a high priority, the authentication process is performed (605).

Thereafter, the application traffic is transmitted through the network stack based on the layer 2 tunneling protocol (606).

Application traffic transmitted through this process adds a plurality of headers, and adds a field whose destination address is the network server (LNS). Therefore, in the broadband communication network, the traffic whose destination address is the network server (LNS) is transmitted to the QoS network.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.                     

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

As described above, the present invention checks the priority of the application traffic generated as the application is activated, and then the application traffic having a high priority is transmitted through the network stack based on the layer 2 tunneling protocol after authentication. Application traffic having priority is transmitted through a network stack based on a transmission control protocol / Internet protocol, thereby effectively distinguishing application traffic that should guarantee service quality in a broadband communication network.

Claims (4)

In the general purpose terminal, the application traffic transmission method for guaranteeing the quality of service, An application program storing step of storing an application program having a priority; A priority checking step of confirming whether one application has a high priority as it is activated to generate application traffic; A first application transmission step of transmitting the application traffic through a network stack based on a transmission control protocol / Internet protocol if it has a low priority as a result of the checking; And A second application transmission step of transmitting the application traffic through a network stack based on a layer 2 tunneling protocol through an authentication process if it has a high priority as a result of the checking Application traffic transmission method for guaranteeing the quality of service in a general-purpose terminal comprising a. The method of claim 1, The priority is divided into a high priority and a low priority. Application traffic generated by an application having a high priority has a high priority and application traffic generated by an application having a low priority has a low priority. Application traffic transmission method for guaranteeing the quality of service in a general-purpose terminal having a. The method of claim 1, And wherein said application traffic in said second application transmission step has a network server as a destination address. In order to guarantee the quality of service of the application traffic, to a general-purpose terminal having a processor, An application storage function for storing an application program having a priority; A priority checking function for checking whether one application has a high priority as it is activated to generate application traffic; A first application transmission function for transmitting the application traffic through a network control based on a transmission control protocol / Internet protocol if it has a low priority; And As a result of the check, if the application has a high priority, a second application transmission function of transmitting the application traffic through a network stack based on a layer 2 tunneling protocol through an authentication process A computer-readable recording medium having recorded thereon a program for realizing this.

Images