KR20100003790A - Accounting process method and system for preventing charge loss in pdp preservation state - Google Patents

Abstract

PURPOSE: A billing processing method and a system thereof for preventing the overlap of charge data and reducing the charging loss in a PDP preserved condition are provided to reduce resource waste about a charge session management by performing account process based on a session in a state without completion of a call. CONSTITUTION: A packet switching unit transmits a message in which the conservation information is included. A packet gateway switching unit transmits a message requesting the stop of charge according to a message included in conservation information according to the message in which the conservation information is included. A charging server(350) stores a charging record about a charging session. The packet switching unit inserts non-preservation information into the message for a channel reset.

Description

Accounting Process Method and System for Preventing Charge Loss in PDP Preservation State

The present invention relates to a billing processing method and system, and upon entering a Packet Data Protocol (PDP) preservation state, delivers preservation information to a billing server through a gateway GPRS service node (GGSN), thereby providing a corresponding session. When the channel is reset and the channel is reset, non-preservation allows billing data to be distinguished without duplication by the time stamp inserted in the billing session delimiter. The present invention relates to a billing processing method and system that reduces resource waste and prevents billing loss for billing session management by allowing session-based billing processing to be performed.

Asynchronous network (3GPP) utilizes PDP preservation (preservation) to efficiently use the resources of the radio section. That is, for a terminal without traffic flow in a radio access network (RAN), the terminal is maintained in a state in which a PDP type is maintained between the terminal, a Serving GPRS Service Node (SGSN), and a GGSN to receive Always On service. Releases a radio channel between the base station and the Node-B. At this time, the RAN notifies the SGSN that the terminal has entered the preservation, but the preservation entry information of the terminal is transmitted only to the SGSN and not to the GGSN.

In the case of using the PDP preservation, it is possible to use the resources efficiently by temporarily maintaining the resources in the wireless section.However, for the wireless network operator, the method for collecting the billing data is not clearly described. It is not easy and there is a problem that the loss of charge occurs.

For example, as shown in FIG. 1, when a channel is set up in a mobile station (MS) and a service is started, the accounting server is notified to the accounting server through the RAN, SGSN, and GGSN. Similarly, the charging record record (CDR) for the data volume (Vume) serviced to the corresponding charging session identifier (Acct-Session ID) (K) is managed. If the terminal is in the primary preservation state for ΔT time after receiving the service for T time, there is no notification to the charging server, and after the channel is set up again and the service resumes, the charging server notified of this is As shown in Fig. 2, the CDRs are continuously managed in the data amount V2 of the same billing session separator K. This preservation state and resumption of channel establishment are repeated until the call is completely terminated, and the charging server can manage the CDR in the above manner.

However, in the above billing processing method, since the wireless network service provider does not terminate the call, it does not matter when the billing data is generated, that is, when the billing server is billed by notifying the billing server of the CDR contained in the billing server. It is ordered. In addition, when the billing session is terminated due to the entry of the storage, when the user transitions to non-preservation and wants to perform billing according to the new channel setting, the billing server stores the data of the billing session identifier that is identically duplicated even before storing and managing the old CDR. There is a problem that you can lose the charge according to the conflict. In addition, a charging session is opened at the time of call establishment and the session is organized at the end of the call in the PCRF (Policy and Charging Rules Function) or the OCS (Online Charging System) for prepaid billing. The billing process is notified. In this case, the session management for the preservation state is maintained for an excessively long time, resulting in waste of resources and inefficient charging processing.

Accordingly, an object of the present invention is to solve the above-described problems, and an object of the present invention is to manage a billing session identifier so that the billing session before and after PDP preservation in the GGSN is managed, and the preservation information is transmitted from the SGSN to the GGSN. It is possible to provide a billing processing method and system that can enable session-based billing processing in a state where a call is not terminated.

Another object of the present invention is to transfer preservation information to the charging server through the GGSN upon entering the PDP preservation state, to clean up the corresponding charging session, and to charge the data when the channel is reset. By repeating the process of inserting a time stamp in the billing session separator so as not to be duplicated, the present invention provides a billing processing method and system that can reduce resource waste and prevent billing loss for billing session management.

First, to summarize the features of the present invention, the billing processing method according to an aspect of the present invention for achieving the above object of the present invention comprises the steps of: transmitting a message containing the preservation information when entering the preservation state; And storing and managing a charging record for the charging session by transmitting a message requesting to stop the charging to the charging server.

After the storing and managing, inserting non-conservation information into a message for resetting a channel for a service request in a preserving state; And transmitting to the charging server including a charging session identifier which is distinguished from a previous charging session in a message requesting to start charging.

According to another aspect of the present invention, there is provided a wireless network operating system for billing processing in a packet network, including: SGSN for transmitting a message including preservation information when entering a preservation state; And a GGSN transmitting a message for requesting stop of charging according to the message including the preservation information. And a charging server configured to receive the message for requesting stopping the charging and store and manage the charging record for the corresponding charging session.

The SGSN inserts non-conservation information into a message for resetting a channel for a service request in a preservation state, and the GGSN includes a charging session identifier which is distinguished from a previous charging session in a message requesting to start charging. Can be sent to the billing server.

According to the charging method method and system according to the present invention, the preservation information can be transferred from SGSN to GGSN, and the billing session before and after PDP preservation is cleared through the charging session identifier in GGSN, so that the session is not terminated. Based charging can be done.

In addition, according to the charging method and method according to the present invention, when entering the PDP preservation state can transfer the preservation information to the billing server through the GGSN to organize the billing session, the billing at non-preservation when the channel is reset By repeating the process of inserting a time stamp on the billing session separator so that the data is not duplicated, it is possible to reduce the waste of resources for billing session management and to prevent the billing session key from colliding.

In addition, according to the billing processing method and system according to the present invention, it is possible to simplify billing data collection and billing by treating the end of the session as a call by preservation.

In addition, according to the charging method and method according to the present invention, even if the storage is re-entry in a short time of about 1 to 2 minutes and the radio resource setting and release is repeated, by immediately processing without accumulating a lot of charging data, From the user's point of view, the company pays only the amount of service data during the time of using the wireless channel, and the network operator can generate the billing data at an accurate time while efficiently operating the wireless network.

In addition, when PCRF or OCS is introduced into an asynchronous network such as 3GPP, billing session information is maintained until the call is terminated for real time subtraction. If there is no information on preservation, time and traffic volume bytes are temporarily Network license resource (Quota), but the final billing data could not be generated, but according to the billing method and system according to the present invention to receive the information about the retention from the GGSN requires real-time deduction For prepaid service terminals, preservation allows for the generation of billing data, which is considered as an independent call upon entry. If a CDF is introduced, billing data can be generated for postpaid subscribers as a single, independent call at the time of preservation entry.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings and the contents described in the accompanying drawings, but the present invention is not limited or limited to the embodiments. Like reference numerals in the drawings denote like elements.

3 is a view for explaining a WCDMA wireless network management system 300 according to an embodiment of the present invention.

Referring to FIG. 3, a WCDMA wireless network operating system 100 according to an embodiment of the present invention may include a mobile station (MS) 310, a RAN (Radio Access Network) 320, and a circuit core. Network (circuit core network) 330, packet core network (packet core network) (340) and billing server 350. In addition, the WCDMA wireless network operating system 300 may further include various application servers connected to the circuit core network 330 or the packet core network 340 and associated with network management.

The circuit core network 330 operates a home location register to allow calls to be connected between the terminals regardless of which region the mobile terminals are located in, and includes a mobile switching center (MSC) and a gateway mobile switching center (GMSC). It is connected to the circuit public network, including, and to allow circuit traffic to be transmitted and received between the circuit public network. The packet core network 340 is connected to the Internet network including a Serving GPRS Service Node (SGSN), a Gateway GPRS Service Node (GGSN), and the like, and allows IP packets to be transmitted and received to and from the Internet network.

The RAN 320 is composed of a base station Node-B and a Radio Network Controller (RNC). The base station Node-B connected to the RNC may be configured in plural, and the mobile terminal 310 receives a relay from the base station Node-B to provide communication services such as call, digital broadcasting, digital media streaming, download and upload. I can receive it. The RNC connected between the base station Node-B and the core network (circuit core network / packet core network) controls the traffic generated in the communication to be transmitted and received to the destination through the base station Node-B. The RNC performs a RRM (Radio Resource Management) function and a handover function to support mobility between cells according to scheduling of radio resources to control communication between mobile terminals 310 to control circuit traffic ( Circuit traffic (IP) or IP (packet traffic) packet traffic can be properly transmitted and received to the destination mobile terminal, wired telephone, application server, etc. of the corresponding location.

Meanwhile, the mobile terminal 310 comprehensively refers to all kinds of wireless communication devices that are camped on the WCDMA network and use the WCDMA access technology. The mobile terminal 310 periodically performs communication with the RAN 320 in the idle state to perform a location registration process on the HLR connected to the core network, so that the resource distribution and handover functions of the RNC are supported at any location. You can receive services such as calling, streaming data, downloading or uploading.

In particular, the SGSN of the packet core network 340 according to the present invention is a packet exchange means, and can transmit a message including the preservation information to the GGSN upon entering the PDP preservation (hereinafter, abbreviated as preservation) state. GGSN, a packet gateway exchange means, may transmit a message requesting to stop the charging according to the message including the preservation information to the charging server 350, so that the charging server 350 receives the message requesting to stop the charging. The billing record for the billing session can be stored and managed even before the call ends. For example, the billing server 350 transmits a corresponding billing record (CDR) to a predetermined billing server so that the billing server 350 can be used as basic information for billing for each subscriber.

In the case of receiving a channel reset request from the mobile terminal in this preservation state, the SGSN may insert non-preservation information into a message for channel reset for the service request and transmit the non-preservation information to the GGSN, whereby the GGSN requests to start charging. The message may be transmitted to the billing server 350 by including a billing session delimiter such as a time stamp. Sessions before and after the retention state can be divided according to the billing session delimiter, and session-based charging processing considered as an independent call can be performed for the billing session before the retention state even before the call is terminated.

As described above, in the present invention, preservation information can be transferred from SGSN to GGSN, and the pre- and post-preservation billing session is cleared through the billing session identifier in the GGSN, so that the session is terminated by preservation while the call is not terminated. By treating the point of time as a call to enable session-based billing, billing data collection and billing can be simplified. In addition, in the present invention, the preservation information can be delivered to the charging server 350 through the GGSN at the time of entering the preservation state so that the billing session can be arranged, and the billing data is distinguished without being duplicated when the channel is reset. By repeating the process of inserting the time stamp in the billing session separator, it is possible to reduce the waste of resources for billing session management and to prevent the billing session key from colliding, thereby preventing the billing loss. In the present invention, even when the storage is re-entered in a short time of about 1 to 2 minutes and the radio resource setting and release are repeated, the processing is performed immediately without accumulating a large amount of billing data. The service provider pays only for the amount of service data, and the network operator can generate the billing data at an accurate time while efficiently operating the wireless network.

Hereinafter, with reference to the flowchart of Figure 4 illustrating a charging method according to an embodiment of the present invention in the storage entry state will be described in more detail.

First, when a mobile terminal enters a shadow area or there is no traffic flow due to a failure of a network system such as a base station, etc., the mobile terminal enters a PDP preservation state, according to the traffic volume management procedure (traffic volume management procedure) of the WCDMA. ) May request to release the RAB (Radio Access Bearer) by transmitting a RAB (Radio Access Bearer) Release Request message to the SGSN (a). At this time, RAB ID, Cause = UserInactivity (User Inactivity), UE Lost (User Terminal Loss), Break of Air connection (session disconnected by the mobile terminal), etc., can be stored and delivered in the message. have. Accordingly, the SGSN may perform a corresponding release procedure for the requested RAB through a RAB Assignment Request (including information on a RAB ID, Cause, etc.) message (b).

Accordingly, the RAN 320 may release the RAB for the corresponding mobile terminal if the corresponding RAB exists (c), and the RAN 320 sends a RAB Assignment Response (including information on the RAB ID) message to the SGSN. As a result, the SGSN stores information about its GTP SND (GPRS Tunnelling Protocol Sequence Number for Packet Downlink) and GTP SNU (GPRS Tunnelling Protocol Sequence Number for Packet Uplink) and manages its PDP Context. It may be used when resetting the RAB for the terminal (d).

On the other hand, SGSN does not transfer the "Delete PDP Context Request" message to the GGSN because the call is not terminated, in this case, the present invention transmits the "Update PDP Context Request" message from the existing message to the GGSN to release the RAB, the service session This is terminated, it can be transmitted to the GGSN that the mobile terminal has entered the conservation state (e). Here, the "Update PDP Context Request" message may include field information such as a Tunnel Endpoint Identifier (TEID), a Network Service Access Point Identifier (NSAPI), Private, and the like, and preservation information may be set in the Private field. The Private field may include preservation information for identifying a preservation entry cause according to Cause = UserInactivity, UE Lost, Break of Air connection, and the like described in a.

The GGSN receives the "Update PDP Context Request" message and if the retention information is set, the GGSN sends a message requesting to stop charging, for example, an "Accounting Request (Stop)" message to the charging server 350, for example, RADIUS Accounting. You can request to clear the billing of the session by sending it to the server (f). Since the GGSN has not received the "Delete PDP Context", the GGSN can store and manage the corresponding PDP context necessary for maintaining the preservation state for the mobile terminal. In terms of service, the GGSN forwards the "Accounting Request (Stop)" message to the billing server 350 so that the billing data is treated similarly to a single call.

In this case, it is possible to use the "Accounting Request (Stop)" message in the case of RADIUS according to the protocol used for the charging server 350, but is not limited thereto. For example, in the case of DIAMETER, the postpaid charging terminal may be used. The "Accounting Request [Stop]" message may be used for the prepaid terminal, and the "Credit Control Request [Termination]" message may be used for the prepaid terminal. As the billing server 350, for example, when interworking with the 3GPP Charging Gateway Function (CGF), the billing data may be generated in the GGSN and then transferred to the CGF using the GTPP protocol.

On the other hand, when the GGSN receives the "Update PDP Context Request" message and processes it successfully, the GGSN may respond to SGSN that the request was successfully processed by including information such as Cause = 'Request Accepted' in the "Update PDP Context Response" message. (G). The charging server 350 may respond to the GGSN that the charging request by the GGSN was successfully performed (h). Steps g to h may not be performed sequentially, and the GGSN may perform a corresponding PDP context change procedure with the SGSN regardless of the interworking procedure with the charging server 350.

When the charging server 350 receives the "Accounting Request (Stop)" message that requests to stop charging in step f, the charging server 350 may store and manage a charging record (CDR) for the corresponding charging session. In the present invention, as described below, the session before and after the retention state is classified according to the charging session identifier generated and transmitted in step k, so that the call is independent of the charging session before the retention state before the call ends. It is possible to perform the session-based charging processing considered. Accordingly, the billing server 350 transmits the corresponding billing record (CDR) to a predetermined billing server so that the billing server 350 can be used as basic information for billing for each subscriber.

After the processing for entering the preservation state, the terminal may enter the non-preservation state from the preservation state and request a channel reset to the network (i). In this case, the SGSN sets non-conservation information to a message for resetting a channel for a service request, for example, an "Update PDP Context Request" message, to the GGSN and transmits it (j). Non-conservation information may be included in a private field, as described in step e.

At this time, the GGSN needs to manage new charging session information as the Radio Session is reset. To this end, the GGSN may generate a session key distinguished from the "Accounting-Session-Id" (billing session identifier) that was managed in the preservation state. In general, 3GPP Acct-Session-ID (billing session identifier) generation method, GGSN IP Address + GGSN Charging ID, GGSN IP Address is delivered to the billing server 350 through the "Accounting Request (Start)" message Therefore, due to the overlapping charging session delimiter as shown in FIG. 2, there was a problem that a data collision occurs before the previous CDR is stored and managed, thereby losing the charging. In order to solve this problem, in the present invention, a time stamp may be used instead of the GGSIN IP address, and in some cases, a sequence number may be used instead of the GGSN IP address. For example, by using the GGSN Charging ID as the Acct-Session-ID as a time stamp for the time of acquiring the request for resetting the radio session (for example, the time when non-conservation information is received), and FIG. As shown in FIG. 5, the billing sessions before and after preservation can be classified and managed by unique keys. You can also use "time stamp + GGGSN Charging ID" as the billing session identifier for non-preservation call setup.

Accordingly, the GGSN receiving the "Update PDP Context Request" message transmits a message for requesting to start charging, for example, "Accounting Request (Start)" to the charging server 350 as described above if non-conservation information is set. To start charging the session. The "Accounting Request (Start)" message includes a charging session identifier that is distinguished from the previous charging session, for example, "time stamp + GGSN Charging ID," as shown in FIG.

In this case, when the GGSN receives the "Update PDP Context Request" message and processes it successfully, the GGSN responds to the SGSN that the request was successfully processed by including information such as Cause = 'Request Accepted' in the "Update PDP Context Response" message. (L). The charging server 350 may respond to the GGSN that the charging request by the GGSN was successfully performed (m). Steps 1 through m may not be performed sequentially, and the GGSN may perform a corresponding PDP context change procedure with SGSN regardless of the interworking procedure with the charging server 350. Accordingly, the mobile station requesting the channel reset may set up the network and the RAB to resume service on the corresponding channel (n).

In the present invention, the session before and after the preservation state is classified according to the billing session delimiter as described above, so that the session-based charging process regarded as an independent call can be performed for the billing session before the preservation state before the call ends. . In addition, even when PCRF or OCS is introduced into an asynchronous network such as 3GPP, billing session information is maintained until the call is terminated for real-time subtraction. If there is no information on preservation, time and traffic volume bytes are provisionally stored. network license resource (Quota) such as bytes) was deducted, but the final billing data could not be generated, but real time deduction is required when receiving information on preservation from GGSN according to the method and system of billing processing according to the present invention. Even prepaid service terminals can be regarded as an independent call when entering into a preservation type, and can generate billing data.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

1 is a diagram illustrating a general charging processing method of a PDP preservation state in 3GPP.

FIG. 2 is a diagram for explaining a general charging session identifier of a PDP preservation state in 3GPP.

3 is a view for explaining a WCDMA wireless network operating system according to an embodiment of the present invention.

4 is a flowchart illustrating a charging processing method according to an embodiment of the present invention in a PDP storage entry state.

5 is a diagram illustrating a charging session delimiter according to an embodiment of the present invention.

Claims (8)

Transmitting a message including retention information when entering a retention state; And Storing and managing the billing record for the billing session by sending a message requesting the billing stop to the billing server. Charging processing method comprising a. The method of claim 1, wherein the transmitting step, And transmitting the message from the packet exchange means to the packet gateway exchange means. The method of claim 1, wherein the managing of the storage comprises: And transmitting the billing record to the billing server and using the billing server as basic information for billing for each subscriber. According to claim 1, After the storage management step, Inserting non-conservation information into a message for resetting a channel for a service request in the preserved state and transmitting the non-conserved information; And Transmitting to the charging server including a charging session delimiter distinguished from a previous charging session in a message requesting to start charging; The billing processing method further comprising. 5. The method according to claim 4, wherein the billing session identifier includes a time stamp for a predetermined sequence number or a time at which the non-conservation information is received. The method of claim 4, wherein the managing of the storage comprises: And classifying sessions before and after a preservation state according to the accounting session delimiter, and performing a session-based billing process regarded as an independent call to a billing session before the preservation state before the call ends. In the wireless network operating system for billing processing in the packet network, Packet switching means for transmitting a message including retention information upon entering a retention state; And Packet gateway exchange means for transmitting a message for requesting stop of charging according to the message including the preservation information; And A billing server that receives a message requesting to stop the billing and stores a billing record for the billing session. Wireless network operating system comprising a. The method of claim 7, wherein The packet switching means inserts and transmits non-conservation information into a message for resetting a channel for a service request in a preservation state, The packet gateway exchange means transmits to the accounting server a billing session identifier which is distinguished from a previous billing session in a message requesting to start billing.

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