KR20070076129A - Method and apparatus for processing entitlement management message in dmb terminal - Google Patents

Abstract

A method and an apparatus for processing entitlement management messages in a DMB terminal are provided to improve speed of processing entitlement management messages by reducing ON/OFF frequency of a broadcasting module to one time in processing the entitlement management messages transmitted through an OTA(Over The Air) for CAS(Conditional Access System) related work, thereby stably performing the CAS related work. The number of whole entitlement management messages included in received entitlement management messages is grasped(S410). It is confirmed whether the entitlement management messages are all processed(S420). If the entitlement management messages are not all processed, a flag is set up(S430). It is confirmed whether a message is a first entitlement management message(S440). If so, a broadcasting module is initialized(S441). It is confirmed whether a message is a final entitlement management message(S460). If so, the broadcasting module is turned off(S461). When all entitlement management messages are processed, entitlement management message processing is terminated(S480).

Description

Method and apparatus for processing Entitlement Management Message in DMB terminal

1 shows a configuration diagram of a system for processing a qualification management message.

2 is a flow chart of a qualification management message processing according to the prior art.

3 shows a relationship between a module for processing a DMB broadcast and an entitlement management message in a DMB dual terminal.

4 is a flowchart illustrating a qualification management message processing according to the present invention.

5 shows a flag setting process.

6 shows bit allocation for flag setting.

<Explanation of symbols for the main parts of the drawings>

310: receiver 320: counter

330 flag setting unit 340 broadcasting module

341: message processing unit 350: decoder

360: playback unit 370: control unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital multimedia broadcasting (hereinafter referred to as "DMB") combined terminal. In particular, the processing speed of Entitlement Management Message (Over The Air, OTA) transmitted through a mobile communication network is improved. It is about how to.

Digital multimedia broadcasting refers to a broadcasting service that enables a user to watch various multimedia broadcasting in a multi-channel on the go through a personal portable receiver or a vehicle receiver equipped with an omnidirectional receiving antenna. In particular, the satellite DMB adopted in Korea is a standard of the International Telecommunication Union (ITU) Rec. BO.1130-4: System-E adopts Code Division Multiplexing (CDM) technology similar to CDMA mobile phones.

In general, a Motion Picture Experts Group (MPEG) -2 transport stream is used as a transmission standard for satellite digital multimedia broadcasting. According to the DMB broadcasting standard, the DMB is a pilot channel for transmitting configuration information of a CDM channel including Walsh code information, and a reception for transmitting authentication information for receiving DMB broadcasting. It consists of a Conditional Access System (CAS) channel, an Electronic Program Guide (EPG) channel for transmitting information about a service channel, and at least one media channel for transmitting actual transport stream packet data.

In particular, as the CAS message is delivered only when the terminal is in DMB viewing state, in order to fundamentally solve the problem that entitlement may not be granted in time when a customer joins, terminates, or changes, the subscription or termination of CAS in the case of a DMB dual terminal And a message such as a change and the like can be processed regardless of the state of the terminal using a CDMA mobile communication network (OTA).

OTA-EMM refers to an Entitlement Management Message (EMM) that handles CAS-related operations delivered through the OTA network.

In general, the information needed for descrambling is contained within certain access control meshes called Conditional Access Messages (CAMs) including at least one Entitlement Control Message (ECM) and one Entitlement Management Message (CAM). Is sent. Entitlement control messages depend on the Control Word (CW) and the service key, while entitlement management messages depend on the service key and the user key. The entitlement control message and the entitlement management message are sent to the terminal periodically and continuously.

1 shows a configuration diagram of a system for processing an entitlement management message. First of all, the entitlement management message is transmitted wirelessly to all messages related to customer processing such as new subscription, termination and / or change received from the satellite DMB subscriber management system 10. Transfer to MS (Mesage System) server 20. MS server is a server that provides an interface that allows messages that use the out-of-band to be delivered to the terminal.

The MS server 20 integrates and manages all operators and transmits the entitlement management message received from the satellite DMB subscriber management system to the corresponding OTA server 30 of each operator. The OTA server 30 is a server for providing a wireless communication network, and may be a server of a mobile communication company. Currently, as shown in FIG. 1, there are mobile communication companies such as SK Telecom, KTF, and LG Telecom. The MS server 20 manages whether the message is normally sent, and attempts to retransmit if the message fails to be sent. The message transmission standard between the OTA server 30 and the terminal follows the standard (IS-683, IS-725).

 When the DMB dual-use terminal 50 receives the entitlement management message through the mobile communication network, the entitlement management message is delivered to the CA task (TASK) of the DMB module, the entitlement management message is processed by the CA task, and undergoes an authentication procedure. At this time, if the DMB module is turned off, turn on the DMB module and deliver the credential management message. After completing the work, the DMB module should be turned off again.

2 is a flowchart illustrating a method of processing an entitlement management message in a conventional manner when a DMB dual terminal is not in a DMB broadcasting state.

First, determine the total number (N) of entitlement management messages included in the received entitlement management message message (S210). Check whether all N credential management messages have been processed (S220), and if not all are processed, initialize and start a broadcast module to process one credential management message (S230). In other words, the broadcasting module is turned on. After the broadcasting module is turned on, one qualification management message is processed (S240), and the broadcasting module is turned off again (S250). This process is repeated as many as N times the total number of entitlement management messages (S260). That is, it is checked whether all N messages have been processed (S220). If not, all of the following messages are processed, and if all of them have been processed, the qualification management message processing is terminated (S270).

As described above, according to the related art, the broadcasting module should be turned on / off every time the entitlement management message is processed. Since the number of entitlement management messages required to process a CAS task varies depending on the type of the task, when the number of entitlement management messages is large, the number of ON / OFF times of the broadcasting module increases. For example, the number of entitlement management messages required for a new subscription is 6, the number of entitlement management messages required for an impulse pay per view (IPPV) addition operation is one, and the number of entitlement management messages required for service termination is four. . That is, in the case of a new subscription, six credential management messages must be processed, and in the case of non-DMB broadcasting, the broadcasting module must be turned ON / OFF six times. IPPV (Impulse Pay Per view) is a PPV (Pay Per View) system that pays only for the program you watch.

However, since it takes a long time to initialize and start the broadcast module, there is a problem that it takes a considerable time to process all of the entitlement management messages when the number of entitlement management messages is large.

An object of the present invention is to solve the above problems, the DMB subscriber management system message to the qualification management message transmitted by the DMB subscriber management system for the CAS-related operations such as subscription, termination and / or change when the DMB broadcast state is not To provide a method and apparatus for reducing the time required to process the.

The method for processing entitlement management message according to the present invention,

Determining the number of all entitlement management messages received;

And processing the entitlement management message. The DMB dual terminal comprising: starting and terminating the broadcast module only once regardless of the number of the entitlement management messages.

In addition, the method for processing a credential management message according to the present invention is characterized in that the broadcasting module is started when the credential management message is the first message.

In addition, the method for processing an entitlement management message according to the present invention is characterized in that the broadcasting module is terminated when the entitlement management message is the last message.

In addition, the credential management message processing method according to the present invention,

Determining the number of all entitlement management messages received;

Processing the entitlement management message; comprising the step of: setting a flag for confirming whether the received entitlement management message is the first or the last message; Irrespective of the number of times, the broadcasting module starts and ends only once.

In addition, the method for processing an entitlement management message according to the present invention is characterized in that the broadcasting module is started when the flag indicates the first message.

In addition, the method for processing an entitlement management message according to the present invention is characterized in that the broadcasting module is terminated when the flag indicates the last message.

In addition, the method for processing a credential management message according to the present invention is characterized by allocating 2 bits for setting the flag.

In addition, the method for processing a credential management message according to the present invention is characterized in that 1 is set to a lower bit when the credential management message received when the flag is set is the first message.

In addition, the method for processing a credential management message according to the present invention is characterized in that, if the credential management message received at the flag setting is the last credential management message, 1 is set to an upper bit.

In addition, the entitlement management message processing device according to the present invention,

Receiving unit for receiving a qualification management message;

A counter unit to identify the number of received messages and determine the order of received messages;

A broadcast module for processing the received message and demodulating the received digital broadcast data to generate a transport stream;

And a control unit controlling to start or end the broadcasting module according to the checked message of the counter unit.

In addition, the apparatus for processing entitlement management message according to the present invention may further include a flag setting unit for setting a flag indicating whether the received entitlement management message is first or last.

In addition, in the present invention, the control unit may include controlling to start or end the broadcasting module by checking a flag of the flag setting unit.

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

3 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

A terminal for achieving the object of the present invention includes a receiving unit 310 for receiving a digital broadcasting and qualification management message, a counter unit 320 for counting the received qualification management message and confirming the order of the received qualification management message. A flag setting unit 330 for setting a flag indicating whether it is the first or the last; a broadcast module 340 for processing the received entitlement management message and demodulating the received digital broadcast data to generate a transport stream; A decoder 350 for receiving and decoding a transport stream, a reproducing unit 360 for reproducing digital multimedia broadcasting, a control unit 370 for starting or terminating a broadcasting module according to signals of the counter and flag setting unit, and a reception restriction system And a smart card 380 for recording data required for (CAS).

When the qualification management message is received through the receiver 310, the number of the qualification management messages received by the counter unit 320 is determined, and the received order is checked to confirm the first and last messages. When the order of the messages is confirmed, the flag setting unit 330 sets flags indicating the first and last messages. At this time, if there is only one credential management message, a flag indicating the first message and a flag indicating the last message are simultaneously set.

The controller 370 checks the set flag and starts the broadcasting module in the case of the flag indicating the first message and ends the broadcasting module in the case of the flag indicating the last message.

The broadcast module 340 starts or ends under the control of the controller and includes a message processor 341. That is, in the case of the first entitlement management message, the broadcast module starts under the control of the controller and processes the work procedure required for authentication in the message processing unit, and if it is not the first entitlement management message, the broadcast module processes the message immediately without starting the broadcast module. . In the case of the last qualification management message, the broadcast module is terminated under the control of the controller. In addition, when the credential management message and the credential control message are extracted and sent to the smart card 380, the smart card stores the information, generates a descramble key using the generated information, and delivers the descramble key to the decoder 350. Decryption is used to decode and the audio and video signals are decoded and reproduced by the playback unit 360.

4 is a flowchart illustrating a method of processing an entitlement management message message according to an embodiment of the present invention when the DMB dual terminal is not in a broadcast state.

First, the number (N) of all the entitlement management messages included in the received entitlement management message message is determined (S410).

After grasping the number of qualification management messages, it is checked whether all N qualification management messages have been processed (S420), and if not all are processed, a flag is set (S430), and when all are processed, message processing ends (S480). .

The flag setting method will be described with reference to FIGS. 5 and 6.

First, referring to FIG. 5, first, a bit allocated to display the first credential management message (hereinafter, FS) and a bit allocated to display the last credential management message (hereinafter, LT) are set to 0 (S510). If the received credential management message is the first credential management message (S520), FS is set to 1 (S521), and if the last credential management message (S530), LT is set to 1 (S531).

6 shows bits allocated for flag setting.

For example, if you use 2 bits to set the flag, use the low bit as FS and the high bit as LT. That is, if FS is 1, the first credential management message may be set. If LT is 1, the last credential management message may be set. If both FS and LT are 0, the credential management message located in the middle may be set.

When the flag is set in the same manner as in FIG. 5, it is checked whether the first qualification management message is present (S440). With reference to the flag setting, if FS is 1, it is recognized as the first qualification management message. If it is the first qualification management message, the broadcast module is initialized and started (S441). In other words, the broadcasting module is turned on. If it is not the first credential management message, the credential management message is processed immediately and the authentication procedure is performed. In the first credential management message, the credential management message is processed after initializing and starting the broadcast module. If it is not the first time, since the DMB module is already in the ON state, it is possible to process the credential management message without going through a separate procedure.

After processing the message, it is checked whether or not the last qualification management message (S460). If the flag LT set in the above procedure is 1, it is recognized as the last qualification management message. In the case of the last entitlement management message, the broadcasting module is terminated (OFF), and then the process returns to the step of checking whether the entitlement management message is processed (S420). The process returns to whether the management message is processed (S420).

If it is determined that all the entitlement management messages have been processed after the last entitlement management message is checked, the entitlement management message processing is terminated (S480).

 For example, the credential management message for processing a new CAS subscription is composed of six credential management messages. Therefore, the DMB module is turned on when the first credential management message is processed, and when the second to fifth credential management messages are processed, the DMB module is immediately transferred to the message processing unit for processing such as an authentication procedure. Turn off the module.

As another example, the entitlement management message for processing the CAS impulse pay per view (IPPV) addition operation is composed of one message. In this case, since one credential management message is the first and last credential management message, the broadcast module is first turned on, and then the broadcast module is turned off again after processing the credential management message.

In the above embodiment, the flag is set to check whether the qualification management message is the first or the last, but the order of the flags may be grasped without the flag setting step (S430).

In step S410 of determining the total number of entitlement management message messages, the random parameter is set to i = 1 for counting, and the number of parameters i is increased by increasing the parameter i one by one each time the loop passes. Since 1 can be recognized as the first entitlement management message and i can be recognized as the last entitlement management message when i is N, the same effect can be obtained even without the above flag setting step (S430).

However, by setting a flag as described above, even if the recognition of the parameter i and the ON / OFF of the broadcasting module are processed in another module, it is possible to recognize whether it is the first or the last qualification management message.

The present invention described above may be substituted or changed in various ways without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited.

As described above, according to the present invention, the broadcasting module is turned on and off when the DMB dual terminal processes the entitlement management message transmitted through the mobile communication network (OTA) received for CAS related operations such as subscription, termination, and / or change. The message processing speed is improved by reducing the number of times to be one. If it takes a long time to process the entitlement management message, if an unexpected event such as battery removal occurs during processing, CAS-related work cannot be performed normally. In this case, the user needs to re-request the work to the customer center. Although there is a problem, according to the present invention, it is possible to perform a CAS related work more stably by improving the processing speed of the qualification management message, thereby preventing customer complaints that may occur in the future.

Claims (12)

Determining the number of all entitlement management messages received; And processing the credential management message, wherein the credential management message processing method comprises starting or terminating the broadcasting module only once regardless of the number of the credential management messages. The method of claim 1, wherein the broadcast module is started when the entitlement management message is the first message. The method of claim 1, wherein the broadcast module is terminated when the entitlement management message is the last message. Determining the number of all entitlement management messages received; Processing the entitlement management message; comprising the step of: setting a flag for confirming whether the received entitlement management message is the first or the last message; The credential management message processing method, characterized in that the broadcasting module is started or terminated only once regardless of the number. 5. The method of claim 4, wherein starting a broadcast module when the flag indicates a first message. 5. The method of claim 4, wherein the broadcast module is terminated when the flag indicates a last message. 5. The method of claim 4, wherein two bits are allocated for the flag setting. 5. The method of claim 4, wherein if the credential management message received when the flag is set is a first message, 1 is set to a lower bit. 5. The method of claim 4, wherein if the credential management message received when the flag is set is a last credential management message, 1 is set to an upper bit. Receiving unit for receiving a qualification management message; A counter unit to identify the number of received messages and determine the order of received messages; A broadcast module for processing the received message and demodulating the received digital broadcast data to generate a transport stream; And a control unit for controlling to start or end the broadcasting module according to the checked message of the counter unit. The apparatus of claim 10, further comprising a flag setting unit that sets a flag indicating whether the received credential management message is first or last. 12. The apparatus of claim 11, wherein the controller is configured to check the flag of the flag setting unit to control to start or end the broadcasting module.

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