KR101182532B1 - Method, DCD/BCMCS Interworking System, DCD Server, SMD Center, And Terminal for Delivering Content to Stand-by Screen of Terminal - Google Patents

Abstract

The present invention relates to a method for transmitting content to an idle screen of a terminal, and a DCD / BCMCS interworking system, a DCD server, a SMD center, and a terminal therefor.

The present invention provides a DCD / BCMCS (Dynamic Content Delivery / Broadcast Multicast Service) interworking system for transmitting content stored in a DCD (Dynamic Content Delivery) server to a standby screen of a terminal, wherein the content stored in the DCD server and the content are stored in the DCD server. A content relay function for receiving information on whether the content recovery function is applied and transmitting the information to the terminal, a download result report relay function for receiving a download result report message for the content from the terminal and delivering the result to the DCD server, and resending the content from the terminal A SMD center configured to receive a request message and perform a content recovery function for transmitting retransmitted content for the content to the terminal; A content delivery function that receives the content transmitted from the SMD center and delivers the content to a DCD client in the terminal, and a download state that detects a download state of the content and determines whether it is in a positive state or a negative state. A detection determination function, a message generation function of generating the download result report message when the detected download state is the positive state, and generating the content retransmission request message when the detected download state is a negative state; A download result reporting function for transmitting the download result report message generated when the downloaded download state is the positive state to the SMD center, and the content retransmission request generated when the detected download state is the negative state A terminal including a SMD management unit configured to transmit a request message to the SMD center to perform a content recovery request function for receiving the resent content for the content; And a content storage function for storing the content, an information generation function for generating information on whether the recovery function is applied to the content, a content transmission function for transmitting the content and the information on whether the recovery function is applied to the SMD center, and a content transmission function. And a DCD server performing a download result report message receiving function for receiving the download result report message from the SMD center.

According to the present invention, despite the deterioration of network conditions including wireless networks and terminals, DCD servers, SMD centers, and the like that may occur during content transmission, a download result reporting method and a retransmission method are used as reliable transmission guarantee methods. Therefore, there is an effect of ensuring a reliable content transmission to the terminal, thereby providing a satisfactory content transmission service to the user, and increases the economic profitability to the carrier or content provider.

Content, terminal, transmission, reliability

Description

Method of transferring contents to the standby screen of the terminal, and for the CD / PCC interworking system, the CD server, the SD center and the terminal {Method, DCD / BCMCS Interworking System, DCD Server, SMD Center, And Terminal for Delivering Content to Stand-by Screen of Terminal}

The present invention relates to a method for transmitting content to a standby screen of a terminal, and a DCD / BCMCS interworking system, a DCD server, a SMD center, and a terminal therefor. More specifically, despite the deterioration of network conditions including wireless networks and terminals, DCD servers, SMD centers, etc., which can occur during content transmission, the download result reporting method and the retransmission method are used as a reliable transmission method. This ensures reliable content delivery to the terminal, thereby providing a satisfactory content delivery service to the user, and delivering content to the standby screen of the terminal, which has the effect of increasing economic profitability to the telecommunications provider or content provider. And a DCD / BCMCS interworking system, a DCD server, a SMD center, and a terminal therefor.

Nowadays, due to the expansion of network infrastructure, there are many content providers that produce and store the contents that users want, and users can receive the contents by visiting the relevant sites operated by these contents providers. .

In order to effectively deliver such contents, Web Syndication is urgently needed to deliver information produced and changed in real time on the Internet, and RSS (Really Simple Syndication) is a kind of Web Syndication. ) And ATOM have been proposed to become a standard, and the distribution of contents is possible due to such RSS and ATOM, and the collection of contents through a program such as RSS Reader has become much smoother.

However, in a relatively resource-constrained mobile environment, access to content distributed using RSS / ATOM as in a PC environment is limited. In order to solve this problem, there is a demand for a method for delivering the collected content in an optimized form for mobile terminals, and a representative example is Dynamic Content Delivery (DCD), which is being promoted by the Open Mobile Alliance (OMA). "DCD"). The purpose of the DCD service using the DCD technology is to deliver the contents desired by the user to the terminal user in the most effective way by reflecting the user's preferences. A push method using a DCD-2 interface for receiving a content update (transmission) request message from a terminal and transmitting the corresponding content to the terminal by transmitting a notification message to the terminal has been proposed. By the push method using the DCD-2 interface, the user's terminal accesses the site on the wireless Internet in the existing mobile service and goes through the various steps to find the content and makes the content difficult for the user. The purpose of the DCD is to deliver to the user's terminal without visiting, and to provide the content desired by the user to maximize the preference (Preference). In other words, the DCD service is a user-customized content transmission service to the user. In addition, the DCD also accepts a pull method using a DCD-1 interface in which a DCD server transmits content to a terminal by a content updater (transmission) request from an existing user's terminal. A DCD system providing such a DCD service will be described with reference to FIG. 1.

1 is a diagram illustrating a conventional DCD system for providing a content transmission function to a terminal idle screen.

Referring to FIG. 1, a DCD system for a DCD service for transmitting content to a standby screen of a terminal 100 includes a terminal 100 including a DCD client 110 and a DCD application 120, and a DCD content providing server ( DCD Content Provider: DCD CP, hereinafter referred to as "DCD CP" 140, the DCD server 150, and the network 130.

Referring to FIG. 1, a DCD service may be described as a client server model. The DCD service may be performed by interworking with a DCD client 110 serving as a client and a DCD server 150 serving as a server. The content is transmitted to the idle screen of the corresponding terminal 100 through the DCD CP 140, the DCD server 150, the DCD client 120, and the DCD application 110 in sequence.

The network 130 is a path through which a message or content is transmitted from the DCD server 150 to the DCD client 110 of the terminal 100. The network 130 includes a CDMA 1x network, an EVDO network, a WCDMA network, an HSDPA network, a HSUPA network, a Wibro network, and the like. It may be configured in at least one or more of the form of a mobile communication network, a wireless network, such as a WiFi network, a wired Internet (Wired Internet) and a broadcast (Broadcast) method, one of the DCD CP 140 and DCD server 150 It may include a DCD system including the above.

Meanwhile, in order to transmit the same information (multimedia including streaming, text message, voice, etc.) to a plurality of user terminals, the same information must be repeatedly transmitted as many as the number of terminals. A broadcast or multicast transmission technology is used to solve the terminal and network inefficiency caused by such repeated transmission, and a user using a broadcast or multicast transmission technology by a carrier or a broadcasting company Broadcast / Multicast Service (BCMCS, hereinafter referred to as "BCMCS"), a service for transmitting data such as video, voice, and messages, has been proposed, and 3GPP2 (3rd Generation Partnership Project 2) has been proposed. Standardization bodies, telecommunications providers, and manufacturers in each country are discussing standards for BCMCS. A BCMCS system for providing such a BCMCS will be described with reference to FIG. 2 below.

2 is a diagram illustrating a conventional BCMCS system for providing a content transmission function to a terminal, and the BCMCS provided by the BCMCS system includes a plurality of identical information (same multimedia including text messages, streaming, voice, video, images, etc.). It is a service provided to a user through one link and eliminates repeated transmission of the same information in a wireless section.

Such a BCMCS can be divided into a broadcast service (BCS, hereinafter referred to as "BCS") and a multicast service (MCS, hereinafter referred to as "MCS"), and the MCS is a user belonging to a restricted multicast group. The same information is transmitted only to the terminal of the terminal. To belong to the restricted multicast group, the user must go through the procedure of subscribing to the multicast service. Meanwhile, the BCS is a service in which the same information is transmitted to a terminal existing in a specific area with a boundary of a specific area (cell, sector, etc.), which is a broadcast area, and location information and traffic based on the specific area. Information, for example, can be divided into public and private services, depending on the nature of the service.

2, the BCMCS system 200 simultaneously transmits the same information to a plurality of terminals 1, 2, 3, 4, 5, and 6 in the broadcast area 220 through the network 210. Can be sent (broadcasted) In addition, the BCMCS system 200 may simultaneously transmit (multicast) the same information to the terminals 1, 2, and 3 of users belonging to the multicast group 230 generated by the MCS subscription through the network 210. have.

Referring to FIG. 2, the network 210 includes a CDMA 1x network, an EVDO network, a WCDMA network, a mobile communication network such as an HSDPA network, a HSUPA network, a Wibro network, a wireless network such as a WiFi network, a wired Internet, and a broadcast. It may be configured in at least one or more of the (Broadcast) type network, it may be configured to include the above-described BCMCS system 200.

Techniques for providing content to a terminal by interworking the above two systems for transmitting content to a terminal have been studied in the past. However, there is a problem that can not guarantee reliable content transmission to the terminal due to the deterioration of the state of the terminal, DCD server, SMD center, etc. and the network conditions including the wireless network, which may occur during the content transmission, and thus, to the user Problems such as failing to provide satisfactory content transmission service and a decrease in economic profitability to a communication service provider or content provider due to service dissatisfaction occur.

In order to solve this problem, the present invention, despite the deterioration of the state of the terminal, DCD server, SMD center, etc. and the network state including the wireless network that can occur during the content transmission, as a reliable transmission method reporting method The purpose of the present invention is to ensure reliable content transmission to a terminal using a retransmission method.

Another object of the present invention is to provide a satisfactory content delivery service using a download result report method and a retransmission method as a reliable delivery guarantee method, thereby increasing economic profitability to a communication service provider or a content provider. .

According to an aspect of the present invention for achieving the above object, in the DCD / BCMCS interworking system for transmitting the content stored in the DCD server to the idle screen of the terminal, the content stored in the DCD server and the content recovery for the content A content relay function for receiving information on whether the function is applied and transmitting the information to the terminal, a download result report relay function for receiving a download result report message for the content from the terminal and delivering the result to the DCD server, and a content retransmission request message from the terminal A SMD center configured to perform a content recovery function of receiving and transmitting retransmitted content for the content to the terminal; A content delivery function that receives the content transmitted from the SMD center and delivers the content to a DCD client in the terminal, and a download state that detects a download state of the content and determines whether it is in a positive state or a negative state. A detection determination function, a message generation function of generating the download result report message when the detected download state is the positive state, and generating the content retransmission request message when the detected download state is a negative state; A download result reporting function for transmitting the download result report message generated when the downloaded download state is the positive state to the SMD center, and resending the content generated when the detected download state is the negative state The terminal includes a unit that transmits a request message SMD to the center SMD performs content recovery request function of receiving the retransmitted content for the content; And a content storage function for storing the content, an information generation function for generating information on whether the recovery function is applied to the content, a content transmission function for transmitting the content and the information on whether the recovery function is applied to the SMD center, and a content transmission function. A DCD / BCMCS interworking system for transmitting contents to a standby screen of a terminal, characterized in that it comprises a DCD server for performing a download result report message receiving function for receiving the download result report message from the SMD center.

According to another aspect of the present invention for achieving the above object, in the DCD server providing a content transmission function to the standby screen of the terminal in the DCD / BCMCS interworking system, the content storage for performing the content storage function for storing the content Management; An information generation management unit for generating information on whether to apply a recovery function to the content and response time out information indicating a reception time of the download result report message for the content; A content transmission function for transmitting the content and information on whether the recovery function is applied to the content to a SMD center, and the response time out information after transmitting the response time out information to the SMD center; A data transmission manager configured to perform a content retransmission function of retransmitting the content to a DCD client of the terminal when the download result report message is not received; A download result report receiving manager which performs a download result report message receiving function for receiving a download result report message for the content from the SMD center; And a response time limit monitoring manager configured to monitor the response time limit (RTO). The DCD / BCMCS interworking system provides a DCD server providing a content transmission function to a terminal idle screen.

According to another aspect of the present invention for achieving the above object, in the SMD center providing a function for transmitting the content to the standby screen of the terminal in the DCD / BCMCS interworking system, the content stored in the DCD server and the content A content relay manager which receives a content recovery function application information and performs a content relay function to transmit the content to the SMD manager in the terminal; A download result report relay manager configured to perform a download result report relay function for receiving a download result report message for the content from the SMD manager and transferring the result to the DCD server; And a content recovery management unit configured to receive a content retransmission request message from the terminal, and perform a content recovery function of transmitting the retransmitted content for the content to the terminal. Provides SMD centers that provide content transfer to

According to another aspect of the present invention for achieving this object, in the terminal including a SMD management unit for receiving content in the DCD / BCMCS interworking system, the SMD management unit, by receiving the content transmitted from the SMD center A content delivery manager that performs a content delivery function of delivering the content to a DCD client in the terminal; A download state detection determination manager configured to detect a download state of the content and perform a download state detection determination function of determining whether the download state is a positive state or a negative state; Generating a download result report message when the detected download state is the positive state, and generating a content retransmission request message when the detected download state is a negative state; Message generation management unit; A download result report management unit which performs a download result report function of transmitting the generated download result report message to the SMD center when the detected download state is the positive state; And a content recovery request function of transmitting a content retransmission request message generated when the detected download state is the negative state to the SMD center to receive the retransmission content for the content. Provided is a terminal that provides a content transmission function to a terminal idle screen by using a DCD / BCMCS interworking system comprising a management unit.

According to another aspect of the present invention for achieving the above object, in the DCD / BCMCS interworking system for transmitting content to the standby screen of the terminal, (a) the SMD management unit in the terminal is transmitted from the DCD server A content download step of receiving the content and information on whether to apply a content recovery function to the content via a SMD center; (b) a content download state detection step of detecting, by the SMD management unit, a download state of the content; (c) a content download state determination step of determining, by the SMD management unit, whether the download state is a positive state or a negative state; (d) if the download state determined in step (c) is the positive state, the SMD manager delivers the content to a DCD client in the terminal and sends the content to the DCD server via the SMD center. A content download result report step of transmitting a download result report message of the content; (e) a content recovery step of receiving, by the SMD management unit, a request for retransmission of the content to the SMD center by receiving the retransmission content of the content if the download state determined in step (c) is the negative state; It provides a method for transmitting content to the terminal idle screen in the DCD / BCMCS interworking system comprising a.

As described above, using the present invention, despite the deterioration of the state of the terminal, DCD server, SMD center, etc. and the network state including the wireless network that can occur during the content transmission, as a reliable transmission method report the download result By using the method and the retransmission method, there is an effect of ensuring the reliable content transmission to the terminal.

According to the present invention, as a reliable transmission guaranteeing method, a satisfactory content transmission service is provided to a user by using a download result reporting method and a retransmission method, thereby increasing economic profitability to a communication service provider or a content provider.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention unclear.

3 is a diagram illustrating a DCD / BCMCS interworking system for providing a content transmission function to the terminal idle screen in the DCD / BCMCS interworking system according to an embodiment of the present invention.

Referring to FIG. 3, a DCD / BCMCS interworking system for transmitting content stored in a DCD server to a standby screen of a terminal is a starting point at which the content is transmitted. DCD client 310 which is an end point as an end point, and SMD (Scheduled Multimedia Download: SMD) management unit 320 in a section performing a reliable transmission guarantee function during content transmission; It is configured to include the SMD center 340, and further comprises a network 330 as a path for transmitting the content, the above-mentioned DCD client 310 and SMD management unit 320 inside the terminal 300 exist.

The SMD center 340 receives the content stored in the DCD server 350 and whether the content recovery function is applied to the content and transmits the content to the SMD management unit 320 in the terminal 300, and the SMD management unit in the terminal. A download result report relay function for receiving the download result report message for the content from the 320 and transmitting the DCD server 350 to the DCD server 350, and receives a content retransmission request message from the SMD management unit 320 in the terminal 300. Performs a content recovery function of transmitting the resent content to the SMD management unit in the terminal 300.

SMD center 340 receives and stores the content from the DCD server 350, and additionally performs a temporary content storage function to receive a download result report message for the content from the SMD management unit 320 and delete the previously stored content. do.

The SMD manager 320 in the terminal 300 receives the content transmitted from the SMD center 340 and delivers the content to the DCD client 310 in the terminal 300. Download status detection determination function for determining whether the status is positive or negative; generating a download result report message when the detected download status is the positive status; and the detected download status is negative A message generation function for generating a content retransmission request message in a state; a download result report function for transmitting the generated download result report message to the SMD center 340 when the detected download state is a positive state; If the detected download status is negative, the generated content resend request message is sent. It transmits to the MD center 340 includes a content recovery request function for receiving the re-sent content for the content.

Referring to FIG. 3, the above-described section between the SMD center 340 and the SMD manager 320 is a section that performs a function for reliably transmitting content between end-to-end (between the DCD client and the DCD server). It is a section for detecting and determining the download status, reporting the download result, reporting the download result or restoring contents according to the download status. A reliable transmission method of such content will be described in detail with reference to FIGS. 7, 8, 9, and 10.

The terminal 300 receives the content from the SMD management unit 320 as well as the SMD management unit 320 mentioned above, and the DCD client 310 and the DCD client 310 which are end points as end points of the content transmission are provided. It is configured to include a DCD application (Application) for representing the received content to the standby screen of the terminal 300.

The DCD server 350 may include a content storage function for storing content, an information generation function for generating information on whether the recovery function is applied to the content, a content transmission function for transmitting the content and recovery function application information to the SMD center 340, and A download result report message receiving function for receiving a download result report message for the content from the SMD center 340 is performed.

The DCD server 350 is a starting point at which the content is transmitted and is an end point for transmitting the content. The DCD server 350 generates response time out (RTO) information, which means the reception time of the download result report message for the content, and SMD. When transmitting to the center 340, and if the download result report message is not received within the response time limit (RTO), the content retransmission function to directly retransmit the content to the DCD client 310 of the terminal 300 is further performed.

Response Time Out information means the time when the DCD server can receive the download result report message for the corresponding content to be received from the SMD center. The DCD server receives the download result report message from the SMD center within the response time limit. Only when it is determined that the content is well transmitted to the terminal.

The above-described DCD / BCMCS interworking system is referred to as BSM (Base Station Management: BSM), which performs a bearer path setting function of a network for transmitting content to the SMD management unit 320 in the terminal 300. It can be configured to further include a system, and the bearer path setting function of the network transmits the content from the SMD center 340 to the SMD management unit 320 and the DCD client 310 in the terminal 300 This is performed after receiving the content transmission flow start notification message indicating that the procedure for starting the content transmission flow is started.

Through the DCD / BCMCS interworking system, the content transmitted from the DCD server is guaranteed to be transmitted to the DCD client by the interworking between the SMD center and the SMD management unit in the terminal. As a reliable transmission method, a download result reporting method and a retransmission method are used.

As for the download result reporting method, the SMD management unit in the terminal ensures reliable transmission by transmitting a download result report message to the DCD server through the SMD center when the content is completely downloaded (transmitted). You will.

As for the retransmission method, there are two retransmission methods including retransmission at the SMD center and retransmission at the DCD server.

Regarding the method of resending in the SMD center stage, if the SMD management unit in the terminal has not completely downloaded (transmitted) the content, it is reliable by downloading (sent) the resent retransmitted content for the content through the content recovery request. Guaranteed transmission.

As for the method of retransmission in the DCD server side, it means that the DCD server received the content well within the response time limit (RTO) based on the response time out information transmitted when the content was sent to the SMD center. If the download result report message is not received, the DCD server retransmits the content directly to the DCD client of the terminal to ensure reliable transmission.

In addition, the recovered content, that is, the content to be resent, is managed by dividing the entire content by ignoring the portion that has already been transmitted before retransmission and by resending some contents from the next portion of the portion that was transmitted before the retransmission. Can improve.

In addition, the content recovery function may also transmit information on whether the content recovery function is applied when the DCD server transmits the content to the SMD center, thereby determining whether to use the content retransmission function according to the content characteristics, the terminal status, or the network status. Improve the efficiency of content delivery.

FIG. 4 is a diagram illustrating a DCD server in a DCD / BCMCS interworking system for providing a content transmission function to a terminal idle screen in a DCD / BCMCS interworking system according to a preferred embodiment of the present invention.

Referring to FIG. 4, the DCD server 350 that provides a content transmission function to a standby screen of a terminal in the DCD / BCMCS interworking system includes a content storage manager 351, an information generation manager 352, and a data transmission manager 353. , The download result report reception manager 354, and the response time limit monitoring manager 355.

The content storage manager 351 performs a content storage function for storing content.

The information generation manager 352 performs an information generation function of generating response time out information indicating whether the recovery function is applied to the content and the reception time of the download result report message for the content.

The data transmission management unit 353 transmits a content transmission function for transmitting content and information on whether to apply the recovery function to the SMD center, and transmits response time out information to the SMD center, and then transmits the content to the content within the response time limit. Performs a content retransmission function that retransmits the content to the DCD client of the terminal when the download result report message is not received.

The download result report receiving manager 354 performs a download result report message receiving function for receiving a download result report message for the content from the SMD center.

The response time limit monitoring manager 355 performs a function of monitoring the response time limit (RTO), which means a downloadable time of the download result report message for the content to be received from the SMD center in the download result report reception management unit 354. .

The data transmission management unit 353 described above does not receive the download result report message for the content within the response time limit (RTO) for the content by interworking with the response time limit monitoring manager 355 and the download result report reception management unit 354. And resend the contents directly to the DCD client of the terminal.

FIG. 5 is a diagram illustrating an SMD center in a DCD / BCMCS interworking system for providing a content transmission function to a terminal idle screen in the DCD / BCMCS interworking system according to an exemplary embodiment of the present invention.

Referring to FIG. 5, the SMD center 340, which provides a function of transmitting content to a standby screen of a terminal in a DCD / BCMCS interworking system, includes a content relay manager 341, a download result report relay manager 342, and content recovery. It comprises a management unit 343.

The content relay manager 341 receives the content stored in the DCD server and whether the content recovery function is applied to the content, and transmits the content to the SMD manager in the terminal.

The download result report relay manager 342 performs a download result report relay function that receives a download result report message for the content from the SMD manager and transmits the message to the DCD server.

The content recovery management unit 343 receives a content retransmission request message from the terminal, and performs a content recovery function of transmitting retransmitted content for the content to the terminal.

FIG. 6 is a diagram illustrating an SMD management unit in a terminal in a DCD / BCMCS interworking system for providing a content transmission function to a terminal idle screen in the DCD / BCMCS interworking system according to an exemplary embodiment of the present invention.

Referring to FIG. 6, the SMD management unit 320 in the terminal in the DCD / BCMCS interworking system for providing a content transmission function to the terminal idle screen in the DCD / BCMCS interworking system according to an embodiment of the present invention is a content delivery management unit. 321, the download state detection determination manager 322, the message generation manager 323, the download result report manager 324, and the content recovery request manager 325.

The content delivery manager 321 receives a content transmitted from the SMD center and delivers the content to the DCD client in the terminal.

The download state detection determination manager 322 detects a download state of the content and performs a download state detection determination function of determining whether the download state is a positive state or a negative state.

The message generation management unit 323 generates a download result report message when the detected download state is a positive state, and generates a content retransmission request message when the detected download state is a negative state. Perform the message generation function.

The download result report manager 324 performs a download result report function of transmitting the generated download result report message to the SMD center when the detected download state is a positive state.

If the detected download state is the negative state, the content recovery request manager 325 transmits the generated content retransmission request message to the SMD center and performs a content recovery request function for receiving retransmitted content for the content.

7 is a flowchart illustrating a content transmission to a terminal idle screen in a DCD / BCMCS interworking system according to a preferred embodiment of the present invention.

Referring to FIG. 7, in the DCD / BCMCS interworking system, a method for transmitting content to a standby screen of a terminal includes: SMD center of the terminal provides information on whether the content recovery function is applied to the content and the content transmitted from the DCD server. Content download step received via (S 700), content download status detection step of SMD management to detect the download status of the content (S 702), SMD management unit download status is positive (positive) or negative (Negative) status If the download state determined in the content download state determination step (S704), the content download state detection step (S702) described above is a positive state, the SMD manager delivers the content to the DCD client in the terminal, Content downloader sending a report of download results of content to the DCD server via SMD Center If the download status determined in step S706 and the content download state detection step S702 described above is negative, the SMD manager requests a retransmission of the content to a SMD center and sends the content. And a content recovery step (S 708) of receiving the resent content of.

The DCD server receiving the download result report message in the content download result reporting step (S706) generates charging data for the corresponding content.

The content transmitted by the DCD server is divided and transmitted in symbol units, and the download state in the above-described content download state detection step (S 702) is that the SMD center receives all the symbols included in the content. It may include a positive state, which is a state, and a negative state, which is a state in which only a part of a symbol is received among all symbols included in content.

The above-mentioned content recovery step (S 708) is performed in a situation where the download state is negative and the content recovery function application information is set to on.

When the SMD center stores the content received from the DCD server in the aforementioned content download step (S 700) and the SMD center receives the download result report message from the SMD management unit in the aforementioned content download result reporting step (S 706). You can delete the saved content.

The above-described content recovery step (S 708) consists of the following five detailed steps.

In the first content recovery request step, the SMD management unit sends a content retransmission request message for the content to the SMD center.

In the second retransmission content download step, the SMD management unit receives the retransmission content for the content from the SMD center.

In the third content download state detection step, the SMD manager detects the retransmitted content download state for the retransmitted content.

In the fourth retransmission content download state determination step, the SMD management unit determines whether the detected retransmission content download state is a positive state or a negative state.

Fifth, in the retransmission content download result reporting step, if the retransmission content download state determined in the retransmission content download state determination step mentioned above is positive, the SMD management unit delivers the retransmission content to the DCD client in the terminal. The download result report message for the retransmission content is transmitted to the DCD server via the center, and the DCD server receiving the download result report message generates the charging data for the content.

If the retransmitted content download state determined in the above-described retransmission content download state determination step is a negative state, the content recovery step is repeatedly performed from the above-described first step of the content recovery request step.

In the retransmission content download step, which is the second step described above, the retransmission content retransmitted for the content from the SMD center to the SMD management unit includes the entire retransmission content including all the symbols included in the content, and some symbols included in the content. One of some retransmitted content. Some of the retransmitted contents mentioned above are made up of the remaining symbols except the symbols of the contents already received before the SMD management performs the content recovery step.

In other words, the SMD center may ignore the part (symbol) of the content that was sent before the content recovery step and resend the entire content by performing the content recovery step, or the content that was transferred until the content recovery step was performed. You can also retransmit from the next part (symbol) following the part of (symbol).

As such, the criterion for determining whether the retransmission content to be transmitted to the SMD management unit is the total retransmission content or the partial retransmission content is specified in the content retransmission request message received from the SMD management unit or the symbol of the content transmitted by the SMD center to the SMD management unit. The sequence is determined based on the checked information.

In the DCD / BCMCS interworking system, the method for transmitting content to the standby screen of the terminal is to send a content transmission flow start notification message to the BSM (Base Station Management) system that the SMD center starts a procedure for transmitting the content to the SMD management unit in the terminal. The content transmission flow start notification step of transmitting may further include.

The base station management (BSM) system mentioned above performs a bearer path setting function of a network for transmitting contents to the SMD management unit in the terminal.

In the method for transmitting content to the idle screen of the terminal in the DCD / BCMCS interworking system, the above-described content download step (S 700) is performed when the DCD server transmits information on whether to apply the content recovery function for the content and the content to the SMD center. You can also additionally send Response Time Out information, which indicates the available time to receive the download result report message for the content to be received from the SMD center, and the DCD server downloads the result within the response time limit (RTO) from the SMD center. If the report message is not received, the DCD server retransmits the content to the DCD client of the terminal.

In summary, the content transmitted from the DCD server is guaranteed to be reliably transmitted to the DCD client by interworking between the SMD center and the SMD management unit in the terminal. As a reliable transmission method, a download result reporting method and a retransmission method are used.

As for the download result reporting method, the SMD management unit in the terminal ensures reliable transmission by transmitting a download result report message to the DCD server through the SMD center when the content is completely downloaded (transmitted). You will. The reliable content transmission method by the download result reporting method will be described in detail with reference to FIG. 8.

As for the retransmission method, there are two retransmission methods including retransmission at the SMD center and retransmission at the DCD server.

Regarding the method of retransmission in the SMD center stage, if the SMD management unit in the terminal has not completely downloaded (transmitted) the content, it is reliable by downloading (transmitted) the retransmitted retransmitted content for the content through a content recovery request. To ensure the correct transmission. The reliable content transmission method by the retransmission method in the SMD center stage will be described in detail with reference to FIG. 9.

As for the method of retransmission in the DCD server side, it means that the DCD server received the content well within the response time limit (RTO) based on the response time out information transmitted when the content was sent to the SMD center. If the download result report message is not received, the DCD server retransmits the content directly to the DCD client of the terminal to ensure reliable transmission. This ensures reliable transmission. The reliable content transmission method by the method of retransmission in the DCD server side will be described in detail with reference to FIG.

In addition, the recovered content, that is, the content to be resent, is managed by dividing the entire content by ignoring the portion that has already been transmitted before retransmission and by resending some contents from the next portion of the portion that was transmitted before the retransmission. Can improve.

In addition, the content recovery function may also transmit information on whether the content recovery function is applied when the DCD server transmits the content to the SMD center, thereby determining whether to use the content retransmission function according to the content characteristics, the terminal status, or the network status. Improve the efficiency of content delivery.

8 is a flowchart of content transmission in a positive download state according to a preferred embodiment of the present invention.

FIG. 8 is a flowchart illustrating a download result reporting method among methods for ensuring reliable content transmission to a DCD client by interworking between a SMD center and an SMD management unit in a terminal with respect to content transmitted from a DCD server, and reliability of the download result reporting method. The guaranteed delivery method is performed when the download state is positive.

Referring to FIG. 8, the download result reporting method for ensuring reliable content transmission from the DCD server to the DCD client includes transmitting information to the SMD center from the DCD server, including information on whether the content recovery function is applied to the SMD center (S 800). ), The SMD center transmits a content transmission flow start notification message to the BSM indicating that the procedure for transmitting the content to the SMD management unit in the terminal is started (S802), and the BSM of the network for transmitting the content to the SMD management unit in the terminal. Perform a bearer path setting function (S804), after the bearer path is established, the SMD center transmits the content to the SMD management unit in the terminal (S806), and detects the download state of downloading (receiving) the content. In operation S808, if the determined download state is a positive state, the SMD management unit transmits the content to the DCD client in the terminal. (S 810), and the SMD management unit transmits a download result report message to the DCD server through the SMD center (S 812) to inform that the terminal has downloaded the content in a positive state (normal state) (S 812). )do.

9 is a flowchart of content transmission including content recovery in a negative download state according to a preferred embodiment of the present invention.

FIG. 9 is a flowchart illustrating a method of retransmitting at the SMD center stage among the methods for ensuring reliable content transmission to the DCD client by interworking between the SMD center and the SMD management unit in the terminal with respect to the content transmitted from the DCD server. The reliable transmission guarantee method by the retransmission method is performed when the download state is negative.

Referring to FIG. 9, the method of retransmitting at the SMD center stage to ensure reliable content transmission from the DCD server to the DCD client includes transmitting the content to the SMD center to the SMD center, including information on whether to apply the content recovery function. (S 900), the SMD center transmits a content transmission flow start notification message indicating that the procedure for transmitting the content to the SMD management unit in the terminal is started to the BSM (S 902), and the BSM transmits the content to the SMD management unit in the terminal. Perform a bearer path setting function of the network for the network (S904), and after the bearer path is established, the SMD center transmits the content to the SMD management unit in the terminal (S906) and downloads (receives) the content. Detect and determine (S 908) and assuming that the determined download state is negative, the SMD management unit retransmits the content to the SMD center. In order to receive the content resend request message (S 910), the SMD center receiving the content resend request message receives a content recovery mechanism for determining whether to resend the entire content or some content (the unsent part) for the content. In operation S912, the SMD center transmits retransmission content to the SMD management unit in the terminal in operation S914. Accordingly, the SMD management unit detects and determines the download status in operation S916, and finally, the determined download state is positive. (Positive), the SMD manager delivers the resent content to the DCD client in the terminal (S 918), and the SMD manager sends a download result report message to inform the terminal that the terminal has downloaded the content in a positive state (normal state). It transmits to the DCD server through the SMD center (S 920) (S 922).

10 is a flowchart of content retransmission when a download result report message is not received within a response time limit according to an exemplary embodiment of the present invention.

FIG. 10 illustrates a method of retransmitting at the DCD server side. If the DCD server transmits the content to the SMD center, the method transmits the content within the response time limit (RTO) based on response time out information transmitted together with the DCD server. If a download result report message is not received, which means that it was well received, the DCD server retransmits the content directly to the DCD client of the terminal to ensure reliable content transmission.

Response Time Out information means the time when the DCD server can receive the download result report message for the corresponding content to be received from the SMD center. The DCD server does not receive the content until the download result report message is received within the response time limit. Is determined to be well transmitted to the terminal.

Referring to FIG. 10, in the method of retransmitting at the SMD center stage to ensure reliable content transmission from the DCD server to the DCD client, the DCD server transmits the response timeout information 1100 together with the content to the SMD center. If the download result report message is not received within the response time limit 1100 (S 1002), the content is retransmitted directly to the DCD client (S 1004).

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, the present invention is applied to a dynamic content transmission (DCD) technology for transmitting content to a standby screen of a terminal, and includes a wireless network and a state of a terminal, a DCD server, an SMD center, etc., which may occur during content transmission. In spite of the deterioration of the network condition, as a reliable transmission guarantee method, it is effective to guarantee the reliable content transmission to the terminal by using the download result reporting method and the retransmission method, thereby providing a satisfactory content transmission service to the user. It is a very useful invention that has the effect of increasing the economic profitability for the service provider or the content provider.

1 is a view showing a conventional DCD system for providing a content transmission function to the terminal idle screen;

2 is a diagram illustrating a conventional BCMCS system for providing a content transmission function to a terminal;

3 is a diagram illustrating a DCD / BCMCS interworking system for providing a content transmission function to the terminal idle screen in the DCD / BCMCS interworking system according to a preferred embodiment of the present invention;

4 is a view showing a DCD server in a DCD / BCMCS interworking system for providing a content transmission function to the terminal idle screen in the DCD / BCMCS interworking system according to a preferred embodiment of the present invention;

FIG. 5 is a view showing an SMD center in a DCD / BCMCS interworking system for providing a content transmission function to a terminal idle screen in the DCD / BCMCS interworking system according to an embodiment of the present invention; FIG.

FIG. 6 is a view illustrating an SMD management unit in a terminal in a DCD / BCMCS interworking system for providing a content transmission function to a terminal idle screen in the DCD / BCMCS interworking system according to an embodiment of the present invention; FIG.

7 is a flowchart illustrating a content transmission to a terminal idle screen in a DCD / BCMCS interworking system according to a preferred embodiment of the present invention;

8 is a flowchart of content transmission in a positive download state according to a preferred embodiment of the present invention;

9 is a flow diagram illustrating a content transfer including a content recovery step in a negative download state according to a preferred embodiment of the present invention;

10 is a flowchart of content retransmission when a download result report message is not received within a response time limit according to an exemplary embodiment of the present invention.

Description of the Related Art

300: terminal

310: DCD Client

320: SMD management unit

330: network

340: SMD Center

350: DCD server

Claims (28)

Receives the content and transmits it to the external device, and when receiving the download result report message for the content from the external device, and transmits it to the external server, when receiving the content retransmission request message from the external device, from the external server An SMD center for transmitting the received retransmission content to the external device; Represents the content received from the SMD center as a standby screen using a mounted DCD application, and if the download state of the content is a positive state, generates the download result report message and transmits it to the SMD center, A terminal for generating the content retransmission request message and transmitting the content retransmission request message to the SMD center to receive the retransmission content corresponding to the content retransmission request from the SMD center when the content download state is negative; And Transmitting the stored content to the SMD center, receiving the download result report message from the SMD center, and receiving the content retransmission request message from the SMD center, and retransmitting the content corresponding to the content retransmission request message. A dynamic content delivery (DDC) server that transmits the content or the retransmission content directly to the terminal based on a response time out information for the download result report message; DCD / BCMCS interworking system for transmitting content to the terminal idle screen, characterized in that it comprises a. The method of claim 1, The SMD center is The DCD / BCMCS interworking system for storing the content received from the DCD server, and deletes the previously stored content when receiving the download result report message from the terminal. delete delete The method of claim 1, A base station management system that performs a bearer path setting function of a network for transmitting the content to the terminal. DCD / BCMCS interworking system for transmitting content to the terminal idle screen, characterized in that it further comprises. 6. The method of claim 5, The BSM system, DCD for transmitting content to the terminal idle screen after receiving a content transmission flow start notification message indicating that the procedure for transmitting the content to the terminal starts from the SMD center. / BCMCS interworking system. delete delete delete delete delete In the method for transmitting content, (a) a content downloading step of receiving, by an SMD center, the content received from the DCD server and information on whether to apply a content recovery function to the content via a terminal; (b) a content download state detection step of detecting a download state of the content in the terminal; (c) a content download state determination step of determining, by the terminal, whether the download state is a positive state or a negative state; (d) if the download state determined in step (c) is the positive state, delivers the content from the terminal to the DCD client, and downloads the content to the DCD server via the SMD center; A content download result reporting step of sending a report message; (e) a content recovery step of receiving retransmission content of the content by requesting retransmission of the content from the terminal to the SMD center if the download state determined in step (c) is the negative state; (f) a content retransmission step of transmitting the retransmission content corresponding to the content retransmission request message to the SMD center when the DCD server receives the content retransmission request message via the SMD center; And (g) receiving the download result report message from the SMD center at the DCD server and directly sending the content or the retransmission content to the terminal based on response time out information for the download result report message; Steps to ensure the reliability of the content you deliver Method for transmitting content to the terminal idle screen in the DCD / BCMCS interworking system comprising a. 13. The method of claim 12, The content is, A method for transmitting content to a terminal idle screen in a DCD / BCMCS interworking system, characterized in that the transmission is divided by a symbol unit. 14. The method of claim 13, The download state in the step (b), The negative state in which the SMD center receives all of the symbols included in the content and receives only some symbols of all the symbols in the content. Method for transmitting content to the terminal idle screen in the DCD / BCMCS interworking system comprising a. 13. The method of claim 12, In step (e), And the download state is the negative state, and the content recovery function application information is set to on. The method of claim 1, wherein the DCD / BCMCS interworking system transmits the content to the terminal idle screen. 13. The method of claim 12, The step (a) And the SMD center stores the received content from the DCD server to the terminal idle screen in the DCD / BCMCS interworking system. 17. The method of claim 16, The content stored in the SMD center in the step (a), And in the step (d), the SMD center is deleted when the SMD center receives the download result report message from the terminal. 13. The method of claim 12, The content recovery step in the step (e), (e1) a content recovery request step of transmitting a content retransmission request message for the content from the terminal to the SMD center; (e2) a retransmitted content download step of receiving the retransmitted content for the content from the SMD center in the terminal; (e3) detecting a retransmitted content download state of the retransmitted content download state of the retransmitted content in the terminal; (e4) a retransmission content download state determination step of determining, by the terminal, whether the detected retransmitted content download state is the positive state or the negative state; And (e5) If the retransmitted content download state determined in the step (e4) is the positive state, the retransmitted content is transmitted from the terminal to the DCD client and the DCD server is transmitted to the DCD server via the SMD center. A retransmission content download result report step of transmitting the download result report message for retransmitted content Method for transmitting content to the terminal idle screen in the DCD / BCMCS interworking system comprising a. 19. The method of claim 18, If the retransmitted content download state determined in the step (e4) is the negative state, the terminal idle screen in the DCD / BCMCS interworking system, wherein the content recovery step is repeated from the step (e1). How to transfer content to. 19. The method of claim 18, The retransmission content, The terminal idle screen in the DCD / BCMCS interworking system, characterized in that it is one of the total retransmission content including the entire symbol (Symbol) included in the content, and the partial retransmission content including some symbols (Symbol) included in the content. How to transfer content to. The method of claim 20, The partial retransmission content, The method of transmitting content to the terminal idle screen in the DCD / BCMCS interworking system, characterized in that the terminal consists of the remaining symbols (Symbol) except for the already received symbol (Symbol) before the content recovery step. The method of claim 20, The criterion for determining whether the retransmission content to be transmitted to the terminal by the SMD center is the total retransmission content or the partial retransmission content is: DCD / BCMCS interworking system characterized in that it is determined on the basis of the information specified in the content retransmission request message received from the terminal or the SMD center checks the symbol sequence of the content sent to the terminal How to transfer content from to terminal idle screen. 13. The method of claim 12, After the step (a), And a content delivery flow start notification step of transmitting, by the SMD center, a content delivery flow start notification message indicating that a procedure for transmitting the content to the terminal is started to a base station management (BSM) system. Content transmission method in the / BCMCS interworking system. 24. The method of claim 23, The BSM system receiving the content transmission flow start notification message, And a bearer path setting function of a network for transmitting the content to the terminal, wherein the content is transmitted to the terminal idle screen in the DCD / BCMCS interworking system. 13. The method of claim 12, The step (a) When the DCD server transmits the content and information on whether to apply a content recovery function for the content to the SMD center, the response indicating a reception time of the download result report message for the content to be received from the SMD center; A method for transmitting content to a terminal idle screen in a DCD / BCMCS interworking system, characterized in that additionally transmits response time out information. 26. The method of claim 25, The response time out information is Means that the DCD server can receive the download result report message for the content to be received from the SMD center, and the DCD server must receive the download result report message within the reception time for the response timeout information. And transmitting the content to the terminal idle screen in the DCD / BCMCS interworking system, wherein the content is determined to be transmitted to the terminal. 26. The method of claim 25, When the DCD server transmits the content and information on whether to apply a content recovery function for the content to the SMD center, the response indicating a reception time of the download result report message for the content to be received from the SMD center; If additional timeout information is sent, The DCD server retransmits the contents to the DCD client of the terminal when the DCD server does not receive the download result report message within the response time limit (RTO) from the SMD center; How to transfer content from to terminal idle screen. 13. The method of claim 12, The DCD server receiving the download result report message generates the charging data for the content content transmission method to the terminal idle screen in the DCD / BCMCS interworking system.

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