KR100540327B1 - Voice Call Processing Method For Pre-Paid Service In WCDMA - Google Patents

Abstract

The present invention relates to a voice call processing method of a prepaid mobile telephone service in WCDMA. As a subscriber attempts to make a call to a mobile telephone exchange, the home location register confirms that the calling subscriber is a prepaid mobile telephone service subscriber. If the subscriber is a voice call originating step requesting a call connection to the mobile telephone exchange, and the mobile telephone exchange requests triggering processing to the service control point, the service control point determines that the call originates from the subscriber of the prepaid mobile telephone service, and the called number is uncharged. After confirming that the number is a non-billing number, if it is a non-billing number, the call should be continued or released without being charged, and if it is a non-billing number, the call should be released. The amount of money to which the charge amount is specified by checking the charge amount of the calling subscriber If more than this amount, the charge amount confirmation step of transmitting the call information request message after the call of the calling subscriber to the mobile telephone exchange, the charge processing request message from the service control point to the mobile telephone exchange, the call termination report request message, the incoming call dialed by the calling subscriber A call progress step that instructs the call processing procedure to continue by sending a connection message including a number, and as the call path is formed between the calling party and the called party, the mobile telephone exchange will expire when the maximum talk time period set by the service control point expires. The billing processing report message is sent to the service control point, and the service control point is charged according to the billing processing report message. If possible, the originating subscriber's terminal IP address transmission step of sending a temporary connection message including an external IP address to send a broadcast to the mobile telephone exchange, a call path is established between the external IP and the mobile telephone exchange, and the external IP requests the announcement ID to the service control point. As the service control point transmits the announcement broadcast ID to the external IP, the announcement broadcast step of sending the announcement broadcast to the calling subscriber terminal, releases the connection between the external IP and the mobile telephone exchange period, and sends the announcement announcement result. It provides convenience to the 3rd generation mobile communication service user, including the step of releasing the announcement route and the call progress step of transmitting the specific resource allocation result report message to the service control point.

WCDMA, Prepaid Mobile Phones

Description

Voice Call Processing Method for Pre-Paid Service In WCDMA

1 is a configuration diagram of a WCDMA system to which the present invention is applied;

2 is a view for explaining a voice call processing method of a prepaid mobile telephone service according to a first embodiment of the present invention;

3 is a view for explaining a voice call processing method of a prepaid mobile phone service according to a second embodiment of the present invention;

4 is a diagram illustrating a voice call processing method of a prepaid mobile telephone service according to a third embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

200: Packet Switching Device (SGSN) 210: Packet Gateway Switching Device (GGSN)

220: mobile telephone exchange (MSC) 230: home location register (HLR)

240: Service Control Point (SCP) 250: Intelligent Information System (IP)

260: Customer Information System (COIS)

The present invention relates to a prepaid mobile phone service in a mobile communication system, and more particularly, to enable a mobile phone service within a call limit by using a prepaid (PP) card in which a certain amount of call limit is specified in a WCDMA UMTS mobile communication system. It relates to a call processing method.

In general, Pre-Paid Service (PPS) is a kind of intelligent network service that purchases a prepaid (PP) card with a certain amount of call limits and uses the mobile phone service for that amount. If a subscriber with a PP card uses a prepaid mobile phone service using his or her own terminal, the subscriber can use the mobile phone service in the same way as a general subscriber. Mobile phone service is available. The PP mobile phone service subscriber can also check his / her PP card balance and replenish the balance.

However, there is a problem in that there is no specific service definition for a prepaid mobile phone service using a PP card in a WCDMA UMTS mobile communication network, so that a service cannot be provided to a subscriber.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and when a prepaid mobile phone service (PPS) subscriber makes a call, the intelligent telephone trigger is used to query whether the service is available from the mobile switching center to the service control point, and the service control point is the balance of the PPS subscriber. The purpose of this is to ensure that the calling subscriber can make a call by transmitting the time that the subscriber can make a call to the mobile switching center after checking the authority and the authority.                         

In addition, if the balance of the PPS subscriber is less than a certain amount, the purpose is to broadcast the announcement to the subscriber, and if the subscriber's balance is insufficient (less than the lower limit) to release the call.

The present invention for achieving the above object is a voice call processing method of a prepaid mobile phone service in a WCDMA system, and as the subscriber attempts to make a call to a mobile telephone exchange, the originating subscriber is identified as a prepaid mobile phone service subscriber at a home location register. A voice call originating step of requesting a call connection to the mobile telephone exchange when the subscriber is a prepaid mobile telephone service subscriber; When the mobile telephone exchange requests triggering processing to a service control point, the service control point determines that the call is from a prepaid mobile phone service subscriber, checks whether the called number is a non-billing number or a call-prohibited number, The call is continued or released without charge processing, and if it is a non-billing number, the call is released. If it is not a non-billing number or an outgoing call number, the charge amount of the calling subscriber is checked and the charge amount is designated. A charge amount checking step of transmitting a call information request message to the mobile telephone exchange after the call of the calling subscriber is terminated if the amount is more than the amount; A call progress step of instructing the service control point to continue a call processing procedure by transmitting a connection processing message including a charge processing request message, a call termination report request message, and a called number dialed by the calling subscriber to the mobile telephone switch; As a call path is formed between the calling subscriber and the called subscriber, when the maximum talk time period set by the service control point expires, the mobile telephone exchange transmits a charging processing report message to the service control point, and the service control point performs the charging processing. A billing processing step of subtracting the balance of the charged amount according to a report message; As a result of the checking of the charge amount checking step, when the charge amount of the calling subscriber is less than a specified amount and a call is possible, a temporary connection message including an external IP address for transmitting an announcement to the terminal of the calling subscriber is sent to the mobile telephone exchange. Transmitting an IP address; A call path is established between an external IP and the mobile telephone exchange, and the external IP requests the announcement broadcast ID to the service control point, and as the service control point transmits the announcement broadcast ID to the external IP, the external IP causes the call. An announcement broadcast transmitting step of transmitting announcement broadcasting to the calling subscriber terminal; Releasing the connection between the external IP and the mobile telephone exchange period, and releasing a guide broadcast path for transmitting a specific resource allocation result report message which is a result of the announcement of the announcement to the service control point; And returning to the call progress step.

At this time, when the charge amount is possible to talk but is less than the specified amount or if the available money balance is insufficient, the announcement broadcasts the notification to the terminal of the calling subscriber performs a step.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described.

1 is a block diagram of a prepaid mobile telephone service system for applying the present invention.

Referring to Figure 1, the packet switching device (SGSN, 200), the packet gateway switching device (GGSN, 210), trigger detection received from the HLR (230), SSF (Service Switching function) such as query to the SCP 240 A mobile telephone exchange 220 that performs the function, a home location register (HLR) 230 that performs management functions such as prepaid mobile phone service (PPS) subscription, trigger information, and a service control system (SCP) address; SCP 240 for performing management functions such as the upper limit, access IP address, intelligent service control function, Intelligent Peripheral (IP) 250 for performing announcement broadcasting function, and social security number to the customer. In case of retrieving the customer's information by assigning a unique identification number (ID), the customer information system delivers all the service information of the company used by the customer to the HLR 230 or SCP (240) together with the basic information of the customer. (Customer Oriented Information System, COIS) (260) It is composed.

An operation process of an embodiment according to the present invention configured as described above will be described with reference to FIGS. 2 to 4.

2 is an exemplary view showing a voice call processing procedure when the balance according to the present invention is sufficient.

Referring to FIG. 2, when the PPS subscriber (MS) attempts to transmit, the MSC 220 transmits a triggering processing request message (Initial DP) to the HLR address downloaded from the HLR 230 including parameters (S100).

This is to support the additional service control method provided by 2G ANSI. For example, it is not easy for the subscriber to know which network is roaming in 2G or 3G. Therefore, subscribers using PPS in 2G roam to 3G network. If you dial a specific feature code that is the same as 2G for balance check, recharge, etc., if you do not support the supplementary service control method for this processing, the triggering request message (Initial DP) will be sent directly to SCP at this stage. It may be delivered.

After determining that the calling subscriber is a PPS service subscriber, the HLR 230 adds a PPS INAC (IN ACCESS CODE) to the digit dialed by the subscriber and transmits a connection request message (Connect) to the MSC 230 (S101). Herein, PPS INAC (IN ACCESS CODE) indicates a trigger condition for making a corresponding prepaid call, and this message allows the MSC 20 to connect to the corresponding SCP. PPS INAC (IN ACCESS CODE) set in the connection message is detected and a triggering processing request message (Initial DP) including a service key, an event type, and a basic service code parameter is transmitted to the SCP 240 (S102).

Upon receiving the triggering processing request message (Initial DP), the SCP 240 determines the transmission to the PPS subscriber based on the service key and the subscriber information. Basically, the balance announcement can be sent when calling, and the announcement may not be sent if the subscriber does not request or if there is enough charge (preset amount) remaining for the PPS subscriber. Call information including a request report event message (RequestReportBCSMEvent) including an event type parameter for detecting that the called party responds or terminates the call from the SCP 240 and the MSC 220 transmits the call log to the SCP 240. The request message is transmitted to the MSC 220 (S103).

At this time, the SCP 240 should be able to check whether the incoming number is a non-billing number or a call-out number, for example, the non-billing number is dialed 080 (caller charges, caller charges) or a general free call. As in the case of dialing a number, the caller's balance should not be deducted from the caller's balance. In this case, although not shown, a connection message (Continue) may be transmitted to continue the call without charging, or a release call (ReleaseCall) may be terminated.

The SCP 240 transmits a message (ApplyCharging) requesting the billing processing including the time that the subscriber can talk to the MSC 220 (S104). The charge processing request message is transmitted after the announcement is finished, because if the announcement is transmitted before the announcement, the announcement is charged for the time at which the announcement was sent. The maximum talk time set in the billing request message is determined according to the bearer service and the billing rate of the user.

Thereafter, the SCP 240 transmits a report request message (RequestReportBCSMEvent) including an event type (EventTypeBCSM) parameter for detecting that the call is terminated to the MSC 220 (S105). In addition, SCP 240 sends a connection message (Connect) including the called number dialed by the caller to the MSC 220 to instruct the MSC 220 to continue the call processing procedure (S106).

Subsequently, when a call path is formed between the called subscriber and the calling subscriber in steps S107 to S110, and the maximum call time period (MaxCallPeriodDuration) set from the SCP 240 expires, the MSC 220 charges a reporting message (ApplyChargingReport). To the SCP 240 (S111), the SCP 240 receives the charging processing report message (ApplyChargingReport) after subtracting the call charge from the upper limit balance, and then the remaining time that the subscriber can talk Including the second operation for billing processing and reporting is repeated (S111 ~ S112). The reason for transmitting / receiving the billing processing report message for each talk time period is to prevent the loss of the entire billing when a failure occurs during a call.

On the other hand, in the case of transmitting and receiving a billing processing report message for each communication time period as described above can increase the signal message can reduce the profitability of the mobile network operator. However, this problem can be solved by adjusting the maximum talk time period.

SCP 240 receiving the billing report message does not deduct the call charge directly from the actual balance, but deducts the call charge from the temporary balance while managing the temporary balance separately. If another call occurs at the same time during the call and a billing message is issued, it is deducted from this temporary balance. After the call is completed, the balance is subtracted from the actual balance and stored.

Thereafter, the MSC 220 sends an event report message (EventReportBCSM) to the SCP 240 when the subscriber terminates the call and informs that the call is terminated, and then generates billing data including a service key. The charging process report message (ApplyChargingReport) including the time information (TimeInformation) parameter setting the call time of the transmission to the SCP (240) (S113 ~ S114).

At this time, if the SCP 240 has previously requested to the MSC 220 to transmit call information (CallInfomation), the call information report message (CallInformationReport) including the call history of the subscriber to inform the subscriber of the accurate call history (CallInformationReport) Transfer to 240 and ends all procedures (S115).

3 is an exemplary view showing a voice call processing procedure when the balance according to the present invention is less than any amount.

Referring to FIG. 3, when the PPS subscriber attempts to transmit, the MSC 220 transmits a triggering processing request message (Initial DP) to the HLR address downloaded from the HLR 230 including the parameter (S200).

When determining that the calling subscriber is a PPS service subscriber, the HLR 230 adds a PPS INAC (IN ACCESS CODE) to the digit dialed by the subscriber and transmits a connection request message (Connect) to the MSC 220 (S201).

Thereafter, the MSC 220 detects PPS IN ACCESS CODE and transmits a triggering processing request message (Initial DP) including a service key, an event type, and a basic service code parameter to the SCP 240 (S202). .

Upon receiving the triggering processing request message (Initial DP), the SCP 240 determines that the PPS subscriber is using the service key and the subscriber information, and any amount of money set in the SCP 240 (service provider Less than the set amount), the EstablishTemporaryConnection including the IP address to which the announcement is to be transmitted is transmitted to the MSC 220 in order to transmit the announcement. SCP ID (SCFid) necessary to make an announcement request to the SCP (240) includes a correlation ID (Correlation ID) to distinguish between the subscriber (AssistingSSPIPRoutingAddress) (S203). Here, SCFid is to distinguish which SCF to send AssistRequestInstruction (ARI) from IP, and correlation ID is a value included in AssistRequestInstruction that IP sends to SCP. You can do that and point out the appropriate announcement code. As a method of using the SCFid, an INAC (IN ACCESS CODE), a Signaling Point Code (SPC), a service key, etc. may be variously used. That is, the IAM (Initial Address Message) received by the IP from the ISUP includes the IP connection PFX, the SCFid, and the correlation ID. Here, SCFid will indicate which SCP is involved in this connection for IP and correlation ID indicates which subscriber. These information may be included in AssistingSSPIPRoutingAddress or may be included in a separate parameter. When using INAC or service key as SCFid, IP manages signal point by INAC PFX or service key separately, and when receiving the INAC or service key, it sends ARI to the corresponding SCP. Queries directly to the signal point.

Upon receiving the IP address for transmitting the announcement to the PPS subscriber (MS), the MSC 220 prepares to transmit the announcement by setting up a call route with the IP 250 using the ISUP. In this case, the SCP 240 is provided with a function for distributing IP for each originating MSC in preparation for the extension of the network.

The IP 250 transmits an announcement broadcast instruction request message (AssisRequestInstruction) including a correlation ID (CorrelationID) included in an initial address (IAM) to the SCP 240 determined from the SCFid (S204).

When multiple intelligent network services are operating on the single SCP 240, a correlation ID (CorrelationID) has information for distinguishing the intelligent network service as a measure for determining which service is an IP connection due to reception of an announcement request message. Should be That is, an INAC, a signal point, a service key, or the like can be used. The IP 250 needs to implement a function for managing SCP address related data for determining which SCP to connect to according to the SCFid.

The SCP 240 transmits an announcement message (PlayAnnouncement) to the IP 250 by including the announcement type in a basic message ID parameter (S205).

The IP 250 transmits an announcement through the connected communication channel indicating that the balance is less than or equal to the designated amount, and then releases the connection with the MSC 220 in the call, and sends a specific resource allocation result report message (SpecialzedResourceReport) to the SCP. After transmitting to 240, the MSC 220 releases the path using the ISUP (S206).

Subsequent operations S207 to S219 are the same as the operations S103 to S115 described with reference to FIG. 2, and thus detailed descriptions thereof will be omitted.

4 is an exemplary view showing a voice call processing procedure when the balance is insufficient according to the present invention, when the PPS subscriber attempts to make the call, the MSC 220 includes a parameter and triggers the triggering process with the HLR address downloaded from the HLR 230. The request message (Initial DP) is transmitted (S300).

When determining that the calling subscriber is a PPS service subscriber, the HLR 230 adds a PPS INAC (IN ACCESS CODE) to the digit dialed by the subscriber and transmits a connection message (Connect) to the MSC 220 (S301).

Thereafter, the MSC 220 detects PPS IN ACCESS CODE and transmits a triggering processing request message (Initial DP) including a service key, an event type, and a basic service code parameter to the SCP 240 (S302). .

Upon receiving the triggering processing request message (Initial DP), the SCP 240 determines that the PPS subscriber is originating with reference to the service key and the subscriber information, and if it is determined that the charged amount is less than or equal to the minimum set amount for the call. If it is determined that the balance is insufficient, the EstablishTemporaryConnection including the IP address to which the announcement is to be sent is transmitted to the MSC 220 to send the announcement, wherein the SCP 240 is assigned to the IP 250 by the SCP. SCP ID (SCFid) and correlation ID (Correlation ID) for distinguishing subscribers necessary for the announcement of the broadcast announcement to the 240 is included in the parameter AssistingSSPIPRoutingAddress (S303).

Upon receiving the IP address for transmitting the announcement to the PPS subscriber (MS), the MSC 220 prepares to transmit the announcement by setting up a call route with the IP 250 using the ISUP.

The IP 250 transmits an announcement broadcast request request message (AssisRequestInstruction) including a correlation ID (CorrelationID) included in an initial address (IAM) to the SCP 240 determined from the SCFid (S304). Accordingly, the SCP 240 transmits an announcement message (PlayAnnouncement) to the IP 250 by including the announcement type in a basic message ID parameter (S305).

The IP 250 transmits a guide broadcast indicating that the balance is insufficient through the connected communication path, and then releases the connection with the MSC 220 in a call, and sends a specific resource allocation result message (SpecialzedResourceReport) to the SCP 240. After transmitting, the MSC 220 releases the path using the ISUP (S306).

Thereafter, a call release message (ReleaseCall) is transmitted to the MSC 220 to terminate the call of the subscriber, and the MSC 220 terminates the call of the subscriber when receiving the call release message (ReleaseCall) (S307).

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, the embodiments described above are to be understood in all respects as illustrative and not restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

As described above, the present invention enables the subscriber of the 3G mobile communication service and the subscriber of another network roaming into the 3G mobile communication network to use the prepaid mobile phone service without difficulty.

Claims (18)

A voice call processing method of a prepaid mobile phone service in a WCDMA system, A voice call originating step of confirming that the calling subscriber is a prepaid mobile phone service subscriber as a subscriber attempts a call to a mobile telephone switch, and requesting a call connection to the mobile telephone switch when the subscriber is a prepaid mobile telephone service subscriber; When the mobile telephone exchange requests triggering processing to a service control point, the service control point determines that the call is from a prepaid mobile phone service subscriber, checks whether the called number is a non-billing number or a call-prohibited number, The call is continued or released without charge processing, and if it is a non-billing number, the call is released. If it is not a non-billing number or an outgoing call number, the charge amount of the calling subscriber is checked and the charge amount is designated. A charge amount checking step of transmitting a call information request message to the mobile telephone exchange after the call of the calling subscriber is terminated if the amount is more than the amount; A call progress step of instructing the service control point to continue a call processing procedure by transmitting a connection processing message including a charge processing request message, a call termination report request message, and a called number dialed by the calling subscriber to the mobile telephone switch; As a call path is formed between the calling subscriber and the called subscriber, when the maximum talk time period set by the service control point expires, the mobile telephone exchange transmits a charging processing report message to the service control point, and the service control point performs the charging processing. A billing processing step of subtracting the balance of the charged amount according to a report message; As a result of the checking of the charge amount checking step, when the charge amount of the calling subscriber is less than a specified amount and a call is possible, a temporary connection message including an external IP address for transmitting an announcement to the terminal of the calling subscriber is sent to the mobile telephone exchange. Transmitting an IP address; A call path is established between an external IP and the mobile telephone exchange, and the external IP requests the announcement broadcast ID to the service control point, and as the service control point transmits the announcement broadcast ID to the external IP, the external IP causes the call. An announcement broadcast transmitting step of transmitting announcement broadcasting to the calling subscriber terminal; Releasing the connection between the external IP and the mobile telephone exchange period, and releasing a guide broadcast path for transmitting a specific resource allocation result report message which is a result of the announcement of the announcement to the service control point; And Returning to the call progress step; Voice call processing method of a prepaid mobile phone service in a WCDMA system comprising a. According to claim 1, The checking of the charge amount of the calling subscriber by the service control point further comprises the step of transmitting the charge amount to the calling subscriber by announcement. The method of claim 1. And the call information request message indicates a call log of the calling subscriber and includes an event type parameter for detecting call termination. delete delete delete According to claim 1, And the charging processing request message includes a maximum talk time period in the WCDMA system. According to claim 1, The billing processing step is repeated until the call path of the calling party and the called party is released, the voice call processing method of the prepaid mobile phone service in the WCDMA system. According to claim 1, And after the charging processing step, transmitting, by the mobile communication switch, a call record, a billing report message, and a call information message to the service control point. According to claim 1, The billing processing step is a voice call processing method of a prepaid mobile phone service in a WCDMA system, characterized in that after subtracting the call charges from the temporary balance, the actual balance after the end of the call, the balance is stored. delete According to claim 1, And the announcement is a message for notifying that the balance of the recharge amount is less than or equal to a predetermined amount. delete delete delete According to claim 1, And transmitting, by the service control point, the announcement broadcast ID to the external IP, by distributing IP for each originating exchange. delete delete

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