KR20050080257A - Method for bear traffic classifying of dual backbone network - Google Patents

Abstract

The present invention relates to a bearer traffic classification method in a dual backbone network.

The bearer traffic classification method in the dual backbone network is allocated to receive and receive call data by the receiving and calling terminal while the soft switch recognizes the call request from the calling terminal and attempts to establish a call by establishing a call. One port number and the IP address of the incoming and outgoing terminal are informed to the L4 switch, and the L4 switch sends the bearer traffic to the port number and IP address notified from the soft switch when the call is fully established and the media flow for actual bearer traffic is generated. Map and send to the backbone network.

In this way, it is possible to provide general Internet service and SIP-based voice and video call service in the next generation network to existing Internet subscribers under the operation environment of the dual-backed money backbone network. New services in the network can be provided quickly.

Description

Method for classifying bearer traffic in a binary backbone network {METHOD FOR BEAR TRAFFIC CLASSIFYING OF DUAL BACKBONE NETWORK}

The present invention relates to a bearer traffic classification method in a dual backbone network.

Under the network operation environment that is dualized into the backbone network and the next-generation backbone network for the existing Internet service, the telecommunications service provider is based on the next-generation SIP (session initiation protocol) while maintaining the current Internet service. Voice and video call services should be provided.

Here, SIP is a text-based application layer control protocol that allows the creation, modification, and termination of sessions such as teleconference, telephone, visit, event notification, and instant messaging using the Internet.

 It allows Internet subscribers to use existing premises equipment and PC-based voice and video communication terminals as they are, and bearer traffic of network services that is dualized to accommodate SIP-based voice and video call services of next-generation networks without new subscriber configuration. Must be classified as an IP port through an L4 switch to branch traffic to that backbone network.

L4 switches can classify packets on the network and send them to a server that can handle the traffic, drop certain types of traffic, and create an infrastructure that can more efficiently handle critical business traffic. give.

However, it is virtually difficult to classify bearer traffic because applications that provide SIP-based voice and video call services in next-generation networks use IP ports variably.

In the case of a SIP-only software terminal, the incoming and outgoing call is configured to randomly assign a receiving port to one of the dynamic port numbers of the IANA. Therefore, the PC-based SIP dedicated software terminal cannot always classify SIP-based bearer traffic even when using an L4 switch because the receiving IP port for incoming and outgoing bearer traffic is always variable.

Therefore, in a network operation environment where the backbone network is dualized, the L4 switch can classify bearer traffic in response to the change of the variable IP port in order to provide the SIP-based voice and video call service of the existing Internet service and the next-generation network. It is necessary to have skills.

The technical problem to be achieved in the present invention is to provide a backbone network that classifies bearer traffic of Internet services and new services of next-generation networks under a dual backbone network and delivers them to the corresponding backbone network without changing the existing subscriber network. It is to provide a bearer traffic classification method.

In order to solve this problem, the present invention classifies bearer traffic and transmits the bearer traffic to the corresponding backbone network using the COPS protocol between the L4 switch and the soft switch in the call setup process.

The bearer traffic classification method in a dual backbone network according to the first aspect of the present invention is a dual backbone network for accommodating both an internet network providing an internet service and a next generation backbone network providing a next generation (NGN) multimedia service. In the bearer traffic classification method of A, when a call request is received from the originating terminal in a soft switch performing a call control function between the originating terminal and the terminating terminal, the call-related messages are processed to process the call-related message between the originating terminal and the terminating terminal. Attempting to connect a call; B) When step A) is completed, the soft switch uses the IP address of the called and originating terminal and the receiving port number of the bilateral call data to control packet classification and path through a common open policy service (COPS) protocol. Notifying each of the switches; C) When step B) is completed, a bearer channel is set up so that a call is made between the calling terminal and the called terminal, and an IP address and a port notified of the bearer traffic for the call data from the soft switch at the L4 switch. Mapping and forwarding the classification to the corresponding Internet network / next generation backbone network.

Step A) includes: i) transmitting a call request message to the soft switch when the originating terminal calls a Uniform Resource Protocol (URL) to the called terminal; Ii) the soft switch receiving the call request message in step iii) transmitting the call request message to the called terminal through user authentication; And iii) notifying, by the called terminal receiving the call request message in step ii), of the call connection attempt to the calling terminal through the soft switch.

In step B), i) if the call connection between the calling terminal and the called terminal is successful, the soft switch notifies the L4 switch to which the called terminal belongs to the port number and IP address assigned by the calling terminal through the COPS protocol. Doing; And ii) when step iii) is completed, the soft switch preferably notifies the L4 switch to which the originating terminal belongs to the port number and IP address allocated by the originating terminal through the COPS protocol.

The step C) may include: i) storing the port number and the IP address notified from the soft switch by the L4 switch of the called terminal and the calling terminal, respectively; Ii) if the call connection between the calling terminal and the called terminal is successful and a bearer channel is established between the calling terminal and the called terminal, transmitting the bearer traffic of the contents of the call to the other party through the L4 switch to which the calling and destination terminal belongs; And iii) each L4 switch receiving bearer traffic from the originating and terminating terminal in step ii) to determine an internet network / next backbone network to carry the bearer traffic using the port number and IP address stored in step iv). It is preferred to include the step.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.

First, a bearer traffic classification system in a dual backbone network according to the first embodiment of the present invention will be described in detail with reference to FIG.

1 shows a configuration of a bearer traffic classification system in a dual backbone network according to the first embodiment of the present invention.

As shown in FIG. 1, the bearer traffic classification system in the dual-money backbone network according to the first embodiment of the present invention is largely classified into an access network system 100, an Internet system 200, a next-generation backbone network system 300, L4 switch 400 is configured.

The access network system 100 includes a connection node 110 and subscriber network equipment 120 to accommodate Internet services and next generation network services. The Internet system 200 includes an edge node 210, a relay node 220, and a customer database to provide Internet services to subscribers. Next-generation backbone network system 300 is a SIP-based voice and video call. It includes a soft switch 310, an edge node 320, a relay node 330, and a customer database to provide a service.

The soft switch 310 in the next generation backbone network system 300 is defined as a software platform that provides call control functions such as call access and control, number translation and routing functions in the next generation network.

The soft switch 310 performs three functions: ① call processing and control function for processing call-related messages for a call from the terminal and allocating bandweed for the call, ② L4 switch 400 through the COPS protocol Traffic classification information generation notification function to store IP address and port number of the call requested in the storage medium, and ③ delete the IP address and port number of the call requested by the L4 switch 400 through the COPS (Common Open Policy Service) protocol. The traffic classification information deletion notification function is performed.

The COPS protocol is a protocol that expresses policy information and reflects it on actual equipment (routers or switches).

The L4 switch 400 is a load balancer that classifies and routes packets in the Layer 4 category of the OSI reference model, manages sessions occurring in Layer 4, and manipulates packets for session management.

The L4 switch 400 receives the IP address and port number from the soft switch 310 through the COPS protocol, generates and deletes the corresponding IP address and port number, and generates bearer traffic using the generated IP address and port number. It performs the function of classifying and transmitting into network and internet.

Next, the operation of a bearer traffic classification system in a dual backbone network according to an embodiment of the present invention will be described in detail with reference to FIG. 2.

2 shows a call processing procedure for voice traffic classification in a bearer traffic classification method in a dual backbone network according to an embodiment of the present invention.

As shown in FIG. 2, the bearer traffic classification method in the dual backbone room according to the embodiment of the present invention is a call request (INVITE) message when a SIP URL (including a phone number) of a called terminal is called from an originating terminal. Is sent to the softswitch.

The soft switch internally performs the user authentication procedure and then transmits an INVITE message to the called terminal. Then, the subscriber of the called terminal recognizes the incoming call and responds to the soft switch with 180 Ringing.

The soft switch notifies the calling terminal of the 180 ringing message indicating that the called terminal recognizes the incoming call.

Thereafter, the subscriber of the called terminal picks up the handset and notifies the soft switch with a 200 OK message, and the soft switch receives the 200 OK message of the called terminal and inputs the IP address of the calling terminal and the port number assigned by the calling terminal. The L4 switch (B) to which the called terminal belongs is notified through the COPS protocol.

The soft switch receives the 200 OK message of the called terminal and notifies the L4 switch (A) to which the calling terminal belongs to the IP address of the called terminal and the port number assigned by the called terminal through the COPS protocol.

In the above, the called terminal and the calling terminal are to create a media flow for establishing a call and assign a port number for receiving actual voice and video data.

The L4 switches (A) and (B) store respective IP addresses and port numbers notified from the soft switch in the storage medium.

The soft switch confirms that the L4 switches (A) and (B) have been correctly informed of the IP address and port number, and transmits a 200 OK message to the calling terminal indicating that the subscriber of the called terminal picked up the telephone.

After the calling terminal receives the 200 OK message, it transmits an ACK message to the soft switch.

The softswitch transmits an ACK message to the called terminal, and transmits the contents of the caller correctly receiving the 200 OK message of the called terminal.

When the call is established in this way, a call is made between the called terminal and the calling terminal. The called terminal and the calling terminal establish a bearer channel between the two to generate a media flow for actual bearer traffic, and deliver the voice packets between them. The call is possible.

At this time, the voice packet is delivered to the other party through the L4 switches (A) and (B) to which the called terminal and the calling terminal belong. For this purpose, the L4 switches (A) and (B) generate a media flow for actual bearer traffic. When the bearer traffic is mapped to the IP address and port number notified by the soft switch, the bearer traffic is forwarded to the next-generation backbone network or the Internet.

The bearer traffic classification method in the dual backbone network according to the embodiment of the present invention is described with reference to the voice packet in FIG. 2, but the same call processing procedure is applied to the video packet.

Although the preferred embodiment of the present invention has been described in detail above, the present invention is not limited thereto, and various other changes and modifications are possible.

As described above, the bearer traffic classification method in the backbone network according to the present invention can provide general Internet service and SIP-based voice and video call service in the next generation network under the dual backbone network operating environment. Therefore, there is an effect that can quickly provide new services of the next generation network without changing the subscriber network.

1 shows a configuration of a bearer traffic classification system in a dual backbone network according to the first embodiment of the present invention.

 2 shows a call processing procedure for voice traffic classification in a bearer traffic classification method in a dual backbone network according to an embodiment of the present invention.

Claims (4)

In a bearer traffic classification method in a dual backbone network to accommodate both an internet network providing an internet service and a next generation backbone network providing a next generation (NGN) multimedia service, A) when a call request is received from the originating terminal in a soft switch performing a call control function between the originating terminal and the called terminal, processing the call-related messages and attempting to connect a call between the originating terminal and the called terminal; B) When step A) is completed, the soft switch uses the IP address of the called and originating terminal and the receiving port number of the bilateral call data to control packet classification and path through a common open policy service (COPS) protocol. Notifying each of the switches; C) When step B) is completed, a bearer channel is set up so that a call is made between the calling terminal and the called terminal, and an IP address and a port notified of the bearer traffic for the call data from the soft switch at the L4 switch. Mapping by number and delivering the classification to the corresponding Internet network / next-generation backbone network Bearer traffic classification method in a dual backbone network comprising a. The method of claim 1, Step A) is Iii) transmitting a call request message to the soft switch when the calling terminal calls a Uniform Resource Protocol (URL) to the called terminal; Ii) the soft switch receiving the call request message in step iii) transmitting the call request message to the called terminal through user authentication; And Iii) the called terminal receiving the call request message in step ii) notifying the calling terminal of the response to the call connection attempt through the soft switch; Bearer traffic classification method in a dual backbone network comprising a. The method of claim 1, Step B) is Iii) if the call connection between the calling terminal and the called terminal is successful, the soft switch notifying the port number and IP address assigned by the calling terminal to the L4 switch to which the called terminal belongs through the COPS protocol; And Ii) when the step iii) is completed, the soft switch notifies, via the COPS protocol, the L4 switch to which the originating terminal belongs to the port number and IP address assigned by the originating terminal. Bearer traffic classification method in a dual backbone network comprising a. The method of claim 1, Step C) is Iv) the L4 switch of the called terminal and the calling terminal storing the port number and IP address notified from the soft switch, respectively; Ii) if the call connection between the calling terminal and the called terminal is successful and a bearer channel is established between the calling terminal and the called terminal, transmitting the bearer traffic of the contents of the call to the other party through the L4 switch to which the calling and destination terminal belongs; And Iv) each L4 switch receiving bearer traffic from the originating and terminating terminal in step ii) using the port number and IP address stored in step iv) to determine an internet network / next backbone network to which bearer traffic will be delivered; Bearer traffic classification method in a dual backbone network comprising a.