KR20100055755A - Method for updating service guide in mobile broadcast system - Google Patents

Abstract

PURPOSE: A method for updating a service guide in a mobile broadcasting system is provided to transmit information which can determines whether a service guide is updated through a broadcasting channel, thereby enabling the mobile terminal to quickly determine whether the service guide is updated. CONSTITUTION: Guide information for updating a service guide is broadcast through a one-directional broadcasting channel(S210). A request for updating the service guide is received from a mobile terminal(S230). Update data requested to the mobile terminal is transmitted through a bi-directional channel(S240). The guide information includes version information of plural fragments which configure the service guide.

Description

How to update service guide in mobile broadcasting system {METHOD FOR UPDATING SERVICE GUIDE IN MOBILE BROADCAST SYSTEM}

The present invention relates to a mobile TV service applying a mobile broadcast business management system (MBBMS), and more particularly to a method of providing update information of a service guide to a mobile terminal.

In order for the mobile terminal to receive the multimedia broadcasting data in the mobile broadcasting system, the mobile terminal receives the service guide including information on the multimedia broadcasting data, service charging information, a method of receiving the multimedia broadcasting data, and the like. Receive the corresponding multimedia broadcast data using.

CMMB (china mobile multimedia broadcasting) / MBBMS does not support IP (Internet protocol) in a broadcasting network, and in such CMMB / MBBMS mobile TV service environment, a mobile terminal receives a service guide from a service guide server through an interactive channel. Receives and periodically accesses the service guide server to check whether the service guide is updated.

1 is a diagram for explaining a process of updating a service guide in a conventional mobile broadcasting system.

In step S110, through the bidirectional channel, the mobile terminal 10 periodically requests the service guide server 20 to update the service guide. At this time, the mobile terminal 10 transmits the identification data of the service guide to the service guide server 20.

In step S120, the service guide server 20 compares the identification data of the service guide received from the mobile terminal 10 with the identification data of the latest service guide. The service guide server 20 performs step S130 when the service guide held by the mobile terminal 10 is a previous version, and moves when the service guide held by the mobile terminal 10 is the latest version. Notifies the terminal 10 that no update is necessary.

In operation S130, the service guide server 20 transmits update data to the mobile terminal 10 through the bidirectional channel. For example, the service guide server 20 transmits to the mobile terminal 10 fragments determined to be updated in step S120 among all fragments constituting the latest service guide.

In step S140, the mobile terminal 10 analyzes the update data received from the service guide server 20, and updates the corresponding fragments of the service guide holding on the basis of the update data.

As described above, the conventional service guide update method has the following problems.

First, since a plurality of mobile terminals periodically connect to the service guide server through a bidirectional channel to determine whether the update is necessary, an excessive time is required for the update process, and resources of the mobile terminal are excessively consumed.

Second, since the service guide server needs to receive update requests from a plurality of mobile terminals and perform comparison confirmation and response for each update request, the service guide server is overloaded.

Accordingly, there is a need for a method of updating a service guide that can minimize resource consumption of a mobile terminal and load of a service guide server.

According to an aspect of the present invention, there is provided a method of updating a service guide for receiving multimedia broadcast data in a mobile broadcasting system, the method comprising: broadcasting guide information for updating a service guide through a one-way broadcast channel; Receiving an update request of the service guide from a mobile terminal through a bidirectional channel; And transmitting the requested update data to the mobile terminal through the bidirectional channel.

In a mobile broadcast system according to another aspect of the present invention, a method for updating a service guide for receiving multimedia broadcast data by a mobile terminal includes: receiving guide information for updating a service guide through a one-way broadcast channel; Requesting the service guide server for update data of the service guide through a bidirectional channel; Receiving the update data from the service guide via the bidirectional channel; Updating the service guide held by the mobile terminal based on the update data.

In the method of updating the service guide according to the present invention, the mobile terminal can quickly determine whether the service guide is updated by transmitting information for determining whether the service guide is updated through a broadcast channel, Since the service guide server is accessed through the bidirectional channel only when updated, the resource consumption of the mobile terminal and the load of the service guide server can be minimized.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention; In describing the present invention, detailed descriptions of related well-known functions and configurations are omitted in order not to obscure the subject matter of the present invention.

2 is a view showing the structure of a service guide according to a preferred embodiment of the present invention. The illustrated service guide structure is in accordance with the proposal of BAC-BCAST, which is merely an example and does not limit the present invention. BAC-BCAST is a sub-work group (SWG) of the browser and content (BG) work group (OG) of OMA (open mobile alliance), an organization that researches standards for interoperability of mobile solutions. Abbreviated name. BAC-BCAST is researching a technology for implementing a broadcast service through a mobile terminal.

The service guide includes a plurality of fragments classified according to a purpose or a function, and the service guide may be divided into four groups according to a purpose, that is, an administrative group 100, a provisioning group 110, It is classified into a core group 120 and an access group 130. In this case, the solid line connecting the two fragments means cross-reference.

The management group 100 provides basic information for the mobile terminal to receive the service guide. The management group 100 includes a service guide context 101 and a service guide delivery descriptor (SGDD) 102.

The service guide context 101 provides a service guide identifier (ID), identification information of the operator who generated the service guide, and other information on the overall service guide.

The SGDD 102 informs the mobile terminal of a channel, schedule information, and version information of service guide fragments, so that the mobile terminal can receive necessary service guide fragments at a suitable time. to provide.

The supply group 110 provides fee information for receiving a service. The supply group 110 includes a purchase item fragment 111, a purchase data fragment 112, and a purchase channel fragment 113. The purchase item fragment 111 provides fee information on a service or a service bundle, and the purchase data fragment 112 provides information on how a service user can pay the fee. The purchase channel fragment 113 provides information on a system in which a service user can actually purchase a service.

The core group 120 provides information about the service itself. The core group 120 includes a service fragment 121, a schedule fragment 122, and a content fragment 123. The service fragment 121 provides a description of the service itself to be received by the user and information on what content the service can be configured, and the schedule fragment 122 provides the service at a time when the service can be supplied and used. The content fragment 123 provides information on a plurality of contents constituting the service.

The access group 130 includes an access fragment 131 and a session description fragment 132 and service access information on how to receive services provided through the core group 120. And providing the mobile terminal with specific information on the session in which the contents constituting the service are transmitted, to allow the mobile terminal to access the service. The access fragment 131 provides a method for accessing various additional services based on one service by providing a plurality of access methods for one service to the mobile terminal. The session description fragment 132 provides session information on a service defined in one access fragment.

The service guide may further include a preview data fragment 124 that provides a preview of the service and content, an icon, and the like.

3 is a diagram illustrating a process in which a mobile terminal receives individual fragments of a service guide in a mobile broadcast system according to an exemplary embodiment of the present invention.

In the mobile broadcast system, the service guide is delivered to the mobile terminal as an object in binary form, and a service guide delivery unit (SGDU) 204 represents such an object. One SGDU 204 includes one or a plurality of fragments 205. The fragment 205 may include a service fragment 121, a schedule fragment 122, a content fragment 123, a preview data fragment 124, an access fragment 131, a session analysis fragment 132, and a purchase item fragment 111. , Purchase data fragment 112, purchase channel fragment 113, and the like.

The SGDU 204 is delivered to the mobile terminal via a bidirectional channel, and the SGDD 202 includes information for receiving such an object. Therefore, the individual fragments constituting the service guide are included in the SGDU 204 indicated by the SGDD 202 and delivered to the mobile terminal.

Sessions to which service guides are delivered are classified into two categories: One is an announcement session 201 and the other is a delivery session 203. Through the announcement session 201, the mobile terminal receives the SGDD 202 from the system, checks the delivery session 203 through the received SGDD 202, and receives the SGDU 204 existing in the session. You receive the corresponding fragment that makes up the service guide.

4 is a diagram illustrating a configuration of a mobile broadcast system according to a preferred embodiment of the present invention, and FIG. 5 is a diagram for explaining a process of updating a service guide in the mobile broadcast system.

The mobile broadcast system transmits a broadcast signal including multimedia broadcast data and control data through a one-way broadcast channel to the mobile terminal 330 through a request or query through a bidirectional channel and a response thereto. After receiving a service guide from the service guide server 320 including a service guide server 320 for transmitting a service guide, information on multimedia broadcast data, service billing information, a method of receiving multimedia broadcast data, and the like, The mobile terminal 330 receives corresponding multimedia broadcast data from the broadcast server 310 using a service guide. The mobile terminal 330 is configured to extract and analyze a broadcast receiver 340 for receiving a broadcast signal from the broadcast server and a control information table received through a control logical channel (CLCH) from the broadcast signal. CLCH analyzer 350, a service guide engine 360 for receiving and analyzing service guides from the service guide server 320, and service guide information received from the service guide engine 360. It includes a display unit 370 for displaying on the screen.

As the mobile terminal 330 enters the mobile broadcast system for the first time, the mobile terminal 330 accesses the service guide server 320 to receive a service guide, and transmits the corresponding multimedia broadcast data using the service guide. After receiving from), it will be described in detail how to update the service guide in possession.

Step S210 is a step of broadcasting information for guiding the update of the service guide. Through the CLCH, the broadcasting server 310 broadcasts the version information of the latest service guide. Control information table ID values defined in the current CMMB / MBBMS standard are shown in Table 1 below.

The broadcast server 310 allocates any one of the control information table ID values in the "reserved" state for update guidance to inform the mobile terminal 330 of the update of the service guide.

Version information of the latest service guide is represented as a service guide update notification table as shown in Table 2 below.

The fields of the service guide guide table are described below.

. Table identifier number:

Service guide has a value that means it is an update guide table.

. Sequence number for update:

It is incremented by one when the service guide is updated.

. OffsetTime:

The mobile terminal 330 starts the update after OffsetTime * R (msec) by generating a random value R in the range of 0 to 1. This is to prevent a plurality of mobile terminals from simultaneously accessing the service guide server 320 and causing an overload.

. number of SGDD update data:

This is the number of SGDD id / versions.

. length of id:

ID length.

. id:

Represents an identifier of an SGDD or a fragment.

. length of version:

Indicates the length of version for SGDD or fragment.

. version:

Indicates the version of SGDD or fragment.

In step S220, the mobile terminal 330 detects that the value of the Sequence number for update field is changed in the service guide update guide table received from the broadcast server 330 via CLCH, and the version information of the service guide being held and Compare the version information of the latest service guide received. That is, the mobile terminal 330 determines the list of SGDDs and fragments that need to be updated by comparing the versions of the SGDDs and fragments of the service guide with the versions of the SGDDs and fragments of the latest service guide.

In step S230, the mobile terminal 330 transmits an update request message to the service guide server 320 through a bidirectional channel. The mobile terminal 330 attempts to access the service guide server 320 after a time of OffsetTime * R (msec) has elapsed by generating a random value R in the range of 0 to 1. After the delay time elapses, it is possible to prevent a plurality of mobile terminals from simultaneously accessing the service guide server and causing an overload. The mobile terminal 330 includes the ID and version information of the SGDD in the header of the HTTP request message in the same manner as "sgddID = sgddID_value & version = sgdd_version", and the ID and the fragment of the fragment are included in the body of the HTTP request message. Version information is included in the XML code as shown in Table 3 below.

In operation S240, the service guide server 320 transmits the requested update data to the mobile terminal 330 through a bidirectional channel. The update data includes SGDDs and fragments requested by the mobile terminal 330.

In step S250, the mobile terminal 330 analyzes the update data received from the service guide server 320, and updates the corresponding SGDDs and fragments of the service guide that is held based on the update data. That is, the corresponding SGDDs and fragments of the held service guide are replaced with newly received SGDDs and fragments.

On the other hand, in the detailed description of the present invention has been described with respect to specific embodiments, it will be apparent to those skilled in the art that various modifications are possible without departing from the scope of the present invention.

Obviously, the method of updating the service guide of the present invention may be implemented in the form of hardware, software (ie, a program), or a combination thereof. Such a program may be stored in a machine-readable volatile or nonvolatile recording medium such as a computer, and the recording medium may be a storage device such as a ROM, a memory such as a RAM, a memory chip, an integrated circuit, a CD, a DVD, a magnetic disk, or the like. , Magnetic tape or the like. That is, the service guide update method of the present invention may be embodied in the form of a program including codes for realizing this. Further, such a program may be electrically transmitted through any medium, such as a communication signal propagating by wire or wirelessly, and the present invention includes equivalents thereof.

1 is a view for explaining a process of updating a service guide in a conventional mobile broadcasting system;

2 is a view showing the structure of a service guide according to an embodiment of the present invention;

3 is a diagram illustrating a process in which a mobile terminal receives individual fragments of a service guide in a mobile broadcast system according to an embodiment of the present invention;

4 is a diagram showing the configuration of a mobile broadcast system according to an embodiment of the present invention;

FIG. 5 is a diagram for explaining a process of updating a service guide in the mobile broadcasting system shown in FIG. 4; FIG.

Claims (9)

A method of updating a service guide for receiving multimedia broadcasting data in a mobile broadcasting system, Broadcasting guide information for updating a service guide through a one-way broadcast channel; Receiving an update request of the service guide from a mobile terminal through a bidirectional channel; And transmitting the requested update data to the mobile terminal through the bidirectional channel. The method of claim 1, And the guide information includes version information of a plurality of function-specific fragments constituting the service guide. The method of claim 2, The guide information further includes version information of a service guide delivery descriptor related to a channel or time at which the mobile terminal can receive the function-specific fragments. The method of claim 1, And the broadcast channel is a control logical channel. A method for updating a service guide for receiving multimedia broadcasting data by a mobile terminal in a mobile broadcasting system, Receiving guide information for updating a service guide through a one-way broadcast channel; Requesting the service guide server for update data of the service guide through a bidirectional channel; Receiving the update data from the service guide via the bidirectional channel; Updating the service guide held by the mobile terminal based on the update data. The method of claim 5, And the guide information includes version information of a plurality of function-specific fragments constituting the service guide. The method of claim 6, The guide information further includes version information of a service guide delivery descriptor related to a channel or time at which the mobile terminal can receive the function-specific fragments. The method of claim 5, And the broadcast channel is a control logical channel. The method of claim 5, The method may further include comparing version information of the service guide included in the guide information with version information of the service guide held by the mobile terminal. In the request process of the update data, the mobile terminal transmits the version information on the changed fragments identified in the comparison process among the plurality of function-specific fragments constituting the service guide to the service guide server How to update service guide in broadcast system.

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