KR20050082861A - System and its method for guarantee qos of voip using mpls - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to an Internet telephony service system having a service quality guarantee function using multi-protocol label switching, and a method and a computer-readable recording medium having recorded thereon a program for realizing the method.

2. The technical problem to be solved by the invention

According to the present invention, upon receiving a call connection request from an originating Internet telephone terminal in an Internet telephony service system, the present invention provides end-to-end using a multi-protocol label switching between an originating Internet telephone terminal and a called Internet telephone terminal according to a stored quality of service parameter. -Guaranteeing quality of service using multiprotocol label switching to guarantee quality of Internet telephony (QoS) by setting up a single pass and sending and receiving call data between calling and receiving Internet telephony terminals according to the set pass It is an object of the present invention to provide an Internet telephone service system having a function, a method thereof, and a computer-readable recording medium recording a program for realizing the method.

3. Summary of the Solution of the Invention

The present invention provides an Internet telephone service system having a service quality guarantee function using multiprotocol label switching, comprising: quality parameter storage means for storing quality of service parameters corresponding to each Internet telephone terminal; The multi-protocol label switching (MPLS) setting request is retrieved from the quality parameter storage means according to the multi-protocol label switching (MPLS) setting request message received from the calling Internet telephone terminal. Quality of service parameter retrieval means for inclusion in a message and for transmission to label setting means; And a label (line pass) that satisfies the quality of service parameter from the calling Internet telephone terminal to the called Internet telephone terminal in accordance with a multi-protocol label switching (MPLS) setting request message from the quality of service parameter retrieving means, And said label setting means for making a call connection setting and a call between said calling Internet telephone terminal and said called Internet telephone terminal through said set label (line pass).

4. Important uses of the invention

The present invention is used for Internet telephony (VoIP) services.

Description

System and its method for guarantee QoS of VoIP using MPLS

The present invention relates to an Internet telephony service system having a service quality guarantee function using multi-protocol label switching, and a method and a computer readable recording medium recording a program for realizing the method. When the service system receives a call connection request from the calling Internet phone terminal, it sets up a one-to-one pass using multi-protocol label switching between the calling Internet phone terminal and the called Internet phone terminal according to the stored quality of service parameters. Internet telephony service with service quality guarantee function using multi-protocol label switching to guarantee Internet telephony quality of service (QoS) by sending and receiving call data between calling and receiving internet phone terminal according to the set pathA system, a method thereof, and a computer-readable recording medium having recorded thereon a program for realizing the method.

In general, since the VoIP service is a real-time transmission, the parameters such as bandwidth and jitter have a great influence on the communication quality. Nevertheless, it is difficult to guarantee the quality of voice (VoIP) service because the general VoIP service uses the multicast packet communication method by the core router. In order to solve this problem, multi-protocol label switching (MPLS) technology can be used for VoIP services.

Multiprotocol Label Switching (MPLS) technology is a standard proposed by the Internet Engineering Task Force (IETF) to satisfy the requirements for Quality of Service (QoS) and Service Availability (QoS) of Internet traffic.

Multiprotocol Label Switching (MPLS) technology uses Multiprotocol Label Switching (MPLS) to exchange label information generated from routing information for packet transmission from a Source Host to a Destination Host. Defines signaling protocols, procedures for creating and deleting labels, and traffic engineering procedures for specific packets.

This multi-protocol label switching (MPLS) technology simplifies packet forwarding, providing traffic engineering capabilities that improve transmission speed, guarantee quality of service (QoS), and dynamically respond to traffic, so that asynchronous mode transmission (ATM) is achieved. Transfer Mode) It is widely applied to high-speed switching network environment such as switching network and frame relay network.

However, in the conventional method of applying a multiprotocol label switching (MPLS) technique in an Internet telephony service network, a line path to an originating edge router, a core router, and a destination edge router is set, and the multipath is set according to the set circuit path. Protocol label switching (MPLS) technology was applied.

However, such a conventional method can guarantee the quality of service (QoS) in the core network, but there is a problem that the quality of service (QoS) between the edge router and the Internet telephone terminal cannot be guaranteed. As a result, there was a problem that the overall quality of the Internet telephone service quality (QoS) cannot be satisfied.

Therefore, considering that a large portion of the delay in the Internet telephony service occurs in the section from the edge router to the Internet telephony terminal rather than the core network, there is an urgent way to solve this problem and guarantee the quality of service (QoS) in the entire section. Required.

The present invention has been proposed to solve the above problems, and when the call connection request is received from the calling Internet phone terminal in the Internet telephony service system, the calling Internet phone terminal and the called Internet are based on the stored quality of service parameters. Guaranteeing Quality of Service (QoS) by setting up end-to-end pass using multi-protocol label switching between phone terminals and sending and receiving call data between calling and receiving Internet phone terminals according to the set path An object of the present invention is to provide an Internet telephony service system having a service quality assurance function using multi-protocol label switching, and a method and a computer-readable recording medium having recorded thereon a program for realizing the method.

An apparatus of the present invention for achieving the above object is a quality parameter storage means for storing a quality of service parameter corresponding to each Internet telephone terminal in an Internet telephone service system having a quality of service guarantee function using multiprotocol label switching. ; The multi-protocol label switching (MPLS) setting request is retrieved from the quality parameter storage means according to the multi-protocol label switching (MPLS) setting request message received from the calling Internet telephone terminal. Quality of service parameter retrieval means for inclusion in a message and for transmission to label setting means; And a label (line pass) that satisfies the quality of service parameter from the calling Internet telephone terminal to the called Internet telephone terminal in accordance with a multi-protocol label switching (MPLS) setting request message from the quality of service parameter retrieving means, And the label setting means for making a call connection setting and a call between the calling Internet telephone terminal and the called Internet telephone terminal through the set label (line pass).

On the other hand, in the method of the present invention, in the method of guaranteeing the quality of Internet telephone service using multi-protocol label switching, the service quality parameter retrieval means is made according to the multi-protocol label switching (MPLS) setting request message received from the calling Internet telephone terminal. A service quality parameter retrieval step of retrieving a quality of service parameter corresponding to the originating Internet telephone terminal from the quality parameter database to be managed and included in a multi-protocol label switching (MPLS) setting request message and then transmitting it to a label setting means; A label (line pass) that the label setting means satisfies the quality of service parameter from the calling Internet telephone terminal to the called Internet telephone terminal in accordance with a multi-protocol label switching (MPLS) setting request message from the quality of service parameter retrieving means. A label setting step for setting a call connection and making a call between the calling Internet telephone terminal and the called Internet telephone terminal through the set label (line pass); And a label releasing step of the label setting means releasing a label (line path) setting according to a multi-protocol label switching (MPLS) release message received from the originating Internet telephone terminal via the quality of service parameter retrieval means. It features.

Meanwhile, the present invention relates to an Internet telephone service system having a processor from a quality parameter database managed by the service quality parameter retrieval unit according to a multi-protocol label switching (MPLS) setting request message received from a calling Internet telephone terminal. A quality of service parameter retrieval function for retrieving a quality of service parameter corresponding to the originating Internet telephone terminal, including it in a multi-protocol label switching (MPLS) setup request message, and transmitting it to a label setup means; A label (line pass) that the label setting means satisfies the quality of service parameter from the calling Internet telephone terminal to the called Internet telephone terminal in accordance with a multi-protocol label switching (MPLS) setting request message from the quality of service parameter retrieving means. A label setting function for setting a call connection and making a call between the calling Internet telephone terminal and the called Internet telephone terminal through the set label (line pass); And the label setting means releases a label (line path) setting according to a multi-protocol label switching (MPLS) release message received from the originating Internet telephone terminal via the quality of service parameter retrieval means. A computer readable recording medium having recorded a program is provided.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of an Internet telephony service system having a service quality guarantee function using multiprotocol label switching according to the present invention.

As shown in Fig. 1, in the Internet telephony service system having a service quality guarantee function using multiprotocol label switching according to the present invention, a quality parameter database 13 storing service quality parameters corresponding to each Internet telephony terminal. According to the multi-protocol label switching (MPLS) setting request message received from the originating Internet telephone terminal, the multi-protocol label switching (MPLS) is retrieved from the quality parameter database 13 corresponding to the service quality parameter corresponding to the calling Internet telephone terminal. A proxy server 12 for inclusion in a setup request message and forwarding to the originating edge router 14, and the originating Internet according to the multi-protocol label switching (MPLS) setup request message from the proxy server 12. It is called Internet telephone terminal from called terminal By setting a label (line pass) that satisfies the quality of service parameter, a call connection is established and a call is made between the calling Internet telephone terminal and the called Internet telephone terminal through the set label (line pass). Originating edge router 14 is included.

Each component included in the Internet telephony service system and its surrounding components will be described in more detail with reference to FIG. 1.

The calling Internet telephone terminal 11 and the called Internet telephone terminal 18 are equipped with a multiprotocol label switching function for switching packets by simple inspection in the labeling step.

The proxy server 12 retrieves a corresponding quality of service parameter from the quality parameter database 13 in accordance with a call connection request from the originating Internet telephone terminal 11. Then, the multi-protocol label switching setting request message including the retrieved quality of service parameter is transmitted to the calling edge router 14 to set up the multi-protocol label switching environment. In this case, the quality of service parameters include bandwidth, jitter, and the like selected by the customer when the service is subscribed.

The originating edge router 14 connects the originating edge router 14 with the originating edge router 14 between the originating Internet telephone terminal 11 and the originating edge router 14 according to the multi-protocol label switching request message from the proxy server 12. A line path that satisfies the quality of service parameters between the destination edge router 17 and between the destination edge router 17 and the Internet telephone terminal 18 is set.

Then, a call is set up and a call is made between the calling Internet telephone terminal 11 and the called Internet telephone terminal 18 through the set path.

The overall operation of the present invention will be described in detail with reference to FIG. 2.

2 is a signal flow diagram of an embodiment of a method for guaranteeing the quality of an Internet telephony service using multiprotocol label switching according to the present invention.

First, when the user of the calling Internet telephone terminal 11 dials the number (IP address) of the called Internet telephone terminal 18, the calling Internet telephone terminal 11 receives the calling Internet telephone terminal information and the called Internet telephone. The multiprotocol label switching (MPLS) setting request message including the terminal information is transmitted to the proxy server 12 (201).

Then, the proxy server 12 retrieves the quality of service parameters corresponding to the originating Internet telephone terminal 11 from the quality parameter database 13 managed by the proxy server 12 and further includes them in the multi-protocol label switching (MPLS) setting request message. It then transmits to the originating edge router 14 (202).

Then, the calling edge router 14 uses the calling Internet phone terminal information, the called Internet phone terminal information, and the quality of service parameters included in the multi-protocol label switching (MPLS) request message. 11) quality of service between the edge originating edge router 14, between the calling edge router 14 and the called edge router 17, and between the called edge router 17 and the called Internet telephone terminal 18; A label (line path) satisfying the parameter is set (203). At this time, the label (line pass) is set to ensure the quality of service parameter values such as bandwidth and jitter.

In addition, the calling edge router 14 transmits a multiprotocol label switching (MPLS) setting confirmation message to the proxy server 12 after completing the label setting (204). At this time, the multi-protocol label switching (MPLS) setting confirmation message includes the quality status information of the set label (line path). Accordingly, the proxy server 12 checks whether the quality of the currently set label (line pass) satisfies the quality of service parameter from the multi-protocol label switching (MPLS) configuration confirmation message received from the originating edge router 14, If the quality of the label (line pass) does not satisfy the quality of service parameters, the process proceeds to step 202 of forwarding the multiprotocol label switching (MPLS) setup request message to the calling edge router 14, and repeats the process. If the quality of the circuit path satisfies the quality of service parameter, a multiprotocol label switching (MPLS) setting confirmation message is transmitted to the calling Internet telephone terminal 11 (205).

On the other hand, the originating Internet telephone terminal 11 receiving the multi-protocol label switching (MPLS) setting confirmation message from the proxy server 12 receives the call connection request (INVITE) message through the set label (line path). And transmits to telephone terminal 11 (206).

Then, the called party's Internet telephone terminal 18 transmits a call connection response (180 Ringing, 200 OK) message for the call connection request (INVITE) message to the calling party's Internet telephone terminal 11 (207, 208). This is done.

Thereafter, a real time protocol (RTP) media path, which is a call path between the calling Internet telephone terminal 11 and the called Internet telephone terminal 18, is set (209). At this time, a label (line pass) used in the call setup step is used as a call between the calling Internet telephone terminal 11 and the called Internet telephone terminal 18.

On the other hand, when the calling Internet phone terminal 11 receives the call termination request (BYE) message from the called Internet telephone terminal 18 (210), the call termination response (200 OK) message accordingly to the called Internet telephone terminal The call is terminated by sending to 18 (211). In addition, the calling Internet telephone terminal 11 transmits a multi-protocol label switching (MPLS) release message to the proxy server 12 (212).

Then, the proxy server 12 transmits to the calling edge router 14 a multi-protocol label switching (MPLS) release message including the calling Internet telephone terminal information and the called Internet telephone terminal information (213). The side edge router 14 releases the label (line pass) setting according to the multiprotocol label switching (MPLS) release message received from the proxy server 12, and then sends a multiprotocol label switching (MPLS) release confirmation message to the proxy server. And transmits to 12 (214).

Then, the proxy server 12 transmits a multiprotocol label switching (MPLS) release confirmation message to the calling Internet telephone terminal 11 (215), thereby terminating all call processes.

Meanwhile, in the above embodiment, the function of managing and searching the quality parameter database 13 is implemented in the proxy server 12, but may be implemented in other components of the VoIP system.

Also, in the above embodiment, the multi-protocol label switching (MPLS) setting and release function is implemented in the calling edge router 14, but may be implemented in other components of the VoIP system.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.). 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 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 uses the multi-protocol label switching between the calling Internet phone terminal and the called Internet phone terminal according to the stored quality of service parameter when receiving a call connection request from the calling Internet phone terminal in the Internet telephone service system. By setting up a one-to-one pass and sending and receiving call data between the calling Internet phone terminal and the called Internet phone terminal according to the set path, various quality of service can be selected by the customer. ) Is effective to ensure.

1 is a block diagram of an embodiment of an Internet telephony service system having a service quality guarantee function using multiprotocol label switching according to the present invention.

2 is a signal flow diagram of an embodiment of the method of guaranteeing the quality of Internet telephony service using multi-protocol label switching according to the present invention.

* Explanation of symbols on the main parts of the drawing

11,18: Internet phone terminal 12: proxy server

13: Quality Parameter Database 14,17: Edge Router

15,16: Core Router

Claims (5)

In the Internet telephone service system having a quality of service guarantee function using a multi-protocol label switching, Quality parameter storage means for storing quality of service parameters corresponding to each Internet telephone terminal; The multi-protocol label switching (MPLS) setting request is retrieved from the quality parameter storage means according to the multi-protocol label switching (MPLS) setting request message received from the calling Internet telephone terminal. Quality of service parameter retrieval means for inclusion in a message and for transmission to label setting means; And According to the multi-protocol label switching (MPLS) setting request message from the quality of service parameter searching means, a label (line pass) satisfying the quality of service parameter is set from the calling Internet telephone terminal to the called Internet telephone terminal, The label setting means for making a call connection setting and a call between the calling Internet telephone terminal and the called Internet telephone terminal through the set label (line pass). Internet phone service system having a service quality guarantee function using a multi-protocol label switching comprising a. The method of claim 1, The label setting means, Performing a function of transmitting a multi-protocol label switching (MPLS) setting confirmation message indicating that the path setting is completed to the quality of service parameter retrieval means as the label setting is completed, The service quality parameter retrieval means From the multiprotocol label switching (MPLS) setting confirmation message sent from the label setting means, the quality of the currently set label (line path) satisfies the retrieved quality of service parameter, and the quality of the currently set label (line path) is checked. If the quality of service parameter is not satisfied, the multiprotocol label switching (MPLS) setting request message is retransmitted to the label setting means, and if the quality of the currently set label (line path) satisfies the quality of service parameter, the multiprotocol label switching is performed. (MPLS) An Internet telephony service system having a service quality guarantee function using multi-protocol label switching, further comprising the step of transmitting a setting confirmation message to the calling Internet telephony terminal. In the method of guaranteeing the quality of Internet telephony service using multi-protocol label switching, According to the multi-protocol label switching (MPLS) setting request message received from the calling Internet phone terminal, the quality of service parameter retrieving means retrieves a quality of service parameter corresponding to the calling Internet phone terminal from the quality parameter database managed by the service quality parameter searching means. A quality of service parameter retrieval step of including in a protocol label switching (MPLS) setting request message and transmitting the same to a label setting means; A label (line pass) that the label setting means satisfies the quality of service parameter from the calling Internet telephone terminal to the called Internet telephone terminal in accordance with a multi-protocol label switching (MPLS) setting request message from the quality of service parameter retrieving means. A label setting step for setting a call connection and making a call between the calling Internet telephone terminal and the called Internet telephone terminal through the set label (line pass); And A label release step of the label setting means releasing a label (line pass) setting according to a multi-protocol label switching (MPLS) release message received from the originating Internet telephone terminal via the quality of service parameter retrieval means; Internet phone service quality guarantee method using a multi-protocol label switching comprising a. The method of claim 3, wherein The label setting step, A label (line pass) that the label setting means satisfies the quality of service parameter from the calling Internet telephone terminal to the called Internet telephone terminal in accordance with a multi-protocol label switching (MPLS) setting request message from the quality of service parameter retrieving means. Setting up; Transmitting, by the label setting means, a multiprotocol label switching (MPLS) setting confirmation message indicating that the path setting is completed to the service quality parameter retrieval means after the label setting is completed; Checking, by the service quality parameter retrieving means, whether the quality of the currently set label (line pass) satisfies the retrieved quality of service parameter from the multi-protocol label switching (MPLS) setting confirmation message received from the label setting means; Resending a multiprotocol label switching (MPLS) setting request message to the label setting means if the quality of the currently set label (line pass) does not satisfy the quality of service parameter; And As a result of the inspection, if the quality of the currently set label (line pass) satisfies the quality of service parameter, a multiprotocol label switching (MPLS) setting confirmation message is transmitted to the calling Internet telephone terminal, and the calling Internet telephone terminal and the called party Establishing a call connection and making a call between the Internet telephone terminals through the set label (line pass) Internet phone service quality guarantee method using a multi-protocol label switching comprising a. In the Internet telephone service system provided with a processor, According to the multi-protocol label switching (MPLS) setting request message received from the calling Internet phone terminal, the quality of service parameter retrieving means retrieves a quality of service parameter corresponding to the calling Internet phone terminal from the quality parameter database managed by the service quality parameter searching means. A quality of service parameter retrieval function for inclusion in a protocol label switching (MPLS) setup request message and forwarded to a label setup means; A label (line pass) that the label setting means satisfies the quality of service parameter from the calling Internet telephone terminal to the called Internet telephone terminal in accordance with a multi-protocol label switching (MPLS) setting request message from the quality of service parameter retrieving means. A label setting function for setting a call connection and making a call between the calling Internet telephone terminal and the called Internet telephone terminal through the set label (line pass); And A label releasing function of the label setting means releasing a label (line path) setting according to a multi-protocol label switching (MPLS) releasing message received from the originating Internet telephone terminal through the quality of service parameter retrieval means; A computer-readable recording medium having recorded thereon a program for realizing this.