KR20040088846A - Method for offering broadcast service in a mobile communication system - Google Patents

Abstract

PURPOSE: A method for supplying a broadcast service in a mobile communication system is provided to enable a terminal to transfer broadcast accounting/authenticating data of a user to a new broadcast PDSN(Packet Data Service Node) from a PDSN which manages an accounting/authenticating profile of the user. CONSTITUTION: An MS(101) receives a BSPM(Broadcast Service Parameter Message)(301), and transmits a registration message to a BS(105)(303). A broadcast service is supplied from the first PDSN(109a)(305,307). The MS(101) generates a registration message including a previous broadcast service identifier and a new broadcast service identifier to transmit the message to the BS(105)(313). A PCF(Packet Control Function)(107) receiving an IOS message checks whether the two identifiers should receive broadcast services from different PDSNs(317). If the PDSN is changed, the first PDSN(109a) is selected(319). The PCF(107) selects the second PDSN(109b) according to the new broadcast service identifier(325). The second PDSN(109b) stores authentication/accounting information, and prepares to supply a broadcast service(327,329). The PCF(107) transmits an IOS reply message to set a bearer path between the BS(105) and the PCF(107)(333). The broadcast service is provided to the MS(101) from the second PDSN(109b)(335).

Description

How to provide broadcasting service in mobile communication system {METHOD FOR OFFERING BROADCAST SERVICE IN A MOBILE COMMUNICATION SYSTEM}

The present invention relates to a service providing and method in a mobile communication system, and more particularly to a method for providing a broadcast service in a mobile communication system.

In general, a mobile communication system has been developed to provide a voice service, and a mobile communication system capable of transmitting data has been developed. As described above, the mobile communication system capable of data transmission is based on the code division multiple access (CDMA) method, and the data service is provided from the IS-95 system. In such a system, it has evolved from delivering short messages at the beginning to staying at providing a small data service such as Internet service. However, the 1x EV-DO (Evolution Data Only) service, which is in the commercial stage of providing commercial services, enables more various types of data services and faster data transmission. In addition, the standardization of the 1x EV-DV (Evolution Data and Voice) system is in progress as a more advanced service concept, and methods for providing more data services and voice services in the 1x EV-DV system are proposed. have.

Most of the services that are standardized in the above systems are based on 1: 1 services. In other words, when providing a service for a specific user in the network, a path unique to the mobile terminal is established, and the path is provided by assigning only the corresponding user. That is, not only the base station but also the upper network of the base station designates an address, such as a telephone number of a specific user, to transmit or receive data through a unique path assigned only to the corresponding user. Therefore, in the current system, the service is configured in a unicast manner.

However, if a plurality of users requests a service that does not require security for the same user, there is a problem in that resources of the system are wasted if separate resources are allocated and provided to each user. For example, when a mobile terminal is provided with a service such as TV broadcasting through a mobile communication system, if a mobile resource channel is allocated to each mobile terminal, it is difficult to provide another service. This causes the same problem in terms of network. That is, since the same TV broadcast service must be allocated to different wired resources for each user, the load of the system increases.

Therefore, as described above, when providing a plurality of users with a specific service that does not require security for each user or is connected to a specific group and does not require security within the group, the method is different from the methods currently provided. You need to provide a service. In other words, it should be possible to provide services to multiple users while saving system resources. This is because a system operator can reduce costs, and a user who is provided with a service can receive a cheaper service. Therefore, a broadcast service is required to simultaneously provide services to users who want service for a specific service that does not require security for each user or is connected to a specific group and security is not required within the group.

In order to provide a service as described above, negotiations on 1x EV-DV standardization are being made. However, the above services are provided to all users the same service. Therefore, the service cannot be performed by authenticating, providing a service, and charging a specific user only. This is because the same service must be provided to multiple users. However, as proposed in the present system or the present 1x EV-DV standard, the above service cannot be provided. This is because services to date have all been based on a single transmission scheme.

Therefore, the broadcast service can be authenticated to a plurality of users, can provide a service according to the authentication, and a method for performing billing according to the provided service is required. In this case, even if the location of the mobile terminal is changed, the service should be provided regardless of the location. Since this is the most basic aspect of the mobile communication system, the service must be maintained continuously when the user requests it.

Accordingly, an object of the present invention is to provide a method for providing the same broadcast service to a plurality of users in a mobile communication system.

Another object of the present invention is to provide a method for preventing waste of system resources when providing the same broadcast service to a plurality of users in a mobile communication system.

Another object of the present invention is to provide a method for performing authentication and service provision and user-specific charging when providing the same broadcast service to multiple users in a mobile communication system.

Another object of the present invention is to provide a method for continuously providing a service regardless of user's movement when providing the same broadcast service to a plurality of users in a mobile communication system.

Still another object of the present invention is to provide a method for maintaining accurate user information and performing accurate user-specific charging even when a mobile communication system provides the same broadcast service to multiple users.

The method of the present invention for achieving the above objects has two or more packet data service nodes, the packet data service nodes are included in the same broadcast system group and each packet data service node is different from a content server providing a broadcast service. A method for providing a broadcast service to a mobile terminal in a mobile communication system that provides a broadcast service and is connected to one packet control unit, wherein the first packet data service node broadcasts from the mobile terminal while providing a broadcast service to a predetermined mobile terminal. When the change of the service type is requested, the packet controller determines a second packet data service node to provide a broadcast service using the identifier of the broadcast service to be changed by using the requested broadcast identifier, and the packet controller determines the second packet data service node. 1packet data service node and Acquiring authentication and charging information of the mobile terminal from the first packet data service node and providing the second packet data service node to the second packet data service node when the second packet data service node is not the same; And the second packet data service node receiving a broadcast service requested from the mobile terminal from a content server and providing the broadcast service to the mobile terminal.

A method according to a second embodiment of the present invention for achieving the above objects, has at least two packet data service nodes and a packet control unit, the packet data service nodes are included in different broadcast system groups, the packet control unit at least A method for providing a broadcast service to a mobile terminal in a mobile communication system connected to one or more packet data service nodes, wherein each packet data service node receives a broadcast service from a content server providing a broadcast service and provides the broadcast service to the mobile terminal. The mobile terminal performs the idle handoff while receiving a broadcast service from a first packet data service node connected to a first packet controller to generate an initiation message upon receiving a broadcast service system identifier different from information received from the broadcast service. Transfer to the second packet controller Setting a traffic channel by using the second packet controller; and setting a third packet data service node and an end protocol using the temporary terminal of the mobile terminal through the second packet controller, and releasing the broadcast channel to release a broadcast service. Transmitting a request registration message to the second packet controller; and, when receiving a registration message from the mobile terminal, the second packet controller from the third packet data service node by using the temporary terminal of the mobile terminal. Acquiring authentication and charging information for a broadcast service; and generating, by the second packet controller, a broadcast service request message to a third packet data service node to provide a broadcast service according to a broadcast service identifier requested by the mobile terminal. Transmitting and setting a path to the mobile terminal; The data service node may include receiving a broadcast service requested from the mobile terminal from a content server and providing the broadcast service to the mobile terminal.

1 is a block diagram of a mobile communication system for providing a broadcast service according to the present invention;

2 is a configuration diagram of a system showing only components necessary for explaining a case where another broadcast service is requested while receiving an initial broadcast service according to an embodiment of the present invention;

3 is a signal flow diagram when a broadcast service is changed and a packet data service node providing a broadcast service is changed as in the embodiment of FIG. 2;

4 is a configuration diagram of a system showing only components necessary to describe a case where a broadcast packet data service node is changed when the location of a mobile terminal is changed according to another embodiment of the present invention;

FIG. 5 is a signal flow diagram for providing a broadcast service when a user moves a packet controller to an area of another packet data service node according to another embodiment of the present invention. FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings.

In addition, in the following description, there are many specific details such as specific messages or signals, which are provided to aid the overall understanding of the present invention, and it is understood that the present invention may be practiced without these specific details. It will be self-evident to those of ordinary knowledge. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a block diagram of a mobile communication system for providing a broadcast service according to the present invention. Hereinafter, each component constituting the mobile communication system and its function will be described in detail with reference to FIG. 1.

First, the configuration of FIG. 1 will be described. The mobile station (MS) 101 is a terminal that can receive a packet data service through a wireless channel, and can also receive a broadcast service provided through a wireless channel. The base stations (BTSs) 103a, ..., 103b, 104a, ..., 104b provide a broadcast service through a forward broadcast service channel (F-BSCH) and at the same time a "broadcast service parameter message" (BSPM: Broadcast Service Parameter Message) is transmitted to the mobile terminal through a wireless channel. The base stations 103a,... 103b, 104a,..., 104b may be connected to the base station controllers 105a, 105b, respectively, to provide a packet data service. The base station controllers 105a and 105b are connected to packet control functions (PCFs) 107a and 107b. The packet controllers 107a and 107b are connected to a packet data service node 109.

Although one packet data service node 109 is illustrated in FIG. 1, two or more packet data service nodes may be provided in one system, and another packet data service node may exist. This example will be described in more detail with reference to the accompanying drawings. In addition, the packet data service node 109 is connected to an authentication (Accounting and Authorization) system 111 for authentication of a mobile terminal. The packet data service node 109 is connected to a content server (CS) 113 providing a broadcast service. The authentication system 111 and the content server 113 are connected to a Broadcast Multi-Cast Service Controller (BCMCS Controller) 115.

Referring to the operation of each device according to the above configuration is as follows. First, the mobile terminal 101 may receive a packet data service through a wireless channel, convert the broadcast call request and data to be transmitted into packet data, and transmit the packet data service to the base station through the wireless channel. In addition, in the present invention, when the mobile terminal receives the broadcast service, the mobile terminal maintains the broadcast service by transmitting a registration message every predetermined period. This performs the same operation even when called. In addition, when generating a registration message, the mobile terminal 101 transmits the mobile terminal 101 including an interim (IMSI: International Mobile Subscriber Identity) which is a mobile phone number system of the mobile terminal. In addition, the mobile terminal 101 may use an end point protocol (PPP), and may perform operations required for authentication with the packet data service node 109 using the end point protocol. In addition, the mobile terminal 101 generates a registration message every predetermined time and delivers the registration message to the packet control unit or packet data service node of the system. When the broadcast service is encrypted and received, the mobile terminal 101 decrypts the encrypted data using the encryption key received after the registration message is transmitted and provides the same to the user.

The base stations 103a, ..., 103b, 104a, ..., 104b up-convert the packet data to be transmitted to a predetermined band for transmission of a packet data service with the mobile terminal and transmit the converted data over the air. The base stations 103a, ..., 103b, 104a, ..., 104b also down-convert the packet data received on the air from the mobile terminal and provide it to the base station controllers 105a, 105b. When the base station controllers 105a and 105b receive a registration message received from the mobile station from the base station, the base station controllers 105a and 105b generate an IOS (Inter Operability System) message including the reception time (Time_Stamp) information in the registration message and deliver the message to the packet controller. do. At this time, if the registration message received from the base station is a message for the mobile terminal requesting a broadcast service, the identifier (BCMCS_ID) of the requested broadcast service and the temporary number, which is the phone number of the mobile terminal, are delivered together to the packet controller. The IOS message becomes a message for broadcast service request.

The packet controllers 107a and 107b select a packet data service node when a broadcast service or a specific packet data service is requested from the mobile terminal. In general, a packet data service node includes a plurality of packet data service nodes in one system. For example, when one packet data service node system is configured with three packet data service nodes, the packet controllers 107a and 107b select one packet data service node among three packet data service nodes to service the mobile terminal. Will be required. As such, the reason why the packet controllers 107a and 107b select the packet data service node is to consider load balancing. That is, this is a method for preventing the load from being concentrated on a specific packet data service node.

In addition, the packet controllers 107a and 107b determine a packet data service node to provide a broadcast service by using an identifier of the broadcast service. Therefore, a packet data service node selected by using a temporary mobile terminal for a specific mobile terminal and a packet data service node according to a broadcast service requested by the mobile terminal may be different from each other. In addition, the packet controllers 107a and 107b may select the packet data service node to manage the information of the mobile terminal because a broadcast service is required, and thus the packet data service node corresponding to the temporary number of the mobile terminal and the information of the reception time through an IOS message. To pass. In addition, when the packet data service node providing the broadcast service is selected, the packet controllers 107a and 107b transmit the IOS message including the identifier of the requested broadcast service to the packet data service node to request the broadcast service. The packet controllers 107a and 107b inform the base station controller that the bearer path setup is completed when the response signal is received for the IOS message requesting the broadcast service so that the broadcast service can be provided.

As described above, the packet data service node 109 is illustrated as one in FIG. 1, but may be configured as a plurality of packet data service nodes in one system. In the drawings of the present invention to be described later, the packet controllers will show a plurality of packet data service nodes, which will be described. The packet data service nodes request broadcast service authentication to the home authentication system 111 of the mobile terminal for authentication upon receiving an IOS message of the mobile terminal from the packet controller, and receive and manage profile information of the corresponding user. . The packet data service node receives the user's profile information in this way and manages the profile for the user's mobile terminal for a preset time. At this time, if there is a service request from the mobile terminal, the packet data service node updates and manages the set time again. And when there is no more service request from the mobile terminal, the charging information is generated according to the profiles for the mobile terminal.

Next, the process of generating charging information in the packet data service node will be described. The packet data service node receives and stores reception time (stamp_stamp) information generated by the base station controller when an initial broadcast service is requested. And while the user's authentication is completed and the service is running, the user's profile is continuously stored and managed. In this case, the mobile terminal periodically generates a registration message and delivers the registration message to the base station controller when the service is to be maintained continuously. Then, the packet data service node managing the user's information is transmitted from the packet controller to the same packet data service node according to the method of selecting the packet data node, where the reception time information is included. Therefore, charging for the broadcast service may be performed based on the reception time. In addition to billing, a broadcast service is provided to a mobile terminal from a specific packet data service node.

Next, in the case of a packet data service node in which a broadcast service is provided, a bearer path is established between the base station controller and the packet data service node when there is a request for the packet data service. In addition, the packet data service node or the packet controller generates an encryption key that can be used by the terminal receiving the broadcasting service while receiving the broadcasting service, and transmits the encryption key to the mobile terminal through the base station controller. Such an encryption key generally has a key value different from that provided by the content server 113 and may be configured as a short key. Therefore, it is preferable to take the use time of the encryption key relatively short, and the mobile terminal should deliver the registration message within a time shorter than the use time of the encryption key. Accordingly, the packet data service node or the packet controller managing the profile of the user may provide a new encryption key to the mobile terminal whenever a registration message is received.

In addition, the packet data service node may determine a packet data service node to provide a broadcast service. As described above, the method for determining a packet data service node for providing a broadcast service selects the packet data service node using a broadcast service identifier in the same manner as the method performed by the packet controller.

The Broadcast Multi-Cast Service Controller (BCMCS Controller) 115 transmits session information (IP multicast address, port number, encryption key, broadcast service identifier, etc.) of the broadcast service to the packet data service node 109 and the contents. Transfer to server 113. Through this, an encryption key or the like can be provided to the mobile terminal, and a broadcast service can be provided.

The content server 113 is a device that substantially provides a broadcast service. Therefore, it stores a specific broadcast service and delivers it to the requested packet data service node when a broadcast service is requested. In addition, the content server 113 generates an encryption key and provides it to the packet data service node when encryption is provided at the application layer.

When the authentication of the specific mobile terminal is required from the packet data service node, the authentication server 111 performs authentication, and transmits the profile information of the mobile terminal to the packet data service node 109 together with the authentication result. Thereafter, when charging information is received from the packet data service node 109, charging processing is integrated using the received charging information. Therefore, in the present invention, when charging information is received from a packet data service node providing a broadcast service or from a packet data service node managing a profile of a mobile terminal, charging is performed using the charging information.

FIG. 2 is a configuration diagram illustrating a system showing only components necessary for describing a case where another broadcast service is requested while receiving an initial broadcast service according to an embodiment of the present invention. Hereinafter, with reference to FIG. 2, an operation performed in each component when a change in broadcast service is required according to the present invention will be described in detail.

2 are identical to those described in FIG. 1 except that the packet data service node is configured with different identifiers. That is, the packet data service node 109a and the packet data service node 109b are packet data service nodes that provide different broadcast services. In the following description, it is assumed that the packet data service nodes 109a and 109b are the first packet data service node 109a and the second packet data service node 109b, and the first packet data service node 109a is broadcast. It is assumed that a packet data service node providing an identifier 1 (BCMCS_ID 1) and a second packet data service node 109b provides a broadcast identifier 2 (BCMCS_ID 2). In addition, according to an embodiment of the present invention, a case in which the mobile terminal 101 requests the service of the broadcast service identifier 2 while receiving the service of the broadcast identifier 1 through the first packet data service node 109a will be described.

The first packet data service node 109a is providing a service of the broadcast service identifier 1 to the mobile terminal 101 through the packet controller 107, the base station controller 105, and the base station 103a. In this case, when the mobile terminal 101 requests the second broadcast service, the base station controller 105 determines the packet data service node to provide the broadcast service using the broadcast service identifier according to the new broadcast service request. If the packet data service node determined as described above is the second packet data service node 109b, processing thereof should be performed. In this case, it is assumed that the content server 113 providing the broadcast service is the same.

In this case, the user profile information related to the broadcast service stored in the first packet data service node 109a which previously provided the broadcast service should be delivered to the second packet data service node 109b which will provide the new broadcast service. Accordingly, the packet controller 107 receives information related to a broadcast service from the first packet data service node 109a and receives charging information according to a broadcast service provided up to now. Thereafter, the packet controller 107 sets the channel and the bearer path so that the packet controller 107 may transmit the same to the second packet data service node 109b to perform a new broadcast service.

3 is a signal flowchart when a broadcast service is changed and a packet data service node providing a broadcast service is changed as in the embodiment of FIG. 2. Hereinafter, a signal flow when a broadcast service is changed and a packet data service node which provides a broadcast service is changed in detail with reference to FIGS. 2 and 3. In FIG. 3, the base station and the base station controller are referred to as a base station (BS), and reference numerals will be described using 105.

In addition, in the embodiment of FIG. 3, when a user listens to a broadcast service in a state in which the user stops listening to the broadcast after listening to the previous broadcast as well as switching the broadcast service while continuously watching the broadcast, the user selects a broadcast service different from the previous broadcast service. If it does, it is true for all.

In step 301, the mobile terminal 101 receives a broadcast service parameter message (BSPM). In this case, when the first broadcast service is requested by the user's request, the mobile terminal 101 transmits a registration message (Registration) including the broadcast service identifier to the base station (BS) 105 in step 303. Generated and transmitted periodically or aperiodically. Then, in step 305 and 307 between the base station 105 and the first packet data service 109a, a process for broadcast packet data service is performed, and in step 309, a broadcast service is provided from the first packet data service node 109a. . As such, when the broadcast service is being provided or the broadcast service is stopped, the user may request a new broadcast service that is different from the previously received broadcast service. Reference numeral 311 is for explaining this case. If the user requests a new broadcast service in step 311, the mobile terminal 101 proceeds to step 313 and generates a registration message including an identifier of the previous broadcast service and a new broadcast service identifier and transmits it to the base station 105. In this case, the message transmitted may be illustrated in Table 1 below.

Field Length (bits) … NUM_BCMCS_SESSION 0 or 6 NUM_BCMCS_SESSION occurrences of the following variablelength record: BCMCS_ID 32 DE_REG_IND One PREV_BCMCS_SESSION_INCLUDED 0 or 1 NUM_PREV_BCMCS_SESSION 0 or 6 NUM_PREV_BCMCS_SESSION occurrences of the following variablelength record: PREV_BCMCS_ID 32

Fields added in Table 1 are the last four fields. The first field (PREV_BCMCS_SESSION_INCLUDED) of the last four fields is a field indicating whether or not to include the following field, the second field (NUM_PREV_BCMCS_SESSION) is to inform the information according to the session configuration of the previous broadcast service. Below that, information about the session according to the previous broadcast service is included, and finally, the previous broadcast service identifier is included. In this case, the previous broadcast service identifier may not necessarily need to be transmitted. On the other hand, it is not necessary to establish a new session through the above information, and it is possible to transfer the previously set information to the packet data service node providing the new broadcast service.

Upon receiving the registration message as described above, the base station 105 generates an IOS message including the received broadcast service identifiers and reception time (Time_Stamp) information, and transmits the received IOS message to the packet controller 107. Then, the packet controller 107 needs to move the user profile from the first packet data service node 109a that provided the previous broadcast service to the second packet data service node 109b that provides the new broadcast service according to the new broadcast service request. . The reason for moving the user's profile is that the packet controller can easily find the packet data service node with the user authentication / billing information, and also manages the resources of the mobile network by integrating and managing the authentication / billing information of the user who listens to the broadcasting service. Because you can save.

Upon receiving the IOS message, the packet controller 107 checks whether the two broadcast service identifiers received in step 317 should be provided with the broadcast service from different packet data service nodes. As a result of the checking of step 317, if the two values are different and the packet data service node for broadcasting is different, the following flow is performed. Although the two values are different, if the packet data service nodes providing the broadcast packet data service are the same, only the service needs to be changed without performing the following process, and thus this will not be described in detail.

As described above, when the packet data service node to which the broadcast service is newly provided is changed, the process proceeds to step 319 to select the first packet data service node 109a previously providing the broadcast using the previous broadcast service identifier. In operation 321, the packet controller 107 delivers an IOS message including a reception time and a broadcast service identifier. At this time, the message transmitted includes a billing information for providing a broadcast service and authentication information of the corresponding user. Upon receiving the IOS message, the first packet data service node 109a generates an IOS response message including authorization & accounting (A & A) information of the user in step 323 and transmits it to the packet controller 107. do.

In operation 325, the packet controller 107 selects the second packet data service node 109b according to the newly requested broadcast service identifier. In step 327, the controller 107 transmits the authentication and information of the corresponding user, received in step 323, to the second packet data service node 109b that will provide a new broadcast service. At this time, the reception time information and the broadcast service identifier 2 are included and transmitted together.

In operation 329, the second packet data service node 109b stores the authentication information and the charging information of the mobile terminal received in step 327, and prepares to provide a broadcast service according to the information of the corresponding broadcast service. . In operation 331, the second packet data service node 109b generates a reply message to the IOS message and transmits the generated reply message to the packet controller 107. The bearer path between the second packet data service node 109b and the packet controller 107 is established according to the response message. In step 333, the packet controller 107 generates a reply of the IOS message to the base station 105 and transmits a reply to the bearer path between the base station and the packet controller 107. Then, the broadcast service is provided from the second packet data service node 109b providing the new broadcast service requested by the mobile terminal 101 to the mobile terminal 101 in step 335. In this way, the packet data service node providing the broadcast service can manage profile information of the corresponding mobile terminal consistently.

FIG. 4 is a configuration diagram illustrating a system showing only components necessary for describing a case in which a packet data service node for broadcasting is changed when a location of a mobile terminal is changed according to another embodiment of the present invention. Hereinafter, an operation performed in each component when changing a packet data service node that provides a broadcast service according to a change in the location of the mobile terminal will be described in detail with reference to FIG. 4.

4 is the same as FIG. 1 and FIG. 2 described above, and in contrast to FIG. 1, there is only a difference that three packet data service nodes are configured. That is, in the configuration as shown in FIG. 4, the mobile terminal 101 moves from the base stations 103a, ..., 103b of the last stage connected to the first packet data service node 109a, and the other packet data service nodes 109b, This is to explain the case of moving to the base stations 104a, ..., 104b connected to 109c. The first packet data service node 109a becomes a packet data service node providing an initial broadcast service, and the second packet data service node 109b is connected to another packet controller 107b, and the first packet data service node A packet data service node that provides a broadcast service different from 109a. The third packet data service node 109c is a packet data service node that manages an overall profile of the mobile terminal 101.

5 is a signal flow diagram for providing a broadcast service when a user moves a packet controller to an area of another packet data service node according to another embodiment of the present invention. Hereinafter, a signal flow when providing a broadcast service according to a user's movement will be described in detail with reference to FIGS. 4 and 5.

In operation 501, the first packet controller (source PCF) 107a generates a broadcast system parameter (BSPM) message and provides it to the mobile terminals. In this case, the broadcast system service parameters according to the present invention may be shown in Table 2 below.

Field Length (bits) … NUM_BCMCS_SESSION 6 … NUM_BCMCS_SESSION occurrences of the following variable lengthrecord: BCMCS_ID 32 BCMCS_GROUP_INDICATOR N …

In Table 2, a broadcast service group indicator (BCMCS_GROUP_INDICATOR) should be included for each BCMCS_ID. In general, N may be 8 bits, but a smaller or larger value may be used. Accordingly, the mobile terminal 101 stores the broadcast service group indicator according to the message in step 503. Thereafter, the mobile terminal 101 generates a registration message including an identifier for requesting a broadcast service and transmits the registration message to the first packet controller 107a in step 505. The mobile terminal 101 transmits a registration message periodically or aperiodically to the base station to register the location of the mobile terminal. In addition, the broadcast channel indicator (BCMCS_ID) is transmitted to the base station in the registration message to inform the currently received broadcast channel. Accordingly, the first packet controller 107a performs a procedure for providing a broadcast service in step 507, and stores authentication and billing information of the mobile terminal 101 in step 509. In operation 511, the first packet data service node 109a provides the packet data service requested by the mobile terminal 101.

In step 513, the mobile terminal 101 that received the broadcast service performs idle handoff to the area of the packet control unit in which the broadcast service group is different. After the mobile terminal performs the idle handoff, the mobile terminal 101 may receive a broadcast system parameter message from the second packet controller 107b in step 515. When the broadcast system parameter message is received in step 515, the mobile terminal 101 stores the message in step 517. When the received broadcast system parameter is compared with the previously received broadcast service parameter, the mobile terminal 101 generates an origination message (ORM) having a service option number (SOM). In step S2, the second packet controller 107b is transferred. The reason for generating and transmitting the initiation message as described above is because it is impossible to connect to the broadcast packet data service node that stores the authentication and billing information of the user in the cell where the mobile terminal is currently located.

As described above, after generating and transmitting a start message in step 519, a traffic channel between the mobile terminal 101 and the second packet controller 107b is set in step 521. Thereafter, the mobile terminal 101 newly establishes a PPP connection with the third packet data service 109c for managing subscriber information. When performing this process, the subscriber information management packet data service node after the third packet data service node 109c receives a user profile and user authentication / billing information after authentication from the authentication server. Accordingly, the PPP connection between the mobile terminal 101 and the second packet data service node 109c is successfully established.

If the PPP connection is successfully completed, the mobile terminal 101 proceeds to step 525 to terminate the connected traffic channel. In operation 527, the mobile terminal 101 generates a registration message including a broadcast service identifier requested by the user, and transmits the registration message to the second packet controller 107b. In operation 529, the second packet controller 109b determines the third packet data service node 109c to manage the user profile as a whole by using the IMSI received from the mobile terminal 101. Thereafter, the second packet controller 109b generates an IOS message including the reception time of the registration message and the broadcast service identifier to the packet data service node determined in step 529 and transmits the IOS message to the third packet data service node 109c.

In operation 533, the third packet data service node 109c generates an IOS reply message according to the received IOS message, and delivers it to the second packet controller 107b. At this time, the IOS response message includes the authentication and billing information according to the broadcast service of the mobile terminal. Thereafter, the third packet data service node 109c may terminate the PPP configuration established with the user and immediately terminate the R-P connection. If necessary, it can also be configured to terminate at a later point in time.

When the second packet controller 107b receives a profile for authentication and charging information of the mobile terminal 101, the second packet controller 107b proceeds to step 537 to provide packet data for providing a broadcast service according to the broadcast service identifier requested by the mobile terminal 101. Determine the service node. In this case, if the packet data service node is the same, the PPP configuration in step 535 does not need to be canceled, and the packet data service node managing the overall profile of the user and the packet data service node providing the broadcast service are the same. However, if the packet data service node for providing a broadcast service is different from the packet data service node for managing the user's profile as a whole, it is necessary to perform the same operation as in the present invention for profile management and billing processing to prevent waste of resources. The packet controller can easily find the profile of the mobile terminal.

The second packet controller 107b is configured to include an IOS including a broadcast service identifier, authentication information received in step 533 and a reception time of a registration message when the packet data service node for providing a broadcast service is not the third packet data service node. A message is generated and delivered to the second packet data service node 109b. Then, the second packet data service node 109b stores the message received in step 539, generates an IOS reply message for the received IOS message in step 541, and delivers the message to the second packet controller 107b. . Then, although not shown in the figure, the second packet controller 107b generates an IOS response message and delivers it to the base station to establish a bearer path.

In this manner, when the bearer path is established, the second packet data service node 109b may be allocated to the mobile terminal and the broadcast service channel, and thus the process may proceed to step 543 to provide a broadcast traffic service.

As described above, when a broadcast service is provided by providing a system, even when a broadcast service is changed or when a broadcast service is to be provided from another system in response to a change in the location of the mobile terminal, information of the mobile terminal can be managed consistently. There is an advantage.

Claims (6)

Having two or more packet data service nodes, the packet data service nodes are included in the same broadcast system group, and each packet data service node is connected to one packet controller and provides different broadcast services from a content server providing a broadcast service. In the method for providing a broadcast service to a mobile terminal in a mobile communication system, When a first packet data service node is requested to change the type of a broadcast service from the mobile terminal while providing a broadcast service to a predetermined mobile terminal, the packet controller broadcasts using the identifier of the broadcast service to be changed using the requested broadcast identifier. Determining a second packet data service node to provide a service; The packet controller obtains authentication and billing information of the mobile terminal from the first packet data service node when the first packet data service node and the second packet data service node are not identical to each other. Providing a route and setting a route for a broadcast service; And wherein the second packet data service node receives a broadcast service requested from the mobile terminal from a content server and provides the broadcast service to the mobile terminal. The method of claim 1, wherein the packet control unit, And when the first packet data service node acquires the authentication and charging information of the mobile terminal, providing charging time information of a registration message to perform charging processing for the broadcast service provided to date. Broadcast service providing method. The method of claim 1, wherein the packet control unit, And transmitting a broadcast service identifier required for providing authentication and charging information to the second packet data service node. At least two packet data service nodes and a packet control unit, wherein the packet data service nodes are included in different broadcast system groups, the packet control unit is connected to at least one packet data service node, and each packet data service node is a broadcast service. In the method for providing a broadcast service to a mobile terminal in a mobile communication system for receiving a broadcast service from a content server providing a to a mobile terminal, The mobile terminal performs the idle handoff while receiving a broadcast service from a first packet data service node connected to a first packet controller to generate an initiation message upon receiving a broadcast service system identifier different from the information received from the broadcast service. 2 setting the traffic channel by transmitting to the packet controller; The mobile terminal establishes a terminating protocol with a third packet data service node using the temporary of the mobile terminal through the second packet controller, releases the traffic channel, and sends a registration message requesting a broadcast service to the second packet. Transmitting to the control unit; Obtaining, by the second packet controller, authentication and charging information for a broadcast service of the mobile terminal from the third packet data service node using a temporary of the mobile terminal when receiving a registration message from the mobile terminal; Generating, by the second packet controller, a broadcast service request message to a third packet data service node to provide a broadcast service according to the broadcast service identifier requested by the mobile terminal, and setting a path to the mobile terminal; And the third packet data service node receives a broadcast service requested from the mobile terminal from a content server and provides the broadcast service to the mobile terminal. The method of claim 4, wherein the third packet data service node, And terminating a termination protocol when the second packet data service node and the third packet data service node are different from each other. The method of claim 4, wherein the second packet control unit, And transmitting authentication and charging information when a broadcast service request is made to the second packet data service node.