CN1933440A - Method for realizing file distributing of broadcasting system - Google Patents

Abstract

The invention discloses a method for realizing file distribution in a broadcasting system. After receiving a file request from a terminal through a broadcast service distribution/adaptation server, the method provided by the invention first judges whether the requested file is saved by itself, and if If the file is not saved, the broadcast service application server is requested to obtain the file, and then the subsequent file distribution process is carried out, which avoids the occurrence of file distribution failure caused by the broadcast service distribution/adaptation server not saving the file requested by the terminal, and improves The success rate of file distribution in the broadcast system.

Description

A method for broadcasting system to realize file distribution

technical field

The invention relates to the field of broadcasting services, in particular to a method for realizing file distribution in a broadcasting system.

Background technique

Broadcasting (BCAST) business is more and more welcomed by users, and has a very good development trend in the communication market. Open Mobile Alliance (OMA, Open Mobile Alliance) defines the basic system of the wireless digital broadcasting system, as shown in Figure 1, where the network side mainly includes:

Content creation (Content Creation) server, used to generate broadcast service content, and send basic service materials, service content attributes, etc. to broadcast service application (BSA, BCAST Service Application) server through BCAST-1 interface;

The BSA server is used to send broadcast services to the broadcast service distribution/adaptation (BSD/A, BCAST Service Distribution/Adaptation) server and the broadcast subscription management (BSM, BCAST Subscription Management) server through the BCAST-2 interface and the BCAST-3 interface respectively And business attributes; used to transmit information such as broadcast business interaction and reports to the terminal through the Interaction Network through the BCAST-8 interface; used to generate billing information, etc.;

The BSD/A server is used to receive and adapt broadcast services; it is used to perform service aggregation and service protection on broadcast services; it is used to adapt notification messages through the broadcast distribution system through the BCAST-5 interface (BDS, Broadcast Distribution System) to the terminal, or to the terminal through the interactive network through the BCAST-6 interface; used to send the broadcast service to the BDS service distribution server through the BDS-1 interface;

The BSM server is used to provide service subscription and payment operation functions, and is used to manage broadcast network equipment, and is used to transmit information such as notifications, service guides, and service keys to the BSD/A server through the BCAST-4 interface; Service subscription, service key, etc. are sent to the terminal through the interactive network through the BCAST-7 interface, or sent to the BDS service distribution server through the BDS-2 interface;

BDS, used to send the received broadcast service content to a certain distribution system of the terminal through the BCAST-5 interface;

An interactive network, used to provide an interactive channel for the terminal and the broadcast network;

The BDS service distribution server is used to adjust the broadcast service and send it to the BDS through the x-1 interface. The BDS service distribution server may not exist in some BDSs; it can communicate with the interactive network through x-2, x-5, x -6 interface cooperates to realize service discovery, service protection, etc.; it can work with BDS through x-1, x-3, x-4 interfaces to send broadcast service content to terminals.

In addition, the broadcast system also includes: a terminal, used for receiving broadcast service content and the like. It can directly interact with the broadcast network through the interactive channel provided by the interactive network.

File distribution means that a broadcast network binds a file or a cluster of files and sends them to terminals through a two-way interactive channel or a one-way broadcast channel. File distribution is an important function of the broadcasting system, and it is not necessary to consider file types and file encodings during file distribution. In the broadcast system, the main functions in the file distribution process are: the file application (FA, File Application) module of the BSA server, the file delivery (FD, File Delivery) module of the BSD/A server, and the FD-client on the terminal (FD-C, FD-Client) modules, specifically, the main entities and interfaces that implement file distribution in the broadcast system are shown in Figure 2:

The FA module is responsible for receiving files from the content provider server and responding, and then sending the received files and file attributes to the FD module of the BSD/A server;

The FD module is responsible for receiving files from the FD-2 interface and responding, then aggregates and adapts the received files, and finally sends the files on the broadcast channel of BDS, or through the interactive channel of the interactive network, or to BDS business distribution server;

The FD-C module, located on the terminal, is responsible for ensuring that the terminal receives the file correctly, for example: reporting the receiving status of the file to the broadcast network through the interactive channel;

The FD-1 interface is used to send the file of the content providing server to the FA module of the BSA server;

FD-2 interface, used to send the encrypted files and file attributes of the FA module to the FD module of the BSD/A server;

The FD-4 interface is used to transmit the message to be sent by the BSM server on the FD-5 or FD-6 interface to the FD module of the BSD/A server;

The FD-5 interface is used to provide BDS with a service channel for one-way transmission of files or content; for BDS to provide a service channel for one-way transmission of in-band signaling;

FD-6 interface, used to send some files sent by the FD module to the terminal through the FD-5 interface, but not received by the terminal;

The FD-B1 interface is used to send a file or a group of files of the FD module to the BDS service distribution server, and then the BDS service distribution server distributes the file or the group of files; A file or a group of files of attributes is sent to the BDS service distribution server, so that the BDS service distribution server can determine the transmission bearer channel of the file.

The above Fig. 2 is a structural block diagram of the broadcast system realizing file distribution, and Fig. 3 is a flow chart of the broadcast system realizing file distribution in the prior art, as shown in Fig. 3, its specific steps are as follows:

Step 301: The FD-C module on the terminal initiates a file request to the FD module on the BSD/A server, and the request message carries a file identifier.

The FD-C module can request a file, or multiple files, or a part of a file, or any combination of the above three.

Step 302: After the FD module receives the file request, according to the file identifier carried in the request message, configure the file corresponding to the file identifier, and after the configuration is completed, initiate a request to the BDS service distribution server for assigning a bearer channel for file transmission, and the request message carries the file Attributes.

The file configuration information is provided to the FD module by the service subscription function of the BSM server, and file attributes include file bandwidth, etc.

After receiving the file request, the FD module may return a file response to the FD-C module.

Step 303: After receiving the request for assigning a file transfer bearer channel, the BDS service distribution server forwards the request to the interactive network.

Step 304: After receiving the request for assigning a bearer channel for file transfer, the interactive network assigns a bearer channel for file transfer according to the file attribute carried in the request message, and then returns a response message for assigning a bearer channel for file transfer to the BDS service distribution server. The response message carries information about the assigned file transfer bearer channel.

Step 305: After receiving the assigned file transfer bearer channel response message, the BDS service distribution server forwards the response message to the FD module.

Step 306: After receiving the assigned file transfer bearer channel response message, the FD module sends a file transfer start notification to the BDS service distribution server.

Before the FD module sends the file transfer start notification to the BDS service distribution server, it can perform service protection on the files to be sent.

Step 307: After receiving the file transmission start notification, the BDS service distribution server forwards the notification to the FD-C module.

The BDS service distribution server can directly forward the file transmission start notification to the FD-C module, or forward it to the interactive network first, and then the interactive network forwards it to the FD-C module.

After receiving the file transmission start notification sent by the FD module, the BDS service distribution server may return a file transmission start response to the FD module.

After receiving the file transmission start notification sent by the FD module, the interactive network may return a file transmission start response to the FD module.

Step 308: the FD module sends the file to the FD-C module through the assigned file transmission bearer channel.

The FD module can directly send the file to the FD-C module; it can also send the file to the interactive network first, and then forward the file to the FD-C module by the interactive network.

Before the interactive network sends the file, the file can be protected for business.

It can be seen that there must be a prerequisite for the success of the above process: the file requested by the FD-C module is stored on the BSD/A server. But in practice, due to reasons such as file content timeout, when the FD-C module requests the file, the file requested by the FD-C module may not exist on the BSD/A server, resulting in the failure of file distribution this time.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for broadcasting system to realize file distribution, so as to improve the success rate of file distribution.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A method for broadcasting system to realize file distribution, the method comprising:

A. After the BSD/A server receives the file request sent by the terminal, it judges whether it has saved the file requested by the terminal, and if so, executes step B; otherwise, requests the file from the BSA server, and the BSA server receives the request , return the requested file to the BSD/A server, and the BSD/A server executes step B after receiving the file;

B. The BSD/A server distributes files.

After the BSA server described in step A receives the request, before returning the requested file to the BSD/A server, it further includes: the BSA server encrypts the file;

The step B specifically includes: the BSD/A server sends the encrypted file to the terminal, and the terminal performs a decryption operation after receiving the file.

The BSA server performing an encryption operation on the file specifically includes:

The BSA server generates a series of masks according to the business key of the file saved by itself and the pre-defined encryption algorithm, and then performs XOR operation on the mask and the content of the file to obtain the encrypted file;

The terminal decrypting the encrypted file specifically includes:

The terminal obtains the business key of the file from the broadcast subscription management server, and then generates a series of masks according to the business key and the encryption algorithm saved by itself, and performs XOR operation on the mask and the encrypted file content to obtain the decryption after the file.

The BSD/A server in step A receives multiple files from the BSA server, and,

After the BSD/A server receives the file, before performing the step B, it further includes: the BSD/A server performs file aggregation on the file;

The file distribution by the BSD/A server in step B is as follows: the BSD/A server distributes the aggregated files.

When the BSA server described in step A returns the requested file to the BSD/A server, it further includes:

The BSA server returns the attributes of the file to the BSD/A server;

Described step B specifically comprises:

The BSD/A server sends a request for assigning a file transfer bearer channel to the interactive network. After receiving the request, the interactive network assigns a file transfer bearer channel according to the file attributes carried in the request, and returns the assigned file transfer bearer channel to the BSD/A server. The BSD/A server sends the file to the terminal through the assigned file transmission bearer channel after receiving the information.

Compared with the prior art, after the method provided by the present invention receives the file request sent by the terminal through the BSD/A server, it first judges whether it has saved the requested file, if not, then requests the BSA server to obtain the requested file. Describe the file, and then proceed to the subsequent file distribution process, avoiding the failure of file distribution caused by the BSD/A server not saving the file requested by the terminal, and improving the success rate of file distribution in the broadcast system.

Description of drawings

Figure 1 is a basic system diagram of a wireless digital broadcasting system;

Fig. 2 is a structural diagram of broadcasting system realizing file distribution;

Fig. 3 is the flowchart of file distribution realized by the broadcasting system in the prior art;

FIG. 4 is a flow chart of file distribution implemented by the broadcast system provided by the present invention;

FIG. 5 is a flow chart of a specific embodiment of file distribution implemented by the broadcast system provided by the present invention.

Detailed ways

The core idea of the present invention is: after receiving the file request sent by the terminal, the BSD/A server first judges whether it has saved the requested file, if not, then requests the BSA server to obtain the file, and then proceeds to follow-up File distribution process.

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 4 is the flowchart that the broadcasting system provided by the present invention realizes file distribution, as shown in Fig. 4, its specific steps are as follows:

Step 401: The BSD/A server receives a file request sent by a terminal, and the request message carries a file identifier.

Step 402: The BSD/A server judges whether it has saved the file corresponding to the file identifier carried in the file request message, and if so, executes step 405; otherwise, executes step 403.

Step 403: the BSD/A server sends a file request to the BSA server, and the request message carries a file identifier.

Step 404: After receiving the file request, the BSA server sends the file corresponding to the file identifier carried in the request message to the BSD/A server.

Step 405: The BSD/A server starts the file distribution process.

Fig. 5 is the flow chart of the specific embodiment that the broadcasting system provided by the present invention realizes file distribution, as shown in Fig. 5, its specific steps are as follows:

Step 501: After the FD module on the BSD/A server receives the file request sent by the FD-C module on the terminal, determine whether the BSD/A server has saved the file corresponding to the file identifier carried in the request message, and if so, perform the steps 504; otherwise, go to step 502.

After receiving the file request, the FD module may return a file response to the FD-C module.

Step 502: the FD module sends a file request to the FA module on the BSA server, and the request message carries a file identifier.

Step 503: After receiving the file request, the FA module sends the file and file attributes corresponding to the file identifier carried in the request message to the FD module.

Before sending the file, the FA module can encrypt the file. The specific process is as follows: the FA module generates a series of masks by using the predefined encryption algorithm saved by itself and the business key corresponding to the file saved by itself. The file obtained after the XOR operation of the mask and the file content is sent to the FD module. The FD-C module on the terminal needs to decrypt the file after receiving the file sent by the FD module. The pre-defined encryption algorithm and the business key generate a series of masks, and the XOR operation is performed on the masks and the file content to obtain the correct file content. Here, the FD-C module can obtain the file ID in two ways: one is from the FD module, that is, the FD module sends the file ID to the FD-C module at the same time; the other is from the BSD/A It can be obtained from the service guide sent by the server, that is, the service guide distribution module on the BSD/A server carries the identification of the file distributed this time in the service guide sent to the terminal before the file distribution starts.

If there are multiple files sent by the FA module, the FD module can perform file aggregation on the multiple files to form a cluster of files.

Step 504: The FD module initiates a request to the BDS service distribution server for assigning a bearer channel for file transmission, and the request message carries file attributes.

Steps 505-510 are exactly the same as steps 303-308.

The above descriptions are only process and method embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (5)

1, a kind of broadcast system is realized the method for file distributing, it is characterized in that this method comprises:

A, broadcasting service distribution/adaptation services device judge whether self has preserved the file of terminal request after receiving the file request that terminal sends, if, execution in step B; Otherwise, to the described file of broadcasting service application server request, after the broadcasting service application server is received described request, return the file of being asked to broadcasting service distribution/adaptation services device, after broadcasting service distribution/adaptation services device is received described file, execution in step B;

B, broadcasting service distribution/adaptation services device carry out file distributing.

2, the method for claim 1, it is characterized in that, the described broadcasting service application server of steps A is received after the described request, before broadcasting service distribution/adaptation services device returns the file of being asked, further comprise: the broadcasting service application server carries out cryptographic operation to described file;

Described step B specifically comprises: the file of broadcasting service distribution/adaptation services device after with described encryption sends to terminal, after terminal is received this document, is decrypted operation.

3, method as claimed in claim 2 is characterized in that, described broadcasting service application server carries out cryptographic operation to described file and specifically comprises:

The broadcasting service application server produces a series of masks according to the business cipher key and the predefined cryptographic algorithm of this document of self preserving, then this mask and file content is carried out XOR, the file after obtaining encrypting;

Described terminal is decrypted operation to the file after encrypting and specifically comprises:

Terminal according to the cryptographic algorithm of this business cipher key and self preservation, produces a series of masks then from the business cipher key of broadcasting subscribed manage server gains this document, and the file content after this mask and the encryption is carried out XOR, the file after obtaining deciphering.

4, the method for claim 1 is characterized in that, the described broadcasting service distribution/adaptation services of steps A device receives that the number of the described file that the broadcasting service application server sends is a plurality of, and,

Broadcasting service distribution/adaptation services device is received and before the execution in step B, further comprised after the described file: broadcasting service distribution/adaptation services device carries out the file polymerization to described file;

The described broadcasting service distribution/adaptation services of step B device carries out file distributing and is: the file of broadcasting service distribution/adaptation services device after to polymerization carries out file distributing.

5, the method for claim 1 is characterized in that, the described broadcasting service application server of steps A further comprises when broadcasting service distribution/adaptation services device returns the file of being asked:

The broadcasting service application server returns the attribute of described file to broadcasting service distribution/adaptation services device;

Described step B specifically comprises:

Broadcasting service distribution/adaptation services device sends the assignment file to the Internet and transmits the bearer path request, after the Internet is received this request, the file attribute that carries according to this request, file of assignment transmits bearer path, and transmit bearer path information to the file that broadcasting service distribution/adaptation services device returns institute's assignment, after broadcasting service distribution/adaptation services device is received this information, the file of described file by assignment transmitted bearer path send to terminal.

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