KR20100013479A - Method for controlling routing area in mobile communication network and system thereof - Google Patents

Abstract

PURPOSE: A method for controlling routing area in mobile communication network and a system thereof, capable of enhancing system stability are provided to prevent overload of signal link traffic and processor caused by the refresh of routing area and location registration procedure. CONSTITUTION: A plurality of mobile communication terminals(100) creates a request message for performing the routing area update or the attach operation. The plural mobile communication terminals transmit within the core network(300) of the mobile radio communication network to switching nodes(310,320). The switching nodes manage a plurality of mobile communication terminals. The switching nodes transmit the acknowledge message as a response to the request message to a plurality of mobile communication terminals of predetermined rate. According to the traffic load, the switching node controls the acknowledge rate.

Description

METHOD FOR CONTROLLING ROUTING AREA IN MOBILE COMMUNICATION NETWORK AND SYSTEM THEREOF}

The present invention relates to a method and system for managing a routing area in a mobile communication network. More particularly, the present invention relates to a processor and signal link traffic generated due to a membership operation, a routing area update, or a location registration procedure when a large number of subscribers occurs. A routing area management method and system for a mobile communication network capable of preventing overload and distributing load appropriately.

The mobile communication service has been continuously developed starting from the low quality voice call-oriented first generation mobile communication service provided by the analog cellular Advanced Mobile Phone Service (AMPS), which has been in service since the late 1980s.

Second-generation mobile communication services such as digital cellular Global System for Mobile (GSM), Code Division Multiple Access (CDMA), and Time Division Multiple Access (TDMA) enable improved voice calls and low-speed (14.4 Kbps) data services. It was.

The second generation mobile communication service has developed into a third generation mobile communication service capable of multimedia service including Internet service and video. Third generation mobile communication services include TD-SCDMA (Time Division Synchronous), Wideband Code Division Multiple Access (WCDMA), and CDMA 2000. The second generation mobile communication service aims to provide circuit-oriented voice services, while the third generation mobile communication service aims to provide packet data services as well as circuit switched services.

Third generation mobile communication systems include a Mobile Switching Center (MSC) to provide circuit-switched services and a Serving GPRS Support Node (SGSN) to provide packet data services. This works together.

If a failure occurs in MSC or SGSN of the 3rd generation mobile communication system, subscribers of the corresponding switching node are transferred to another backup switching node, and the attachment operation and routing area update of the subscribers are caused by the large transfer of subscribers. Routing Area Update and location registration procedures can occur at the same time, causing processor and signal link traffic overload.

If a heavy load is placed on each processor of the mobile communication network, some call processing may not be performed, and the deepening of signal link traffic may cause an overload of the entire mobile communication network.

Accordingly, the technical problem to be achieved by the present invention is to prevent the overload of the processor and signal link traffic caused by the membership operation, routing area update and location registration procedure of a large number of subscribers when a large number of subscribers are switched due to a system failure. The present invention provides a method and system for managing a routing area of a mobile communication network.

Another technical problem to be achieved by the present invention is to improve the system stability by properly distributing the load for performing the belonging operation, routing area update, and location registration procedure when switching subscribers, and routing of the mobile communication network so that normal call reception can be achieved. It is an object of the present invention to provide an area management method and a system thereof.

Technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above may be clearly understood by those skilled in the art from the following description. There will be.

The routing area management system according to the present invention for achieving the above object is a request message for performing a routing area update or attach operation in a system for managing a routing area of a mobile communication network. Generating a plurality of mobile communication terminals for transmitting to the switching node in the core network of the mobile communication network; And when the request message for wirelessly connecting the plurality of mobile communication terminals to manage the plurality of mobile communication terminals and receiving a routing area update or belonging operation from the plurality of mobile communication terminals, the request message. And a switching node for transmitting a pseudo approval message for a predetermined ratio among the plurality of mobile communication terminals in response to the control, and adjusting the pseudo approval rate according to the traffic load.

An apparatus for managing a routing area according to the present invention is a device for managing a routing area in a mobile communication network, the request message for performing a routing area update or attach operation from a plurality of mobile communication terminals. An acknowledgment / rejection control unit configured to receive a signal and designate a rate of pseudo-approval target among the plurality of mobile communication terminals which transmit the request message, and adjust a pseudo-approval rate according to traffic load; A pseudo approval buffer for storing subscriber information of mobile communication terminals to be pseudo approved; And a pseudo-approval post-processing unit for transmitting a pseudo-approval message to mobile communication terminals which are subject to the pseudo-approval subject according to the command of the approval / rejection control unit.

On the other hand, in the routing area management method according to the present invention, in the method for managing the routing area in the mobile communication network, each of the plurality of mobile communication terminals to perform a routing area update (Routing Area Update) or attach (attach) operation Generating a request message for transmitting to the exchange node in the core network of the mobile communication network; And transmitting, by the exchange node, a pseudo approval message in response to the request message using a predetermined ratio of the plurality of mobile communication terminals as a pseudo approval target.

The method and system for managing a routing area of a mobile communication network according to the present invention made as described above occur when a large number of subscribers are switched due to a system failure, etc., due to the belonging operation of a plurality of subscribers, a routing area update, and a location registration procedure. It is possible to prevent the overload of processor and signal link traffic.

In addition, the method and system for managing a routing area of a mobile communication network according to the present invention improves system stability by properly distributing a load for performing affiliation, routing area update, and location registration procedure when a large number of subscribers are switched, and improves normal call reception. Make it happen.

Hereinafter, a routing area management system of a mobile communication network according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.

1 is a block diagram showing a routing area management system of a mobile communication network according to an embodiment of the present invention.

Referring to FIG. 1, a routing area management system according to an embodiment of the present invention includes a plurality of mobile communication terminals 100, a mobile communication network including a wireless access network 200 and a core network 300.

The mobile communication terminal 100 is managed by an exchange node in the core network 300, such as a Serving GPRS Support Node (SGSN) 310 or a Mobile Switching Center (MSC) 320, and updates a routing area. Alternatively, a request message for performing an attach operation is generated and transmitted to an exchange node such as SGSN 310 or MSC 320.

The wireless access network 200 is a network terminal for connecting the mobile communication terminal 100 to the core network 300 and includes devices for wireless connection such as Node-B and RNC (Radio Network Controller).

The core network 300 is a service network terminal that is responsible for transmitting and exchanging traffic and interworking with an external network. The core network 300 interworks with the wireless access network 200 to provide a voice call to the mobile communication terminal 100, wireless data communication, and message transmission and reception. Provides mobile communication services. The core network 300 includes an MSC 320 for establishing a call path, an SGSN 310 for establishing a wireless data path, a Home Location Register (HLR) 350 for managing subscriber information, and the like. And a Recovery Solution (RS) SGSN 330 and a Recovery Solution (RS) MSC 340 that operate as backup switching nodes of the MSC 320 and the MSC 320, respectively.

Here, the mobile communication network including the wireless access network 200 and the core network 300 may be implemented in various forms such as WCDMA network, HSDPA network, WiBro network, 4G network, the wireless access network 200 and the core network 300 The device included in may vary depending on the type of network, the path of a call, the type of mobile communication terminal 100, and the like.

Due to a failure or the like, a large amount of subscriber changeover occurs from the MSC 320 or the SGSN 310 in the core network 300 to the RS MSC 340 or the RS SGSN 330 as the backup exchange node. In this case, the backup exchange node manages the mobile communication terminals 100 of subscribers managed by the MSC 320 or the SGSN 310 before the transfer.

For example, when a packet call is serviced, subscribers in the VLR (Visitor Location Register) of the SGSN 310 are transferred to the RS SGSN 330 and managed by the RS SGSN 330 when the SGSN 310 fails. Thereafter, each mobile communication terminal 100 generates an affiliation request message for performing affiliation operation or an RAU request message for updating a routing area and transmits it to the RS SGSN 330. The mobile communication terminal 100 transmits a request for belonging to the mobile communication network when the power is turned on, and then transmits a RAU request message to the mobile communication network periodically or whenever there is a movement.

When the circuit call is serviced, the call path of the mobile communication terminal 100 is established via the MSC 320, and in the event of a system failure of the MSC 320, subscribers in the VLR of the MSC 320 to the RS MSC 340. It is transferred and managed by RS MSC 340. After the subscriber transfer, the RS MSC 340 also receives a request message for affiliation operation or routing area update from the mobile communication terminals 100.

When the backup switching node receives a large amount of request messages from the mobile communication terminals 100 at one time due to the large number of subscribers, it is necessary to proceed with the subscriber location registration procedure for too many mobile communication terminals 100 at one time. Therefore, there is a high risk of traffic overload.

In order to prevent such a traffic overload, the backup exchange node that receives a large amount of request messages from subscribers' mobile communication terminals 100 receives a certain percentage of all mobile communication terminals 100 that transmit the request message. In this case, the pseudo-approval message is transmitted to the pseudo-approval target in response to the request message.

That is, the backup exchange node can distribute the traffic appropriately after a predetermined time has elapsed after transmitting the pseudo approval message, instead of immediately performing the registration of the subscribers subject to the pseudo approval at the time when the request message is received. While maintaining the level, the subscriber's location registration procedure is performed sequentially or selectively.

The remaining subscribers, which are not subject to doctor approval, are subject to location registration, and the location registration procedure is directly performed on the mobile communication terminals 100 of the subscribers who are to be registered.

In FIG. 1, the first mobile communication terminal 110 illustrates an example of a terminal of a subscriber to be pseudo approved, and the second mobile communication terminal 120 is a remaining subscriber not to be approved for doctor, that is, a location registration target. It illustrates an example of a subscriber terminal.

The pseudo approval process of the first mobile communication terminal 110 and the instant location registration process of the second mobile communication terminal 120 will be described in more detail with reference to FIGS. 3 to 6.

A backup exchange node such as RS MSC 340 or RS SGSN 330 performs a pseudo approval function by targeting mobile communication terminals 110 of subscribers not registered in its VLR. Here, the ratio of the mobile communication terminal 110 that receives a pseudo approval message among the entire mobile communication terminals 100 that posts a request message for updating the belonging operation or routing area for a predetermined time, that is, the pseudo approval rate is determined by the traffic load. It can be adjusted accordingly.

For example, the backup exchange node may increase the pseudo approval rate for the entire mobile communication terminals 100 as the traffic load increases. In this case, the pseudo approval rate is proportional to the traffic load rate of the processor or the core network 300 in the core network 300 such as the MSC 320 or the SGSN 310, the RS MSC 340, or the RS SGSN 330. Going up In the case where it is difficult to immediately register subscriber location due to heavy traffic load, all mobile communication terminals 100 requesting membership operation or routing area update within a predetermined time may be subject to pseudo approval. The pseudo-approval ratio may be determined by the following equation (1) or by storing a table for calculating the ratio in advance and then selecting an appropriate value from the table according to the degree of load.

y = ax + b

In Equation 1, y is a pseudo approval rate, a is a proportionality constant, x is a traffic load rate, and b is a basic application rate at the pseudo approval function turn-on, and may be zero.

The above-described backup exchange node stores subscriber information of mobile communication terminals 110 to be pseudo-approved in the pseudo-approval buffer 365 (see FIG. 2), and when a certain time elapses after transmitting the pseudo-approval message, traffic load While registering the location registration for the subscribers of the mobile communication terminal 110 stored in the pseudo-acknowledgement buffer 365 sequentially or selectively.

That is, if a large number of subscribers are transferred due to a system failure, and a certain percentage of subscribers is approved, the backup switching node sequentially distributes the loads according to the traffic load conditions. As a result, subscribers perform location registration.

In addition, the backup exchange node designates the remaining mobile communication terminals 120, which are not subject to the doctor's approval, among the plurality of mobile communication terminals 100 requesting the updating of the operation or the routing area, as the location registration target. The mobile communication terminal 120 performs a location registration procedure for immediately registering a location with the HLR 350 in the core network 300.

As such, when a large number of subscribers are transferred to the RS SGSN 330 and the RS MSC 340 due to a system failure such as the SGSN 310 or the MSC 320, the routing area management method is improved to improve the processor and signal link traffic. Overload can be prevented.

The HLR 350 is a database that stores information on subscribers of the mobile communication service. The HLR 350 stores almost all subscriber data at the time of origination, location registration, and reception at the MSC 320 or SGSN 310. It serves to provide, and holds the routing information required for the call to the mobile communication terminal (100). In particular, when the subscriber attempts to register a location, the HLR 350 transmits subscriber information according to a request of the MSC 320 or the SGSN 310, the RS MSC 340, or the RS SGSN 330.

When switching subscribers, the HLR 350 extracts the routing information and transmits it to the VLR of the RS MSC 340 or the RS SGSN 330, so that normal call reception can be made to the mobile communication terminal 100.

The HLR 350 manages the packet call VLR and the circuit call VLR for all subscribers. Since the MSC 320, which is a circuit network, and the SGSN 310, which is a packet network are matched one-to-one, pseudo-approval without unnecessary location registration load is required. Normal call reception may also be made to the mobile communication terminal 110 as a target.

For example, when the mobile terminal 100 of a specific subscriber is transferred to the RS SGSN 330, the RS SGSN 330 immediately registers the subscriber who has sent the packet call to the HLR 350 and generates a packet call VLR. If not, if only the circuit call VLR of the subscriber is correctly stored in the HLR 350, the packet is matched to the VLR of the circuit call in the HLR 350 by the CS dependent PS paging scheme. Paging can be accurate.

According to the circuit dependent packet paging scheme, even when the subscriber location registration is not performed in the RS SGSN 330, voice and short message can be received by the MSC 320 using the circuit call VLR stored in the HLR 350. Since the RS SGSN 330 matching the circuit call VLR is previously defined in the packet call-circuit call table in the HLR 350, the data call paging of the packet call is defined in the packet call-circuit call table. Paging to RS SGSN 330 allows normal call processing.

2 is a block diagram of an apparatus for managing a routing area according to an embodiment of the present invention. The routing area management apparatus 360 is located in the core network 300 of the mobile communication network, and performs a pseudo accept function according to traffic load when the mobile communication terminal 100 requests a membership operation or a routing area update. to be. A backup exchange node, such as RS SGSN 330 or RS MSC 340, which manages subscribers transferred from the exchange node such as SGSN 310 or MSC 320, may operate as the routing area management device 360.

Referring to FIG. 2, the backup exchange node operating as the routing area managing apparatus 360 may include a request identification unit 361, an approval / rejection control unit 362, a pseudo-approval post-processing unit 363, and a location registration post-processing unit 364. And a pseudo approval buffer 365.

When the request identification unit 361 receives request messages for belonging operation or routing area update from the plurality of mobile communication terminals 100, whether the subscriber of each mobile communication terminal 100 has a subscriber registered in its VLR. If there is a subscriber who is not registered in the VLR, the operation of the approval / rejection control unit 362 is initiated to perform a pseudo approval process for some subscribers instead of performing immediate full location registration.

The approval / rejection control unit 362 specifies the ratio of the pseudo-approved subject among the plurality of mobile communication terminals 100 that transmit the belonging request message or the RAU request message within a predetermined time, but according to the current traffic load of the user or the system as a whole. It controls the rate of approval to an appropriate level.

The pseudo approval buffer 365 stores subscriber information of mobile communication terminals 110 to be pseudo approved.

The pseudo-approval post-processing unit 363 transmits a pseudo-approval message to the mobile communication terminals 110 to be pseudo-approved according to the command of the approval / rejection control section 362. When a certain time elapses after the transmission of the pseudo approval message, sequential / or selective location registration is performed for the subscribers of the mobile communication terminal 110 stored in the pseudo approval buffer 365 so as to distribute the traffic load. .

The location registration post-processing unit 364 targets the mobile communication terminals 120 of the plurality of mobile communication terminals 100 except the doctor approval target among the plurality of mobile communication terminals 100 according to the command of the approval / rejection control unit 362. An immediate location registration procedure is performed so that the location of the subscribers can be directly registered with the HLR 350 in the core network 300.

At this time, the location registration procedure is immediately performed for subscribers who are subject to location registration among the subscribers who have sent the membership request message. For subscribers who are subject to location registration among the subscribers who sent the RAU request message, the location registration post-processing unit 364 transmits a RAU rejection message so that the corresponding mobile communication terminals 120 transmit a request for belonging to location registration. Induce. When a request for belonging is received from the mobile communication terminals 120 of the subscriber who is the location registration target in response to the RAU rejection message, the location registration post-processing unit 364 immediately locates the subscribers to the HLR 350 of the mobile communication network. Register.

Hereinafter, a method for managing a routing area of a mobile communication network according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 3 to 6.

After switching, the RS SGSN 330 or the RS MSC 340, after switching, prevents the overload of the processor and the signal link traffic due to a large number of subscriber location registrations. In order to prevent traffic overload, a pseudo-approval message is issued for a routing area update request.

Since the pseudo approval rate is determined according to the traffic load, an immediate location registration procedure may be performed within the appropriate load for the remaining subscribers who are not subject to pseudo approval.

In detail, each of the plurality of mobile communication terminals 100 generates a request message for performing a routing area update or attach operation, so that a backup switching node in the core network 300 of the mobile communication network is generated. To send.

The backup exchange node receiving the request messages of the various subscribers transmits the pseudo approval message in response to the request message with a predetermined ratio among the plurality of mobile communication terminals 100 as the pseudo approval target. In addition, the backup switching node immediately performs the location registration of the subscribers to the HLR 350 in the core network 300 using the rest of the plurality of mobile communication terminals 100 as the location registration target.

3 and 4 are data flowcharts illustrating a method for managing a routing area of a mobile communication network according to an embodiment of the present invention.

The backup exchange node that performs the pseudo approval function may include an RS MSC 340 or an RS SGSN 330. However, for convenience of description, the RS SGSN 330 that provides a packet call service operates as a routing area management device. It is assumed that the approval function is performed.

If a system failure of SGSN 310 occurs in the packet call service, subscribers of SGSN 310 are transferred to RS SGSN 330. RS SGSN 330, which receives the subscriber transfer of SGSN 310, turns on the pseudo-acknowledgement function before the transfer starts.

After the subscribers are transferred from the SGSN 310 which is the switching node in the core network 300 of the mobile communication network to the RS SGSN 330 which is the backup switching node, the mobile communication terminals 100 of the subscribers perform periodic routing area updates. The RSG request message (RAU Request) is transmitted to the RS SGSN 330, and the RS SGSN 330 receives it (S110 and S111). Since the mobile terminal 100 performing periodic location registration by uploading a RAU request message in the SGSN 310 before the transfer, the RAU request message is uploaded to the switched RS SGSN 330, The large number of subscribers transferred to the SGSN 330 generates a large number of RAU requests and sends them to the RS SGSN 330 (for example, 10000 or more can be generated in 5 minutes per meal).

The RS SGSN 330 receiving the subscriber transfer classifies subscribers who are subject to approval and subscribers who are subject to location registration for a large number of subscribers who have uploaded a RAU request message. That is, the RS SGSN 330 that receives the RAU request message from the subscribers who have been transferred, designates a certain ratio among the plurality of mobile communication terminals 100 as a pseudo approval target, and then performs mobile communication targeted for pseudo approval. The subscriber information of the terminals 110 is stored in the pseudo approval buffer 365. As shown in FIG. 4, a RAU pseudo accept message is transmitted to the mobile communication terminal 110 to be pseudo approved in response to the RAU request message (S121).

At this time, the mobile communication terminal 100 of the subscribers not registered in the VLR of the RS SGSN 330 may be a primary object of approval. For example, the RS SGSN 330 may send a RAU Reject message due to implicitly detached only for periodic update requests among all RAU Request messages received, and only for subscribers not in the VLR. RAU pseudo accept message (RAU pseudo Accept) that performs the same function as the RAU accept message (RAU Accept) is issued without (S121).

In addition, depending on the traffic load rate, only a certain ratio is subject to pseudo approval. It is efficient for traffic distribution that the pseudo-approval ratio of the plurality of mobile communication terminals 100 increases as the traffic load increases.

An example of identifying the pseudo-approval subject in more detail is as follows.

RS SGSN 330 is a target of approval for subscribers without a VLR, or a routing area update between SGSNs for subscribers that send a RAU Request message to a 'Packet-Temporary Mobile Subscriber Identity' (P-TMSI). Without judging, it is determined as a subscriber of the failed SGSN 310 before the transfer, and classified as a pseudo approval subject.

If it is determined that the RAU Request message is sent for periodic update after the subscriber in the failed SGSN 310 is transferred, the RS SGSN 330 immediately RAUs the mobile terminal 110 of the subscriber. The RAU pseudo accept message is issued (S121). Here, the RAU pseudo accept message (RAU pseudo Accept) performs the same function as the RAU accept message (RAU Accept), the RS SGSN 330 is information about the subscriber in the pseudo approval buffer 365 therein, for example, Stores International Mobile Station Identity (IMSI).

That is, when the pseudo-authorization function is turned on, the RS SGSN 330 sends a subscriber identification message to subscribers who have issued a RAU request message with a Packet-Temporary Mobile SuRScriber Identity (P-TMSI). After sending the subscriber information such as IMSI, the information about the subscriber is stored in the pseudo approval buffer 365.

At this point, RS SGSN 330 does not immediately perform location registration of subscribers subject to doctor approval. That is, the RS SGSN 330 does not raise the location registration of the subscriber who is the subject of approval to the MSC 320 and the HLR 350, and does not generate the VLR of the subscriber.

Even if the location registration is not made immediately, there is no problem in the reception of subscribers subject to doctor approval. Since the HLR 350 manages the packet call VLR and the circuit call VLR, and the circuit network and the packet network are matched one-to-one, if only the circuit call VLR is exactly stored in the HLR 350, the circuit call VLR in the HLR 350 is stored. Packet paging can be correctly performed to the packet call subscriber matched with.

In FIG. 3, when the mobile communication terminal 120, which is a location registration target, transmits a RAU request message to the RS SGSN 330 for periodic update of the routing area (S110), the RS SGSN 330 is a corresponding subscriber. Confirms that the subscriber is not in the VLR, and sends an RAU reject message (RAU Reject) to the mobile communication terminal 100 on the basis of an implicitly detached (S120). The mobile communication terminal 100 having received the RAU reject message (RAU Reject) immediately posts an attach request message (S130) to the RS SGSN 330 according to the WCDMA standard (S130), and receives the RS SGSN 330 Location registration to the HLR 350 and the MSC 320 is performed (S140 to S170).

Here, the RS SGSN 330 transmits a location update request of the subscriber to the MSC 320 (S140), and receives the response (Location Update Accept) (S150), and the HLR 350. After uploading a location registration request (UpdateGprsLocation) (S160), and receives the information about the subscriber in response (InsertSubscriberData) (S170), and generates a VLR. Similarly, if the backup exchange node is RS MSC 340, RS MSC 340 will perform location registration with SGSN 310 and HLR 350.

When the location registration to the HLR 350 is completed, the RS SGSN 330 transmits an attachment complete message (Attach Complete) to the mobile communication terminals 120 where the location registration is completed (S180). ).

In FIG. 4, after a predetermined time has elapsed, the RS SGSN 330 sequentially or selectively registers the location of the traffic to the subscribers of the mobile communication terminal 110 stored in the pseudo-acknowledgement buffer 365. Do this. The location registration procedure is a process including S140 to S170 of FIG. 3.

At this time, the RS SGSN 330 performs automatic forced location registration for the subscribers of the mobile communication terminal 110 stored in the pseudo-acknowledgement buffer 365 sequentially or according to the traffic load, or the mobile communication terminal 110 which is the target of the pseudo-approval. Location registration may be selectively performed only on the subscribers of the mobile communication terminal 110 in which call origination is performed.

That is, the RS SGSN 330 automatically sends a compulsory location registration message to subscribers stored in the pseudo-acknowledgement buffer 365 after a predetermined time elapses, and sequentially performs the location registration process for several subscribers. In this case, the subsequent processes such as creation and removal of a PDP (Packet Data Protocol) context for call connection are normally performed. In addition, when the forced location registration is not performed, the RS SGSN 330 may perform implicit location registration for outgoing subscribers making a packet call, thereby distributing location registration for multiple subscribers. .

If the backup exchange node is the RS SGSN 330, the RS SGSN 330 performs location registration of subscribers subject to the MSC 320 and the HLR 350. That is, the RS SGSN 330 receives a RAU request message (RAU Request) from the mobile communication terminal 110 of the subscriber to be approved (S111), and then responds with a RAU pseudo accept message (RAU pseudo Accept message) in response. By transmitting (S121), the subscriber is prevented from transmitting the attach request message for the location registration procedure at that time, and does not cause the load of the processor and the signal link traffic.

Here, the subscribers to be pseudo-approved are not specified before the routing area update request, and the RS SGSN 330 is configured to transmit the entire system or its current traffic load, or the received RAU request message to the periodic update request. It is possible to selectively determine whether to approve the target by determining whether or not, whether or not the subscriber without a VLR.

Subsequently, even in the location registration procedure of subscribers subject to doctor approval, when the RS SGSN 330 transmits a Location Update Request to the MSC 320 and receives a Location Update Accept, the HLR After uploading a location registration request (UpdateGprsLocaiton) to (350), and receives the information about the subscriber in the response (InsertSubscriberData), and generates a VLR. Similarly, if the backup exchange node is RS MSC 340, RS MSC 340 performs location registration with SGSN 310 and HLR 350.

5 and 6 are data flow diagrams illustrating a routing area management method of a mobile communication network according to another embodiment of the present invention.

In the figure, it is assumed that the subscriber requests the belonging operation in the WCDMA standard, and the RS SGSN 330 operates as the routing area management device 360 to perform a pseudo approval function.

Referring to FIG. 5, the RS SGSN 330 receives an attach request message from the mobile communication terminal 120 (S210), and in this process, an RNC (not shown) and an HLR (in the wireless access network 200) are transmitted. 350, the authentication information (Send Authentication Info) of the subscriber is transmitted and received (S220). RS SGSN 330 queries the IMSI value (Identity Request) to the mobile communication terminal 120 and confirms the response (S230), and then the authentication request message (Auch & Chiper Request) to the mobile communication terminal 120 Send and receive the response (Auth & Chiper Response) to perform the authentication procedure (S240). After the subscriber authentication is finished, the RS SGSN 330 transmits a location update request to the MSC 320 (S250), and receives a response (Location Update Accept) (S260). Then, after uploading a location registration request (UpdateGprsLocaiton) to the HLR (350) (S270), and receives the information about the subscriber in response (InsertSubscriberData) (S280), and generates a VLR.

If the location registration procedure is immediately performed for all subscribers requesting their own operation without the function of approval, the system becomes unstable due to high traffic load. Therefore, the RS SGSN 330 proceeds with the location registration procedure as shown in FIG. 5 only for some subscribers at the level that does not cause traffic overload, and the other subscribers proceed with the pseudo approval procedure as shown in FIG.

That is, when there is no pseudo approval function, when a large number of subscribers are transferred to RS SGSN 330, all the subscribers who are transferred are requested to belong to RS SGSN 330 at one time, and RS SGSN 330 is short. For all subscribers, a series of location registration procedures (including S250 to S280) as shown in FIG. 5 must be performed. Since this process may cause traffic overload and impair system stability, in order to prevent this, the RS SGSN 330 distributes the traffic load by performing the pseudo approval process as shown in FIG.

Referring to FIG. 6, after the RS SGSN 330 receives an attach request message from the mobile communication terminal 110 of a subscriber to be approved, S211, the reply message is attached. pseudo accept) (S291) to prevent the subsequent procedure for location registration of the subscriber at that time.

When the mobile communication terminal 110 sends an attach request message including information such as Local Area Code (LAC ) / Routing Area Code (RAC) to the RS SGSN 330, the RS SGSN 330 sends the LAC / RAC. The information is checked, and an attachment pseudo accept message is sent according to the verification result.

For example, if the LAC / RAC information is an area included in the corresponding system or the LAC / RAC information is initialized, the RS SGSN 330 belongs to the subscriber's mobile communication terminal 110. Down. If the LAC / RAC information is an area included in the system, when the subscriber posts the location registration to the same area, RS SGSN 330 approves the message to prevent the load because the location registration procedure does not need to be performed again. Down. When the LAC / RAC information comes up with an initialized value, since the location registration fails, the RS SGSN 330 issues a pseudo approval message in order to prevent the load caused by the retry.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that.

Therefore, since the embodiments described above are provided to completely inform the scope of the invention to those skilled in the art, it should be understood that they are exemplary in all respects and not limited. The invention is only defined by the scope of the claims.

The present invention can be usefully applied to the third generation mobile communication service.

The method and system for managing a routing area of a mobile communication network according to the present invention can prevent overload due to location registration when a large number of subscribers are switched, and can appropriately distribute traffic load to improve system stability.

1 is a block diagram showing a routing area management system of a mobile communication network according to an embodiment of the present invention.

2 is a block diagram of a routing area management apparatus according to an embodiment of the present invention.

3 and 4 are data flow diagrams illustrating a routing area management method of a mobile communication network according to an embodiment of the present invention.

5 and 6 are data flow diagrams illustrating a routing area management method of a mobile communication network according to another embodiment of the present invention.

*** Explanation of symbols for the main parts of the drawing ***

100: mobile communication terminal 200: wireless access network

300: core network 310: SGSN

320: MSC 330: RS SGSN

340: RS MSC 350: HLR

Claims (18)

A system for managing a routing area of a mobile communication network, A plurality of mobile communication terminals generating a request message for performing a routing area update or attach operation and transmitting the request message to an exchange node in a core network of the mobile communication network; And When the request message for wirelessly connecting the plurality of mobile communication terminals to manage the plurality of mobile communication terminals and performing a routing area update or affiliation operation are received from the plurality of mobile communication terminals, the request message is transmitted to the request message. And a switching node which transmits a pseudo approval message for a predetermined ratio among the plurality of mobile communication terminals in response to the control, and adjusts the pseudo approval rate according to the traffic load. The method of claim 1, wherein the exchange node, Routing area management system, characterized in that for transmitting the pseudo-approved message to the mobile communication terminal of subscribers not registered in the own VLR. The method of claim 1, wherein the exchange node, The greater the traffic load, the higher the rate of pseudo-approval for the plurality of mobile communication terminals. The method of claim 1, wherein the exchange node, After the subscriber information of the mobile communication terminals to be pseudo-approved is stored in the pseudo-approval buffer and the predetermined time elapses after transmitting the pseudo-approval message to the mobile communication terminals, the traffic load is distributed. Routing area management system, characterized in that the location registration to the mobile communication terminal subscribers stored in the pseudo approval buffer sequentially or selectively. The method of claim 1, wherein the exchange node, Routing area, characterized in that the location registration target of the mobile communication terminals of the plurality of mobile communication terminals that are not the object of pseudo approval among the plurality of mobile communication terminals to immediately register the location to the HLR in the core network Management system. An apparatus for managing a routing area in a mobile communication network, Receiving a request message for performing a routing area update or attach operation from a plurality of mobile communication terminals, and the ratio of the pseudo-approved subject among the plurality of mobile communication terminals that have transmitted the request message Approved / rejected control to specify a, but adjusts the pseudo-approved ratio according to the traffic load; A pseudo approval buffer for storing subscriber information of mobile communication terminals to be pseudo approved; And And a pseudo-approval post-processing unit for transmitting a pseudo-approval message to mobile communication terminals which are subject to the pseudo-approval subject according to the command of the approval / rejection control unit. The method of claim 6, wherein the pseudo approval post-processing unit, When a predetermined time elapses after the pseudo-acknowledgement message is transmitted, a routing area for performing sequential / or selective location registration for the mobile communication terminal subscribers stored in the pseudo-acknowledgement buffer so as to distribute traffic load. Management device. The method of claim 6, When the request message for performing a routing area update or affiliation operation is received from the plurality of mobile communication terminals, it is determined whether the subscriber of each mobile communication terminal is a subscriber registered with the VLR, and the subscriber not registered with the VLR. In the case of the routing area management device further comprises a request identification unit for starting the operation of the approval / rejection control. The method of claim 6, Routing further includes a location registration post-processing unit for immediately registering the location registration target mobile communication terminals of the plurality of mobile communication terminals other than the pseudo-approved of the plurality of mobile communication terminals to the HLR in the core network according to the command of the approval / rejection control unit; Zone management device. In the method for managing a routing area in a mobile communication network, Generating, by each of the plurality of mobile communication terminals, a request message for performing a routing area update or attach operation, and transmitting the request message to an exchange node in the core network of the mobile communication network; And The exchange node wirelessly connected to the plurality of mobile communication terminals transmits a pseudo approval message in response to the request message using a predetermined ratio of the plurality of mobile communication terminals as a pseudo approval target, depending on the traffic load. Routing area management method comprising the step of adjusting the pseudo-approved rate. The method of claim 10, wherein in the approval step, Routing area management method characterized in that the mobile communication terminals of subscribers that are not registered in the VLR of the switching node are subject to pseudo approval. The method of claim 10, wherein in the approval step, The pseudo approval rate for the plurality of mobile communication terminals is increased as the traffic load increases. The method of claim 10, And storing, by the exchange node, subscriber information of mobile communication terminals to be pseudo approved in a pseudo approval buffer. The method of claim 13, And after the predetermined time has elapsed, performing the location registration for the mobile communication terminal subscribers stored in the pseudo-acknowledgement buffer while the switching node distributes the traffic load. The method of claim 14, The exchange node performs automatic forced location registration sequentially according to the traffic load for the mobile communication terminal subscribers stored in the pseudo-acknowledgment buffer, or only for mobile communication terminal subscribers in which call origination is performed among the plurality of mobile communication terminals. Routing area management method characterized in that performing the location registration selectively. The method of claim 14, If the exchange node is an SGSN, the SGSN performs a location registration procedure to the MSC and the HLR. The method of claim 14, If the backup exchange node is an MSC, the MSC performs a location registration procedure with SGSN and HLR. The method of claim 10, And performing, by the exchange node, location registration of the mobile communication terminals which are the location registration targets with the HLR in the core network using the rest of the plurality of mobile communication terminals as the location registration targets. .

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