KR101000644B1 - Method for controlling terminated message over-load and mobile telecommunication system for the same - Google Patents

Abstract

A method capable of controlling overload of an incoming SMS / MMS message and a mobile communication system therefor are disclosed. According to the present invention, by setting a message processing rate for overload control for each packet switch (SGSN), when receiving a message from a packet mobile service switching center (GMSC) to the packet switch belonging to the subscriber, the packet switch (SGSN) is a message processing rate Based on this, it rejects the message processing for the incoming message of the control target. At this time, for the incoming message to be controlled, the packet exchanger sends its congestion information (SGSN Congestion) to the GMSC in a response message to the incoming message processing request from the GMSC. The GMSC periodically updates and manages the congestion information of each packet exchanger and the congestion information of an incoming message bypass target exchange (MSC) for each packet exchange, and at the time of congestion of the packet exchange to which the subscriber belongs, the incoming message of the packet exchanger. The incoming message of the control target is transmitted to the bypass target exchange, or when the incoming message bypass target exchange is congested, the incoming message of the control target is held. Upon decongestion of the packet switch, the GMSC retransmits an incoming message to be controlled to the packet switch.

SMS, MMS, Overload Control, SGSN, Mobile Network

Description

Incoming message overload control method and a mobile communication system therefor {METHOD FOR CONTROLLING TERMINATED MESSAGE OVER-LOAD AND MOBILE TELECOMMUNICATION SYSTEM FOR THE SAME}

The present invention relates to an incoming message overload control of a mobile communication system, and more particularly, when an incoming message (SMS, MMS, etc.) flows over a reference load in a mobile communication system, a method for controlling the overload occurs before an overload occurs. It is about.

In the mobile communication field, the number of mobile terminal users has increased rapidly. The increase of users has led to the rapid development of the mobile communication field, and thus the users' desire for the quality of mobile communication services has increased. In order to satisfy the needs of users, service providers provide various additional services. One such supplementary service is a messaging service.

The messaging service exchanges simple text messages between SMS subscribers using Short Message Service (SMS) or multimedia messages such as long text messages, pictures, sounds, and videos using MMS (Multimedia Messaging System). To receive it. SMS refers to a two-way text service that can send and receive short messages between mobile communication terminals. This allows a subscriber to receive a message through a public telephone network, data communication network or the Internet when the subscriber sends a short sentence of 255 bytes of information to another mobile communication subscriber in Korean or English including numbers or symbols. In the case of SMS messages, the maximum editing amount is limited to 255 bytes, but in the case of MMS messages, the editing amount of messages is increasing gradually, such as the maximum editing amount reaching 10,000 characters.

By the way, SMS and MMS messages are particularly heavy traffic on certain days, such as Valentine's Day, White Day, Christmas Eve (December 24), Holidays, Admission, First Snow, and the last day of the year (December 31). Occurs. As the message usage increases, the amount of messages to be processed by each device of the mobile communication system increases, and the device may crash due to the amount of such messages exceeding the throughput of the corresponding device. In particular, a Serving GPRS Support Node (SGSN) that supports session management and mobility management for subscribers to support the packet data service of a subscriber may request more than the message processing capability that it can handle. There is a problem in that it does not perform other packet service processing for processing, thereby causing service failure and processor load for other packet services, causing overload.

An object of the present invention is to provide a method for controlling an incoming message (SMS, MMS, etc.) in the mobile communication system before the overload occurs, if the incoming message (SMS, MMS, etc.) is more than the reference load, and a mobile communication system therefor.

According to one aspect of the present invention, a method and a mobile communication system for controlling an overload of an incoming SMS / MMS message are disclosed. According to the present invention, a message processing rate for overload control is set for each packet switch (SGSN), so that when a message is received from a GMSC (Gateway Mobile Service Switching Center) to a packet switch to which a subscriber belongs, the packet switch (SGSN) has a message processing rate. Based on this, it rejects the message processing for the incoming message of the control target. At this time, for the incoming message to be controlled, the packet exchanger sends its congestion information (SGSN Congestion) to the GMSC in a response message to the incoming message processing request from the GMSC. The GMSC periodically updates and manages the congestion information of each packet exchanger and the congestion information of an incoming message bypass target exchange (MSC) for each packet exchange, and at the time of congestion of the packet exchange to which the subscriber belongs, the incoming message of the packet exchanger. The incoming message of the control target is transmitted to the bypass target exchange, or when the incoming message bypass target exchange is congested, the incoming message of the control target is held. Upon decongestion of the packet switch, the GMSC retransmits an incoming message to be controlled to the packet switch.

According to the present invention, the SGSN system is overloaded on a specific day when users who use SMS / MMS messages in a mobile communication network are rapidly increased, thereby blocking factors that may affect other packet services and location registration services. Thus, there is an advantage that can provide uninterrupted service to mobile subscribers and service providers. In addition, by blocking excessive message early, there is an advantage that can provide a stable system for the equipment provider, and a stable packet data service for the mobile service provider.

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 diagram schematically illustrating a configuration of a mobile communication system for a messaging service to which the present invention is applied.

A user equipment (UE) 10 is carried and carried by a user, and the synchronous mobile communication network (CDMA) and the asynchronous mobile communication network (W-CDMA), public telephone network (PSTN), and wired / wireless LAN (LAN). , A terminal capable of SMS or MMS (eg, PDA, handheld PC, notebook, cellular phone, IP phone, etc.) via wired or wireless Internet, etc., using forward channel when receiving a call and reverse channel ( Reverse Channel) is used, and any terminal capable of sending or receiving SMS or MMS is not limited. In the following embodiment, a description will be given on the assumption of asynchronous mobile communication network (W-CDMA).

In the case of W-CDMA, since there is a mutual interface between a circuit network and a packet network (eg, a general packet radio service (GPRS) network), the mobile communication terminals 11 and 12 may use a circuit-based telephone service. And packet services are available. Here, the circuit network is a network structure for providing a voice service, and a network includes a base station related device 20, a mobile switching center (MSC) 30, and the like. In particular, a GPRS network is a network structure for providing a packet service. The network is composed of a base station related device 20, a packet switch (SGSN: Servinvg GPRS Support Node) / packet network gateway (GGSN: Gateway GPRS Support Node) 40, etc., by the mobile communication terminals (11, 12) Is approached.

A base station-related device 20, such as a base station (BTS or Node-B), a base station controller (BSC) / radio network controller (RNC), and the like, has a voice service between the mobile communication terminals 11 and 12 and the switching center (MSC) 30. And the packet data transmission and buffering between the mobile communication terminals 11 and 12 and the packet switch (SGSN) / packet network gateway (GGSN) 40, and the packet data is transmitted to the mobile communication terminal 11 in the GPRS network. It also paging when sent to (12). In this case, the base station can support a circuit-based telephone service and a packet service, and transmits radio signals and traffic to a circuit network or a GPRS network, or delivers voice data of a circuit network or packet data of a GPRS network to a mobile communication terminal. The base station controller / wireless network controller accepts the functions of the existing exchange (MSC) as it is, controls and manages one or more base stations, and performs traffic and signaling methods related to call processing, mobility management, and mobile terminal management.

The packet switch 40 is referred to as a Servevg General Packet Radio Service (SGSN) Support Node (SGSN) in a 3G communication network of a Wideband Code Division Multiple Access (W-CDMA) scheme, and a packet data support node (PDSN) in a 2G CDMA network. The packet network gateway 40 is referred to as a gateway GPRS support node (GGSN) in a W-CDMA 3G communication network and a packet data gateway node (PDGN) in a 2G CDMA network. The packet switch 40 is a node supporting a packet service, and serves as a signal and traffic transfer between a base station and a packet network gateway. In addition, the packet switch 40 provides a session management and mobility management function for the subscriber to support the packet data service of the GPRS subscriber. In addition, the packet switch performs the function of the end of the packet network gateway and GPRS Tunneling Protocol (GTP), which is the tunneling protocol of GPRS. The packet network gateway 40 serves as a gateway with the Internet. That is, the packet network gateway 40 performs a gateway function of the GPRS network.

The InterWorking Mobile Service Switching Center (IWMSC) / Gateway Mobile Service Switching Center (GMSC) 50 is a server that typically resides in a mobile communication network, and with a message center (SMS-SC, MMS-SC) 60 in the mobile communication network. Relays SMS / MMS transmission and reception. IWMSC is involved in SMS / MMS origination processing, and GMSC is involved in SMS / MMS incoming processing.

The Message Center (SMS-SC, MMS-MC) 60 is connected to the IWMSC / GMSC 50 to play a key role in the SMS / MMS routing function, set SMS / MMS parameters, and enter incoming SMS / MMS messages. It analyzes the destination address and sends it to the corresponding network element.

The Home Location Register (HLR) 70 has information such as subscriber information, IP priority, and resource and authority usage for interdomain services.

For the outgoing SMS / MMS messaging service, the packet switch (SGSN) 40 forwards the outgoing SMS / MMS message to the IWMSC 50 upon receiving the mobile subscriber's SMS / MMS service request from the base station related device 20. . The IWMSC 50 forwards the outgoing SMS / MMS message of the mobile subscriber to the message center 60. The message center 60 transmits the outgoing SMS / MMS message to the corresponding terminal (the receiving terminal 12 may be a terminal capable of receiving other SMS / MMS).

In the present invention, since an incoming SMS / MMS message is targeted, no limitation is placed on the terminal of the calling party. That is, the originating terminal may be the mobile communication terminal 11, or any other terminal capable of SMS / MMS transmission.

For the incoming SMS / MMS messaging service, the message center 60 delivers the incoming SMS / MMS message requested by the SMS / MMS capable terminal 11 or other SMS / MMS capable terminal to the GMSC 50. The GMSC 50 queries the home location register 70 to confirm the location of the packet switch 40 to which the destination terminal 12 belongs, and transmits an outgoing SMS / MMS message to the packet switch 40. When the packet switch 40 receives the SMS / MMS service request of the mobile subscriber from the GMSC 50, the packet switch 40 delivers the requested incoming SMS / MMS message to the base station related device 20. The base station related device 20 transmits an SMS / MMS message to the destination terminal 12 of the subscriber. At this time, the packet switch 40 communicates with the message center 60 using the Mobile Application Part (MAP) protocol defined in 3GPP, and communicates with the destination terminal 12 through a GPRS Mobility Management (GMM) message.

Particularly, in the present invention, the packet switch 40 grasps its overload state and induces an incoming SMS / MMS message to the MSC 30 when it is overloaded (strictly in the pre-overload stage), and when it is not overloaded, the called terminal. Determining the location of the (12) and delivers the incoming SMS / MMS message to the base station associated device 20 to which the terminal 12 belongs. To this end, the GMSC 50 periodically updates and manages the status information of the packet switch 40. In case of an SMS message, the status information is set to 'SGSN Congestion' in the "Cause of User Error" in the response message (MAP-MT-FORWARD-SHORT-MESSGE ACK) transmitted by the packet exchanger 40 for an incoming SMS message. Is sent. In one embodiment, when the "incoming SMS message processing rate is set to 90% and the overload control rate is 10%" set in the packet exchanger 40, the packet exchanger 40 corresponds to 90% of the incoming SMS message is normal. (Steps 205 to 211 of FIG. 2), and the incoming SMS message corresponding to the remaining 10% is set to "Cause = SGSN Congestion of User Error in MAP-MT-FORWARD-SHORT-MESSGE ACK" and then the GMSC 50 (Step 204 of FIG. 2) reject the message processing request. For example, when the packet exchanger 40 views the incoming SMS message processing rate processed by the packet exchanger 40 as 100%, the packet exchanger 40 determines the incoming SMS message of 10% as the incoming SMS message to be controlled (incoming SMS message processing rate). 90%: overload control rate 10%). GMSC 50, which has received the message set to “Cause = SGSN Congestion of User Error in MAP-MT- FORWARD-SHORT-MESSGE ACK,” requests processing of the incoming SMS message to the exchange 30 to bypass the incoming SMS message. After a certain time, the packet switch 40 may request again. The bypass processing of the incoming SMS message will be described later.

First, referring to FIG. 2, the overload control process of the incoming message is as follows. This assumes an incoming SMS message.

When the message center 60 forwards the incoming SMS message (MAP-MT-FORWARD-SHORT-MESSAGE) requested by the SMS-capable terminal 11 or other SMS-capable terminal to the GMSC 50, the GMSC 50 is the home location register. Query (70) to determine the location of the packet switch 40 to which the destination terminal 12 belongs, and transmits the outgoing SMS / MMS message to the packet switch (40) (201).

 Upon receiving the SMS message processing request (MAP-MT-FORWARD-SHORT-MESSAGE reception) from the GMSC 50, the packet switch 40 checks the status of the SMS message control function (202). If the SMS control function is ON, the processor checks whether the processor for processing the SMS message is overloaded (203).

If the 'overload control rate 10%: incoming SMS message processing rate 90%' is set, the packet switch 40 normally processes the incoming SMS message corresponding to 90% (205 to 211). Specifically, the packet switch 40 transmits a paging request to the destination terminal 12 for the location information confirmation and the signal connection request to deliver the SMS message to the subscriber (205), and the incoming call is received. The terminal 12 transmits a paging response message (paging response) to the packet switch 40 (206) and establishes a connection with the packet switch 40. After establishing the connection, the packet exchanger 40 delivers the incoming SMS message to the terminating terminal 12 in CP-DATA format (207), and the terminating terminal 12 delivers the CP-ACK to the packet exchanger 40 ( 208) Announce that the incoming SMS message was well received. When the packet exchanger 40 successfully completes the transmission of the incoming SMS message with the destination terminal 12, after releasing the connection with the destination terminal 12 (208, 209), the incoming SMS message is successfully sent to the GMSC 50. Notify that it has been delivered (MAP-MT-FORWARD-SHORT-MESSAGE ACK) 211.

However, when the incoming SMS message processing rate processed by the packet switch 40 exceeds 90%, the received SMS message is received in the response message (MAP-MT-FORWARD-SHORT-MESSGE ACK). Set "SGSN Congestion" to "Cause" and transmit (204) to reject the incoming SMS message processing request. By doing so, the overload of the packet switch 40 can be prevented in advance. The incoming SMS message processing rate can be arbitrarily set by the operator. For example, when SMS messages are congested and overload is expected, the control rate is sequentially increased from 10% to 20%. Down to release it. In this way, the overload caused by the rapid inflow of SMS messages can be controlled.

The GMSC 50, which has received the message set to “Cause = SGSN Congestion of User Error in MAP-MT-FORWARD-SHORT-MESSGE ACK”, requests the exchange 30 to bypass the incoming SMS message or a predetermined time has passed. It can then re-request to the packet switch 40. In order to bypass the incoming SMS message to the exchange 30, the GMSC 50 periodically updates and manages the status information (MSC Congestion information) of the exchange 30. In case of an SMS message, the status information is transmitted by setting 'MSC Congestion' to “Cause of User Error” in the response message (MAP-MT-FORWARD-SHORT-MESSGE ACK) transmitted by the exchange 30 for an incoming SMS message. do. When the packet exchanger 40 and the exchanger 30 transmit their congestion information, the packet exchanger 40 sets the preset incoming SMS processing rate (eg, 'overload control rate 10%: incoming SMS message processing rate 90%'). If set to, the congestion information (SGSN Congestion) is transmitted based on when the incoming SMS message exceeds 90%, but the exchange 30 is based on the congestion information (100%) based on its incoming SMS message processing capacity (100%). MSC Congestion) is transmitted.

Accordingly, the GMSC 50 checks the current situation (SGSN Congestion information) of the packet switch 40 and then checks the current situation (MSC Congestion information) of the exchange 30 to be bypassed, so that the packet switch 40 is congested. If the exchange 30 to be bypassed is not crowded, request processing of an incoming SMS message to the exchange 30, and if both the packet exchange 40 and the exchange 30 to be bypassed are congested, the packet exchange is waited for a predetermined time. 40) may re-request the processing of the incoming SMS message. At this time, the re-request is made when the control rate is adjusted down by the packet switch 40 according to the overload release. Since the incoming SMS message is controlled from an early stage, it does not take long for the overload to be released.

Failure Cause of MAP message (MAP-MT-FORWARD-SHORT-MESSAGE) for overload control of packet switch 40 is not defined in 3GPP 29.002 MAP standard as follows.

Therefore, it is necessary to newly add Cause (Cause no. 23: "SGSN Congestion", Cause no. 24: "MSC Congestion") to User Error of 3GPP 29.002 MAP standard as shown in FIG.

In the above, the incoming SMS message is taken as an example, but the overload control of the packet switch 40 can be similarly performed for the incoming MMS message.

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.

1 is a diagram schematically illustrating a configuration of a mobile communication system for a messaging service to which the present invention is applied.

2 is a flowchart illustrating an incoming message overload control process according to an embodiment of the present invention.

3 is an explanatory diagram showing the form of User Error added to the 3GPP 29.002 standard according to an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

11,12: call origination terminal (UE) 20: base station related devices

30: Switch Exchanger (MSC) 40: Packet Switcher (SGSN)

50: GMSC / IWMSC 60: Message Center (SMS-MC / MMS-MC)

70: home position register (HLR)

Claims (11)

delete delete An incoming message overload control method in a mobile communication system, a) setting a message processing rate for overload control for each packet switch (SGSN); And b) when the message is received from the GMSC (Gateway Mobile Service Switching Center) to the packet switch to which the subscriber belongs, the packet switch rejecting the message processing for the incoming message to be controlled based on the message processing rate, In step b), for the incoming message of the control target, the packet exchanger sends its congestion information (SGSN Congestion) to the GMSC in a response message to the incoming message processing request from the GMSC, The GMSC periodically updates and manages congestion information of each packet exchange and congestion information of an incoming message bypass target exchange (MSC) for each packet exchange. The method of claim 3, When the subscriber is congested in the packet switch, the GMSC further comprises the step of transmitting the incoming message of the control target to the incoming message bypass target exchange of the packet switch. The method of claim 4, wherein And upon the congestion of the incoming message bypass target exchange, the GMSC holding the incoming message of the controlling object. The method of claim 5, And re-transmitting, by the GMSC, an incoming message of the control target to the packet exchange when the congestion of the packet exchange is cleared. The method according to any one of claims 3 to 6, The message is an SMS or MMS message, incoming message overload control method. As a mobile communication system, Store and manage the message processing rate for overload control, and when receiving a message from the GMSC (Gateway Mobile Service Switching Center) to the packet switch to which the subscriber belongs, reject the message processing for the incoming message to be controlled based on the message processing rate Multiple packet switch (SGSN); Congestion information of each packet exchanger and congestion information of an incoming message bypass target exchanger are periodically updated and managed for each packet exchanger, and when the packet exchange to which the subscriber belongs is congested, the control target is controlled by the incoming message bypass target exchange of the packet exchanger. The GMSC for transmitting an incoming message of the GMSC; And And an incoming message detouring target exchange (MSC) for transmitting an incoming message of the controlling object to a subscriber. The method of claim 8, For the incoming message of the control target, the packet exchange unit sends its congestion information (SGSN Congestion) to the GMSC in a response message to the incoming message processing request from the GMSC. The method of claim 8, The GMSC is configured to hold an incoming message of the control target when the incoming message bypass target exchange is congested, and retransmit the incoming message of the control target to the packet exchange when the GMSC releases the congestion of the packet exchange. A mobile communication system further comprising. The method according to any one of claims 8 to 10, And the message is an SMS or MMS message.

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