KR101523438B1 - Apparatus, Method, and Recording Medium for controlling Traffic Overload in LTE System - Google Patents

Abstract

An embodiment of the present invention relates to a technique for traffic overload control in an LTE system that enables traffic overload control by APN (Access Point Name) based on eNB in an LTE system. A method for traffic overload control in a system, the method comprising: (a) transmitting traffic including at least one of identification information, APN information, congestion level information, and APN AMBR for an eNB to be controlled; Generating a control table; And (b) when the identification information of the eNB is received through a Modify Bearer Request (MBR) message, traffic control information (APN AMBR) is transmitted based on the received eNB identification information and the generated traffic control table The method of claim 1, wherein the step (b) comprises the steps of: (a) receiving the traffic control information from the eNB; And performing traffic control according to the previously generated traffic control information if it is the same as the identification information of the previously received eNB.

Description

[0001] Apparatus, method, and recording medium for traffic overload control in an LTE system [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for traffic control in an LTE (Long Term Evolution) system, and more particularly, to an LTE system for controlling traffic overload by APN To a device, a method, and a recording medium for traffic overload control of the traffic.

In general, in the LTE system, a variety of location-based PCC control schemes are performed according to the 3GPP standard, and a traffic overload control scheme based on ECCI (Enhanced Cell Global Identity) is proposed and performed.

However, according to the existing ECGI-based traffic overload control method, since the cell coverage area is divided very precisely, the location change event occurs very frequently at the time of the subscriber movement, so that the signaling between the eNB, MME, SGW, PGW, The PDN-GW controls the overload of the traffic to the corresponding terminal through the message transmission / reception between the Policy and Charging Rule Function (PCRF), which manages the policy and the charging rule, so that the PCRF failure or response delay The overload control for the corresponding traffic can not be performed. Moreover, it is difficult to distinguish the IMS service from the general Internet service in the traffic overload control, and it is difficult to guarantee the IMS service such as VoLTE and VT.

Published Japanese Patent Application No. 10-2013-0015529 (published Feb. 14, 2013)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to prevent signaling overload between an eNB, an MME, an SGW, a PGW and a PCRF at the time of traffic overload control, And to provide a device, a method, and a recording medium for traffic overload control in an LTE system, capable of performing traffic overload control by distinguishing an IMS service and a general Internet service.

In order to achieve the above object, an apparatus for traffic overload control in an LTE system according to an aspect of the present invention includes an identification information of an eNB to be controlled, APN information, congestion level information, and an APN AMBR A control table generation unit for generating a traffic control table including the above information; And an MBR (Modify Bearer Request) message, generates traffic control information based on the received identification information of the eNB and the generated traffic control table, and transmits the generated traffic And a control performing unit for performing traffic control according to the control information.

The received identification information of the eNB may be transmitted from the SGW through the Private Extension field of the MBR message.

For example, if the currently received eNB identification information is registered in the traffic control table and is identical to the previously received eNB identification information, the control performing unit may perform traffic control according to previously generated traffic control information If the identification information of the currently received eNB is registered as a control target in the traffic control table and is not the same as the identification information of the previously received eNB, The traffic control information may be received from the PCRF based on the congestion level information set (communicating with the PCRF), and the traffic control may be performed according to the received traffic control information. The congestion level information Is delivered to the PCRF via the VS AVP field of the CCR-U (Credit Control Request-Update) message, Information can be received from the PCRF via the QoS_Information field of the Credit Control Answer-Update (CCA-U) message.

As another example, if the traffic control information is not received from the PCRF, the control performing unit may obtain traffic control information corresponding to the congestion level information in the traffic control table, The traffic control can be performed.

In another example, when the currently received eNB identification information is not registered as a control target in the traffic control table and the corresponding eNB is currently under traffic control, the control performing unit transmits traffic control information from the PCRF (communicating with the PCRF) And can release the traffic control according to the received traffic control information, and the traffic control information can be received from the PCRF through the QoS_Information field of the Credit Control Answer-Update (CCA-U) message.

As another example, if the traffic control information is not received from the PCRF, the control performing unit may acquire the traffic control information set in the traffic control table, and release the traffic control according to the obtained traffic control information.

For example, the control unit may perform traffic control when the corresponding APN is an Internet service and not perform traffic control when the APN is an IMS service.

According to another aspect of the present invention, there is provided a method for traffic overload control in an LTE system, the method comprising the steps of: (a) transmitting identification information, APN information, congestion level Congestion Level < / RTI > information, and APN AMBR; And (b) when the identification information of the eNB is received through a Modify Bearer Request (MBR) message, traffic control information (APN AMBR) is transmitted based on the received eNB identification information and the generated traffic control table The method of claim 1, wherein the step (b) comprises the steps of: (a) receiving the traffic control information from the eNB; And performing traffic control according to the previously generated traffic control information if it is the same as the identification information of the previously received eNB.

If the currently received eNB identification information is registered in the traffic control table and is not the same as the previously received eNB identification information, the step (b) (D) receiving traffic control information from the PCRF based on congestion level information set in the control table (communicating with the PCRF), and performing traffic control according to the received traffic control information; ) Acquiring traffic control information corresponding to the congestion level information in the traffic control table when the traffic control information is not received from the PCRF, and performing traffic control according to the obtained traffic control information ), If the identification information of the currently received eNB is not registered as a control target in the traffic control table and the corresponding eNB is currently (F) receiving traffic control (release) information from the PCRF in case of traffic control (communicating with the PCRF) and releasing traffic control according to the received traffic control (release) information, and in step (f) (G) of acquiring traffic control (release) information set in the traffic control table and releasing traffic control according to the acquired traffic control (release) information when no traffic control And may include one or more.

In step (d), the congestion level information is transmitted to a PCRF through a VS AVP field of a CCR-U message, and the traffic control information is transmitted to a credit control answer- Update message from the PCRF through the QoS_Information field.

In step (f), the traffic control (release) information may be received from the PCRF through a QoS_Information field of a Credit Control Answer-Update (CCA-U) message.

In the step (b), traffic control may be performed for each APN received from the terminal, traffic control may be performed when the APN is an Internet service, and traffic control may not be performed if the APN is an IMS service.

According to another aspect of the present invention, there is provided a computer readable recording medium storing a program for causing a computer to execute a method for traffic overload control in the LTE system.

As described above, according to various aspects of the present invention, eNB IP can be included in a Modify Bearer Request (MBR) message transmitted from the SGW to the PGW using a Private Extension IE field, and eNB IP APN-AMBR can be set for each APN, and the congestion level can be set for each eNB IP in the PGW. In case of PGW unlinked or response delay in the traffic control in the PGW, the APN-AMBR value set in the PGW The PGW can transmit the congestion level of the corresponding eNB using the VS (Vendor Specific) AVP message when the PGW transmits the CCR-U message to the PCRF, and the PCRF can transmit the congestion level The APN-AMBR value can be transmitted by the PGW in accordance with the level (congestion level). If the PGW moves in the traffic control state and the UE moves to the eNB that is not the control target, When the CRF is not operating or the response delay occurs, the APN-AMBR initial value stored in the PGW may be applied to release the traffic control.

Therefore, in the traffic overload control, eNB identification information having a larger coverage than the existing ECGI information is used, thereby preventing signaling overload between the eNB, the MME, the SGW, the PGW, and the PCRF. In case of a failure or response delay of the PCRF, The traffic overload control can be performed through the control table, and the traffic overload control can be performed by distinguishing between the IMS service and the general Internet service, so that the Internet data traffic can be controlled while the IMS service such as VoLTE can be guaranteed .

1 is a configuration diagram of an LTE system according to an embodiment of the present invention;
2 is a configuration diagram of an apparatus for traffic overload control in an LTE system according to an embodiment of the present invention,
3 is a flowchart of a method for traffic overload control in an LTE system according to an embodiment of the present invention;
4 is a flowchart of a method for traffic overload control in a P-GW 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 drawings, like reference numerals are used to denote like elements in the drawings, even if they are shown in different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a block diagram of an LTE system according to an embodiment of the present invention. Referring to FIG. 1, a UE 10, an eNode B 20, an MME (Mobile Management Entity) A Packet Data Network Gateway (PGW) 50, a Home Subscriber Server (HSS) 60, a Policy & Charging Rule Function (PCRF) 70, and a PDN (Packet Data Network) 80.

The UE 10 is a subscriber terminal device and receives a data call relay from the eNB 20 of the LTE network to the MME 30 as an exchange means. The mobile terminal (UE) 10 may include mobile terminal devices such as a smart phone, a notepad, and a tablet computer. However, these mobile terminal devices are merely examples of a mobile terminal (UE) 10, and various types of terminal devices capable of receiving data service through the wireless Internet may be included in the mobile terminal (UE) 10.

The eNB 20 is a base station equipment of an EUTRAN (Evolved Universal Terrestrial Radio Access Network) access method, and performs functions such as RF transmission and transmission of a transmission signal, signal strength and quality measurement, baseband signal processing, and channel card resource management .

The MME 30 is an EUTRAN access-type mobile communication switching center for signaling control between the eNB 20 and the SGW 40. The MME 30 determines where to route the incoming data from the UE 10, Subscriber information, and mobility management, session management, idle subscriber management, paging, and subscriber authentication functions of the UE 10.

The SGW 40 is a serving gateway device for managing the mobility of the UE 10 between the eNB 20 and the second eNB, and performs a session control function for processing payload traffic according to a set session. In addition, the SGW 40 interworks with the eNB 20, supports handover, sets up the PGW 50 and an EPS bearer (Evolved Packet System bearer), and uses tunneling to transmit a PDU ).

The PGW 50 is a packet data network gateway device that allocates an IP address of the UE 10 and controls a session linked with a PDN (Packet Data Network) 80. The SGW 40 and the PDN 80 ) And routing information, and performs tunneling and IP routing functions. In addition, the PGW 50 is responsible for delivering the PDUs to the SGW 40 and the PDN 80.

The HSS 60 is a network node including a database including subscriber information for a mobile communication system, and may store profile information, authentication and location-related data of a service subscriber.

The PCRF 70 is a charging policy rule processing device and can provide a dynamic QoS and a charging rule according to a service data flow to perform a communication policy and a charging process in the communication network .

The PDN 80 may include, for example, the Internet as a packet data network.

FIG. 2 is a detailed configuration diagram of a device for traffic overload control in the LTE system according to an embodiment of the present invention, which is included in the PGW 50 of FIG. 1. As shown in FIG. 2, Unit 51 and a control execution unit 53. [

The control table generating unit 51 is for generating a traffic control table in which each control item for traffic control is registered or set. For example, a control item registered or set in the traffic control table according to the present embodiment is a control (APN) information (IP address) to be controlled, access point name (APN) information to be controlled, congestion level information for each eNB as a control object, and APN AMBR Bit Rate) information, and the like.

When the identification information of the eNB is received from the Private Extension field of the Modify Bearer Request (MBR) message from the SGW 30, the control performing unit 53 transmits the identification information of the received eNB and the control table generating unit 51), or to generate traffic control information (APN AMBR, for example) by itself, and to perform traffic control according to the generated traffic control information . Traffic control means that data is allowed to be used only up to an APN AMBR value (for example, a value set to be less than an initial value of APN AMBR) generated in response to the traffic, and therefore the detailed description is omitted.

In the first example, when the identification information of the currently received eNB to the same UE is registered in the traffic control table as a control target and is the same as the identification information of the previously received eNB, The traffic control can be performed according to the control information.

In a second example, when the identification information of the currently received eNB to the same UE (UE) is registered in the traffic control table as the control target and is not the same as the identification information of the previously received eNB, Communication control unit 70 receives traffic control information from PCRF 70 by communicating with PCRF 70 on the basis of congestion level information set in the traffic control table in accordance with the identification information of the eNB that has been received, Traffic control can be performed. The congestion level information is transmitted from the PGW 50 to the PCRF 70 through the VS AVP field of the CCR-U message, and the traffic control information is transmitted to the CCA-U (Credit Control Answer May be received at the PGW 50 from the PCRF via the QoS_Information field of the UPDATE message.

In the third example, when the traffic control information is not received from the PCRF 70 for a predetermined time in the second example, the control performing unit 53 sets traffic control information corresponding to the congestion level information in the traffic control table And perform traffic control according to the acquired traffic control information.

In the fourth example, the control execution unit 53 can release the traffic control of the eNB when the eNB is currently in traffic control, because the identification information of the currently received eNB is not registered as a control target in the traffic control table. (For example, the initial value of the APN AMBR) for releasing the traffic control from the PCRF, releases the traffic control according to the received traffic control information, or releases the traffic control from the PCRF (I.e., an initial value of the APN AMBR) set in the traffic control table and can release the traffic control according to the obtained traffic control information. At this time, the traffic control information for releasing the traffic control can be received from the PCRF through the QoS_Information field of the Credit Control Answer-Update (CCA-U) message. The term "traffic control deactivation" means that all data are allowed to be used up to the initially set APN AMBR value (APN AMBR = initial value, for example, APN AMBR = 100 Mbps).

In this embodiment, the control performing unit 53 can perform traffic control for each APN received from the UE 10. For example, if the corresponding APN is an Internet service, traffic control is performed. If the APN is an IMS service, Can not be performed.

In this embodiment, the traffic control information may include an Access Point Name (APN) aggregated maximum bit rate (AMBR) value set for each congestion level.

3 is a flowchart illustrating a method for controlling traffic overload in an LTE system according to an embodiment of the present invention.

First, multiple PDN attachments are formed between the eNB 20-1, the MME 30, the SGW 40 and the PGW 50 (S301), and the PGW 50 is provided with an initial traffic control signal The initial APN AMBR (initial value of APN AMBR) is set to 100 Mbps (S302), and the control table generating unit 51 of the PGW 50 stores the eNB IP, APN, APN-AMBR, It is premised that the traffic control table is set (S303).

When the UE 10 sends a service request message to the MME 30 through the eNB 20-1 at step S304 and the Initial context setup between the eNB 20-1 and the MME 30 ) Process is performed (S305).

The MME 30 then transmits a Modify Bearer Request (MBR) message including EBI = 5 and ULI (User Location Identifier) information to the SGW 40 (S306) In step S306, the eNB IP as the IP information of the eNB 20-1 is included in the Private Extension field of the MBR message received in step S306, and the corresponding MBR message is transmitted to the PGW 50 in step S307.

The MME 30 transmits a Modify Bearer Request (MBR) message including EBI = 6 and ULI information to the SGW 40 (S308), and the SGW 40 transmits the MBR The eNB IP as the IP information of the eNB 20-1 is included in the Private Extension field of the message, and the corresponding MBR message is transmitted to the PGW 50 (S309).

EBI (EPS Bearer Identifier) = 5 indicates the default bearer for the IMS APN connection, and EBI (EPS Bearer Identifier) = 6 indicates the default bearer for the Internet APN connection.

Then, the PGW 50 determines that the eNB IP included in the MBR message received in step S307 is registered in the traffic control table of step S303, but the APN (IMS) information corresponding to the EBI = 5 (IMS) In the case of information not registered in the control table, traffic control is not performed for the IMS service, and a Modify Bearer Response (MBR) message including EBI = 5 information in response to the MBR message received in step S307 ) Message to the MME 30 via the SGW 40 (S310, S311).

If the APN (Internet) information corresponding to the eNB IP and EBI = 6 (Internet) information included in the MBR message received in step S309 is the information registered in the traffic control table of step S303, the PGW 50 transmits the Session (CCR-U) message containing information such as ID, Internet, Event-Trigger (QoS_CHANGE), QoS_Information (APN AMBR = 100M), and VS AVP (Congestion Level) to the PCRF 70 (S312), and sends a Modify Bearer Response (MBR) message including information of EBI = 6 to the MME 30 via the SGW 40 in response to the MBR message received in step S309 (S313, S314).

In step S312, the PCRF 70 receives a CCR-U message including information such as Session-ID = Internet, Event-Report (QoS_CHANGE), QoS_Information (APN AMBR = Low) An APN AMBR = Low information as traffic control information included in the QoS_Information field indicates that the APN AMBR value is lower than the previous value (Low). For example, the CCR- May be set as shown in Table 1 according to the Congestion Level included in the VS AVP field of the U message (S315).

Congestion Level APN AMBR 0 100Mbps (APN AMBR = initial value) One 50Mbps (APN AMBR = Low value) 2 500 Kbps (APN AMBR = Low value) ... ...

For reference, the PCRF 70 and the PGW 50 may have preset APN AMBR values for each congestion level as shown in Table 1 above.

The PGW 50 performs traffic control for the Internet service through the eNB 20-1 based on the APN AMBR = Low information of the CCA-U message received from the PCRF 70 in step S315. For example, , And if the congestion level of the eNB 20-1 is 2, the APN AMBR value is set to 500 Kbps so that the traffic control can be performed so that the Internet usage limit through the eNB 20-1 is limited to 500 Kbps (S316) .

If the user moves from the service area of the eNB 20-1 to the service area of the eNB 20-2 while the APN-specific traffic control is being performed as in step S316, the eNB 20-1 transmits the eNB 20- 2 in step S321 and the eNB 20-2 sends a Path Switch Request (PSR) message to the MME 30 in step S322.

Then, the MME 30 transmits a Modify Bearer Request (MBR) message including EBI = 5 and ULI (User Location Identifier) information to the SGW 40 (S323) In step S324, the eNB IP as the IP information of the eNB 20-2 is included in the Private Extension field of the MBR message received in step S323, and the corresponding MBR message is transmitted to the PGW 50 in step S324.

The MME 30 also transmits a Modify Bearer Request (MBR) message including EBI = 6 and ULI information to the SGW 40 (S325), and the SGW 40 transmits the MBR ENB IP as the IP information of the eNB 20-2 in the Private Extension field of the message, and transmits the corresponding MBR message to the PGW 50 (S326).

Next, the PGW 50 determines whether the eNB IP included in the MBR message received in step S324 is not registered in the traffic control table of step S303 and the APN (IMS) information corresponding to EBI = 5 (IMS) The traffic control is not performed for the corresponding IMS service and the Modify Bearer Response including the EBI = 5 information in response to the MBR message received in step S324 : MBR) message to the MME 30 via the SGW 40 (S327, S328).

If the eNB IP information included in the MBR message received in step S326 is not the information registered in the traffic control table of step S303, the PGW 50 transmits Session-ID = Internet, Event-Trigger (QoS_CHANGE), QoS_Information (APN AMBR = Low) (i.e., the APN AMBR value under control in step S316), and a VS AVP (Congestion Level = 0) (i.e., a congestion level value for releasing traffic control) (MBR) message including the EBI = 6 information in response to the MBR message received in step S326 to the PCRF 70 in step S326, and transmits the MBR message to the SGW 40 (S330, S331). In step S322, the MME 30 transmits a Path Switch ACK (PSA) message to the eNB 20-2 in response to the PSR message received in step S322 (S332).

In response to the CCR-U message received in step S329, the PCRF 70 transmits the CCA-U (including the Session-ID = Internet, Event-Report (QoS_CHANGE), and QoS_Information (APN AMBR = 100Mbps) The APN AMBR = 100Mbps information as the traffic control information included in the QoS_Information field is a value obtained by returning the APN AMBR value to an initial value. For example, as shown in Table 1, in step S329 Indicates a set APN AMBR = 100 Mbps value corresponding to the Congestion Level = 0 included in the VS AVP field of the CCR-U message (S333).

Finally, the PGW 50 releases the traffic control for the Internet service through the eNB 20-2 based on the APN AMBR = 100Mbps information of the CCA-U message received from the PCRF 70 in step S333 ( S334).

FIG. 4 is a flowchart illustrating a method for traffic overload control in the P-GW 50 in a method for traffic overload control in an LTE system according to an embodiment of the present invention. The operation will be described in parallel with the operation.

First, when the MBR message is received from the SGW 40 (S401) while all the steps S301 to S303 of FIG. 3 are performed and the traffic control table is generated in the table generating unit 51, It is determined whether the function is activated (ON) or not (S403).

If the control function is ON in step S403, the control performing unit 53 receives the eNB IP received from the SGW 30 via the Private Extension field of the Modify Bearer Request (MBR) message, (Step S405), and then performs traffic control as in the case of the first to fourth embodiments described below.

First Embodiment

If the eNB IP currently received for the same UE is registered as a control target in the traffic control table (S405) and is identical to the previously received eNB IP (S407), the control performing unit 53 determines that the previously generated traffic Traffic control is performed according to APN-AMBR information as control information (S405).

Second Embodiment

If the identification information of the currently received eNB to the same UE is registered in the traffic control table as a control target (S405) and is not the same as the identification information of the previously received eNB (S407 ) Transmits the CCR-U message including the congestion level information set in the traffic control table to the PCRF 70 in response to the registered eNB IP (S413), and transmits the CCR-U message including the congestion level information from the PCRF 70 to the PCRF 70 (S415), and performs traffic control according to APN AMBR information as traffic control information included in the received CCA-U message (S417, S421).

Congestion level information is transmitted from the PGW 50 to the PCRF 70 via the VS AVP field of the CCR-U message in step S413. In step S415, the traffic control information is transmitted to the CCA- Is received in the PGW 50 from the PCRF 70 via the QoS_Information field of the U (Credit Control Answer-Update) message.

Third Embodiment

If the CCA-U message is not received for a certain period of time from the PCRF 70 for various reasons (S415), the control performing unit 53 transmits the CCA-U message to the control table generating unit 51 APN AMBR information as traffic control information corresponding to the corresponding congestion level information set in the traffic control table is obtained (S419), and traffic control is performed according to the obtained traffic control information (S421).

Fourth Embodiment

The control execution unit 53 determines that the currently received eNB IP is not registered as a control target in the traffic control table (S405). If the eNB is currently under traffic control for various reasons (S411) To the PCRF 70 (S413), the CCR-U message including the congestion level information set in the Congestion Level = 0 information of Table 1 is transmitted from the PCRF 70 to the CCF -U message (S415), APN AMBR = 100Mbps information (i.e., APN AMBR = 1 as traffic control information corresponding to Congestion Level = 0 information in Table 1) as traffic control information included in the received CCA- 100 Mbps information) (S417, S421).

Fifth Embodiment

If the CCA-U message is not received for a certain period of time from the PCRF 70 for various reasons (S415) during the execution of the fourth embodiment, the control performing unit 53 may cancel the traffic control in the traffic control table APN AMBR = 100Mbps information as traffic control information corresponding to Congestion Level = 0 information in Table 1 (S419), and according to the APN AMBR = 100Mbps information obtained in Step S419 The traffic control is canceled (S421).

In this embodiment, the control performing unit 53 performs traffic control for each APN received from the UE 10. For example, if the corresponding APN is an Internet service, traffic control is performed. If the APN is an IMS service, I never do that.

Meanwhile, the PGW 50 performs or cancels traffic control based on the corresponding APN AMBR as in the first through fifth embodiments carried out in step S421. In addition, in step S313 and step S330 in FIG. 3, And transmits an MBR message to the SGW 40 in response to the message.

On the other hand, if the control function is OFF in step S403, or if the eNB is not currently under traffic control in step S411, the PGW 50 transmits the MBR message received in step S401 as in steps S310 and S327 in FIG. 3 In response, the MBR message is transmitted to the SGW 40 (S423).

As described above, a method for traffic overload control in an LTE system according to various embodiments of the present invention may be implemented as a computer-readable recording medium including program instructions for performing various computer-implemented operations. The computer-readable recording medium may include a program command, a local data file, a local data structure, or the like, alone or in combination. The recording medium may be those specially designed and constructed for the embodiments of the present invention or may be those known to those skilled in the computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floppy disks, and ROMs, And hardware devices specifically configured to store and execute the same program instructions. The recording 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 local data structure, or the like. Examples of program instructions may include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: UE (User Equipment)
20: eNB (eNode B)
30: Mobile Management Entity (MME)
40: S-GW (Serving Gateway)
50: P-GW (PDN Gateway)
51: Control table generation unit
53:
60: Home Subscriber Server (HSS)
70: Policy and Charging Rule Function (PCRF)
80: Packet Data Network (PDN)

Claims (26)

A control table generation unit for generating a traffic control table including identification information for the eNB to be controlled, APN information, congestion level information, and APN AMBR; And
When the identification information of the eNB is received from the SGW through a Modify Bearer Request (MBR) message, traffic control information is generated based on the received eNB identification information and the generated traffic control table, And a control performing unit for performing traffic control according to the traffic control information,
The control execution unit communicates with the PCRF based on the congestion level information set in the traffic control table to receive traffic control information from the PCRF and performs traffic control according to the received traffic control information, When the information is not received for a predetermined time, acquires traffic control information corresponding to the congestion level information in the traffic control table, and performs traffic control according to the obtained traffic control information An apparatus for controlling traffic overload in an LTE system. The method according to claim 1,
Wherein the identification information of the received eNB is transmitted from the SGW through a Private Extension field of an MBR message. The method according to claim 1,
If the identification information of the currently received eNB to the same UE is registered as a control target in the traffic control table and is the same as the identification information of the previously received eNB, the control performing unit performs the traffic control Wherein the controller is configured to perform a traffic overload control in an LTE system. The method according to claim 1,
If the identification information of the currently received eNB to the same UE is registered as a control target in the traffic control table and is not the same as the identification information of the previously received eNB, And the traffic control information is received from the PCRF in response to the congestion level (Congestion Level) information set in the traffic control table, and the traffic control is performed according to the received traffic control information. A device for controlling traffic overload in a network. 5. The method of claim 4,
The Congestion Level information is delivered to the PCRF through the VS AVP field of the Credit Control Request-Update (CCR-U) message, and the traffic control information includes the QoS_Information field of the Credit Control Answer- And the received signal is received from the PCRF via the second path. delete The method according to claim 1,
If the eNB identification information of the currently received eNB is not registered as a control target in the traffic control table and the eNB is currently under traffic control, the control performing unit receives the traffic control information from the PCRF by communicating with the PCRF, And releases the traffic control according to the control information. 8. The method of claim 7,
Wherein the traffic control information is received from a PCRF through a QoS_Information field of a Credit Control Answer-Update (CCA-U) message. 8. The method of claim 7,
And if the traffic control information is not received from the PCRF for a predetermined time, acquires traffic control information set in the traffic control table and releases traffic control according to the obtained traffic control information. Apparatus for control. The method according to claim 1,
Wherein the control performing unit performs traffic control for each APN received from the terminal. 11. The method of claim 10,
Wherein the control unit performs traffic control when the APN is an Internet service and does not perform traffic control when the APN is an IMS service. 12. The method according to any one of claims 1 to 5 and 7 to 11,
Wherein the traffic control information includes an access point name (APN) aggregated maximum bit rate (AMBR) information. 12. The method according to any one of claims 1 to 5 and 7 to 11,
Wherein the apparatus for traffic overload control in the LTE system is included in the PGW. As a method performed in the PGW,
(a) generating a traffic control table including identification information, APN information, congestion level information, and APN AMBR for an eNB to be controlled; And
(b) when the identification information of the eNB is received from the SGW through a Modify Bearer Request (MBR) message, generates traffic control information based on the identification information of the received eNB and the generated traffic control table, And performing traffic control according to the generated traffic control information,
In step (b), the traffic control information is received from the PCRF by communicating with the PCRF based on the congestion level information set in the traffic control table, and traffic control is performed according to the received traffic control information. The traffic control information corresponding to the congestion level information is obtained from the traffic control table and the traffic control is performed according to the obtained traffic control information when the traffic control information is not received for a predetermined period of time A method for traffic overload control in an LTE system. 15. The method of claim 14,
Wherein the identification information of the received eNB in the step (b) is transmitted from the SGW through a Private Extension field of an MBR message. 15. The method of claim 14,
(c) if the identification information of the currently received eNB to the same UE is registered as a control target in the traffic control table and is the same as the identification information of the previously received eNB, the step (b) And performing traffic control according to the information. ≪ RTI ID = 0.0 > 11. < / RTI > 15. The method of claim 14,
(b) if the identification information of the currently received eNB to the same UE is registered in the traffic control table and is not the same as the identification information of the previously received eNB, communicating with the PCRF based on the congestion level information set in the traffic control table in response to the identification information of the eNB, receiving traffic control information from the PCRF, and performing traffic control according to the received traffic control information Wherein the method comprises the steps of: 18. The method of claim 17,
In step (d), the congestion level information is transmitted to a PCRF through a VS AVP field of a CCR-U message, and the traffic control information is transmitted to a credit control answer- Update message from the PCRF through the QoS_Information field in the LTE system. delete 15. The method of claim 14,
(b) if the identification information of the currently received eNB is not registered as a control target in the traffic control table and the eNB is currently under traffic control, the step (b) communicates with the PCRF to receive traffic control information from the PCRF And releasing traffic control according to the received traffic control information. ≪ Desc / Clms Page number 20 > 21. The method of claim 20,
Wherein the traffic control information is received from a PCRF through a QoS_Information field of a Credit Control Answer-Update (CCA-U) message in step (f). 21. The method of claim 20,
(g) if the traffic control information is not received from the PCRF for a predetermined time in the step (f), the step (b) acquires the traffic control information set in the traffic control table, And releases the traffic control. ≪ Desc / Clms Page number 20 > 15. The method of claim 14,
Wherein the step (b) comprises traffic control for each APN received from the terminal. 24. The method of claim 23,
Wherein the traffic control is performed when the APN is an Internet service and the traffic control is not performed when the APN is an IMS service in step (b). 15. The method of claim 14,
Wherein the traffic control information includes an access point name (APN) aggregated maximum bit rate (AMBR) information. A computer-readable recording medium having recorded thereon a program for causing a computer to execute a method for traffic overload control in the LTE system according to any one of claims 14 to 18 and 20 to 25.

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