KR20140079097A - Method and apparatus for load controlling of sgsn - Google Patents

Abstract

The present invention relates to a method and an apparatus for controlling a load, which are capable of controlling a factor which may apply a load to a wideband code division multiplexing access (WCDMS) system in a situation of deleting subscriber information from a service GPRS support node (SGSN), such as initialization of hardware or software in the SGSN of the WCDMS system, and to an apparatus thereof. An apparatus for controlling an SGSN load according to the present invention stores a control table which defines a condition of SGSN overload occurrence in a storage unit. When the apparatus searches the storage unit and the condition of SGSN overload occurrence is satisfied, the apparatus controls a load expectation factor which is expected to apply the load stored in the control table.

Description

[0001] METHOD AND APPARATUS FOR LOAD CONTROLLING OF SGSN [0002]

The present invention relates to a mobile communication system, and more particularly, to a system and method for loading a system in a situation where subscriber information is deleted from the SGSN, such as a hardware or software restart in a service GPRS support node (SGSN) of a wideband code division multiplexing access And more particularly to a load control method and apparatus for controlling an element capable of controlling a load.

A load control function in a general mobile communication system including a wideband code division multiplexing access (WCDMA) system and a service GPRS support node (SGSN) system is a system that loads a load defined by a system when a load specified by a specific device exceeds a threshold Limit the function of the argument so that the load is kept below the threshold.

The SGSN is responsible for the delivery of data packets to and from the user terminal within the service area and performs functions such as packet routing and transmission, mobility management, logical link management, authentication and charging, and the location register included in the SGSN is registered with the SGSN Location information of the GPRS user (cell, visitor location register, etc.), user profile (international mobile station identification number: IMSI), and the like.

In the SGSN, an external factor for imposing a load on the system includes an originating call of a subscriber, a termination call of a subscriber, attach and RA update of a subscriber, and detachment of a subscriber's location. , And signaling occurring between internal software or hardware processes that occur each time these services are triggered can be defined as additional load factors.

When visitor location register (VLR) subscriber information stored in the SGSN is deleted, a high performance processing capability is required to process a location registration request generated from all subscribers at the same time, and a load balancing process should be secured. Otherwise, a load control algorithm is required to maintain the stability of the system. The existing load control algorithm does not include a function to predict the load occurrence and to operate it in advance.

In this way, the existing load control algorithm is likely to change to a state in which continuity of service is difficult to maintain because the load control function operates in a state in which the stability of the system is greatly damaged due to the load factor introduced from the outside In addition, there is a problem that the service processing performance is deteriorated.

Korean Patent Publication No. 10-2010-0002808 (published on Jan. 07, 2010)

The present invention relates to a method and apparatus for controlling a load in a system where a subscriber information is deleted from an SGSN such as a hardware or software restart in a service GPRS support node (SGSN) of a wideband code division multiplexing access (WCDMA) Method and apparatus.

The SGSN load control apparatus of the present invention includes a storage unit for storing a control table defining a condition of a state in which an overload occurs in a service GPRS support node (SGSN); And a control unit for controlling a load prediction factor expected to apply a load stored in the control table when the condition of the overload condition is satisfied by inspecting the storage unit.

Also, the SGSN load control method of the present invention includes the steps of: storing a control table defining a condition of an overload condition in a service GPRS support node (SGSN); And controlling a predicted load factor that is expected to apply a load to the system stored in the control table when the condition of the overloaded condition is satisfied.

According to the present invention, when a state in which a specific factor is expected to cause a load is defined in the system in advance and a transition is made to the corresponding state, the load control process is set to operate regardless of whether the system is overloaded, Can be controlled by the user.

1 is a configuration diagram of a mobile communication system according to an embodiment of the present invention;
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an SGSN load control apparatus.
3 is a diagram illustrating signaling between a user terminal and a SGSN for location registration according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating an application point of an SGSN load control algorithm according to an embodiment of the present invention. FIG.
5 is a flowchart illustrating a procedure of a SGSN load control method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions will not be described in detail if they obscure the subject matter of the present invention.

1 is a configuration diagram of a mobile communication system according to an embodiment of the present invention.

1, in order to provide a packet data service requested by user equipments (UEs) 10 and 20, the user terminals 10 and 20 are connected to a UMTS terrestrial radio access network (UTRAN) 30 or a base station May be connected to a service GPRS support node (SGSN) 50 through a base station system (BSS) 40.

The UTRAN 30 may include radio network controllers (RNCs) for allocating or managing radio resources of Node Bs and corresponding base stations. The UTRAN 30 receives a communication request signal, a data transmission request signal or upload data from the user terminal 10 and transmits the data to the SGSN 50. The UTRAN 30 receives packet data from the SGSN 50, To the mobile terminal (10). A base station system (BSS) 40 may be composed of a base transceiver station (BTS) and a base station controller (BSC), and may transmit a data request signal or the like from the user terminal 20 To the SGSN 50 and to transmit the data received from the SGSN 50 to the user terminal 20. [

The SGSN 50 manages mobility management of the user terminals 10 and 20, an incoming / outgoing call processing procedure and a session for transmitting and receiving packet data for a packet data service, and a home location register (HLR) register 80 to perform authentication and billing functions. Also, the SGSN 50 can perform routing processing function of packet data.

A gateway GPRS support node (GGSN) 60 is a node supporting an IP (Internet Protocol) -based packet network that provides a packet service through an access point node (APN), that is, a connection to the data service network 90 Assign IP addresses to the user terminals 10 and 20 for the packet data service, manage the session, and perform the routing processing function of the packet data. In addition, the GGSN 60 may serve as a gateway with the data service network 90 connected via the APN. Here, the APN is an identifier containing an IP address for connection to the Internet providing packet data, and is used as a delimiter for a specific service. At this time, the SGSN 50 may be connected to the network providing the packet data service through the selected GGSN 60 among the plurality of GGSNs 60.

The HLR 80 may perform an authentication function for a requested user terminal while storing user terminal information, subscriber information of the user terminal, location information, and the like. The domain name system (DNS) server 70 stores information on the domain name and the IP address corresponding thereto, and receives information on the GGSN 60 supporting the specific APN from the SGSN 50 Upon receiving the request, the SGSN 50 can inform the SGSN 50 of the IP address information of the corresponding GGSNs.

UU, Um, Iu, Gb, Gn, Gi and Gr are connected to the respective nodes, i.e., the user terminals 10 and 20, the UTRAN 30, the BSS 40, the SGSN 50, the GGSN 60, 70, the HLR 80, and the data service network 90.

FIG. 2 is a diagram illustrating a configuration of an SGSN load control apparatus according to an embodiment of the present invention. Referring to FIG.

As shown in FIG. 2, the SGSN load control apparatus 100 may include a storage unit 110 and a control unit 120.

The storage unit 110 may store a subscriber information and a control table that defines a condition of an overload condition in the SGSN. The control table includes information on a load factor expected to be loaded due to deletion of subscriber information including a location registration message such as an RA update request, an attach request, etc., And information on the load control method can be defined. However, the contents defined in the control table are not limited to the above embodiments.

The control unit 120 may control a load prediction factor that is predicted to apply a load when the SGSN satisfies the condition defined in the control table. In one embodiment, the control unit 120 periodically checks the storage unit 110 to determine whether the subscriber information is deleted, and when the subscriber information stored in the storage unit 110 is deleted, A count gapping algorithm that controls the RA update request message or the connection request message to allow only a predetermined number of times within a predetermined time and controls the RA update request message or the connection request message not to be allowed within an interval An interval gapping algorithm can be used to control the load factor. However, the method of controlling the load expected factor is not limited to the above-described embodiment.

3 is a diagram illustrating signaling between a user terminal and a SGSN for location registration according to an embodiment of the present invention.

As shown in FIG. 3, the user terminal 10 first transmits an attach request message to the SGSN 50 when the power is turned on (S110). The user terminal 10 can transmit a connection request message according to a predetermined period. In addition, when the location of the user terminal 10 changes, an RA update request message (RA update request) is transmitted (S120). The SGSN 50 which manages the subscriber information restarts the SGSN load control apparatus 100 storing the subscriber information when a re-start occurs and the related process and related devices are initialized and the VLR (visitor location register) subscriber information is initialized A location registration message is generated that includes a connection request or an RA update request. In the case of restarting the SGSN 50 among the above cases, the location registration message may be temporarily received from the user terminal existing in the same area, and the load of the system may increase. In this case, since a lot of system resources are allocated to process the location registration message, processes for processing a call establishment request when a call establishment request is generated from another user terminal are delayed in the CPU occupation and resource allocation portion, May occur or fail, resulting in degradation of the system function.

FIG. 4 is a diagram illustrating an SGSN load control algorithm application point according to an exemplary embodiment of the present invention, and FIG. 5 is a flowchart illustrating a SGSN load control method according to an exemplary embodiment of the present invention.

5, the control unit 120 included in the SGSN load control apparatus 100 periodically checks the storage unit 110 to determine whether a load expected factor has been generated (S210). If it is determined in step S220 that the load predictive factor has been generated, the load predictive factor is controlled using the load control method stored in the control table of the storage unit 110 and the load control execution time. On the other hand, if it is determined that the load expected factor has not been generated, it is checked whether the system is overloaded (S230). If it is determined that the system is overloaded, the overload control is performed (S240). The system overload control method can use a conventional control method.

Although the method has been described through particular embodiments, the method may also be implemented as computer readable code on a computer readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may be implemented in the form of a carrier wave (for example, transmission over the Internet) . In addition, the computer-readable recording medium may be distributed over network-connected computer systems so that computer readable codes can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the above embodiments can be easily deduced by programmers of the present invention.

Although the present invention has been described in connection with some embodiments thereof, it should be understood that various changes and modifications may be made therein without departing from the spirit and scope of the invention as understood by those skilled in the art. something to do. It is also contemplated that such variations and modifications are within the scope of the claims appended hereto.

10, 20: user terminal 30: UTRAN
40: base station system 50: SGSN
60: GGSN 70: DNS server
80: HLR 90: Data service network
100: SGSN load control device 110:
120:

Claims (8)

An SGSN load control device,
A storage unit for storing a control table defining a condition of an overload in a service GPRS support node (SGSN); And
And a control unit for controlling the predicted load factor to be expected to apply the load stored in the control table when the condition of the overloading condition is satisfied by inspecting the storage unit. The method according to claim 1,
Wherein the control table includes:
Information on a time to perform load control, and information on a load control method. The method according to claim 1,
The load expected factor may be calculated by:
An RA update request message or an attach request message. 3. The method of claim 2,
The load control method includes:
A count gapping algorithm for controlling the load prediction factor to a predetermined number of times within a predetermined time or an interval gapping algorithm for controlling the load prediction factor not to be allowed within a minimum interval SGSN load control device. As a SGSN load control method,
Storing a control table defining a condition of an overload in a service GPRS support node (SGSN); And
And controlling a load prediction factor that is predicted to apply a load to the system stored in the control table when the condition of the overload occurrence condition is satisfied. 6. The method of claim 5,
Wherein the control table includes:
And information on a time to perform load control and information on a load control method. 6. The method of claim 5,
The load expected factor may be calculated by:
An RA update request message or an attach request message. The method according to claim 6,
The load control method includes:
A count gapping algorithm for controlling the load prediction factor to a predetermined number of times within a predetermined time or an interval gapping algorithm for controlling the load prediction factor not to be allowed within a minimum interval The SGSN load control method.

Images