KR100838041B1 - Method of providing emm for digitnal mobile broadcasting - Google Patents

Abstract

A method for providing an EMM(Entitlement Management Message) for a mobile broadcast service is provided to quickly transmit an EMM to a reception terminal if the EMM is changed according to a change in user information of a mobile broadcast service subscriber. If subscriber information is changed, a BIS(Business Information System) transmits a message regarding the change in the subscriber information to a CAS(Conditional Access System), and the CAS generates an EMM based on the message and transmits it an MS(Mobile Station) server(S2). The MS server transmits the EMM to a mobile communication network server of a mobile communication network(OOB(Out Of Band)) to which the subscriber has been registered(S4). The mobile communication network server transmits the EMM to a reception terminal, and in this case, if the reception terminal cannot receive the EMM due to a certain abnormal situation, the mobile communication network server transmits a transmission failure message to the MS server(S6). Upon receiving the transmission failure message, the MS server transmits the EMM to the mobile communication network server at every predefined time so that the EMM can be re-transmitted to the reception terminal(S8,S10).

Description

Method of providing EMM for mobile broadcasting service {METHOD OF PROVIDING EMM FOR DIGITNAL MOBILE BROADCASTING}

1 is a diagram illustrating a mobile broadcasting service subscriber management system according to the related art.

2 is a diagram illustrating a subscriber management system of a mobile broadcasting service according to the present invention.

3 is a diagram illustrating a part of an EMM providing method of a subscriber management system of a mobile broadcasting service according to the present invention.

The present invention relates to a method for providing an EMM for a mobile broadcast service. More particularly, the present invention relates to a process for performing a case where an EMM transmitted through a mobile communication network is not normally received at a receiving terminal in a system for performing subscriber management of a mobile broadcast. will be.

The mobile broadcast service refers to a broadcast service that allows subscribers to watch or listen to various multimedia broadcasts such as video, audio, and data through a personal portable or vehicle receiving terminal equipped with a reception antenna outdoors or on the move.

The service is able to provide high quality sound, various data services, two-way interactivity, excellent mobile reception quality, etc. by digitizing the previous analog broadcasting form, and expanded the broadcasting to see, hear and participate in the existing concept of watching and listening broadcasting. Through data broadcasting, various multimedia information such as news, traffic information, weather information, geographic location information, and video information can be transmitted in text and graphics.

On the other hand, since the above-mentioned mobile broadcasting service is generally a paid service, a CAS (Conditional Access System) is applied to restrict reception of subscribers. The CAS performs a reception restriction function by setting a viewing grade through a smart card embedded in each receiving terminal.

This technique is described in detail with reference to FIG. 1. 1 is a block diagram showing a mobile broadcast service subscriber management system according to the prior art.

As shown in FIG. 1, the subscriber management system includes a customer management device (BIS) that manages subscriber information of a mobile broadcast service, subscriber information related to a viewer's viewing qualifications and a rating of a paid channel. A conditional access system (CAS) 20 which generates an EMM and transmits the EMM to a receiving terminal through a broadcasting network, and receives a broadcast signal and an EMM transmitted through the broadcasting network. It includes a receiving terminal 50 for interpreting the EMM to display only the broadcast signal corresponding to the viewing rating on the screen.

Here, the receiving terminal 50 may further include a smart card that stores subscriber information and receives and sets an EMM to view a rating.

Referring to the operation of such a system, first, the BIS 10 manages information such as mobile terminal service subscriber information (ie, receiving terminal information, smart card information, mobile broadcasting subscription information, and subscriber personal information) such as creation, modification, and termination. While performing, when a change event such as generation, change, termination, etc. of the subscriber information occurs, the smart card number of the corresponding subscriber receiving terminal 50 is transmitted to the CAS 20 together with the change situation.

The CAS 20 generates an EMM including the smart card number and the change situation and transmits the EMM to all receiving terminals 50 through the broadcasting network. That is, the CAS 20 manages user's viewing qualifications, viewing ratings for paid channels, etc. through the EMM. In this case, the EMM is associated with information regarding a channel viewing eligibility of a receiving terminal user and a viewing grade for a paid channel.

Therefore, the receiving terminal 50 parses the EMM transmitted from the broadcasting network and manages the viewing qualification and the rating for the paid channel only when it matches the key information of the embedded smart card.

However, the EMM transmitted from the CAS 20 to the receiving terminal is sent out to the receiving terminal 50 of all the subscribers approximately once every 30 minutes, and once the receiving terminal 50 is located in the shaded area, If you miss the reception, you have to wait until the next transmission of the EMM, so there was an inconvenience of not being able to receive the changed ratings and the ratings for the paid channels in time.

An object of the present invention is to transmit an EMM using an out-of-band (OOB) network, not a broadcast network, and to receive a terminal due to an exceptional situation such that the receiving terminal is powered off or the terminal is not registered with the exchange. Since the EMM transmission cannot be guaranteed 100%, such as when the EMM reception fails, to provide an EMM providing method for a mobile broadcast service to increase the transmission success rate.

The present invention for achieving the above object, the customer management device when the subscriber information changes, transmitting a message about the change in the subscriber information to the reception restriction device; Generating, by the reception restriction device, the EMM according to a change of internal information and transmitting the same to an MS server; Transmitting, by the MS server, the EMM to a mobile communication network server of a mobile communication network to which the subscriber is registered; Transmitting, by the mobile communication network server, the EMM to a receiving terminal; When the receiving terminal does not receive the EMM, transmitting a transmission failure message from the mobile communication network server to the MS server; At the MS server receiving the transmission failure message, transmitting the EMM to the mobile communication network server at predetermined time intervals and retransmitting the EMM to the receiving terminal; If the receiving terminal receives the EMM, the mobile communication network server comprises the step of transmitting the transmission complete message to the MS server to terminate the EMM providing process.

The mobile terminal may further include transmitting, by the mobile communication network server, a transmission completion message to the MS server when the receiving terminal normally receives the EMM.

The method may further include determining, by the customer management device, whether the reception terminal of the subscriber is a mobile communication service and a mobile broadcast service; And transmitting a message according to whether or not to be used according to the determination result and a change in subscriber information to the reception limiting device.

In addition, the transmission failure message, characterized in that it contains information indicating the cause of the transmission failure to the receiving terminal.

The predetermined time may be changed based on the cause of the transmission failure of the transmission failure message.

The EMM may be terminated when the transmission failure is one of a fault, a change in a subscribed mobile communication network, no use of a mobile communication network, and an SMS rejection state.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram illustrating a subscriber management system of a mobile broadcasting service according to the present invention. The subscriber management system, as shown, BIS (management management device 10) for managing subscriber information of the mobile broadcast service, generates an EMM according to the change of the subscriber information and transmits the EMM to the MS server 30 to be described later A mobile station (MS) server 30 which receives the CAS 20 and the EMM, and transmits the EMM to the mobile communication network server 40 of the mobile communication provider corresponding to the receiving terminal number included in the EMM. ), At least one mobile communication network server 40 transmitting the EMM transmitted from the MS server 30 to the receiving terminal 50 through the corresponding mobile communication network, and receiving the EMM transmitted through the mobile communication network. And a receiving terminal 50 for displaying the broadcast signal transmitted through the broadcasting network on the screen according to a predetermined viewing grade. In addition, the receiving terminal 50 may include a smart card (not shown) that stores subscriber information, receives an EMM, and sets and changes a rating.

The BIS 10 generates, changes, or terminates the subscriber information while performing management such as generating, changing, or canceling information of a mobile broadcasting service subscriber (ie, receiving terminal information, smart card information, subscriber personal information, etc.). When the same change occurs, the CAS 20 transmits the smart card number and the receiving terminal information of the subscriber receiving terminal 50 together with the change. In this case, the receiving terminal information may be mobile communication company information and the receiving terminal telephone number.

The CAS 20 generates the EMM including the smart card number and the changes thereof, and sends the EMM to the receiving terminal 50 through the MS server 30, the mobile communication network server 40, and the mobile communication network.

That is, the CAS 20 manages the user's viewing qualifications, the viewing grades for the paid channels, etc. through the EMM, and the EMM receives information on the viewing grades of the receiving terminal user and the viewing grades for the paying channels, and the smart card. Include a number.

Therefore, only the receiving terminal 50 corresponding to the smart card number changes information related to the viewing qualification and the rating for the paid channel. In this case, the CAS 20 may include and transmit information on whether the subscriber is authenticated in the EMM, or may independently generate and transmit the EMM by using only a message including the subscriber authentication and the change of subscriber information.

The MS server 30 functions as a message interpretation server between the CAS 20 and the mobile communication network server 40 of the mobile communication network, and includes information in the EMM that can manage sessions for each mobile communication company. After that, the EMM is processed into a format that the mobile communication network server 40 can receive and transmitted to the mobile communication network server of each mobile communication company.

The mobile communication network server 40 is a server constructed for each mobile communication company, and if necessary, processes the EMM into a data format that can be transmitted through the mobile communication network (OTA or SMS in the present invention) and transmits the same to the receiving terminal.

The processing of the EMM may be performed at any one of the MS server 30 and the mobile communication network server 40.

The receiving terminal 50 is a combined receiving terminal capable of simultaneously providing a mobile broadcast receiving service and a mobile communication service function. In addition, after receiving and parsing the EMM, the receiving terminal 50 views when the smart card number included in the EMM matches the smart card number (or authentication information) embedded in the receiving terminal 50. It stores qualifications, various key information for viewing and viewing grades for paid channels, and receives and displays broadcast signals transmitted through the broadcasting network on the screen.

3 is a diagram illustrating a part of an EMM providing method of a subscriber management system of a mobile broadcasting service according to the present invention. That is, the process of providing the EMM to the receiving terminal 50 by the MS server 30 receiving the EMM generated by the CAS 20 is shown.

First, when the subscriber information is changed, when the BIS 10 transmits a message regarding the change of the subscriber information to the CAS 20, the CAS 20 generates an EMM based on the message and the MS server 30 (S2), the MS server 30 transmits the EMM to the mobile communication network server 40 of the mobile communication network in which the subscriber is registered (S4).

Accordingly, the mobile communication network server 40 transmits the EMM to the receiving terminal 50. In this case, when the EMM transmitted from the receiving terminal 50 cannot be received due to a predetermined abnormal situation, that is, the mobile communication network server When the reception completion of the reception terminal 50 cannot be confirmed at 40, the mobile communication network server 40 transmits a transmission failure message including information indicating the cause of the transmission failure to the MS server 30 ( S6).

In response to the transmission failure message, the MS server 30 transmits the EMM to the mobile communication network server 40 at predetermined time intervals according to a predetermined retransmission policy and retransmits it to the receiving terminal 50 ( S8, S10).

Subsequently, when the mobile communication network server 40 and the receiving terminal 50 normally transmit and receive the EMM (S12), the mobile communication network server 40 transmits a transmission completion message to the MS server 30 to transmit the EMM. Allow the retransmission process to end.

In this procedure, the retransmission policy for each transmission failure cause, which needs to be determined in advance, will be described in more detail.

Upon transmission failure of the EMM through the mobile communication network, the MS server returns a transmission failure message. The returned transmission failure message includes information on the cause of the transmission failure, and according to the cause, the MS server automatically performs the retransmission procedure. If the transmission is successful by the retransmission, the retransmission procedure in progress is terminated.

The period of retransmission is set differently according to the cause of transmission failure so as to minimize information processing delay through the mobile communication network, and examples of the cause of transmission failure are shown in Table 1.

SYS-Type Reason for failed transmission Explanation  OTA UNKNOWN_NETWORK_NODE_NUMBER Overseas roaming, WOS exchange not registered (SKT) INVALID_PROTOCOL_REVISION Change device (SKT) UNEXPECTED_PARAMETER ported out subscriber (SKT) HLR Access Denied Reason DENIED KTF POSTPONED power off (KTF) UNAVAILABLE No power on after joining MSC SMS Cause Code NO_PAGE_RESPONSE Location not registered (common) NO_ACKNOWLEDGMENT Switch not answered (common) OTA683 NOT_SUPPORTING_MOBILE Change device (SKT)  WCDMA HLR UNKNOWN_SUBSCRIBER SKT ABSENT_SUBSCIBER_SM power off (SKT) TELE_SERVICENOT_PROVISIONED SMS Unsubscribe (SKT) CALL_BARRED Debit / Destination / COIS registration error (SKT)

The retransmission policy is classified into three types according to the cause of transmission failure, and the retransmission time interval is applied differently as follows.

Code 1 (Default): Every 3 minutes until the 10th retransmission, every 10 minutes from the 11th to the 20th.

Code 2 (Power off): Every 60 minutes until the 10th retransmission, every 360 minutes from the 11th to the 20th.

Code 3 (OTA Not Connected): Every 10 minutes until the 10th retransmission, every 20 minutes from the 11th to the 20th.

1) Power off

When the receiving terminal is powered off, the message cannot be transmitted through the mobile communication network. Therefore, the automatic retransmission procedure is performed after the transmission failure processing. If the receiving terminal is turned on during the retransmission period and the mobile communication-related operation is in a normal state, the MS server which receives the notification from the mobile communication network server immediately retransmits, so it is not necessary to set a short retransmission period. Therefore, the retransmission policy is set as code 2, and the retransmission period is set to be long at intervals of 60 minutes from the 10th to 6 hours from the 11th to 20th.

The notification procedure is a procedure for notifying the MS server to the MS server when the receiving terminal is available after the previous EMM delivery request is notified of failure due to inactivation or the like. The mobile network server manages the retransmission policy by itself. If it has a function of retransmitting the EMM, it may not be implemented.

Meanwhile, after receiving the notification, the MS server may restart the EMM transmission procedure according to the retransmission policy or discard the EMM without performing any operation.

2) For OTA Not Connected

If the transmission fails because the connection between the mobile communication network server and the MS server is lost due to network operation or line failure, the retransmission policy is applied with code 3 and retransmitted every 10 minutes from 10th to 20th from 11th to 20th.

3) in the case of exceptional circumstances

In order to reduce the load on the MS server in exceptional cases where the EMM transmission can be processed normally by modifying the customer information of the mobile carrier, such as in case of no number, porting, OTA (or SMS) access rights, or SMS rejection status Do not retransmit automatically.

4) In case of general failure

For all transmission failures except exceptions, power off and OTA Not Connected, code 1 of the retransmission policy applies.

5) If the MIN (mobile phone number) is the same due to the change of subscriber's device but the CAS number is changed, the revocation message should be sent to the existing receiving terminal first, and then the revocation process must be sent to the new receiving terminal. . If transmission of the termination message fails because the existing receiver terminal is turned off, the message is automatically retransmitted. Therefore, the message transmitted to the new terminal is stored in the stack for 20 failed retransmission cycles. .

Therefore, in the case of device change, when the termination message for the existing terminal fails to be powered off, the MS server stops transmitting the termination message for the opening process of the new terminal and transmits the opening message to the new receiving terminal.

When the EMM is changed due to the change of the user information of the mobile broadcasting service subscriber by the automatic retransmission of the EMM using the retransmission policy, the EMM can be quickly transmitted and applied to the subscriber's receiving terminal.

The processing in such cases is merely an example, and the present invention is not limited thereto.

As described above, the present invention provides an exception in the case of transmitting an EMM using an out-of-band (OOB) network rather than a broadcasting network, such as when the receiving terminal is powered off or the terminal is not registered with the exchange. If the receiving terminal fails to receive the EMM, the EMM is automatically retransmitted every predetermined time. When the user information of the mobile broadcasting service subscriber is changed and the EMM is changed, the EMM is quickly transmitted to the receiving terminal. It can be applied.

Claims (7)

1) when the customer management device changes the subscriber information, transmitting a message regarding the change of the subscriber information to the reception restriction device; 2) generating, by the reception restriction device, the EMM according to the change of internal information and transmitting the generated EMM to the MS server; 3) the MS server transmitting the EMM to a mobile communication network server of a mobile communication network to which the subscriber is registered; 4) transmitting, by the mobile communication network server, the EMM to a receiving terminal; 5) when the mobile communication network server determines that the EMM has not been transmitted to the receiving terminal, forming a transmission failure message based on the determination result and transmitting it to the MS server; 6) in the MS server receiving the transmission failure message, transmitting the EMM to the mobile communication network server at a predetermined time for each of at least one cause of transmission failure, and retransmitting it to the receiving terminal; 7) when the receiving terminal receives the EMM, transmitting the transmission completion message from the mobile communication network server to the MS server so that the EMM providing process is terminated. The method of claim 1, wherein step 5) When the receiving terminal receives the EMM, the mobile communication network server further comprising the step of transmitting a transmission completion message to the MS server. The method of claim 1, wherein step 1) When the customer management device changes subscriber information, determining whether the subscriber's receiving terminal is a mobile communication service and a mobile broadcasting service; And And transmitting a message according to whether or not combined and subscriber information changes to the reception limiting device according to the determination result. The method of claim 1, The transmission failure message, the EMM providing method for a mobile broadcast service, characterized in that it includes information indicating the cause of transmission failure to the receiving terminal. The method of claim 1, The predetermined time may be changed based on the cause of the transmission failure of the transmission failure message. The method of claim 4, wherein And if the cause of the transmission failure is any one of a missing number, a change of a subscribed mobile communication network, no permission to use a mobile communication network, and an SMS rejection status, terminating the EMM providing process. The method of claim 1, Either one of the MS server and the mobile communication network server, the EMM providing method for a mobile broadcast service, characterized in that for processing the EMM in a data format that can be transmitted through the mobile communication network.

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