KR100658567B1 - Method for providing contents of multimedia broadcast multicast service - Google Patents

Abstract

A method for providing contents of an MBMS is provided to perform scheduling of events, such a service session start time, a contents acquisition time, and a contents transmission start time, by BM-SC control software, thereby differently supporting contents providing methods according to each service. A method for providing contents of an MBMS(Multimedia Broadcast/Multicast Service) comprises the following steps. A BM-SC(Broadcast/Multicast-Service Center)(400) sets various time information and operation information for the MBMS and obtains corresponding contents for the MBMS from a CP/MB source(Contents Provider/Multicast Broadcast source server)(S310). The BM-SC establishes a service session with a UE(User Equipment)(100) to set-up wireless bearer for transmitting the corresponding contents(S321), transmits the contents by broadcasting/multicasting the corresponding contents to plural UEs(100) through a mobile communication network(S324), and cancels the service session to release a pre-assigned wireless bearer when the contents transmission for a corresponding MBMS is completed(S326).

Description

Method for providing contents of multimedia broadcast multicast service {Method for providing contents of Multimedia Broadcast Multicast Service}

1 is a configuration diagram of a WCDMA system for providing an MBMS service based on a 3GPP mobile communication network.

2 is a flowchart illustrating a process of setting various time information for processing a service when registering an MBMS service in a BM-SC according to an embodiment of the present invention.

3 is a flowchart illustrating a content download process started by an external MB source server in a BM-SC according to an embodiment of the present invention.

4 is a flowchart illustrating a process in which a BM-SC requests and downloads a content to an external MB source server at a service start time according to an embodiment of the present invention.

5 is a flowchart illustrating a process in which a BM-SC delivers MBMS service content using an external content provider according to an embodiment of the present invention.

The present invention relates to a method for providing contents of a multimedia broadcasting multicast service (MBMS), and more particularly, to a method for providing contents of a multimedia broadcasting multicast service for providing various types of services in a mobile communication network.

Multimedia Broadcast / Multicast Service (hereinafter referred to as MBMS) is a point-to-multipoint service that is being standardized by the 3rd Generation Partnership Project (3GPP). A service support technology for efficiently using radio resources and network resources to deliver content information to a plurality of user terminals.

In the MBMS service, multimedia data is broadcast / multicasted from a data source through a mobile communication network and transmitted to a plurality of user terminals. This type of point-to-multipoint service can save network resources because it can deliver the same service to multiple user terminals in a single transmission. MBMS services are mainly used in wireless communication network systems such as wideband code division multiple access (W-CDMA), European mobile telephone (GSM) networks, and the like. MBMS data transmission basically includes a content transmission step from a data source, a service control network transmission step, a wireless network transmission step for supporting an area where a user terminal exists, and a reception step of the user terminal.

However, in a method in which a broadcast multicast service center (BM-SC), which is a control node, delivers content for an arbitrary MBMS service to a terminal, the content type, change period, and provision according to characteristics of the MBMS service are provided. There are various methods, and this characteristic can be classified into a case where it is efficient to manage internal CP contents by the BM-SC itself and a case where an structure using an external CP is efficient. Therefore, the BM-SC, which is a control node of the MBMS service, has not been presented with a method for accommodating all of these types of content providing methods, and has not provided an optional procedure for this online.

In order to solve such a problem, the present invention provides a case in which a BM-SC controlling an MBMS service in a mobile communication network (WCDMA network) specifies what type of content to provide for each service and stores and manages internal CP content by itself. In addition, when the content is delivered to the user terminal by interworking with an external CP / MB source server and the BM-SC simply provides a content delivery path and uses an external CP having its own function to control delivery of the actual content simultaneously, Provided is a method for providing contents of a multimedia broadcasting multicast service, which provides an MBMS service required by a terminal.

In order to achieve the above technical problem, the method for providing contents of a multimedia broadcasting multicast service (MBMS) according to the characteristics of the present invention includes a plurality of Node Bs, a plurality of Radio Network Controllers (RNCs), UTRANs, and packets. A core network (CN) consisting of a plurality of GGSNs connected to a plurality of SGSNs providing a service, and a broadcast type multicast service control node (BM-SC) interworking with the GGSN to control a multimedia broadcasting multicast service (MBMS) service. A method for providing contents of a multimedia broadcasting multicast service (MBMS) in a mobile communication network including:

(a) setting, by the BM-SC, various time information and operation information for an MBMS service; (b) obtaining corresponding content for MBMS service from an external content provider / multicast broadcast source server (CP / MB source); (c) establishing a service session with a user terminal for radio bearer setup to deliver the corresponding content; (d) the BM-SC delivering contents by broadcasting / multicasting the contents by a content delivery module to a plurality of user terminals through a mobile communication network; And (e) releasing the service session for releasing the pre-allocated radio bearer when content delivery for the MBMS service is completed.

In addition, the method for providing contents of the multimedia broadcasting multicast service (MBMS) according to an aspect of the present invention includes a plurality of Node Bs, a plurality of UTRANs configured with a plurality of Radio Network Controllers (RNCs), and a plurality of packet services. A mobile communication network including a core network (CN) composed of a plurality of GGSNs connected to SGSNs of the network, and a broadcast type multicast service control node (BM-SC) linked to the GGSN to control a multimedia broadcasting multicast service (MBMS) service. As a method for providing contents of a multimedia broadcasting multicast service (MBMS) in

(a) setting various time information and operation information for MBMS service in the BM-SC; (b) when the MBMS service session establishment start time arrives, performing a session establishment procedure for delivering contents of the user terminal and the corresponding service through the mobile communication network; (c) transmitting a Contents Request message including a service ID and a session ID to an external CP at a content delivery time point; (d) when the external CP / MB source server arrives at the corresponding content delivery time point, the corresponding content is broadcasted / multicasted and transmitted to a plurality of user terminals through a distribution tree below GGSN through the BM-SC; ; (e) an external CP delivering a contents delivery complete message including a service ID and a session ID to the BM-SC; And (f) if the BM-SC receives the content delivery completion message, performing a service session release procedure set for the corresponding service.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

In addition, when a part is said to "include" a certain component, it means that it may further include other components, without excluding other components unless otherwise stated.

In addition, the term module described herein refers to a unit for processing a specific function or operation, which may be implemented in hardware or software, or a combination of hardware and software.

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

1 is a configuration diagram of a WCDMA system for providing an MBMS service based on a 3GPP mobile communication network. The MBMS service has a service area (SA) to which each service can be applied, which is called a broadcast and multicast service area (SA) 700 for each service type. The service areas to which the MBMS service is to be applied are cell area unit, one Node B area unit, RNC (Radio Network Controller) jurisdiction unit, SGSN (Serving General Packet Radio Service (GPRS) Support Node) unit, GGSN (Gateway GPRS Support Node) It may have various sizes, such as a unit of area, and different service areas (SAs) may overlap each other.

In the case of a multicast service, each of the service areas (SAs) 701 ˜ 703 may provide different MBMS services, and may exist in the corresponding service area (SA) 700 and register to receive MBMS services. Only user equipment (UE) 101, 102 receives the service.

However, in the case of a broadcast service, all user terminals existing in the corresponding service area can be received. However, this is possible only when the corresponding UE is designated to receive a broadcast channel.

The user terminal (UE) is a Join message based on Internet Group Management Protocol (IGMP) for IPv4 system and Multicast Listener Discovery (MLD) for IPv6 system to receive multicast service specified by a specific IP address. Will be sent.

The Join message is received at the GGSN in the 3GPP system, and the GGSN performs the UE Activation procedure to receive the BM-SC and MBMS service. In addition, if any user terminal terminates the MBMS service, the user terminal also sends an IGMP message or MLD Leave message to the GGSN as a UE Deactivation process, and the GGSN triggers the IGMP message or MLD Leave message. To perform UE Deactivation procedure with BM-SC. As such, after any user terminal is registered in the service, when the BM-SC starts the MBMS service by the scheduler of the service, the BM-SC receives broadcast content data.

However, in the case of a broadcast service, the user terminal receives the MBMS broadcast service without a separate service registration procedure. That is, the user terminal only needs to be configured to receive broadcast service. Then, the BM-SC starts the service according to the MBMS service start time managed by the system, which is a core network (CN) of the 3GPP network using the MBMS session establishment procedure started by the service scheduling itself in the BM-SC. Enable communication with the RNC and the UE, and perform a procedure for releasing a session established at the end of a corresponding service.

The W-CDMA network is a user terminal (UE) (101-105), UTRAN (Universal Mobile Telecommunications Network Terrestrial Radio Access Netwotk) (200) and core network (Core network) 300 and the node responsible for MBMS service control Content Provider / Multicast Broadcast Source Server that provides multimedia content to be delivered through a Broadcast Multicast Service Center (hereinafter referred to as BM-SC) 400 and MBMS service ; Hereinafter referred to as CP / MB source) (510a to 510n, 520).

The CP / MB sources 510a to 510n and 520 are present in the form of nodes that can communicate in the public Internet network 600.

The UTRAN 200 manages a plurality of Radio Network Controllers (hereinafter referred to as RNCs) 220a to 220n and a plurality of Node Bs 210a to 210n managed by the RNCs 220a to 220n. Include. The Node Bs 210a to 210n receive uplink signals transmitted from the UE 100 at a physical layer level, and transmit downlink signals to the UE 100.

 The Node Bs 210a to 210n serve to transmit and receive signals to / from the UE 100, thereby connecting the UE 100 to the UTRAN 200. It acts as an access point. The Node Bs 210a to 210n configure and communicate with a radio channel with the user terminals 100 existing in the cell by managing radio resources on a cell basis.

The radio network controller (RNC) 220a to 220n is in charge of allocating and managing radio resources and serves as an access point for connecting the Node Bs 210a to 210n to the CN 300.

The core network (CN) 300 may include one or more Serving General Packet Radio Service (SGSN) Support Nodes (SGSNs) 310, and one or more Gateway GPRS Support Nodes (GGSNs, below) ( 320).

The radio network controllers (RNC) 220a to 220n are connected to the SGSN 310 of the core network (CN) 300. The SGSN 310 is connected to the GGSN 320 to manage mobility of the mobile terminal, and selectively transmits data for MBMS-related services to a specific radio network controller (RNC).

The GGSN 320 performs a function of a gateway for interworking with the Internet or an external packet network. That is, the GGSN 320 serves as a connection point between the WCDMA system below the GGSN and the external Internet 600.

The BM-SC (BM-SC) 400, which is a node in charge of controlling the broadcast type multicast service, is an MBMS user as one functional element of the W-CDMA system for providing an MBMS service. Must exist for service, and it is the subject of management and control of MBMS service and provides functions for preparation of MBMS user service and delivery of service information.

The BM-SC 400 provides MBMS service subscriber and service information management, MBMS bearer service authorization, service initiation, and MBMS information transmission planning and delivery in the corresponding mobile communication network. The BM-SC 400 uses a packet delivery network of the WCDMA network to provide an MBMS service to the user terminal (UE) 100, which is connected to the GGSN 320. At this time, the interface between the BM-SC 400 and the GGSN 320 uses an IP interface used when the GGSN 320 is connected to the external Internet. The BM-SC 400 may serve as an entry point to content providers / multicast broadcast source servers 510a to 510n and 520 to deliver MBMS information. It can play the role of CP). In this case, the content provider (CP) means a node including an application function for content delivery.

The multicast broadcast source server (MB Source) is simply a node such as a storage or FTP server that stores only the content, and they are a user terminal (UE) 100 through a service application provided by the BM-SC 400 or another CP. Is delivered to.

Under these circumstances, after the UE 100 registers a request for receiving the MBMS service, the BM-SC 400 receives the service content when the BM-SC 400 starts delivering the corresponding service content according to the start time of a specific MBMS service. Done. These contents are passed through the GGSN 320, the SGSN 310, the RNCs 220a to 220n, and the Node Bs 210a to 210n via the common channel used in the corresponding service area SA. (UE) is passed to 100. At this time, the BM-SC 400 delivers the corresponding content to all the GGSNs 320 supporting the user terminals (UEs) 101 to 105 that want to receive the MBMS service.

The GGSN 320 is delivered to a plurality of SGSNs 310 supporting the corresponding UE 100, and the SGSN 310 is also delivered to a plurality of RNCs 220a to 220n, and the RNC ( 220a to 220n are delivered to the plurality of Node Bs 210a to 210n, and finally, Node Bs 210a to 210n are delivered to the UE 100 through a common channel used in the corresponding service area SA. do.

The MBMS service is a broadcast type multicast service, and content delivery is attempted according to a broadcast schedule for each service, and the corresponding UE is based on a distribution tree in which the above-described nodes are composed of links of subordinate nodes. ). Therefore, even if a user terminal (UE) 100 that wants to receive a certain MBMS service does not exist, the CP function in the BM-SC 400 or a separate node outside the BM-SC 400. Existing CPs 510a to 510n and 520 transmit content when the service start time comes. This causes data packet delivery to begin. These packets eventually flow down the stage before the BM-SC 400 forwards to the GGSN 320 along the MBMS packet delivery path, and the BM-SC 400 attempts to forward the GGSN 320 to the GGSN 320. If it determines that there is no valid GGSN in the corresponding distribution tree, then the transfer to that node is stopped.

2 is a flowchart illustrating a process of setting various time information for processing a service when registering an MBMS service in a BM-SC according to an embodiment of the present invention.

2 is a procedure illustrating a step in which the BM-SC 400 generates information necessary for interworking with various types of content providers (CPs) in an initial stage of service registration to be provided through an MBMS service.

The operator operating the BM-SC 400 plays a role of storing and managing various information for operating the BM-SC in order to provide an MBMS service. The BM-SC operator uses a separate operator terminal to store and manage information on the MBMS service and information on the user, and registers which service is used by which user. User information and service usage registration information may be input through a web server. Once an operator registers information on a service to be provided by the system (S210), the operator stores information about the service and information about a session constituting the MBMS service. For example, it stores service environment variables and operational information for providing a corresponding service, such as when and from what broadcast channel to broadcast what kind of content. In this case, the operator designates what type of information content is provided for the service and stores the information necessary for processing accordingly.

After inputting such data, the BM-SC 400 designates a time to start a session establishment procedure for the corresponding service by referring to the time when the actual MBMS service should be performed. The session establishment procedure is a step for establishing a radio bearer path, which is a traffic delivery path to a mobile terminal, and should be started with sufficient time for processing the actual content before delivery. In consideration of this, the BM-SC 400 determines and sets a time to start a session establishment procedure (S220).

The BM-SC 400 receives only content from an external MB source server for each service and provides service content by itself, and only the BM-SC 400 uses a content provider having a content delivery function. It is divided into a case of providing only a passing pass.

In the former case, the BM-SC 400 may acquire content from an external MB source server in two ways. The first method is a method of informing the BM-SC 400 when a content change occurs in an external MB source server and performing a separate procedure. The second method is a service provided by the BM-SC 400. This is a method of requesting and obtaining content at an appropriate time before starting. In this case, the BM-SC 400 provides a delivery path for content traffic sent from a content provider CP.

The BM-SC 400 determines whether to use an MB source server or a content provider (CP) to provide content (S225). When using the CP, the BM-SC 400 transitions to a service providing state without additional information allocation, and internally. When the content is obtained from the MB source server and the service content is provided by the BM-SC itself, information on the start time of actually delivering the corresponding content is designated (S230). In case of using an external MB source server, it is determined whether a content acquisition procedure is started by an MB source server and whether the BM-SC 400 uses a method of acquiring content for each session in connection with a session establishment procedure (S240). ). In this case, in the latter case, the BM-SC 400 should designate a content acquisition time for each session from an external MB source server (S250). Given the size of the content prepared for the MBMS service and the packet delivery capability with the MB source, the task must contain enough time before the actual service session is created.

In preparation for such a situation, the BM-SC operator stores the service information, which structure is used by each service, and inputs relevant information into the system according to the selection, and starts the service session in the BM-SC control software. And scheduling of events such as content acquisition time and content delivery start time to support different content providing methods for each service.

3 is a flowchart illustrating a content download process started by an external MB source server in a BM-SC according to an embodiment of the present invention.

Referring to FIG. 3, when the corresponding source server starts the content acquisition procedure while using the external MB source server 400, the external MB source servers 510a-n determine that a change to any content has occurred. (S311). The external MB source server 510a-n transmits a Contents Update Notification message regarding the fact of the change to the corresponding content to the BM-SC 400 (S312). At this time, the external MB source server (510a-n) is notified of the content change, including the service ID (Service ID), the session ID (Session ID) and the content file name (ContentsName) to which the changed content must be delivered to identify the content A Contents Update Notification message is delivered to the BM-SC 400.

When the BM-SC 400 receives the notification of the content change, the BM-SC 400 sends a Contents Request message including a service ID and a session ID to the external MB source server 510a-n to request a download of the corresponding content file. Transfer (S313). Thereafter, the content is downloaded from the external MB source server 510a-n to the BM-SC 400 (S314).

After the external MB source server 510a-n completes the delivery of the corresponding content, the external MB source server 510a-n sends a service ID, a session ID, and a content file name for the corresponding content file to the BM-SC 400. A Contents Download Complete message including the ContentsName is transmitted (S315).

The BM-SC 400 that receives the content replaces, stores and manages existing content stored in the BM-SC 400 with new content for each service (S316). This content acquisition process is started by the MB source server 510a-n whenever any content is changed and a download operation of the content is performed.

When the BM-SC 400 starts to establish a session for a random service (S320), it performs a service session establishment procedure for radio bearer setup to deliver corresponding content (S321). At this time, the start of the service session is processed based on the value set in step S220 of FIG. The service session establishment procedure is performed by the procedure specified in the standard 3GPP TS 26.346 to the GGSN 320, the SGSN 310, the RNC 220a-220n, and the UE 100 below the BM-SC 400.

Upon completion of the session establishment procedure, the BM-SC 400 determines whether the start of delivery of the corresponding content has arrived (S322), and drives the content delivery module for delivering the corresponding content to the terminal through the mobile communication network ( S323). The content delivery module creates a multicast packet according to a packet generation procedure suitable for the type of content and delivers the multicast packet to the GGSN 320 serving as an access point of the 3GPP system. The content packet transmitted to the GGSN 320 is delivered to the SGSN 310 and the radio network controller (RNC) 220a-220n by using a GTP tunnel, and the radio network controller (RNC) and the user terminal (UE). It is transmitted to the terminal through the radio bearer set between (100) (S324).

The content delivery module monitors the delivery of the corresponding content file and determines whether delivery is completed (S325). When the data transmission for the service is completed, the BM-SC 400 performs a service session release procedure for releasing a radio bearer that has already been allocated (S326). At this time, the 3GPP network releases the radio resources connected for the service delivery.

4 is a flowchart illustrating a process in which a BM-SC requests and downloads a content to an external MB source server at the start of a service according to an embodiment of the present invention. That is, it is a flowchart of a case where the BM-SC 400 starts a content acquisition procedure in accordance with a service start time using an external MB source server 510a-n.

The BM-SC 400 performs a content acquisition procedure in association with a point in time at which any service should be started (S410).

The BM-SC 400 determines whether the content acquisition time stored in step 250 of FIG. 2 has arrived (S411). This means that the relevant content should be downloaded shortly after the start of the service. This time is set in the control function of the BM-SC 400 when the operator inputs a service in consideration of the size of the corresponding content file and the download time between the MB source server and the BM-SC.

When the content acquisition time arrives a certain time before the actual MBMS service should start, the BM-SC 400 sends a session of any service to the external MB source server 510a-n to download the corresponding content. A Contents Request message including a Service ID and a Session ID indicating whether the content is required is transmitted (S412).

 Upon receiving the content file download request, the external MB source server 510a-n finds and downloads content for the corresponding session of the corresponding service and delivers the content to the BM-SC 400 (S413). When the content delivery is completed in the external MB source server 510a-n, content download complete including a service ID and a session ID is transmitted to the BM-SC 400. ), A message is sent to inform the completion of the delivery of the content file for the session of the corresponding service (S414).

At this time, the BM-SC 400 temporarily stores the content for the downloaded session (S415) and prepares to start the session.

After obtaining the corresponding content, the BM-SC 400 determines a session establishment start time for a random service (S421). When the session establishment start time arrives, a session establishment procedure for a corresponding service for radio bearer setup to deliver corresponding content is performed (S422). At this time, the start of the service session is processed based on the value set in step 220 of FIG. 2 and the session establishment procedure is performed by the GGSN 320, SGSN 310, and Radio Network Controller (RNC) (hereinafter referred to as BM-SC 400). 220a-220n), via a user terminal (UE) 100, and is performed by a session establishment procedure specified in standard 3GPP TS 26.346.

When the session setting procedure is completed, the BM-SC 400 determines whether the start point of delivery of the corresponding content has arrived (S425), and when the start point of content delivery arrives, the content for delivering the corresponding content to the terminal through the mobile communication network. Drive the delivery module (S426).

The content delivery module generates a multicast packet according to a packet generation procedure suitable for the type of content and delivers the multicast packet to the GGSN 320 serving as an access point of the 3GPP system. The content packet transmitted to the GGSN 320 is delivered to the SGSN 310 and the radio network controller (RNC) 220a-220n using a GTP tunnel and is transmitted to the user through a radio bearer established between the RNC and the user terminal (UE). It is delivered to the terminal (UE) 100 (S427).

The content delivery module monitors whether the delivery of the corresponding content file is completed and determines whether the delivery of the corresponding content is completed (S428). The BM-SC 400 performs a service session release procedure for releasing a radio bearer that has already been allocated when content data delivery for the corresponding service is completed (S429).

The session release procedure is also performed according to the procedure specified in the standard 3GPP TS 26.346 via the GGSN 320, SGSN 310, Radio Network Controller (RNC) 220a220n, and UE 100 under the BM-SC 400. Is performed by. At this time, the 3GPP network releases the radio resources connected for the service delivery.

At this time, the session establishment process (S420) and the content acquisition process (S410) for each service may be performed by changing the processing order. That is, as shown in FIG. 4, the content file may be downloaded before the session establishment procedure for any MBMS service. On the other hand, the content file may be downloaded after the session establishment is completed. Whichever method is used, start times for each event described in FIG. 2 should be specified and stored at the time of service registration so that both tasks can be completed before the actual MBMS service start time, and processing is performed based on this.

5 is a flowchart illustrating a process in which a BM-SC delivers MBMS service content using an external content provider according to an embodiment of the present invention. That is, it is a flowchart of a case where the BM-SC 400 provides only a delivery path using an external content provider (CP) having a content delivery function.

In this case, the BM-SC 400 is not responsible for internally downloading the corresponding content for the service before the service start time, and the BM-SC 400 is only responsible for the work of the control plan for the MBMS service. All processing related to content traffic is performed by external content provider (CP) processing.

That is, when the MBM service session establishment start time arrives (S501), the BM-SC 400 performs a session setting procedure for delivering contents of the user terminal and the corresponding service through the mobile communication network (S502). In operation S503, a content delivery request message including a service ID and a session ID is transmitted to the external content provider CP. At this time, the session establishment procedure must also be set before the actual service start time and is processed using the value determined in step S220 of FIG.

Upon receiving the content delivery request message, the external content provider (CP) 510a-n monitors the time at which delivery of the corresponding content should start, and when the content delivery time arrives (S504), the actual content is transmitted to the BM-SC 400. The broadcast is multicasted / multicasted to a plurality of user equipments (UEs) through a distribution tree below the GGSN 320 or below (S505).

When the delivery of the corresponding content is completed (S506), the external content provider (CP) 510a-n informs the BM-SC 400 that the delivery of the corresponding content for the corresponding service is completed. And a Contents Delivery Complete message including a Session ID (S507).

Upon receiving the content delivery completion message, the BM-SC 400 performs a procedure of releasing a service session established for a corresponding service (S508).

The embodiments of the present invention described above are not implemented only through the apparatus and the method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded. Implementation may be easily implemented by those skilled in the art from the description of the above-described embodiments.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

As described above, according to the present invention, the BM-SC node controlling the MBMS service stores and manages the contents by the BM-SC itself in order to deliver the contents for any service to a plurality of user terminals. And the structure of providing a service simultaneously with an external content provider (CP) can be expected to be effective. In addition, depending on the characteristics of the MBMS service, various forms, modification cycles, and methods of providing the contents may vary, and according to such characteristics, it may be efficient to manage contents by the BM-SC itself and to use an external content provider. It seems to be distinct. In preparation for such a situation, the present invention is based on the BM-SC control software by inputting relevant information into the system according to the structure and what structure each service uses when the BM-SC operator stores the service information. By performing event scheduling such as a service session start time, content acquisition time, and content delivery start time, the content providing method may be supported for each service.

Claims (13)

A UTRAN composed of a plurality of Node Bs, a plurality of Radio Network Controllers (RNCs), a core network (CN) composed of a plurality of GGSNs connected to a plurality of SGSNs for providing packet services, and a multimedia broadcasting type linked to the GGSN. A method of providing contents of a multimedia broadcasting multicast service (MBMS) in a mobile communication network including a broadcasting multicast service control node (BM-SC) controlling a multicast service (MBMS) service, (a) setting, by the BM-SC, various time information and operation information for an MBMS service; (b) obtaining corresponding content for MBMS service from an external content provider / multicast broadcast source server (CP / MB source); (c) establishing a service session with a user terminal for radio bearer setup to deliver the corresponding content; (d) the BM-SC delivering contents by broadcasting / multicasting the contents by a content delivery module to a plurality of user terminals through a mobile communication network; And (e) releasing a service session for releasing a pre-allocated radio bearer when content delivery for a corresponding MBMS service is completed; Content providing method of the multimedia broadcast type multicast service comprising a. The method of claim 1, After completion of the session setting procedure, determining whether a start point of delivery of the corresponding content has arrived; and if the start point of delivery of the corresponding content is reached, driving the content delivery module. . The method according to claim 1 or 2, The content delivery module further comprises the step of monitoring the transmission of the content file for the service to determine whether the delivery is complete content providing method of the multimedia broadcast type multicast service. The method of claim 1, Step (a) is, Registering information on the MBMS service and storing information on the service, information on a session constituting the service, and operation information; Designating, by the BM-SC, a time point for starting a session establishment procedure for the service with reference to the actual service time; Determining, by the BM-SC, whether to use an MB source server or a content provider (CP) to provide content; Designating information about a start time of delivering the content when the content is obtained from the internal MB source and the service content is provided by the BM-SC itself; When using an external MB source server, determining whether a content acquisition procedure is started by an external MB source server and whether the BM-SC uses a method of acquiring content for each session in association with a session establishment procedure; And When the BM-SC acquires content for each session in connection with a session establishment procedure, designating a time for obtaining content for each session from an external MB source server Content providing method of the multimedia broadcast type multicast service comprising a. The method of claim 1, Step (b) is, The external MB source server determines that a change to any content has occurred, and transmits a Contents Update Notification message including a service ID, a session ID, and a content file name to the BM-SC. Doing; Receiving the content change notification message, forwarding a Contents Request message including a service ID and a session ID to the external MB source server for downloading the corresponding content file; Downloading content from the external MB source server to the BM-SC; Transmitting contents download complete message including a service ID, a session ID, and a content file name for the corresponding content file to the BM-SC after completing delivery of the corresponding content by the MB source server; And Receiving, by the BM-SC, replacing and storing existing content stored in the BM-SC with new content for each service; Content providing method of the multimedia broadcast type multicast service comprising a. The method of claim 1, Step (b) is, Transmitting a Contents Request message including a service ID and a session ID to the external MB source server when the content acquisition time arrives a predetermined time before the actual MBMS service starts; .  Downloading the corresponding content for the session of the service from the external MB source server and delivering the content to the BM-SC; When the content delivery is completed in the external MB source server, transmitting a Contents Download Complete message including a service ID and a session ID to the BM-SC; And. The BM-SC temporarily storing contents for the session and preparing to start a session Content providing method of the multimedia broadcast type multicast service comprising a. The method of claim 1, Step (a) is, When broadcasting service information by BM-SC control software, event scheduling is performed for each service session start time, content acquisition time, and content delivery start time to provide broadcasting contents for each MBMS service. How to provide content for the service. The method of claim 1, The session establishment procedure of the multimedia broadcast type multicast service, characterized in that the GGSN, SGSN, Radio Network Controller (RNC), user terminal (UE) below the BM-SC performs the session establishment procedure specified in the standard 3GPP TS 26.346. How to provide content. The method of claim 1, The content providing method of the multimedia broadcast type multicast service, characterized in that before the content delivery time, the content file can be downloaded in the order of the content acquisition process after the session setting process for each service. A UTRAN composed of a plurality of Node Bs, a plurality of Radio Network Controllers (RNCs), a core network (CN) composed of a plurality of GGSNs connected to a plurality of SGSNs for providing packet services, and a multimedia broadcasting type linked to the GGSN. A method of providing contents of a multimedia broadcasting multicast service (MBMS) in a mobile communication network including a broadcasting multicast service control node (BM-SC) controlling a multicast service (MBMS) service, (a) setting various time information and operation information for MBMS service in the BM-SC; (b) when the MBMS service session establishment start time arrives, performing a session establishment procedure for delivering contents of the user terminal and the corresponding service through the mobile communication network; (c) transmitting a Contents Request message including a service ID and a session ID to an external CP at a content delivery time point; (d) when the external CP / MB source server arrives at the corresponding content delivery time point, the corresponding content is broadcasted / multicasted and transmitted to a plurality of user terminals through a distribution tree below GGSN through the BM-SC; ; (e) an external CP delivering a contents delivery complete message including a service ID and a session ID to the BM-SC; And (f) if the BM-SC receives the content delivery completion message, performing a service session release procedure established for a corresponding service; Content providing method of the multimedia broadcast type multicast service comprising a. The method of claim 10, Step (a) is, Registering information on the MBMS service and storing information on the service, information on a session constituting the service, and operation information; Designating, by the BM-SC, a time point for starting a session establishment procedure for a corresponding service with reference to an actual service time; Determining, by the BM-SC, whether to use an MB source server or a content provider (CP) to provide content; Designating information about a start time of delivering the content when the content is obtained from the internal MB source and the service content is provided by the BM-SC itself; When using an external MB source server, determining whether a content acquisition procedure is started by an external MB source server and whether the BM-SC uses a method of acquiring content for each session in association with a session establishment procedure; And When the BM-SC acquires content for each session in connection with a session establishment procedure, designating a time for obtaining content for each session from an external MB source server Content providing method of the multimedia broadcast type multicast service comprising a. The method of claim 10, Step (b) is, Content of the multimedia broadcast type multicast service, wherein only the delivery path is provided by the BM-SC and an external content provider (CP) having a content delivery function transmits the broadcast content to a plurality of user terminals. How to Provide. The method of claim 10, The BM-SC performs a task of a control plan for an MBMS service and provides all processing related to content delivery in the external content provider (CP).

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