KR20120068514A - Apparatus and method for managing and notifying traffic status of ims - Google Patents

Apparatus and method for managing and notifying traffic status of ims Download PDF

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Publication number
KR20120068514A
KR20120068514A KR1020100130167A KR20100130167A KR20120068514A KR 20120068514 A KR20120068514 A KR 20120068514A KR 1020100130167 A KR1020100130167 A KR 1020100130167A KR 20100130167 A KR20100130167 A KR 20100130167A KR 20120068514 A KR20120068514 A KR 20120068514A
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South Korea
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traffic
traffic state
network element
state
information
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KR1020100130167A
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Korean (ko)
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박석규
우상우
이운영
정욱
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주식회사 케이티
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Priority to KR1020100130167A priority Critical patent/KR20120068514A/en
Publication of KR20120068514A publication Critical patent/KR20120068514A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/06—Generation of reports
    • H04L43/062—Generation of reports related to network traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)

Abstract

PURPOSE: An apparatus and a method for managing the traffic state of an IP multimedia subsystem(IMS) network and an apparatus and a method for informing the traffic state of the IMS network are provided to control traffics by providing traffic state information to network elements. CONSTITUTION: A traffic state managing part(211) collects traffic state information transmitted from network elements. The traffic state managing part manages the traffic state of the network elements. A traffic information providing part(212) spreads the traffic state of the network elements to other network elements. A first information storing part(213) stores the traffic state information of the network elements and other network elements. If traffic state information to congestion is received, the traffic state managing part confirms the traffic state of the network elements.

Description

Traffic state management apparatus and method of the IMS network and traffic state notification apparatus and method therefor {APPARATUS AND METHOD FOR MANAGING AND NOTIFYING TRAFFIC STATUS OF IMS}

The present invention relates to a traffic state management apparatus and method and a traffic state notification apparatus and method, and more particularly, to centrally manage traffic state information of an IP Multimedia Subsystem (IMS) network in a home subscriber server, The present invention relates to a traffic state management apparatus and method, and a traffic state notification apparatus and method for providing traffic state information (for example, a session control server, etc.) to perform traffic control.

Recently, the IMS (IP Multimedia Subsystem) has attracted attention as a standard for realizing the Next Generation Network. IMS is a standard that provides multimedia services such as voice, audio, video, and data in an IP (Internet Protocol) based packet communication network, and is a wired / wireless integrated service through interworking with various element devices based on a high-speed wired / wireless communication network. Can be provided.

Meanwhile, in an IMS network, a session initiation protocol (SIP) is used to control a multimedia session. SIP is a signaling protocol related to a procedure for intelligent terminals to communicate on the Internet to identify and identify each other and to create / delete / modify a multimedia communication session.

In general, the IMS network includes a session control server for controlling the entire session. In this case, the session control server interworkes with a home subscriber server (HSS) that manages subscriber information, and establishes a session path by finding the location of the called party according to the incoming session request. In addition, the session control server delivers the subscriber's request to the application server in conjunction with the application server to provide an additional service for the outgoing or incoming session request, and provides a session set / release function under the control of the service logic of the application server.

IMS devices that handle large amounts of session request and release traffic may have difficulty handling traffic normally due to congestion of incoming traffic or self failure of the IMS devices. In this case, IMS equipments are urgently required to provide a high-availability service to the subscriber by increasing the survivability of the network by suppressing or bypassing traffic generation.

Conventionally, by applying a domain-based routing method of an IMS network, there is no technology for controlling traffic in the IMS network such as a network management function of a public switched telephone network (PSTN). . Therefore, in the IMS network, a prefix-based PSTN network management function and a different type of traffic control method need to be proposed.

Accordingly, the present invention centrally manages traffic state information of an IMS network in a home subscriber server, and provides traffic state information to a network element (eg, a session control server) so that traffic control can be performed. It is an object of the present invention to provide a state management apparatus and method and a traffic state notification apparatus and method.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned 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.

The apparatus of the present invention for achieving the above object, in the traffic state management device of the IMS network, a traffic state management unit for managing the traffic state of the network element and collecting the traffic state information of the own station and the country delivered from the network element ; A traffic information provider for propagating the traffic state of the network element to another network element; And a first information storage unit for storing traffic state information of the network element and the other network element.

On the other hand, another apparatus of the present invention for achieving the above object, in the traffic state notification device of the IMS network, monitoring the traffic state of the own station to calculate the traffic processing completion rate to check the current traffic state of the own station, A traffic state setting unit for notifying a traffic state management apparatus of a comparison result of a current traffic state and a previous traffic state of the traffic state management apparatus; And a second information storage unit for storing information on the previous traffic state.

In addition, another apparatus of the present invention, the traffic information request unit for requesting the traffic state management device of the traffic state information of the other network element during call processing; And a traffic controller for performing traffic control according to the traffic state information of the other network element.

On the other hand, the method of the present invention for achieving the above object, the setting step of setting the traffic state of the network element by collecting the traffic state information of the country and the power delivered from the network element; And a propagating step of propagating a traffic state of the network element to one or more other network elements.

The method may further include, after the propagating step, confirming the traffic state of the network element when the traffic state information of the congestion state is received from the network element.

On the other hand, another method of the present invention for achieving the above object comprises: determining the current traffic state of the home station by monitoring the traffic state of the home station and calculating the traffic processing completion rate; And a notification step of notifying the traffic state management apparatus of the comparison result between the current traffic state and the previous traffic state.

The method may further include requesting traffic state information of another network element from the traffic state management apparatus during call processing; And performing traffic control according to the traffic state information of the other network element.

As described above, the present invention provides a traffic management function through an IMS network management function, and improves service availability by preventing a failure from spreading by a traffic bypass function or a call gapping function even when an IMS network element fails or a traffic congestion. It can be effected.

In addition, the present invention manages the traffic congestion of all the destinations or intervals through the IMS domain routing, it is possible to provide a reliable service to the user, and to secure the stability of the elements in the IMS network .

In addition, the present invention has an effect that can be automatically handled when congestion occurs due to excessive generation of session control traffic such as Internet telephone in the IMS network.

In addition, since the present invention can determine whether one or more large power stations connected to the IMS domain network are congested with each other, traffic congestion may occur automatically in the network.

1 is a block diagram of an IMS network according to an embodiment of the present invention;
2a is a block diagram of a traffic state management apparatus according to an embodiment of the present invention;
2b is a block diagram of a traffic state notification device according to an embodiment of the present invention;
3A is a flowchart illustrating a traffic congestion management method according to an embodiment of the present invention;
3B is a flowchart illustrating a traffic congestion release state management method according to an embodiment of the present invention;
4 is a flowchart illustrating a traffic congestion setting and a traffic congestion canceling process in the home subscriber server of FIGS. 3A and 3B;
5 is a flowchart illustrating an operation of a home subscriber server in call processing;
6 is a flowchart illustrating a traffic control method according to an embodiment of the present invention;
7 is a flowchart illustrating a response process to a traffic congestion status confirmation message in the network element of FIG. 6;
8 is a diagram illustrating a format of a DIAMETER message applied to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, It can be easily carried out. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

And throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between. Also, when a component is referred to as " comprising "or" comprising ", it does not exclude other components unless specifically stated to the contrary .

1 is a block diagram of an IMS network according to an embodiment of the present invention.

As shown in FIG. 1, in an IMS network (ie, an IMS domain network) according to an embodiment of the present invention, a session control server 110, a home subscriber server 120, an application server 130, and a multimedia control server ( 140 and a network element such as the media gateway 150 are connected to each other.

First, the session control server 110 receives a session connection or disconnection request from a terminal to establish or release a session using subscriber information of the home subscriber server 120. That is, the session control server 110 checks the subscriber location through the home subscriber server 120 with respect to the session establishment request received from another session control server or another network, and sets a session path for the corresponding session establishment request. At this time, when the subscriber belongs to the PSTN or another network, the session control server 110 proceeds with the session establishment request through the media gateway 150. In addition, the session control server 110 proceeds with the session establishment request through the application server 130 to provide an additional service.

The session control server 110 may be a P-CSCF (Proxy Call State Control Function), which is a point where a subscriber accesses the IMS network for the first time, a S-CSCF (Serving Call State Control Function) that performs a central function of session control, and the like. It includes an Interrogating Call State Control Function (I-CSCF) that performs a gateway function for interworking with a network (not shown in FIG. 1). Specifically, the P-CSCF performs a function of checking a SIP message transmitted from a terminal, transmitting a request message transmitted from a terminal to another CSCF, and terminating a session when there is no access from the terminal. The S-CSCF has a function of transmitting subscriber information to the home subscriber server 120, storing and maintaining subscriber information transmitted from the home subscriber server 120, controlling the start and end of the session, and a SIP message path. Performs routing functions for The I-CSCF performs a function of selecting a corresponding home subscriber server 120 when registering a location of a subscriber, transmitting a SIP message transmitted to an appropriate S-CSCF in its own network, and the like.

The home subscriber server 120 stores all information necessary for session control and IMS service control, and in particular, provides subscriber information on location information, subscriber identification information, subscriber authentication information, etc. for the session control server 110 in which the subscriber is registered. Session setup. At this time, the home subscriber server 120 interworks with a home location register (HLR) that stores physical location information (ie, base station information) of the terminal. In addition, the home subscriber server 120 includes a subscriber locator function (SLF) to determine the location of a plurality of other home subscriber servers existing in the IMS network.

In addition to the basic session connection, the application server 130 holds additional service logic, including caller ID (CID) indication and call forwarding session processing, and provides additional services according to the request of the session control server 110.

The multimedia control server 140 provides a function necessary for operating a multimedia conference, voice guidance, and the like. Here, the multimedia control server 140 includes a multimedia resource function processor (MRFP) for providing a function of mixing, generating, and processing media streams such as voice and video, and a multimedia resource function controller (MRFC) for controlling the MRFP.

The media gateway 150 performs an IMS network based routing function by performing a gateway function for the PSTN. The media gateway 150 includes an IP Multimedia Media Gateway (IM-MGW), a MGW Control Function (MGCF), a Breakout Gateway Control Function (BGCF), and a Signaling Gateway (SGW).

As described above, the session control server 110, the application server 130, the multimedia control server 140, and the media gateway 150 interoperate with each other using SIP, and perform a routing function in the IMS network.

Figure 2a is a block diagram of a traffic state management apparatus according to an embodiment of the present invention, Figure 2b is a block diagram of a traffic state notification device according to an embodiment of the present invention.

Prior to the description of FIG. 2A and FIG. 2B, the traffic state is divided into a traffic congestion state and a normal traffic state, and in particular, the traffic congestion state is divided into a domestic congestion and a large congestion. For example, in the case where the session control server 110 is a local station in FIG. 1, the application server 130, the multimedia control server 140, and the media gateway 150 become large powers. First, local congestion indicates a traffic congestion state of the own system. Next, power congestion represents a traffic congestion state of another system connected to the own system, and a situation in which the corresponding destination system (that is, the destination system) is difficult to handle traffic normally.

As shown in FIG. 2A, the traffic state management apparatus 210 collects and manages traffic state information of the IMS network station and all other network elements, and requests from the traffic state notification device 220 mounted on the local network element. Provide traffic status information

The traffic state management device 210 includes a traffic state management unit 211 for centrally collecting and managing the traffic states of the local and other network elements in the IMS network, and the traffic state notification device 220 mounted in the local network element in the IMS network. A traffic information providing unit 212 for receiving the traffic state information of the routing destination network element, and a first information storage unit 213 for storing the traffic state information of the local station and other network elements.

At this time, the traffic state management apparatus 210 is centrally managed by being informed of the traffic state (that is, traffic congestion state or traffic normal state) from the network elements of the IMS network.

Here, the traffic state management device 210 is preferably mounted on the home subscriber server 120 that manages subscriber information of the IMS network. This is because when the originating session control server of the IMS network inquires the location of the called party to the home subscriber server 120, the home subscriber server 120 simultaneously provides the traffic state information of the called session control server, thereby providing a separate transaction. This is to allow the calling session control server to perform the call processing without determining the traffic state of the called session controlling server (transaction) (see FIG. 5 to be described later).

In addition, when the traffic state management device 210 is notified of the occurrence of traffic congestion from the traffic state notification device 220 mounted on an arbitrary network element, the traffic state management device 210 requests the traffic state notification device 220 to check the traffic state. This is to prevent a traffic state setting error due to the loss of a message or malicious hacking due to the nature of IP traffic, and to block a case where a traffic congestion release request is not received due to packet loss in an IMS network. For example, the network elements A, B, and C are equipped with the traffic state notification device 220, and the malicious hacking device D (i.e., personal PC, etc.) is transferred to the traffic state management device 210 of the home subscriber server 120. Assume a case of notifying traffic congestion setting of network element A. At this time, if the traffic state management device 210 does not request the traffic state check request to the traffic state notification device 220 of the network element A, network elements B and C determine the network element A as a traffic congestion state, the network element actually Even if A is not in a traffic congestion state, traffic bypass or call gapping can be performed immediately, resulting in confusion in IMS network operation.

In addition, SIP of a general network hierarchy selectively uses UDP (User Datagram Protocol) or TCP (Transmission Control Protocol) at a lower stage for packet transmission. However, when a request for message transmission is made by a higher layer such as SIP, UDP only adds a UDP header to transmit a packet to a destination and does not check whether the packet is received. Packets may be lost. Accordingly, the traffic state management apparatus 210 may prepare for a case in which the congestion release request due to packet loss is not received in the network by performing a traffic state check request.

As shown in FIG. 2B, the traffic state notification device 220 detects the traffic processing state of the home station and notifies the traffic state management device 210, and performs a traffic control function according to the traffic processing state of the home country and another station. . That is, the traffic state notification device 220 performs normal call processing in normal operation according to the traffic control policy, and performs gapping, call dropping, traffic bypass, etc. during congestion.

The traffic state notification device 220 monitors the traffic processing state of the local station and notifies the home subscriber server 120 of the traffic state setting unit 221, the incoming network when a session routing request is made by a terminal or another network element of the IMS network. A traffic information requesting unit 222 for requesting traffic state information of the element to the home subscriber server 120, a traffic control unit 223 for controlling traffic routing according to traffic state information of the destination network element, and a session control server 110; And a second information storage unit 224 for storing traffic state information for each device section interworking with.

In addition, the traffic state notification device 220 is mounted on all network elements (that is, session control server 110) that provides the session control function of the IMS network. In this case, the traffic state notification device 220 may be mounted on the application server 130, the multimedia control server 140, and the media gateway 150 as well as the session control server 110. For convenience of description, only the case where the session control server 110 is mounted will be described.

In addition, the traffic state notification device 220 may receive a traffic state check request from the traffic state management device 210 that provides the traffic congestion setting of the own station.

Hereinafter, the components of the traffic state notification device 220 will be described in detail.

First, the traffic state setting unit 221 monitors the traffic state of the own station and provides the home subscriber server 120 with the traffic state information of the own station. At this time, the traffic state setting unit 221 monitors the traffic state by the SIP routing generated between the local station and all the large stations connected thereto in the IMS network. That is, the traffic state setting unit 221 monitors the congestion state of the own station to determine the traffic congestion setting or release.

Accordingly, the traffic state setting unit 221 notifies the traffic state management device 220 of the home subscriber server 120 of the traffic state so that the traffic congestion setting or the traffic congestion cancellation of the own station can be performed.

The traffic state setting unit 221 determines the traffic state based on the transaction processing completion rate. At this time, the traffic state setting unit 221 calculates the transaction processing completion rate of the own station using the SIP message received from the large station.

The traffic state setting unit 221 determines whether the own station is in the traffic congestion state or the traffic normal state according to whether the transaction processing completion rate exceeds a predefined threshold. For example, when the transaction processing completion rate is generally 60% or more and the transaction processing completion rate is 30% or less, the traffic state setting unit 221 may determine that the home station is in a traffic congestion state. At this time, the traffic state setting unit 221 sets the predetermined threshold to 30%. The threshold can be applied according to the IMS equipment operation status or service.

Here, a transaction means a bundle of 'Request' and 'Response'. For example, if the initial 'Request' is 'INVITE' and the last 'Response' is 'non-2xx', 'ACK' is also included in the transaction.

The traffic state setting unit 221 determines that the transaction processing is completed when '180 Ringing' or '200 OK' is received for the first session connection request. Accordingly, the traffic state setting unit 221 calculates a transaction processing completion rate by checking reception states of '180 Ringing' and '200 OK'.

Herein, the traffic state setting unit 221 considers the completion as '180 Ringing' is received, but determines that the traffic congestion state or the traffic failure state when the number of '200 OK' is below the average. In addition, the traffic state setting unit 221 determines that the traffic congestion state when the response of '180 Ringing' or '200 OK' is all below a predetermined level.

Next, when a routing message occurs, the traffic controller 223 controls the traffic by using the traffic state information of the called party's session control server obtained at the same time as inquiring the location of the called subscriber to the home subscriber server 120. That is, the traffic controller 223 delivers a routing message to a corresponding destination when the traffic is in a normal state, and performs traffic bypass or traffic gapping when the traffic is in a congested state. That is, the traffic controller 223 determines whether to route the packet according to whether or not traffic congestion is set by the called session control server.

As described above, the traffic state management device 210 and the traffic state notification device 220 provide a traffic management function through the IMS network management function, and the traffic bypass function or call even in the event of a failure or congestion of IMS network elements. The gapping function prevents the spread of faults and improves service availability. That is, the traffic state management device 210 and the traffic state notification device 220 manages the traffic congestion of all the destinations or intervals in which the IMS domain routing is performed, thereby providing a reliable service to the user, and in the IMS network. The stability of the elements can be secured.

3A is a flowchart illustrating a traffic congestion state management method according to an embodiment of the present invention, and FIG. 3B is a flowchart of a traffic congestion release state management method according to an embodiment of the present invention.

First, as shown in FIG. 3A, the home subscriber server 120 installs a traffic state management device 210 (that is, a traffic state management unit 211) to manage a traffic congestion state of a network element. Here, a method of managing the traffic congestion state in the traffic state management apparatus 210 of the home subscriber server 120 on the assumption that the traffic congestion state occurs in the network element 1 will be described.

Network element 1 monitors the traffic state and determines whether the traffic congestion state (S101, S102). At this time, when the network element 1 determines that the traffic congestion state (S102), it transmits a traffic congestion setting (generation) message to the home subscriber server 120 (S103). In addition, the traffic state management device 210 of the home subscriber server 120 transmits a response message (S104). At this time, the traffic state management apparatus 210 of the home subscriber server 120 propagates the corresponding information to at least one network element n related to the traffic congestion setting of the network element 1 so that the traffic congestion state can be set. In this case, the network element n sets the traffic congestion state for the network element 1 (not shown in FIG. 3A).

In particular, the traffic state management device 210 of the home subscriber server 120 transmits the traffic state confirmation message to the network element 1 and receives a response message from the network element 1 (S105 and S106). This is to prevent a traffic state setting error due to a message loss or malicious hacking of IP traffic as described above, and to block a case where a traffic congestion release request is not received.

Meanwhile, as shown in FIG. 3B, the home subscriber server 120 installs a traffic state management device 210 (that is, a traffic state management unit 211) to manage the traffic congestion release state of the network element. Here, a method of managing the traffic congestion canceled state in the traffic state management apparatus 210 of the home subscriber server 120 will be described on the assumption that the traffic congestion canceled state occurs in the network element 1.

Network element 1 monitors the traffic state and determines the traffic state (S151, S152). That is, when the network element 1 determines that the traffic state is normal as a result of the traffic state monitoring, the network element 1 changes the traffic state information stored in the traffic state management device 210 of the home subscriber server 120 (that is, the traffic normal state in the traffic congestion state). In order to transmit the traffic congestion release message to the traffic state management device 210 of the home subscriber server 120 (S153).

The traffic state management apparatus 210 of the home subscriber server 120 changes the traffic state information to the traffic congestion cancel state for the network element 1 while responding to the traffic congestion cancel message to the network element 1 (S154). . At this time, the traffic state management apparatus 210 of the home subscriber server 120 propagates the corresponding information to at least one network element n associated with the release of traffic congestion of network element 1 so that the traffic congestion state can be released (S156, S157). Thereafter, the network element n releases the traffic congestion state for the network element 1 (S158).

Each of the at least one network element n may perform the above-described process independently with the traffic state management apparatus 210 of the home subscriber server 120, similarly to the network element 1. That is, the traffic state management apparatus 210 of the home subscriber server 120 may manage the traffic state by exchanging traffic state information with the network element 1 to the network element n.

4 is a flowchart illustrating a traffic congestion setting and a traffic congestion canceling process in the home subscriber server of FIGS. 3A and 3B.

First, when the home subscriber server 120 receives the traffic congestion setting message from the network element on which the traffic congestion has occurred (S201), it proceeds with the traffic congestion setting for the corresponding network element and responds (S202). At this time, the home subscriber server 120 propagates the traffic congestion state of the network element to the network element associated with the network element (S203).

Thereafter, the home subscriber server 120 periodically transmits a traffic state confirmation message to the corresponding network element (S204). At this time, when the traffic congestion state of the corresponding network element continues (S205), the home subscriber server 120 periodically transmits a traffic state confirmation message to the corresponding network element (S204). This indicates that the home subscriber server 120 transmits a test message for confirming whether the network element continues to be congested.

On the other hand, the home subscriber server 120 releases the traffic congestion state of the network element (S205) in the case of release or no response of the traffic congestion state of the corresponding network element (S206).

5 is a flowchart illustrating an example of an operation of a home subscriber server in call processing.

In this case, a call for establishing a call between an originating terminal located in a local station of network element 1 (ie, a calling party session control server) and a called terminal located in a local station of network element 2 (ie, a called party session control server) through an IMS network. Describe the process.

The calling terminal requests a call to the called terminal to network element 1 (S301). At this time, the network element 1 queries the home subscriber server 120 for the location of the called terminal (S302).

The home subscriber server 120 inquires the location information of the called terminal (that is, the network element 2 accommodating the called terminal) and responds to the network element 1 (S303). At this time, the home subscriber server 120 simultaneously provides the traffic state information of the network element 2 accommodating the called terminal to the network element 1 in the response message.

The network element 1 checks the response message to identify the network element 2 accommodating the called terminal, and then controls the traffic based on the traffic processing policy according to the traffic state information of the network element 2 (S304). Here, the network element 1 indicates a case in which call release is performed according to a traffic processing policy if the traffic element is in a congested state as a result of checking the traffic state information of the network element 2.

On the other hand, network element 1 performs a normal call processing operation according to the original routing procedure if the traffic state is normal as a result of checking the traffic state information of network element 2 (S305 to S313). That is, network elements 1 and 2 perform a series of call processing operations ranging from a call request (S305, S306), a call (S307), and a call release (S308 to S313) between the calling terminal and the called terminal in a conventional manner. .

6 is a flowchart illustrating a traffic control method according to an embodiment of the present invention.

Here, the process of monitoring the traffic state in the network element (that is, the session control server 110) and notifying the traffic state to the home subscriber server 120 will be described.

The network element calculates a traffic processing completion rate by collecting the number of SIP messages generated in the own country (S401, S402).

Thereafter, the network element compares the traffic processing completion rate with a preset threshold (S403), and determines the traffic state according to the comparison result and notifies the home subscriber server 120 (S404 to S409).

First, when the traffic processing completion rate is greater than the threshold (S403), if the previous traffic state is normal traffic (S404), the network element returns to the initial procedure and recalculates the traffic processing completion rate to perform a series of procedures (S401). ). In this case, the previous traffic state is 'normal' and the current traffic state is 'normal'.

Further, when the traffic processing completion rate is greater than the threshold (S403), if the previous traffic state is a traffic congestion state (S404), the network element transmits a traffic congestion release message to the home subscriber server 120 (S405). In this case, the previous traffic state is 'runaway' and the current traffic state is 'normal'.

On the other hand, when the traffic processing completion rate is less than the threshold value (S403), if the previous traffic state is normal traffic state (S406), and transmits the traffic congestion setting message to the home subscriber server (120) (S407). In this case, the previous traffic state is 'normal' and the current traffic state is 'congestion'.

In addition, when the traffic processing completion rate is less than the threshold (S403), if the previous traffic state is a traffic congestion state (S406), since the previous traffic state is a congestion state (that is, already congestion state) periodically, the home subscriber server ( In step 120, the traffic congestion notification message for notifying the traffic congestion state is transmitted (S408, S409). In this case, the previous traffic state is 'congestion' and the current traffic state is 'congestion'.

FIG. 7 is a flowchart illustrating a response process for a traffic congestion status confirmation message in the network element of FIG. 6.

In this case, the network element determines that the traffic is congested, sends a traffic congestion setting message to the home subscriber server 120, and then receives a traffic condition confirmation message from the home subscriber server 120 (see FIG. 3A). Explain.

When the network element receives the traffic congestion status confirmation message from the home subscriber server 120 (S501), it checks the current traffic status (S502).

If the current traffic state is in a normal traffic state (S502), the network element transmits a response message including information indicating that the traffic congestion state is not to the home subscriber server 120 (S503).

On the other hand, if the current traffic state is a traffic congestion state (S502), the network element transmits a response message including the traffic congestion information to the home subscriber server 120 (S504).

8 is a diagram illustrating a format of a DIAMETER message applied to the present invention.

Here, the message formation for the traffic congestion establishment message 601, the traffic congestion release message 602, the traffic state confirmation message 603, and the response message 604 of the traffic state confirmation message is defined through the DIAMETER message format. do.

The traffic congestion setting message 601 is a message for notifying the home subscriber server 120 of the traffic congestion occurrence state from the network element, and the traffic congestion release message 602 is a traffic congestion release state from the network element home subscriber server 120. This is a message to notify.

The traffic condition confirmation message 603 is a message for testing whether or not the traffic congestion condition is continued from the home subscriber server 120 to the network element in the traffic congestion occurrence state, and the response message 604 of the traffic condition confirmation message is from the network element. The message confirms whether the traffic congestion state is continued to the home subscriber server 120.

As such, the traffic state management apparatus 210 and the traffic state notification apparatus 220 exchange information about the traffic congestion setting or release using a specific predefined message and a response message among the DIAMETER messages. In addition, the traffic state management apparatus 210 and the traffic state notification apparatus 220 define and use a new parameter in a message for confirming whether the congestion state continues or in a DIAMETER message.

As such, the traffic state management apparatus 210 and the traffic state notification apparatus 220 may automatically cope with a congestion due to excessive generation of session control traffic such as an internet telephone in the IMS network. That is, the traffic state management device 210 is mounted on the home subscriber server 120 to centrally manage the state of traffic generated in the IMS network, and the traffic state notification device 220 is connected to the session control server 110. It can control traffic congestion status of IMS network through traffic bypass or call gapping in real time according to congestion status.

In addition, one or more large power stations connected to the IMS domain network can know whether each other is congested and can automatically cope with congestion in the network. In addition, the network element that continues to be congested continuously informs the congested traffic congestion, and if the congestion does not receive periodic congestion, the congestion automatically cancels the congestion so that the traffic congestion request is lost in the network. Can be.

Meanwhile, the traffic state management method and the traffic state notification method according to the present invention as described above may be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. The medium may be a transmission medium such as an optical or metal line, a wave guide, or the like, including a carrier wave for transmitting a signal designating a program command, a data structure, or the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Various permutations, modifications and variations are possible without departing from the spirit of the invention.

Therefore, the scope of the present invention should not be construed as being limited to the embodiments described, but should be determined by the scope of the appended claims, as well as the appended claims.

The present invention can be used for traffic condition management and notification of the IMS network.

110: session control server 120: home subscriber server
130: application server 140: multimedia control server
150: media gateway 210: traffic state management device
211: traffic state management unit 212: traffic information provider
213: first information storage unit 220: traffic state notification device
221: traffic state setting unit 222: traffic information request unit
223: traffic controller 224: second information storage unit

Claims (16)

In the traffic state management apparatus of the IMS network,
A traffic state manager for collecting traffic state information of the own station and the large country delivered from the network element and managing the traffic state of the network element;
A traffic information provider for propagating the traffic state of the network element to another network element; And
A first information storage unit for storing traffic state information of the network element and the other network element
Traffic state management device comprising a.
The method of claim 1,
The traffic state management unit,
And receiving traffic state information on the congestion state from the network element, and checking the traffic state of the network element.
The method of claim 2,
The traffic state management unit,
And periodically checking the traffic state of the network element and releasing the traffic congestion state of the network element when the traffic congestion state of the network element is released or no response.
The method according to any one of claims 1 to 3,
The traffic state management apparatus is mounted on a home subscriber server,
And the network element and the other network element are session control servers.
The method of claim 4, wherein
The traffic information provider,
And a traffic state management device for providing the traffic state information of the called party session control server together with the location information of the called party session control server when inquiring the location information of the called terminal by the calling session control server.
In the traffic state notification device of the IMS network,
A traffic state setting unit for monitoring a traffic state of the own station to calculate a traffic processing completion rate to check the current traffic state of the own station, and to notify the traffic state management apparatus of a comparison result between the current traffic state of the own station and the previous traffic state. ; And
Second information storage unit for storing information about the previous traffic state
Traffic state notification device comprising a.
The method according to claim 6,
The traffic state setting unit,
And if the previous traffic condition is congested and the current traffic condition is normal, sending a traffic congestion release message to the traffic condition management apparatus.
The method according to claim 6,
The traffic state setting unit,
And if the previous traffic state is normal and the current traffic state is congested, sending a congestion setting message to the traffic state management apparatus.
The method according to claim 6,
The traffic state setting unit,
And if the previous traffic condition is congested and the current traffic condition is congested, periodically sending a congestion notification message to the traffic condition management apparatus.
10. The method according to any one of claims 6 to 9,
The traffic state management device,
Traffic state notification device for managing the traffic state of the network element by collecting the traffic state information of the own station and the country delivered from the network element.
10. The method according to any one of claims 6 to 9,
A traffic information request unit for requesting traffic state information of another network element to the traffic state management device during a call processing; And
Traffic control unit for controlling traffic according to traffic state information of the other network element
Traffic state notification device further comprising.
The method of claim 11,
The traffic state management apparatus is mounted on a home subscriber server,
The traffic state notification device is mounted on a session control server.
A setting step of collecting traffic state information of the own station and the large station transferred from the network element and setting the traffic state of the network element; And
Propagation step of propagating traffic state of the network element to one or more other network elements
Traffic state management method comprising a.
The method of claim 13,
After the propagation step,
Confirming the traffic state of the network element when the traffic state information of the congestion state is received from the network element
Traffic status management method further comprising.
Determining a current traffic state of the home station by calculating a traffic processing completion rate by monitoring a traffic state of the home station; And
Notification step of notifying the traffic state management device of the comparison result between the current traffic state and the previous traffic state.
Traffic status notification method comprising a.
The method of claim 15,
Requesting traffic state information of another network element to the traffic state management device when a call is processed; And
Performing traffic control according to the traffic state information of the other network element;
Traffic status notification method further comprising.
KR1020100130167A 2010-12-17 2010-12-17 Apparatus and method for managing and notifying traffic status of ims KR20120068514A (en)

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