KR100591699B1 - Method for Releasing Packet Service Using Packet Control Function in Mobile Packet Data Network - Google Patents

Abstract

The present invention provides a method in which a packet control function (PCF) receives a call release request message from a server that performs authentication, authorization, and billing (AAA), and a base station controller (BSC). Transmitting a call release request message to a station controller; transmitting a call release request message to a packet data serving node (PDSN); and performing the function of authentication, authorization, and charging (AAA). The present invention relates to a packet service release method comprising transmitting a response message to a call release request to a server, and has an effect of releasing a call through a packet controller.

Packet Control Unit (PCF), Packet Data Service Node (PDSN), AAA Server, Call Release

Description

Method for Releasing Packet Service Using Packet Control Function in Mobile Packet Data Network in packet communication network

1 is a block diagram showing a configuration of a packet data network according to the prior art.

Figure 2 is an embodiment signal processing diagram showing a packet data service and billing method to which the present invention is applied.

3 is an embodiment signal processing diagram illustrating a packet service release method according to the present invention;

The present invention relates to a method for releasing a packet service, and more particularly, to a method for releasing a call through a packet control unit for a subscriber who has no balance during packet service to a prepaid subscriber using the packet control unit.

In general, a mobile communication packet data network uses a Radius (Remote Authentication Dial In User Service: RADIUS) server to perform subscriber authentication, authorization, and accounting functions.

1 is a diagram illustrating an exemplary embodiment of a mobile communication network element and its configuration for a packet data service of the prior art and the present invention.

Referring to FIG. 1, a mobile communication network element for a packet data service and a configuration thereof are wirelessly connected to a mobile station (MS) for a user and a base transceiver station (BTS). The base station apparatus is connected to a base station controller (BSC) / packet control function (PCF), and the base station controller / packet controllers are a mobile communication exchange (MSC) / visitor subscriber location register (VLR). Register, and the MSC / VLR is connected to a home location register (HLR) to connect to another communication network, such as a public switched telephone network (PSTN), a PCS, and a public terrestrial mobile communication (PSTN). Communication with a PLMN (public land mobile network) is made.

On the other hand, the base station controller / packet controller is connected to the intranet, and furthermore the Internet network through a Packet Data Serving Node (PDSN). In addition, a local RADIUS server directly connected to the packet data service node and a home RADIUS server that manages authentication, authorization information, and billing data of mobile subscribers through the Internet network, and visits To provide a mobile IP service with a broker RADIUS server that acts as a relay with an authentication relationship between a visitor location register (VLR) and a home location register (HLR). It is provided with a home agent (HA). In this section, all Radius servers are referred to as simplified.

In order to charge for the packet data call service used by the prepaid subscriber, each device in the mobile communication system should provide the packet data call service within the prepaid billing limit and reduce the amount of the provided packet data use from the prepaid billing. If the total limit is exceeded, the packet data call is blocked.

The packet data prepaid charging method includes a packet data service node for establishing a point-to-point protocol (PPP) connection with a terminal, an authentication, authorization, and accounting (AAA) for managing information of a prepaid subscriber; Interworking between SCP (Service Control Point), a service controller that processes packet data charging information for each prepaid subscriber and delivers it to MSC (Mobile Service), and a packet data service node that releases packet data calls when the balance is exhausted. Is done through.

According to the related art, the algorithm for processing the prepaid subscriber billing in the mobile communication packet data network first determines whether the subscriber is the prepaid subscriber, when the AAA receiving the access request message from the packet data service node. If it is determined that the subscriber is a prepaid subscriber, the algorithm transmits an access accept message including the balance information of the subscriber in the subscriber table to the packet data service node, and the access accept received from the AAA by the packet data service node. ) Consists of an algorithm that manages the balance information of the prepaid subscriber included in the message while the subscriber's call is established.

The balance information of the prepaid subscriber is stored in the subscriber database of the AAA, and after the call to the subscriber is established, the balance data of the subscriber is managed by the packet data service node. That is, the packet data service node managing the subscriber's balance information may release the subscriber's call by recognizing the moment when the balance is exceeded.

The prepaid subscriber billing processing procedure in a mobile communication packet data network according to an embodiment of the prior art is as follows. First, the packet data service node receiving the PPP session establishment request transmits an access request message to the AAA. Upon receiving the message, the AAA authenticates the subscriber and, upon successful authentication, transmits an access request message to the packet data service node. At this time, if the subscriber is a prepaid billing subscriber, the AAA includes the subscriber's balance information stored in the subscriber's database in the access accept message.

The packet data service node receiving the corresponding access accept message continuously manages the data usage up to the present from the balance information of the subscriber. If the subscriber's balance information becomes "0", the packet data service node releases the subscriber's call.

In addition, while the call is set up for the subscriber, the packet data service node periodically sends an accounting request interim message to the AAA according to the accounting interim timer, and the AAA receiving the message receives the subscriber. The balance information of the subscriber stored in the table is updated.

The difference between the existing prepaid billing service and the method proposed by the present invention is that the packet data service node and the AAA manage the subscriber's balance information. Thus, if the subscriber's balance is exceeded before the subscriber's call is released, the packet data service node that has acknowledged this sends an Accounting Request Stop message to the AAA to terminate the call for the subscriber. Upon receiving this message, the AAA updates the balance information for the subscriber and generates billing data. Thereafter, the packet data service node receiving the accounting response message from the AAA terminates the call to the subscriber. However, in the prior art, a method for releasing a packet data service using a packet controller has not been proposed.

The present invention has been proposed to solve the above problems, and the mobile data communication node, the packet controller (PCF) and the AAA to manage the subscriber's packet data call to handle the subscriber's call in accordance with the prepaid billing balance An object of the present invention is to provide a prepaid subscriber billing processing method through a packet controller in a packet data network.

The present invention for achieving the above object relates to a packet service release method, the packet control function (PCF; Packet Coltrol Function (AAA; Authentication, Authorization and Accounting) server that functions as authentication, authorization and billing) Receiving a release request message, transmitting a call release request message to a base station controller (BSC), and transmitting a call release request message to a packet data serving node (PDSN) And sending a response message to the call release request to an AAA server functioning for authentication, authorization, and charging.

The present invention also provides a method for authentication, authorization and accounting (AAA) server receiving a charging request intermediate message from a packet data service node, updating a subscriber database, and Transmitting information to a service control point (SCP), receiving a response message according to the balance check result of the service controller, and if the response message includes insufficient balance information, a packet controller (PCF); Packet Coltrol Function) transmits a call release request message.
In addition, the present invention, the authentication, authorization and accounting (AAA) server that performs the function of charging, receiving a charge request intermediate message from a packet data serving node (PDSN: Packet Data Serving Node) (PDSN), and Updating, by an AAA server, a subscriber database according to the received charging request intermediate message; transmitting, by the AAA server, subscriber information to a service control point (SCP); and receiving, by the service controller, the subscriber Transmitting a response message including balance information on the subscriber identified using the information to the AAA server, and when the balance information included in the response message received by the AAA server from the service controller indicates insufficient balance, And transmitting a call release request message to a packet control function (PCF).

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a signal processing diagram illustrating an embodiment of a packet data service and a billing method to which the present invention is applied. Referring to FIG. 2, when a packet data service node receives a PPP connection establishment request from a subscriber terminal, the packet data service node transmits an access request message to the AAA, and the corresponding access request (Access-Request). The message contains information about the subscriber who requested the call connection.

Receiving the Access-Request message, the AAA searches its subscriber database based on the subscriber's information included in the message and performs authentication to check whether the subscriber is a registered subscriber. Once identified as a registered subscriber, the AAA verifies the subscriber's limit balance information by sending an SCP-Access-Request message containing the mobile terminal identifier (MSID, NAI) to the SCP.

After confirming that the subscriber is a registered subscriber, the AAA establishes a PPP connection by sending an access-accept message to the packet data service node, and sends an access-reject message if the subscriber is not a registered subscriber or the call setup is incorrect. The connection is sent to the packet data service node to prevent the connection to the subscriber.

After the packet data service node receives an access-accept message from the AAA and the PPP connection is established between the subscriber who requested the call and the packet data service node, the packet data service node starts charging request to the AAA. Will send a message.

In this case, the accounting request start message includes information for billing processing of the subscriber. Upon receiving the message, the AAA looks up the stored subscriber's information to recognize that the subscriber has the correct charging information, and sends the SCP-Accounting-Request message to the SCP, including the subscriber's mobile terminal identifier and the charging information. do. Thereafter, after checking the limit balance of the subscriber, SCP transmits a response message including the limit balance information to the AAA, and sends an accounting response message to the packet data service node that receives the response message.

When the call is established, the packet data service node transmits an accounting request interim message of the current subscriber to the AAA according to an accounting interim timer. Upon receiving this message, the AAA updates the subscriber's database balance information and sends it to SCP.

3 is an exemplary signal processing diagram illustrating a packet service releasing method according to the present invention. As shown in FIG. 3, if the balance of the subscriber is exceeded before the prepaid subscriber's call is released, the AAA receiving the next Accounting Request Interim message receives the information through the same process as before. The AAA, upon transmission and recognizing that the balance has been exceeded by the SCP, requests the packet controller (PCF) to release the subscriber's call. The packet controller receives the request, requests the call release to the BSC, requests the call release to the packet data service node, and then sends a response to the call release request to the AAA. The format of the call release request message is shown in Tables 1 and 2.

Information element type Contents Length value Message type (= 10,0AH) necessary Call released request message type One Call station identifier necessary MSID of the caller 15 IMSI Cause necessary Reason for release One 01H: Authentication Failed 02: Quota Deplete R-P Session Identifier necessary 3GPP2 26/41 4 Interference identifier necessary 3GPP2 26/44 8 AAA IP Address necessary AAA IP Address 4

Information element type Contents Length value Message type (= 10,0AH) necessary Call released request message type One Call station identifier necessary MSID of the caller 15 IMSI Cause necessary Release Result Status One 00H: Release successful 01H: Release complete 02H: Handoff complete 03H: Other R-P Session Identifier necessary 3GPP2 26/41 4 Interference identifier necessary 3GPP2 26/44 8 AAA IP Address necessary PCF IP Address 4

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

As described above, the present invention has the effect of releasing a call through the packet controller. On the other hand, there is another effect that allows the call to be released in the dormant state.

Claims (5)

Receiving a call release request message from a server (AAA; Authentication, Authorization and Accounting) that the packet control function (PCF; Packet Coltrol Function); Transmitting a call release request message to a base station controller (BSC); Transmitting a call release request message to a Packet Data Serving Node (PDSN); And Sending a response message to the call release request to the server that functions as the authentication, authorization, and charging (AAA); Packet service release method comprising a. Receiving a charging request intermediate message from a packet data service node by an authentication, authorization and accounting (AAA) server; Updating the subscriber database; Transmitting subscriber information to a service control point (SCP); Receiving a response message according to a balance check result of the service controller; And When the response message includes insufficient balance information, a packet control function (PCF) transmitting a call release request message; Packet service release method comprising a. The method of claim 2, And receiving a call release request response message according to a call release result of the PCF. Receiving, by the AAA server, a function of authentication, authorization, and charging, a charging request intermediate message from a Packet Data Serving Node (PDSN); Updating, by the AAA server, a subscriber database according to the received charge request intermediate message; Transmitting, by the AAA server, subscriber information to a service control point (SCP); Transmitting, by the service controller to the AAA server, a response message including balance information about the subscriber confirmed using the received subscriber information; And If the balance information included in the response message received from the service controller indicates that the balance is insufficient, transmitting the call release request message to a packet control function (PCF). Packet decommissioning method that includes. The method of claim 4, wherein Transmitting, by the packet controller, a call release request message to a base station controller (BSC) and a packet data serving node (PDSN) according to the received call release request message; Packet service decommissioning method further comprising.

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