CN101282448B - Method for transmitting and receiving multimedia broadcast data as well as system and terminal thereof - Google Patents

Abstract

The invention discloses a multimedia broadcast data transmission method, receiving method, transmission system and terminal. In the method of the invention, the generated electronic program list includes the description information of the data file, the service identification corresponding to the data file and the transmission identification, and send the electronic program guide on the multimedia broadcast channel; in the process of transmitting multimedia broadcast data, the data file and the transmission identification corresponding to the data file are carried in the data unit of the multiplexing subframe data segment, and The multiplexed subframe is sent on a multimedia broadcast channel. The present invention can also not carry the transmission identification in the generated electronic program list, but in the process of transmitting the multimedia broadcast data, generate a data broadcast file list including the corresponding relationship between the transmission identification and the data file, and carry it together with the multimedia broadcast data on the complex sent to the terminal in subframes. By adopting the invention, the transmission and reception of multimedia broadcast data in the CMMB system can be realized.

Description

Multimedia Broadcasting Data Transmission and Reception Method, System and Terminal

technical field

The invention relates to the field of wireless communication, in particular to a transmission method and a reception method of multimedia broadcast data, a transmission system and a terminal of multimedia broadcast data.

Background technique

Mobile multimedia broadcasting has become a hot development hotspot at present. The mobile multimedia broadcasting service refers to receiving radio and television program viewing and information services anytime, anywhere on a mobile handheld terminal through satellite and terrestrial wireless broadcasting.

CMMB (China Mobile Multimedia Broadcast, China Mobile Multimedia Broadcasting) technology is the industry standard of China Mobile Multimedia Broadcasting System officially promulgated by the State Administration of Radio, Film and Television of China. The CMMB system uses high-power S-band satellite signals to cover the whole country, uses ground supplementary transponders to forward satellite signals at the same frequency and content at the same time to cover satellite signal blind spots, and uses wireless mobile communication networks to build return channels, thus forming a large area of satellite coverage. The main and terrestrial supplementary networks are a mobile multimedia broadcasting network with seamless coverage and a combination of one-way broadcasting and two-way interaction.

The current protocol stack of the CMMB technology system is shown in Table 1.

Table 1

In CMMB, the physical layer divides each second into 40 time slots, each time slot is 25ms. Channels are divided into control logic channel CLCH and service logic channel SLCH. The control logic channel always occupies time slot No. 0, and each service logic channel occupies one or more consecutive time slots.

The basic unit of transmission for each channel is the multiplexing frame. A multiplex frame consists of a multiplex frame header, a multiplex payload, and padding. The structure of the multiplexing frame and the multiplexing frame header is shown in Fig. 1 .

The multiplexing subframe of the CMMB is divided into an audio segment, a video segment and a data segment, wherein the structure of the data segment is shown in FIG. 2 .

Currently, there is no mechanism for the CMMB system to transmit data content on the broadcast channel.

Contents of the invention

One embodiment of the present invention provides a kind of transmission method of multimedia broadcast data, to realize transmission multimedia broadcast data in CMMB system, this method comprises the following steps:

Apply for a service channel for transmitting data files, and allocate a service identifier and a transmission identifier corresponding to the data file, wherein the service identifier is assigned according to the service channel information fed back by the multiplexing layer, and the transmission identifier determines the service according to the service identifier Channels can be assigned after they are acquired;

Generate an electronic program guide according to the description information of the data file, and the service identifier and transmission identifier corresponding to the data file, and multiplex the electronic program guide to the multimedia broadcast channel for transmission;

Carrying the data file and the transmission identifier corresponding to the data file in the data unit of the data segment of the multiplexed subframe, the multiplexed subframe corresponds to the service identifier of the data file, and the The multiplexed subframe is sent on the service channel corresponding to the service identifier.

Another embodiment of the present invention provides a kind of receiving method of multimedia broadcast data, to realize receiving multimedia broadcast data in CMMB system, this method comprises the following steps:

According to the data content selected by the user, the terminal obtains the corresponding data file information from the electronic program guide, and the service identifier and transmission identifier corresponding to the data file; the terminal obtains the obtained service identifier from the multimedia broadcast channel. Receiving the multiplexed subframe corresponding to the service identifier; the terminal obtains the transmission identifier from the data unit of the data segment of the multiplexed subframe, and judges whether the transmission identifier matches the transmission identifier obtained from the electronic program guide , if it matches, the data unit is received.

Another embodiment of the present invention provides a multimedia broadcast data transmission system, the system includes: a data content generation module, an electronic program guide generation module, a control information generation module and a multiplexing module, wherein

A data content generation module, configured to receive original content data, generate a data file from the original content data, and send an instruction to the control information generation module; receive a service identifier corresponding to the data file from the control information generation module , assigning a transmission identifier to the data file, and sending the description information of the data file, and the service identifier and the transmission identifier corresponding to the data file to the electronic program guide generation module; The service identification and transmission identification corresponding to the data file are sent to the multiplexing module;

The control information generating module is configured to apply for a service channel resource to the multiplexing module according to the request for applying for a service channel sent by the data content generating module, and generate the corresponding data file corresponding to the data file according to the allocation information fed back by the multiplexing module. A service identifier, and sending the service identifier to the data content generation module;

The electronic program guide generation module is used to receive the description information of the data file, and the service identification and transmission identification corresponding to the data file, generate an electronic program guide, and send it to the multiplexing module;

A multiplexing module, configured to multiplex the received electronic program guide onto a multimedia broadcast channel for transmission; carry the data file and the transmission identifier corresponding to the data file in the data of the multiplexing subframe data segment The multiplexing subframe corresponds to the service identifier of the data file, and sends the multiplexing subframe on the service channel corresponding to the service identifier.

Another embodiment of the present invention also provides a terminal, the terminal includes:

A receiving unit, a matching judging unit, a cache unit and an integrity judging unit, wherein

The receiving unit is used to receive the information sent on the multimedia broadcast channel, and the receiving unit includes a control information receiving subunit, a program list receiving subunit and a multiplexing subframe receiving subunit;

The control information receiving subunit is configured to receive control information from the control logic channel in the multimedia broadcast channel, and send the received control information to the program guide receiving subunit, the control information indicates the transmission of the electronic program guide aisle;

The program guide receiving subunit is configured to receive the electronic program guide according to the received control information, and obtain the corresponding data file information and the corresponding data file information from the electronic program guide according to the data content selected by the user. A service identifier and a transmission identifier, and sending the service identifier to the multiplexing subframe receiving subunit, and sending the transmission identifier to the matching judgment unit;

The multiplexing subframe receiving subunit is configured to receive the corresponding multiplexing subframe according to the received service identifier, and send a judgment instruction to the matching judging unit;

A matching judging unit, configured to obtain the carried transmission identifier from the data unit of the multiplexed subframe data segment received by the multiplexed subframe receiving subunit, and judge whether the transmission identifier is consistent with the subframe received from the program list. Whether the transmission identifier received by the unit matches, and if it matches, the data unit is sent to the buffer unit;

a cache unit, configured to receive and cache the data unit sent by the matching judging unit;

The integrity judging unit is configured to, after receiving the header information of the data unit sent by the matching unit, judge whether the data file selected by the user has been completely received according to the information, and if so, save the data file in the cache unit The cached data unit is restored as a data file; otherwise, an instruction is sent to the matching judgment unit, instructing the matching judgment unit to continue to perform matching judgment processing on other data units.

In the above-mentioned embodiment of the present invention, since the transmission identifier corresponding to the data file is included in the electronic program guide when generating the electronic program guide, the terminal can obtain the transmission identifier corresponding to the selected downloaded data file from the electronic program guide , and receive data units that match the transport identifier. In addition, in the above-mentioned embodiment, the data transmission in the multimedia broadcasting channel is realized by adopting the transmission mode of carrying the data file in the data unit of the data segment of the multiplexed subframe.

Another embodiment of the present invention provides a kind of transmission method of multimedia broadcast data, to realize transmission multimedia broadcast data in CMMB system, this method comprises the following steps:

Apply for a service channel for transmitting data files, and allocate a service identifier and a transmission identifier corresponding to the data file, wherein the service identifier is assigned according to the service channel information fed back by the multiplexing layer, and the transmission identifier determines the service according to the service identifier Channels can be assigned after they are acquired;

Generate an electronic program list according to the description information of the data file and the service identifier corresponding to the data file, and multiplex the program list onto a multimedia broadcast channel for transmission;

Generate a data broadcast file list, which includes the correspondence between data files and transmission identifiers;

The data broadcast file list is carried in the multiplexing subframe, and the data file and the transmission identification corresponding to the data file are carried in the data unit of the data segment of the multiplexing subframe, and the multiplexing subframe The frame corresponds to the service identifier of the data file; and the multiplexed subframe is sent on the service channel corresponding to the service identifier.

Another embodiment of the present invention provides a multimedia broadcast data transmission system, the system includes: a data content generation module, an electronic program guide generation module, a control information generation module and a multiplexing module, wherein

A data content generation module, configured to receive original content data, generate a data file from the original content data, and send an instruction to the control information generation module; receive a service identifier corresponding to the data file from the control information generation module , and send the description information of the data file and the service identifier corresponding to the data file to the electronic program guide generation module, and send the data file and the service identifier corresponding to the data file to the Reuse module;

The control information generating module is configured to apply for a service channel resource to the multiplexing module according to the request for applying for a service channel sent by the data content generating module, and generate the corresponding data file corresponding to the data file according to the allocation information fed back by the multiplexing module. A service identifier, and sending the service identifier to the data content generation module;

The electronic program guide generation module is used to receive the description information of the data file and the service identification corresponding to the data file, generate an electronic program guide, and send it to the multiplexing module;

A multiplexing module, configured to multiplex the received electronic program guide onto a multimedia broadcast channel for transmission; assign a transmission identifier to the data file; generate a data broadcast file list, which includes the correspondence between the data file and the transmission identifier Relation; the data broadcast file list is carried in the multiplexing subframe, and the data file and the transmission identification corresponding to the data file are carried in the data unit of the data segment of the multiplexing subframe, and the multiplexing subframe The subframe corresponds to the service identifier of the data file; and the multiplexed subframe is sent on the service channel corresponding to the service identifier.

Another embodiment of the present invention provides a kind of receiving method of multimedia broadcast data, to realize receiving multimedia broadcast data in CMMB system, this method comprises the following steps:

The terminal obtains the corresponding data file information and the service identifier corresponding to the data file from the electronic program guide according to the data content selected by the user;

The terminal receives the multiplexed subframe corresponding to the service identifier from the multimedia broadcast channel according to the obtained service identifier;

The terminal obtains the data broadcast file list carried by the multiplexed subframe from the multiplexed subframe, obtains the transmission identifier corresponding to the data content selected by the user from the list, and receives the multiplexed subframe data A data unit in a segment that matches the transport identifier.

Another embodiment of the present invention also provides a terminal, which includes: a receiving unit, a matching judging unit, a cache unit, and an integrity judging unit, wherein

The receiving unit is used to receive the information sent on the multimedia broadcast channel, and the receiving unit includes a control information receiving subunit, a program list receiving subunit and a multiplexing subframe receiving subunit;

The control information receiving subunit is configured to receive control information from the control logic channel in the multimedia broadcast channel, and send the received control information to the program guide receiving subunit, the control information indicates the transmission of the electronic program guide aisle;

The program guide receiving subunit is configured to receive the electronic program guide according to the received control information, and obtain the corresponding data file information and the corresponding data file information from the electronic program guide according to the data content selected by the user. A service identifier, and sending the service identifier to the multiplexing subframe receiving subunit;

The multiplexing subframe receiving subunit is configured to receive the corresponding multiplexing subframe according to the received service identifier, and send a judgment instruction to the matching judging unit;

A matching judging unit, configured to obtain a data broadcast file list from the multiplexed subframe received by the multiplexed subframe receiving subunit, and obtain a transmission identifier corresponding to the data content selected by the user from the list; Obtain the transmission identifier carried in the data unit of the multiplexed subframe data segment, and judge whether the transmission identifier matches the transmission identifier obtained from the list, and if they match, send the data unit to the cache unit;

a cache unit, configured to receive and cache the data unit sent by the matching judging unit;

The integrity judging unit is configured to, after receiving the header information of the data unit sent by the matching unit, judge whether the data file selected by the user has been completely received according to the information, and if so, save the data file in the cache unit The cached data unit is restored as a data file; otherwise, an instruction is sent to the matching judgment unit, instructing the matching judgment unit to continue to perform matching judgment processing on other data units.

In the above embodiment of the present invention, since the data broadcast file list including the correspondence between the data file and the transmission identifier is generated, and the list is carried with the data file in the data unit of the multiplexed subframe data segment, the terminal receives the multiplexed subframe frame time, according to the obtained data broadcast file list, the transmission identification of the data file selected for download can be obtained, and the data unit matching the transmission identification can be received. In addition, in the above-mentioned embodiment, the data transmission in the multimedia broadcasting channel is realized by adopting the transmission mode of carrying the data file in the data unit of the data segment of the multiplexed subframe.

Description of drawings

FIG. 1 is a schematic diagram of a multiplexing frame structure in CMMB in the prior art;

Fig. 2 is the schematic diagram of the multiplexing frame structure data segment in CMMB in the prior art;

Fig. 3 is a schematic structural diagram of the CMMB service layer system in Embodiment 1 of the present invention;

Fig. 4 is the structural representation of the data content generating module in the CMMB service layer system of the embodiment of the present invention;

Fig. 5 is the structural representation of multiplexing module in the CMMB business layer system of embodiment one of the present invention;

Fig. 6 is the schematic flow chart of the data transmission based on CMMB business layer system structure in the embodiment of the present invention;

7 is a schematic flow diagram of a terminal receiving data from a multimedia broadcast channel in Embodiment 1 of the present invention;

FIG. 8 is a schematic structural diagram of a terminal in Embodiment 1 of the present invention;

Fig. 9 is the structural representation of the multiplexing module in the CMMB business layer system of the embodiment of the present invention two;

Fig. 10 is the schematic flow chart of the data transmission based on CMMB business layer system structure in the embodiment of the present invention two;

FIG. 11 is a schematic flow diagram of a terminal receiving data from a multimedia broadcast channel in Embodiment 2 of the present invention;

FIG. 12 is a schematic structural diagram of a terminal in Embodiment 2 of the present invention.

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Embodiment one

This embodiment describes the method and system for transmitting data through the mobile multimedia broadcast channel in the CMMB system. In this embodiment, the process of transmitting data through the mobile multimedia broadcast channel in the CMMB system includes:

The network side generates an electronic program list and sends it to:

On the network side, according to the descriptive information of the file to be transmitted (such as title, file type, file size, etc.), the service identification corresponding to the file to be transmitted, and the transmission identification assigned to the file to be transmitted, etc., generate the EPG and data broadcasting information. related content, and multiplex the generated electronic program list to the broadcast channel for transmission;

The network side generates content data and sends it:

The network side obtains the original data of the data broadcast content, generates the data file to be transmitted, assigns a transmission identifier to the data file to be transmitted, subpackages the data file to be transmitted, and fills the data packet into the multiplexing subclass corresponding to the service identifier. The data unit of the data segment of the frame, and fill in the data unit head with the transmission identifier corresponding to the data file, and send the multiplexed subframe on the multimedia broadcast channel;

The terminal receives content data:

The terminal selects the content data from the electronic program guide, obtains the service identifier and transmission identifier corresponding to the selected content data from the electronic program guide, receives the multiplexed subframe corresponding to the service identifier from the multimedia broadcast channel, and reads the Multiplexing the transmission identifier of the data unit header of the data segment in the subframe, if the transmission identifier matches the transmission identifier obtained by the terminal from the electronic program guide, then receive the data unit and restore the received data unit to data files are provided to users.

The above data transmission process can be realized through the business layer system of the CMMB system.

Referring to Fig. 3, it is a schematic structural diagram of the CMMB service layer system in Embodiment 1 of the present invention. The CMMB service layer system includes a data content generation module, an electronic program guide generation module, a control information generation module and a multiplexing module.

The data content generation module is used to generate data broadcasting content. The data content generating module may include functional submodules as shown in Figure 4:

Receiving sub-module: used to receive the original data from the data content source, and identify the data type of the original data, and then use the corresponding encoding method to encode according to the data type of the original data to form a data file to be transmitted; the receiving sub-module receives After receiving the original data, send instructions to the service application sub-module, content data processing sub-module and electronic program guide information sending sub-module respectively;

Business application sub-module: used to apply to the control information generation module for a business channel for transmitting data content according to the instructions sent by the receiving sub-module; receive the business identification and business channel information returned by the control information generation module, and allocate the data files to be transmitted transmission identification;

The content data processing sub-module is used to sub-package the data file to be transmitted according to the instruction sent by the receiving sub-module, and send the data packet, and the service identification and transmission identification corresponding to the data file to the multiplexing module;

Electronic program guide information sending sub-module: used to obtain the transmission identification and service identification of the file to be transmitted from the service application sub-module according to the instruction sent by the receiving sub-module, and describe the obtained transmission identification, service identification and data file Information (such as subject, file type, size, etc.) is sent to the electronic program guide generation module.

The electronic program guide generation module is used to generate the electronic program guide according to the description information, service identification and transmission identification of the data file received from the data content generation module.

The control information generating module is used to apply for service channel resources from the multiplexing module according to the request for applying for a service channel sent by the data content generating module, and generate various control information tables and information related to the application according to the allocation information fed back by the multiplexing module. The service identifier corresponding to the data content, the control information generating module sends the generated service identifier to the content data generating module.

The multiplexing module constructs multiplexed frames from the content data generated by the data content generating module, the electronic program guide generated by the electronic program guide generating module, and the control information generated by the control information generating module, and sends them on the multimedia broadcast channel. The multiplexing module can include functional submodules as shown in Figure 5:

Receiving sub-module: used to receive the data packet sent by the data content generation module, as well as the corresponding service identification and transmission identification;

Data processing sub-module: used to fill the data packet received by the receiving sub-module into the data unit of the multiplexed subframe data segment corresponding to the service identifier, and generate the data unit header according to the transmission identifier and other information to ensure the transmission of the same data file the data units have the same data identifier;

Transmitting sub-module: used to encode, interleave, map, modulate, and frame the data processed by the data processing sub-module to form a transmitting signal and send it on the multimedia broadcast channel.

Referring to Fig. 6, it is the schematic flow sheet of the data transmission based on CMMB business layer system structure in the embodiment of the present invention one, and concrete steps comprise:

Step 1. The data content source transmits the content to be sent to the data content generation module, and the data content generation module recognizes and encodes the content sent by the data content source after receiving the content, and uses the corresponding encoding method to encode the original data according to the identified data type Encode to form a data file.

Step 2. After receiving the content sent by the data content source, the data content generating module applies to the control information generating module for a business channel for transmitting data content.

Step 3: The control information generating module applies for a service channel to the multiplexing module according to the request of the data content generating module for applying for a service channel.

Step 4: The multiplexing module sends a request to the physical layer of the broadcast network according to the request of the control information generating module to apply for a service channel, requesting to apply for a physical channel for transmitting services.

After the physical layer of the broadcast network completes the allocation of service physical channels, it will report the allocation information to the multiplexing layer.

Step 5, the multiplexing layer feeds back the allocated service channel information to the control information generation module.

Steps 6a-6b, the control information generation module assigns service identifiers (each service identifier corresponds to a service channel) for the data broadcasting service according to the service channel information fed back by the multiplexing layer, and sends the assigned service identifiers to the data content generation module. The control information generation module also generates a corresponding control information table, and sends the control information table to the multiplexing module.

The control information table generated by the control information generation module may include the following contents: the corresponding relationship between the service identifier and the service channel, the transmission channel where the EPG is located, and other control information.

Step 7: After receiving the service identifier, the data content generation module determines that the service channel is available, and assigns a transmission identifier to each data file to be transmitted.

Step 8, the data content generation module sends information such as the service identification, the descriptive information of the data file to be transmitted (such as the name of the data file, title, file type, file size), and the transmission identification of the file to be transmitted to the electronic program Single build module.

Step 9a-9b, the electronic program guide generating module generates electronic program guide information related to the data broadcasting service according to the above information provided by the data content generating module, and sends the generated electronic program guide to the multiplexing module, and the multiplexing module converts the electronic program guide Multiplexed to the multimedia broadcast channel, and finally sent to the terminal.

The electronic program guide generated by the electronic program guide generating module includes a business table, a content table, an arrangement information table, and an access table. The business table can be divided into business main table and business sub-table, and the content table can be divided into content main table and content sub-table. The record identifiers of the main table and the sub-table are the same, one-to-one correspondence. The main form and the subsidiary form are distinguished by the "e-Guide Data Identification" of the section where they are transferred.

The arrangement table corresponds to the business table and the content table respectively, and the business table corresponds to one or more access tables. Each table contains a record identifier, which uniquely identifies that record. Except for the record identification of the content table, which is 24 bits, the record identification of other tables is 16 bits. The business table records the corresponding relationship between the business identifier and the data file, the content table records the introduction information of the content, the arrangement table records the corresponding relationship between the data file and the transmission identifier, and the access table records how to access the content. The data structure of the arrangement table may be shown in Table 2.

Table 2

Step 10, the data content generating module sends the data file to the multiplexing module after sub-packaging and encapsulating. The data content generation module can also perform forward error correction calculation on the data packet as required.

Step 11, the multiplexing module encapsulates the data packet into the data unit of the data segment of the multiplexing subframe corresponding to the service identifier, and inserts the transmission identifier into the data unit as a data unit header.

One service identifier can correspond to multiple data files, and a data file may be divided into multiple data packets and encapsulated into multiple data units, but the transmission identifiers carried by the data units belonging to the same data file are all the same. The transfer identifier is the transfer identifier corresponding to the data file.

The data unit header of the multiplexed subframe data segment is generated by the multiplexing module according to the transmission identification and FEC (forward error correction) information provided by the data content generating module. Through the information terminal in the data unit header, the required data units can be filtered in the data segment. The data structure of the data unit header may be shown in Table 3.

table 3

A data unit includes 1 to n data packets, and the data structure of the packet headers of these data packets can be shown in Table 4.

Table 4

grammar illustrate Packet Header() { head length FEC-encoded packet identifier FEC-encoded packet identification for recovery during forward error correction Data length }

Step 12, the multiplexing module sends the multiplexing frame to the terminal through the service channel corresponding to the service identifier. At the same time, the multiplexing module sends corresponding control information through the logical control channel.

In the above process, if the service channel for transmitting service data has been determined before, the above steps 2-7 can be omitted.

In the above process, step 8 and step 10 do not have strict timing requirements, that is, the data content generation module sends information to the electronic program guide generation module, and the data content generation module performs two processes of data file subcontracting, there is no strict sequence .

Through the above process, after the network side generates the electronic program guide and content data, the user can select the data content to be downloaded according to the content of the electronic program guide, and receive the relevant multiplex sub-item according to the service identification and transmission identification obtained in the electronic program guide. The data unit in the frame to complete the file download.

Referring to FIG. 7 , it is a schematic flow diagram of a terminal receiving data from a mobile multimedia broadcast channel in Embodiment 1 of the present invention, and the specific steps include:

Step 101, the terminal obtains the transmission channel information of the EPG on the control logic channel of time slot 0, and receives the EPG from the designated transmission channel according to the information.

Step 102: The user selects the required data content from the electronic program guide, and the terminal obtains the data file corresponding to the selected data content and the service corresponding to the data file from the electronic program list according to the data content selected by the user. Identification and transmission identification.

The terminal program can know the transmission time of the data file selected by the user at the multiplexing layer, the transmission identifier and other information such as the size and type of the file through the arrangement table in the electronic program table (the data structure of the arrangement table is shown in Table 1). wait. The size, type and encoding method of the file are mainly used to prepare the terminal program to process the data file and find the relevant application program entry. The service identifier required by the terminal is obtained from the service table associated with the orchestration table.

Step 103, the terminal obtains the information of the transmission channel corresponding to the service identification according to the service identification corresponding to the selected data file, and receives the multiplexed subframe from the corresponding transmission channel.

Since the transmission channel corresponds to the service identifier, the received multiplexed subframe matches the service identifier corresponding to the data content selected by the user.

Step 104: After receiving the multiplexed subframe, the terminal reads the data units in the data segment of the multiplexed subframe.

Step 105, the terminal reads the transmission identifier in the header of the data unit, and judges whether the transmission identifier matches the transmission identifier obtained from the electronic program guide, and if it matches, executes step 106; otherwise, returns to step 104 and continues reading Multiplexing other data units in the subframe data segment.

Step 106: If the transmission identifier in the header of the data unit matches the transmission identifier obtained from the EPG, put the data unit in the buffer.

Step 107, the terminal judges whether all data units corresponding to the data content have been completely received, and if so, execute step 108; otherwise, return to step 104, and continue to read other data units in the multiplexed subframe data segment.

Whether a terminal judges whether a file has been received completely can be judged by FEC (forward error correction) data or the total number of data units of the file identified in the data unit header.

Step 108, the terminal recovers the data units in the cache area as data files, and provides them to the user.

The structure of the terminal that completes the above process may be as shown in FIG. 8 .

Referring to FIG. 8 , it is a schematic structural diagram of a terminal in Embodiment 1 of the present invention. The terminal includes: a receiving unit, a matching judging unit, an integrity judging unit, a data cache unit, and a data restoring unit.

The receiving unit is used for receiving information from the multimedia broadcast channel, and the receiving unit includes a control information receiving subunit, a program list receiving subunit and a multiplexing subframe receiving subunit. in,

The control information receiving subunit receives control information from the control logic channel in the multimedia broadcast channel, and sends the received control information to the program list receiving subunit. The control information indicates the channel for transmitting the electronic program list, such as service logic channel 1 ;

The program guide receiving subunit receives the electronic program guide from the service logic channel 1 for transmitting the electronic program guide according to the received control information; and obtains the corresponding data file information from the electronic program guide according to the data content selected by the user, and a service identifier and a transmission identifier corresponding to the data file, and send the service identifier to the multiplexing subframe receiving subunit, and send the transmission identifier to the matching unit;

The multiplexing subframe receiving subunit receives the multiplexing subframe from the corresponding service logical channel 2 according to the received service identifier, and then sends a judgment instruction to the matching judgment unit;

After the matching judging unit receives the judging instruction, it reads the transmission identifier carried in the data unit header of the multiplexed subframe data segment, and judges whether the read transmission identifier matches the transmission identifier sent by the program list receiving subunit, if match (if the transmission identification carried by the header of the data unit is identical to at least one of the transmission identifications obtained from the EPG, then it is considered a match), then the data unit is sent to the cache unit, and the header of the data unit The information is sent to the integrity judgment unit;

The cache unit caches after receiving the data unit sent by the matching judging unit;

After the integrity judging unit receives the header information of the data unit sent by the matching unit, it judges whether the data file selected by the user has been completely received according to the information, and if so, restores the data unit cached in the cache unit as a data file; Otherwise, an instruction is sent to the matching judging unit, instructing the matching judging unit to continue matching judging processing on other data units.

Embodiment two

This embodiment describes the method and system for transmitting data through the mobile multimedia broadcast channel in the CMMB system. In this embodiment, the process of transmitting data through the mobile multimedia broadcast channel in the CMMB system includes:

The network side generates an electronic program list and sends it to:

According to the descriptive information of the file to be transmitted (such as title, file type, file size, etc.) and the service identification of the file to be transmitted, the network side generates the content related to data broadcasting in the electronic program list, and sends the generated electronic program Single multiplexed to the broadcast channel to send;

The network side generates content data and sends it:

The network side obtains the original data of the data broadcast content, generates the data file to be transmitted, divides the data file to be transmitted into packets, and fills the data packet into the data unit of the multiplexed subframe data segment corresponding to the service identifier, which is the data unit to be transmitted. The data file is assigned a transmission identifier, and the transmission identifier corresponding to the data file is filled in the data unit header; the file data broadcast file list is generated, and the transmission identifier corresponding to each data file is identified in the list, and the list is carried in the data unit. The multiplexing subframe is described, and the multiplexing subframe is sent on the multimedia broadcast channel;

The terminal receives content data:

The terminal selects the content data from the electronic program guide, obtains the service identifier corresponding to the selected content data from the electronic program guide, receives the multiplexed subframe corresponding to the service identifier from the multimedia broadcast channel; reads the multiplexed subframe The data broadcast file list carried in the data segment data unit, and obtain the transmission identification corresponding to the content data selected by the user from the list; read the transmission identification of the data unit header of the data segment in the multiplexing subframe, if the If the transmission identifier matches the transmission identifier obtained by the terminal from the data broadcast file list, the data unit is received, and the received data unit is recovered as a data file and provided to the user.

The above data transmission process can be realized through the business layer system of the CMMB system.

The structural diagram of the CMMB service layer system in Embodiment 2 of the present invention can be shown in Figure 3. The CMMB service layer system includes a data content generation module, an electronic program guide generation module, a control information generation module and a multiplexing module.

The data content generation module is used to generate data broadcasting content. The data content generating module may include functional submodules as shown in Figure 4:

Receiving sub-module: used to receive the original data from the data content source, and identify the data type of the original data, and then use the corresponding encoding method to encode according to the data type of the original data to form a data file to be transmitted; the receiving sub-module receives After receiving the original data, send instructions to the service application sub-module, content data processing sub-module and electronic program guide information sending sub-module respectively;

Service application sub-module: used to apply to the control information generation module for a service channel for transmitting data content according to the instructions sent by the receiving sub-module; receive the service identification and service channel information returned by the control information generation module;

The content data processing submodule is used to subpackage the data file to be transmitted according to the instruction sent by the receiving submodule, and send the data packet and the service identifier corresponding to the data file to the multiplexing module;

Electronic program guide information sending sub-module: used to send the descriptive information of the data file (such as subject, file type, size, etc.) and service identification to the electronic program guide generation module according to the instruction sent by the receiving sub-module.

The electronic program guide generation module is used to generate the electronic program guide according to the description information and service identification of the data file received from the data content generation module.

The control information generating module is used to apply for service channel resources from the multiplexing module according to the request for applying for a service channel sent by the data content generating module, and generate various control information tables and service identifiers according to the allocation information fed back by the multiplexing module, The control information generating module sends the generated service identifier to the content data generating module.

The multiplexing module constructs a multiplexing frame from the content data generated by the data content generating module, the electronic program unit generated by the electronic program generating module, and the control information generated by the control information generating module, and sends it on the multimedia broadcast channel. The multiplexing module can include functional submodules as shown in Figure 9:

Receiving sub-module: used to receive the data packet sent by the data content generating module and the corresponding service identification;

The transmission identification allocation sub-module is used for allocating transmission identifications for data files;

The list generating submodule is used to generate a list of data broadcast files according to the transmission identifier allocated by the transmission identifier distribution submodule, and the corresponding transmission identifier of each data file is identified in the list;

Data processing sub-module: used to fill the data packet received by the receiving sub-module into the data unit of the multiplexed subframe data segment corresponding to the service identifier, and generate the data unit header according to the transmission identifier and other information to ensure the transmission of the same data file The data unit has the same data identifier; the data broadcast file list is filled into the data unit in the data segment of the multiplexing subframe, and the head of the data unit indicates that the data unit bears the data broadcast file list; then the processing Good data is sent to the launch sub-module;

Transmitting sub-module: used to encode, interleave, map, modulate, and frame the data processed by the data processing sub-module to form a transmitting signal and send it on the multimedia broadcast channel.

Referring to Fig. 10, it is a schematic flow diagram of the data transmission based on the CMMB service layer system structure in the embodiment of the present invention two, and concrete steps comprise:

Step 1. The data content source transmits the content to be sent to the data content generation module, and the data content generation module recognizes and encodes the content sent by the data content source after receiving the content, and uses the corresponding encoding method to encode the original data according to the identified data type Encode to form a data file.

Step 2. After receiving the content sent by the data content source, the data content generating module applies to the control information generating module for a business channel for transmitting data content.

Step 3: The control information generating module applies for a service channel to the multiplexing module according to the request of the data content generating module for applying for a service channel.

Step 4: The multiplexing module sends a request to the physical layer of the broadcast network according to the request of the control information generating module to apply for a service channel, requesting to apply for a physical channel for transmitting services.

After the physical layer of the broadcast network completes the allocation of service physical channels, it will report the allocation information to the multiplexing layer.

Step 5, the multiplexing layer feeds back the allocated service channel information to the control information generation module.

Steps 6a-6b, the control information generation module assigns service identifiers (each service identifier corresponds to a service channel) for the data broadcasting service according to the service channel information fed back by the multiplexing layer, and sends the assigned service identifiers to the data content generation module. The control information generation module also generates a corresponding control information table, and sends the control information table to the multiplexing module.

Step 7: After receiving the service identifier, the data content generating module determines that the service channel is already available.

Step 8. The data content generation module sends the service identification and description information of the data file to be transmitted (such as the name, title, file type, file size, etc. of the data file) to the electronic program guide generation module.

Step 9a-9b, the electronic program guide generating module generates electronic program guide information related to the data broadcasting service according to the above information provided by the data content generating module, and sends the generated electronic program guide to the multiplexing module, and the multiplexing module sends the electronic program guide Multiplexed to the multimedia broadcast channel, and finally sent to the terminal.

The electronic program guide generated by the electronic program guide generation module includes a business table, a content table, an arrangement information table, and an access table. The data structure of the arrangement table can be shown in Table 5.

table 5

Step 10, the data content generating module sends the data file to the multiplexing module after sub-packaging and encapsulating. The data content generation module can also perform forward error correction calculation on the data packet as required.

Step 11, the multiplexing module assigns the transmission identification for the data content file, generates a data broadcast file list, provides the corresponding relationship between the data file URI and the transmission identification in the list, and carries the list in the data unit of the multiplexing subframe data segment , and indicate at the head of the data unit that the data unit carries a list of data broadcast files; the multiplexing module encapsulates the data packet into the data unit of the multiplexing subframe data segment corresponding to the service identification, and transmits the identification Inserted into a data unit as a data unit header.

In this embodiment, the multiplexing module generates a data broadcast file list in each data segment, and the data broadcast list only identifies the data files transmitted in this data segment, and the data broadcast list gives each data file corresponding in The transmission identifier in this data segment, the data broadcast list is carried in the data unit in the data segment of the multiplexing subframe. The data structure of the data broadcast list may be shown in Table 6.

Table 6

In this embodiment, the data unit header may not carry special information or identification, and the data structure of the data unit header may be shown in Table 7.

Table 7

grammar illustrate data unit header() { Transport ID The transfer identifier of the data unit, the units with the same transfer identifier belong to the same file. number of packages }

A data unit includes 1 to n data packets, and the data structure of the packet headers of these data packets can be shown in Table 8.

Table 8

grammar illustrate Packet Header() { head length FEC-encoded packet identifier FEC-encoded packet identification for recovery during forward error correction Data length }

Step 12, the multiplexing module sends the multiplexing frame to the terminal through the service channel corresponding to the service identifier. At the same time, the multiplexing module sends corresponding control information through the logical control channel.

In the above process, if the service channel for transmitting service data has been determined before, the above steps 2-7 can be omitted.

In the above process, step 8 and step 10 do not have strict timing requirements, that is, the data content generation module sends information to the electronic program guide generation module, and the data content generation module performs two processes of data file subcontracting, there is no strict sequence .

Through the above process, after the network side generates the electronic program guide and content data, the user can select the data content to be downloaded according to the content of the electronic program guide, and according to the service identification obtained in the electronic program guide and the received data broadcast list, Receiving the related multiplexed data units in the frame to complete the file download.

Referring to FIG. 11 , it is a schematic flow diagram of a terminal receiving data from a mobile multimedia broadcast channel in Embodiment 2 of the present invention, and the specific steps include:

Step 201, the terminal obtains the transmission channel information of the EPG on the control logic channel of time slot 0, and receives the EPG from the designated transmission channel according to the information.

Step 202, the user selects the required data content from the EPG, and the terminal obtains the corresponding data file information, service identifier and file URI corresponding to the data file from the EPG according to the data content selected by the user.

The terminal program can know the transmission time of the data file selected by the user at the multiplexing layer, the transmission identifier and other information such as the size and type of the file through the arrangement table in the electronic program table (the data structure of the arrangement table is shown in Table 4). wait. The size, type and encoding method of the file are mainly used to prepare the terminal program to process the data file and find the relevant application program entry. The service identifier required by the terminal is obtained from the service table associated with the orchestration table.

Step 203, the terminal obtains the information of the transmission channel corresponding to the service identifier according to the service identifier corresponding to the selected data content, and receives the multiplexed subframe from the corresponding transmission channel.

Since the transmission channel corresponds to the service identifier, the received multiplexed subframe matches the service identifier corresponding to the data content selected by the user.

Step 204, the terminal obtains the data broadcast file list from the received data unit of the multiplexed subframe data segment. In this step, the terminal reads the header of the data unit of the multiplexed subframe data segment, and if the header of the data unit indicates that the data unit carries a list of data broadcast files, the terminal reads the bearer from the data unit. List of data broadcast files for .

Step 205, the terminal obtains the transmission information corresponding to the data file according to the data broadcast file list, for example, obtains the transmission identification corresponding to the data file.

Step 206, the terminal reads the data unit in the data segment of the multiplexed subframe.

Step 207, the terminal reads the transmission identification in the data unit header, and judges whether the transmission identification matches the transmission identification in the data broadcast file list, if it matches, then executes step 208; otherwise, returns to step 206, and continues to read the complex Use other data units in the subframe data segment.

Step 208: If the transmission identifier in the header of the data unit matches the transmission identifier obtained from the EPG, put the data unit in the buffer.

Step 209, the terminal judges whether all data units corresponding to the data content have been completely received, and if so, execute step 210; otherwise, return to step 206, and continue to read other data units in the multiplexed subframe data segment.

Whether a terminal judges whether a file has been received completely can be judged by FEC (forward error correction) data or the total number of data units of the file identified in the data unit header.

Step 210, the terminal recovers the data units in the cache area as data files, and provides them to the user.

The structure of the terminal that completes the above process may be as shown in FIG. 12 .

Referring to FIG. 12 , it is a schematic structural diagram of a terminal in Embodiment 2 of the present invention. The terminal includes: a receiving unit, a matching judging unit, an integrity judging unit, a data cache unit, and a data restoring unit.

The receiving unit is used for receiving information from the multimedia broadcast channel, and the receiving unit includes a control information receiving subunit, a program list receiving subunit and a multiplexing subframe receiving subunit. in,

The control information receiving subunit receives control information from the control logic channel in the multimedia broadcast channel, and sends the received control information to the program list receiving subunit. The control information indicates the channel for transmitting the electronic program list, such as service logic channel 1 ;

The program guide receiving subunit receives the electronic program guide from the service logic channel 1 for transmitting the electronic program guide according to the received control information; and obtains the corresponding data file information from the electronic program guide according to the data content selected by the user, and a service identifier corresponding to the data file, and send the service identifier to the multiplexing subframe receiving subunit;

The multiplexing subframe receiving subunit receives the multiplexing subframe from the corresponding service logical channel 2 according to the received service identifier, and then sends a judgment instruction to the matching judgment unit;

After the matching judging unit receives the judging instruction, it reads the data unit header information of the multiplexed subframe data segment, and when it reads the data unit header information indicating that the data broadcast file list is carried, reads the data unit carried by the data unit. The list of data broadcast files, and obtain the transmission identification corresponding to the content data selected by the user from the list; then read the transmission identification carried by the header of other data units, if the read transmission identification is the same as that from the list The obtained transmission identification matches (if the transmission identification carried by the data unit header is identical to at least one of the transmission identifications obtained from the list, it is considered to match), then the data unit is sent to the cache unit, and sending the header information of the data unit to the integrity judgment unit;

The cache unit caches after receiving the data unit sent by the matching judging unit;

After the integrity judging unit receives the header information of the data unit sent by the matching unit, it judges whether the data file selected by the user has been completely received according to the information, and if so, restores the data unit cached in the cache unit as a data file; Otherwise, an instruction is sent to the matching judging unit, instructing the matching judging unit to continue matching judging processing on other data units.

Embodiment three

This embodiment describes the method and system for transmitting data through the mobile multimedia broadcast channel in the CMMB system. This embodiment is similar to Embodiment 2, the difference is:

In the process of data transmission in this embodiment, the data broadcast list identifies the correspondence between all files transmitted in this multiplexed subframe and their transmission identifiers, and the data broadcast list is filled in one or more of the data segments of the multiplexed subframe. Among the multiple data units, when multiple data units are filled, they are transmitted in the multiplexed subframe in the form of carousel, such as once every few seconds.

In the CMMB service layer system of the present embodiment, the data processing submodule of the multiplexing module fills the data broadcast file list into one or more data units in the data segment of the multiplexing subframe, and in this or these data units (such as the head of the data unit) identify that this or these data units are carrying a data broadcast file list, and the data broadcast list identifies the correspondence between all files transmitted in this multiplexing subframe and their transmission identifiers; The transmitting submodule can transmit the data broadcast list in the multiplexing subframe in the form of carousel.

Correspondingly, after the terminal accesses the multiplexing subframe, if there is no data broadcast file list transmission in the current time slot, it needs to wait until the data broadcast file list is received, and then receive the data unit according to the corresponding relationship between the file name and the transmission identifier indicated in the list .

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (29)

1. A method for transmitting multimedia broadcast data, comprising the steps of:

applying for a service channel for transmitting a data file, and allocating a service identifier and a transmission identifier corresponding to the data file, wherein the service identifier is allocated according to service channel information fed back by a multiplexing layer, and the transmission identifier is allocated after determining that the service channel can be obtained according to the service identifier;

generating an electronic program list according to the description information of the data file, and the service identifier and the transmission identifier corresponding to the data file, and multiplexing the electronic program list to a multimedia broadcast channel for transmission;

and loading the data file and a transmission identifier corresponding to the data file into a data unit of a multiplexing subframe data section, wherein the multiplexing subframe corresponds to the service identifier of the data file, and the multiplexing subframe is sent on a service channel corresponding to the service identifier.

2. The method of claim 1, wherein the procedure of loading the data file and the transmission identifier in a data unit of a data segment of a multiplexing subframe comprises the steps of:

performing sub-packet processing on the data files;

filling the data packets of the data file into the data units of the multiplex subframe data section;

and filling the transmission identification into the head of the data unit.

3. The method of claim 1, wherein after obtaining a service channel for transmitting the data file, the multiplexing subframe carrying the data file is transmitted in the service channel obtained by applying.

4. The method of claim 1 or 3, further comprising, after transmitting said electronic program guide and said data file, the steps of:

the terminal obtains corresponding data file information, and a service identifier and a transmission identifier corresponding to the data file from an electronic program list according to the data content selected by a user;

the terminal receives a multiplexing subframe corresponding to the service identifier from a multimedia broadcast channel according to the obtained service identifier;

and the terminal acquires a transmission identifier from the data unit of the multiplex subframe data segment, judges whether the transmission identifier is matched with the transmission identifier acquired from the electronic program list or not, and receives the data unit if the transmission identifier is matched with the transmission identifier acquired from the electronic program list.

5. A method for transmitting multimedia broadcast data, comprising the steps of:

applying for a service channel for transmitting a data file, and allocating a service identifier and a transmission identifier corresponding to the data file, wherein the service identifier is allocated according to service channel information fed back by a multiplexing layer, and the transmission identifier is allocated after determining that the service channel can be obtained according to the service identifier;

generating an electronic program list according to the description information of the data file and the service identification corresponding to the data file, and multiplexing the program list to a multimedia broadcast channel for transmission;

generating a data broadcast file list, wherein the list comprises the corresponding relation between the data files and the transmission identification;

loading the data broadcast file list on a multiplexing subframe, and loading the data file and a transmission identifier corresponding to the data file on a data unit of a data section of the multiplexing subframe, wherein the multiplexing subframe corresponds to a service identifier of the data file; and sending the multiplexing subframe on a service channel corresponding to the service identifier.

6. The method of claim 5, wherein the loading of the data file and the transmission identifier into the process of multiplexing data units of a subframe data segment comprises the steps of:

performing sub-packet processing on the data files;

filling the data packets of the data file into the data units of the multiplex subframe data section;

and filling the transmission identification into the head of the data unit.

7. The method of claim 5, wherein the loading the data broadcast file list in the multiplex subframe comprises:

filling the data broadcast file list into a data unit in the data segment of the multiplexing subframe, and identifying that the data unit bears a data broadcast file list in the data unit, wherein the data broadcast file list comprises a corresponding relation between a data file transmitted in the data segment and a transmission identifier of the data file;

or, the data broadcast file list is filled into the data unit in the data segment of the multiplexing subframe, and the data unit is marked with the data broadcast file list, wherein the data broadcast file list comprises the corresponding relation between all data files transmitted in the multiplexing subframe and the transmission identification of the data file.

8. The method of claim 7, wherein the data broadcast file list containing the correspondence between all data files in the multiplexing subframe and the transmission identifier of the file is carried in a plurality of data units in the data segment of the multiplexing subframe, and the data broadcast file list is transmitted in the multiplexing subframe in a carousel manner.

9. The method according to claim 7 or 8, wherein in the header of the data unit carrying the data broadcast file list, it is indicated that the data unit carries the data broadcast file list.

10. The method of claim 5, wherein after obtaining a service channel for transmitting the data file, the multiplexing subframe carrying the data file is transmitted in the service channel obtained by applying.

11. The method of claim 5 or 10, further comprising, after transmitting said electronic program guide and said data file, the steps of:

the terminal obtains corresponding data file information and a service identifier corresponding to the data file from an electronic program list according to the data content selected by a user;

the terminal receives a multiplexing subframe corresponding to the service identifier from a multimedia broadcast channel according to the obtained service identifier;

and the terminal acquires the data broadcast file list from the multiplexing subframe, acquires a transmission identifier corresponding to the data content selected by the user from the list, and receives a data unit matched with the transmission identifier in the data segment of the multiplexing subframe.

12. A method for receiving multimedia broadcast data, comprising the steps of:

the terminal obtains corresponding data file information, and a service identifier and a transmission identifier corresponding to the data file from an electronic program list according to the data content selected by a user;

the terminal receives a multiplexing subframe corresponding to the service identifier from a multimedia broadcast channel according to the obtained service identifier;

and the terminal acquires a transmission identifier from the data unit of the multiplex subframe data segment, judges whether the transmission identifier is matched with the transmission identifier acquired from the electronic program list or not, and receives the data unit if the transmission identifier is matched with the transmission identifier acquired from the electronic program list.

13. The method of claim 12, wherein the terminal obtains the transmission identification from a header of a data unit of the multiplex subframe data segment.

14. The method as claimed in claim 12, wherein after the terminal receives the data unit corresponding to the data file, the method further comprises the steps of: and restoring the received data unit into a data file and providing the data file for a user.

15. A method for receiving multimedia broadcast data, comprising the steps of:

the terminal obtains corresponding data file information and a service identifier corresponding to the data file from an electronic program list according to the data content selected by a user;

the terminal receives a multiplexing subframe corresponding to the service identifier from a multimedia broadcast channel according to the obtained service identifier;

and the terminal acquires a data broadcast file list carried by the multiplexing subframe from the multiplexing subframe, acquires a transmission identifier corresponding to the data content selected by the user from the list, and receives a data unit matched with the transmission identifier in the data segment of the multiplexing subframe.

16. The method of claim 15, wherein the process of the terminal obtaining the list of data broadcast files carried by the multiplex subframe from the multiplex subframe comprises:

and the terminal reads the head of the data unit in the multiplexing subframe data segment, and if the head of the data unit identifies that the data unit bears a data broadcast file list, the terminal reads the data broadcast file list from the data unit.

17. The method of claim 16, wherein if the terminal does not obtain the data broadcast file list in the current time slot of the multiplexing subframe, the terminal receives the data broadcast file list in a subsequent time slot of the multiplexing subframe, and after receiving the data broadcast file list, obtains a transmission identifier corresponding to the data content selected by the user according to the data broadcast file list, and receives a data unit matching with the transmission identifier.

18. The method as claimed in claim 15, wherein after the terminal receives the data unit corresponding to the data file, the method further comprises the steps of: and restoring the received data unit into a data file and providing the data file for a user.

19. A transmission system for multimedia broadcast data, comprising: a data content generation module, an electronic program list generation module, a control information generation module and a multiplexing module, wherein

The data content generating module is used for receiving original content data, generating a data file from the original content data and sending an instruction to the control information generating module; receiving a service identifier corresponding to the data file from the control information generation module, distributing a transmission identifier for the data file, and sending the description information of the data file, the service identifier corresponding to the data file and the transmission identifier to the electronic program list generation module; sending the data file, and a service identifier and a transmission identifier corresponding to the data file to the multiplexing module;

the control information generation module is used for applying for service channel resources to the multiplexing module according to the request for applying for the service channel sent by the data content generation module, generating a service identifier corresponding to the data file according to the distribution information fed back by the multiplexing module, and sending the service identifier to the data content generation module;

the electronic program list generating module is used for receiving the description information of the data file, the service identifier and the transmission identifier corresponding to the data file, generating an electronic program list and sending the electronic program list to the multiplexing module;

the multiplexing module is used for multiplexing the received electronic program list to a multimedia broadcast channel for transmission; and loading the data file and the transmission identifier corresponding to the data file into a data unit of a multiplexing subframe data section, wherein the multiplexing subframe corresponds to the service identifier of the data file, and the multiplexing subframe is sent on a service channel corresponding to the service identifier.

20. The system of claim 19, wherein the data content generation module comprises: a receiving submodule, a service application submodule, a content data processing submodule and an electronic program list information sending submodule, wherein

The receiving submodule is used for receiving the original content data, generating a data file from the original content data and respectively sending instructions to the service application submodule, the content data processing submodule and the electronic program list information sending submodule;

the service application submodule is used for applying a service channel for transmitting data contents to the control information generation module according to the instruction sent by the receiving submodule; receiving a service identifier returned by the control information generation module and service channel information corresponding to the service identifier, and distributing a transmission identifier for the data file to be transmitted;

the content data processing submodule is used for subpackaging the data files according to the instruction sent by the receiving submodule and sending the data packets of the data files, the service identification and the transmission identification which correspond to the data files to the multiplexing module;

and the electronic program list information sending submodule is used for obtaining the service identification and the transmission identification of the data file from the service application submodule according to the instruction sent by the receiving submodule and sending the obtained transmission identification, the service identification corresponding to the data file and the description information of the data file to the electronic program list generating module.

21. The system of claim 19 or 20, wherein the multiplexing module comprises: a receiving sub-module, a data processing sub-module and a transmitting sub-module, wherein

The receiving submodule is used for receiving the data file sent by the data content generating module, and the corresponding service identifier and transmission identifier;

the data processing submodule is used for filling the data packet of the data file received by the receiving submodule into a data unit of a multiplexing subframe data segment and filling the transmission identifier into the head of the data unit, wherein the multiplexing subframe corresponds to the service identifier;

and the transmitting submodule is used for transmitting the multiplexing subframe processed by the data processing submodule on a service channel of a multimedia broadcast channel corresponding to the service identifier.

22. A transmission system for multimedia broadcast data, comprising: a data content generation module, an electronic program list generation module, a control information generation module and a multiplexing module, wherein

The data content generating module is used for receiving original content data, generating a data file from the original content data and sending an instruction to the control information generating module; receiving a service identifier corresponding to the data file from the control information generation module, sending description information of the data file and the service identifier corresponding to the data file to the electronic program list generation module, and sending the data file and the service identifier corresponding to the data file to the multiplexing module;

the control information generation module is used for applying for service channel resources to the multiplexing module according to the request for applying for the service channel sent by the data content generation module, generating a service identifier corresponding to the data file according to the distribution information fed back by the multiplexing module, and sending the service identifier to the data content generation module;

the electronic program list generating module is used for receiving the description information of the data file and the service identifier corresponding to the data file, generating an electronic program list and sending the electronic program list to the multiplexing module;

the multiplexing module is used for multiplexing the received electronic program list to a multimedia broadcast channel for transmission; distributing a transmission identifier for the data file; generating a data broadcast file list, wherein the list comprises the corresponding relation between the data files and the transmission identification; loading the data broadcast file list on a multiplexing subframe, and loading the data file and a transmission identifier corresponding to the data file on a data unit of a data section of the multiplexing subframe, wherein the multiplexing subframe corresponds to a service identifier of the data file; and sending the multiplexing subframe on a service channel corresponding to the service identifier.

23. The system of claim 22, wherein the data content generation module comprises: a receiving submodule, a service application submodule, a content data processing submodule and an electronic program list information sending submodule, wherein

The receiving submodule is used for receiving the original content data, generating a data file from the original content data and respectively sending instructions to the service application submodule, the content data processing submodule and the electronic program list information sending submodule;

the service application submodule is used for applying a service channel for transmitting data contents to the control information generation module according to the instruction sent by the receiving submodule; receiving a service identifier returned by the control information generation module and service channel information corresponding to the service identifier;

the content data processing submodule is used for subpackaging the data files according to the instruction sent by the receiving submodule and sending the data packets of the data files and the service identification corresponding to the data files to the multiplexing module;

and the electronic program list information sending submodule is used for sending the description information of the data file and the service identification corresponding to the data file to the electronic program list generating module according to the instruction sent by the receiving submodule.

24. The system of claim 22, wherein the multiplexing module comprises: a receiving submodule, a transmission identifier distribution submodule, a list generation submodule, a data processing submodule and a transmitting submodule, wherein

The receiving submodule is used for receiving the data file sent by the data content generating module and the corresponding service identification;

a transmission identifier distribution submodule for distributing a transmission identifier to the data file;

the list generating submodule is used for generating a data broadcast file list according to the transmission identification distributed by the transmission identification distributing submodule, and the list comprises the corresponding relation between the data file and the transmission identification;

the data processing submodule is used for filling the data file received by the receiving submodule and the transmission identifier which is distributed by the transmission identifier distribution submodule and corresponds to the data file into a data unit of a data section of a multiplexing subframe, filling the data file list into the multiplexing subframe, and the multiplexing subframe corresponds to the service identifier;

and the transmitting submodule is used for transmitting the multiplexing subframe processed by the data processing submodule on a service channel of a multimedia broadcast channel corresponding to the service identifier.

25. The system according to claim 24, wherein the data processing sub-module fills the data broadcast file list into the data unit in the data segment of the multiplex sub-frame, and indicates at the head of the data unit that the data unit carries a data broadcast file list, and the data broadcast file list contains the corresponding relationship between the data file transmitted by the data segment and the transmission identifier;

or, the data processing sub-module fills the data broadcast file list into one or more data units in the data segment of the multiplex subframe, and indicates that the data unit carries the data broadcast file list at the head of the one or more data units, where the data broadcast file list includes a corresponding relationship between the data file transmitted by the multiplex subframe and the transmission identifier.

26. A terminal, comprising: a receiving unit, a matching judgment unit, a buffer unit and an integrity judgment unit, wherein

The receiving unit is used for receiving the information sent on the multimedia broadcast channel and comprises a control information receiving subunit, a program list receiving subunit and a multiplexing subframe receiving subunit;

the control information receiving subunit is configured to receive control information from a control logical channel in a multimedia broadcast channel and send the received control information to the program list receiving subunit, where the control information indicates a channel through which the electronic program list is transmitted;

the program list receiving subunit is configured to receive an electronic program list according to the received control information, obtain corresponding data file information, and a service identifier and a transmission identifier corresponding to the data file from the electronic program list according to data content selected by a user, send the service identifier to the multiplexing subframe receiving subunit, and send the transmission identifier to the matching judgment unit;

the multiplex subframe receiving subunit is configured to receive the corresponding multiplex subframe according to the received service identifier, and send a determination instruction to the matching determination unit;

a matching judgment unit, configured to obtain a carried transmission identifier from a data unit of the data segment of the multiplex subframe received by the multiplex subframe receiving subunit, judge whether the transmission identifier matches the transmission identifier received by the program list receiving subunit, and send the data unit to the cache unit if the transmission identifier matches the transmission identifier received by the program list receiving subunit;

the cache unit is used for receiving the data unit sent by the matching judgment unit and caching;

the integrity judging unit is used for judging whether the data file selected by the user is completely received or not according to the information after the head information of the data unit sent by the matching unit is received, and if so, recovering the data unit cached in the caching unit into the data file; otherwise, sending an instruction to the matching judgment unit to instruct the matching judgment unit to continue to perform matching judgment processing on other data units.

27. The terminal of claim 26, wherein the terminal further comprises:

and the data recovery unit is used for recovering the data units cached in the cache unit into data files.

28. A terminal, comprising: a receiving unit, a matching judgment unit, a buffer unit and an integrity judgment unit, wherein

The receiving unit is used for receiving the information sent on the multimedia broadcast channel and comprises a control information receiving subunit, a program list receiving subunit and a multiplexing subframe receiving subunit;

the control information receiving subunit is configured to receive control information from a control logical channel in a multimedia broadcast channel and send the received control information to the program list receiving subunit, where the control information indicates a channel through which the electronic program list is transmitted;

the program list receiving subunit is used for receiving the electronic program list according to the received control information, acquiring corresponding data file information and a service identifier corresponding to the data file from the electronic program list according to the data content selected by the user, and sending the service identifier to the multiplexing subframe receiving subunit;

the multiplex subframe receiving subunit is configured to receive the corresponding multiplex subframe according to the received service identifier, and send a determination instruction to the matching determination unit;

a matching judgment unit, configured to obtain a data broadcast file list from the multiplexing subframe received by the multiplexing subframe receiving subunit, and obtain a transmission identifier corresponding to the data content selected by the user from the list; acquiring a carried transmission identifier from a data unit of the multiplex subframe data segment, judging whether the transmission identifier is matched with the transmission identifier acquired from the list, and if so, sending the data unit to the cache unit;

the cache unit is used for receiving the data unit sent by the matching judgment unit and caching;

the integrity judging unit is used for judging whether the data file selected by the user is completely received or not according to the information after the head information of the data unit sent by the matching unit is received, and if so, recovering the data unit cached in the caching unit into the data file; otherwise, sending an instruction to the matching judgment unit to instruct the matching judgment unit to continue to perform matching judgment processing on other data units.

29. The terminal of claim 28, wherein the terminal further comprises:

and the data recovery unit is used for recovering the data units cached in the cache unit into data files.

Images