CN102752310B - A kind of broadcast control method for CMMB data broadcast and system - Google Patents

Abstract

For broadcast control method and the system of CMMB data broadcast, described system comprises as lower module: broadcasting policy generation module (1), for generating broadcast policy configuration file, and uploading to data download server; Content obtaining module (2), for downloading the business datum and broadcast policy configuration file that need to upgrade in real time from data download server; Broadcast tactful dlm (dynamic loading module) (3), broadcast policy configuration file for resolving and be loaded into Content Management scheduler module; Content Management scheduler module (4), is responsible for Scheduling content item and organize content item, adopts dispatch from high to low according to priority packet for inhomogeneity content item, adopts to intersect to split scheduling for the scheduling mechanism between similar content item; Broadcast control module (5), be responsible for invoking content management scheduler module and obtain the tactful configuration condition of broadcast, then obtain business tine from content obtaining module, and broadcast according to broadcast policy configuration file the content reconfigured.

Description

A broadcast control method and system for CMMB data broadcast

technical field

The invention belongs to the technical field of mobile multimedia broadcasting, and in particular relates to a broadcast control method and system for CMMB data broadcasting.

Background technique

With the expansion of China Mobile Multimedia Broadcasting CMMB (ChinaMultimediaMobileBroadcasting) network coverage, more and more mobile phones, PNDs, vehicle-mounted intelligent terminals and other equipment are equipped with CMMB functions. In addition to audio and video services, data services are also an important part of CMMB services, such as real-time traffic conditions, stock finance, electronic newspapers and magazines, and life service information. Publishing content through the CMMB digital broadcasting network, because there is no traffic fee, and the point-to-face broadcasting method, the operating cost and user use cost have great advantages compared with the traditional content publishing through the mobile communication network.

Compared with the Internet, the data broadcast bandwidth used by CMMB for a data service is usually small (for example, a time slot can only provide an effective service bandwidth of 80kb/s. Due to the limited time slot, with the increase of services, a service can be allocated to The bandwidth may only be 10kb/s or even lower). If the service contains a lot of content, it will be difficult to ensure that the service content can be completely received by the terminal within an acceptable time without using a special broadcast control method.

In the prior art, for a service with a small amount of data and relatively simple content, it is only necessary to allocate sufficient broadcast bandwidth, and the requirements for terminal reception can be met by simply controlling the broadcast. Some business systems with a large amount of content data use a time-segmented broadcast method in terms of bandwidth to split the content and broadcast different content at different time periods. In addition, there is a timing push solution, which can transmit a large amount of content of hundreds of megabytes. This solution combines the multiple time slots vacated by stopping the audio and video services at night to obtain a large exclusive bandwidth for data transmission. The broadcast control of this solution is mainly reflected in the actual dynamic multiplexing and the control of the broadcast time point. For services with a large amount of data, the solution of time-segmented broadcast and scheduled push can solve the problem of insufficient bandwidth, but it cannot meet the needs of users to receive complete content at any time, especially cannot guarantee that users can receive high-priority content as soon as possible. level content. Once business needs change, it is difficult to adapt quickly. In fact, in complex services, the amount of data is larger, and there are more types of content. Different content has different priorities and users' requirements for receiving time. To meet such complex business requirements, a flexible and powerful broadcast control system is required to manage and broadcast content.

Contents of the invention

In view of the problems of the prior art, the present invention provides a kind of broadcast control system for CMMB data broadcasting, it is characterized in that comprising following module:

A broadcast strategy generation module (1), used to generate a broadcast strategy configuration file, and upload to the data download server;

A content acquisition module (2), configured to download in real time from the data download server the service data and broadcast strategy configuration files that need to be updated;

The broadcast strategy dynamic loading module (3), is used for parsing the broadcast strategy configuration file and loads it into the content management scheduling module;

The content management scheduling module (4), responsible for scheduling content items and managing content items, adopts scheduling from high to low according to priority grouping for different types of content items, and adopts cross split scheduling for the scheduling mechanism between similar content items;

The broadcast control module (5) is responsible for invoking the content management and scheduling module to obtain broadcast strategy configuration conditions, and then obtains service content from the content acquisition module, and broadcasts the recombined content according to the broadcast strategy configuration file.

Further, the broadcast control system for CMMB data broadcasting according to the present invention is characterized in that the configuration items of the broadcast strategy configuration file include frequency point, service ID, priority, title, start time, end time, minimum Send cycle, content, packet size and playout mode.

In addition, the present invention also provides a kind of broadcast control method for CMMB data broadcasting, it is characterized in that comprising the following steps:

Step 1. The system first generates and uploads the broadcast strategy configuration file data to the data download server;

Step 2, the content acquisition module acquires the latest business data package and broadcast strategy configuration file from the data download server;

Step 3, the system dynamically loads the broadcast strategy configuration file;

Step 4, the broadcast strategy dynamic loading module parses the broadcast strategy configuration file, loads it into the content management scheduling module after the analysis is successful, and deletes the service data packet set by the last broadcast strategy configuration file after the load is successful;

Step 5: The broadcast control module calls the content management scheduling module to obtain the configuration conditions of the broadcast strategy, and then obtains the service content from the content acquisition module, and broadcasts the reassembled content according to the broadcast strategy configuration file.

Further, the broadcast control method for CMMB data broadcasting of the present invention is characterized in that the configuration items of the broadcast policy configuration file include frequency point, service ID, priority, title, start time, end time, minimum Send cycle, content, packet size and playout mode. ,

The present invention classifies business content, specifies different priorities, broadcast frequency and receiving time requirements for different content, automatically fragments and repackages larger data content according to the broadcast strategy, and adopts optimized The scheduling algorithm controls the broadcast order of various contents. Solve the shortcomings of existing technologies that are difficult to support complex services, and can flexibly adapt to changes in services. According to the service requirements and the characteristics of the service content, formulating an appropriate broadcast strategy for broadcast control can greatly improve the utilization rate of bandwidth and meet the needs of various types of services, thereby bringing more abundant data services to CMMB.

Description of drawings

Fig. 1 is the functional block diagram of the broadcast control system for CMMB data broadcasting of the present invention;

Fig. 2 is the flow chart of the broadcast control method that is used for CMMB data broadcasting according to the present invention;

FIG. 3 is a schematic diagram of splitting content in the playout control method for CMMB data broadcasting according to the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

First, introduce the broadcast mode of CMMB data service. Currently, there are two broadcast modes for CMMB data service: stream mode and file mode. No matter which mode is adopted, as long as it is a non-real-time service, the content needs to be broadcast in rotation to ensure that the service content can be received no matter when the terminal is turned on. The carousel mechanism will make the effective transmission bandwidth lower than the actual bandwidth allocated to the business. For example, if a service needs to broadcast 600KB of data content, if it is required to rotate three times per minute, the effective content that can actually be broadcast per minute is only 200KB, and it takes 3 minutes to complete the broadcast of all content. The 600KB of data may include content with different priorities. Users will need to receive high-priority content within 1 minute or less, such as stock quotes and real-time traffic information; while low-priority content, Such as electronic newspapers, users can accept 5 minutes or more to receive complete. This is just the simplest example.

Fig. 1 is the functional block diagram of the broadcasting control system that is used for CMMB data broadcasting of the present invention; As shown in the figure, the broadcasting control system that is used for CMMB data broadcasting of the present invention includes following functional modules:

The broadcast strategy generation module 1 is used to generate a broadcast strategy configuration file and upload it to the data download server. This module manages the broadcast content by editing the broadcast policy configuration items of the content. The main configuration items of the playout policy configuration file include frequency point, service ID, priority, title, start time, end time, minimum sending cycle, content, data packet size and playout mode.

The content obtaining module 2 is used for downloading in real time from the data download server the service data and broadcast strategy configuration files that need to be updated. The content acquisition module adopts a synchronization mechanism to keep synchronization with the remote data download server, and guarantees timely and accurate download of the latest data. According to the control strategy of the broadcast control module 5, the service content to be broadcast is obtained, and the reassembled content is broadcast.

The broadcast strategy dynamic loading module 3 is used to parse the broadcast strategy configuration file and load it into memory. After the broadcast strategy dynamic loading module parses the broadcast strategy configuration file successfully, it will be grouped according to the priority and then loaded into the memory. During parsing, the system will verify whether the system parameters set in the broadcast strategy configuration file are legal, such as service ID, priority and Start or end time, delete the content item data package set by the last broadcast policy configuration file after the last loading is successful.

The content management scheduling module 4 is responsible for scheduling content items and managing content items. The scheduling mechanism includes two types, that is, between different types of content items and between similar content items. The scheduling mechanism between different types of content items is grouped according to priority. To low scheduling, the scheduling mechanism between similar content items adopts cross split scheduling. When the system starts, the content management and scheduling module is initialized and sorted according to the priority grouping set by the content broadcast configuration file, and then scheduled through the content management and scheduling module. The content management scheduling module first checks the content items that meet the configuration conditions of the broadcast strategy according to the priority, and records and analyzes the data volume of different content items of the same type of content item. The data volume of the large data volume is given priority to broadcast, and then cross-split broadcast is used, and so on. The content management scheduling module completes the broadcasting of all priority queue content items.

The broadcast control module 5 is responsible for automatically broadcasting the content items satisfying the configuration conditions of the broadcast strategy, and managing the broadcast status of the content items. The playout status of the content item includes the time when the last sending was completed, the list of files sent, the number of splits of the content item, and the playout status (ie, active and waiting). If the content item is being sent, the content broadcast service will increase the split times of the content item by one time each time it is broadcast. If the content item is sent, the content broadcast service will update the time of the last sending completion to the current system time, and clear the The list of sent files and the number of splits of content items, and then set the broadcast status to wait, and finally check the broadcast status of similar content, if all similar content has been sent, reset the broadcast status of the broadcast content item to active. By analogy, the content playout control service cyclically calls the content management module to play out content items until all available bandwidth is occupied.

From the perspective of business needs to process data, the system must be able to process two types of data, that is, single large file data or data streams and scattered small file data or data streams. Single large file data includes pictures, videos, and binary files in custom formats, etc. This type of data must be split into file fragments or fixed-size data packets before it can be sent normally when sending under limited bandwidth. Scattered small file data includes HTML, text files, and XML files, etc. This type of data is relatively small or artificially made relatively small, so that it can be sent in units of files or data packets when sending under limited bandwidth.

From the perspective of business broadcast strategy, the system must be able to dynamically change the broadcast strategy. The main parameters of the broadcast strategy include: start broadcast time, end broadcast time, content broadcast interval period (that is, the broadcast content How long will it take to re-broadcast). To dynamically change the playout strategy, it must be possible to change each configuration parameter of the playout strategy in real time and to add or delete the content playout strategy.

From the perspective of the priority of broadcast content, the system must adopt an optimized scheduling algorithm to control the broadcast sequence of various contents to ensure the timely broadcast of data that requires higher real-time performance. Complete the broadcast within the out cycle.

From the perspective of bandwidth utilization, the system must adopt an optimized scheduling algorithm to control the broadcasting sequence of various contents to ensure that the broadcasting of all contents is completed under limited bandwidth resources, and start to receive the broadcasting content and receive the complete broadcasting The time of the content is within the range acceptable to the user.

Fig. 2 is the flow chart of the broadcast control method that is used for CMMB data broadcasting according to the present invention, and it comprises the steps:

Step 1. First, the broadcast strategy generation module generates the broadcast strategy configuration file and uploads it to the download server;

Step 2, the content acquisition module downloads the broadcast strategy configuration file and other business content;

Step 3. The broadcast strategy dynamic loading module loads the downloaded latest broadcast strategy configuration file.

Step 4: The content management and scheduling module is initialized according to the latest broadcast strategy configuration.

Step 5. Control the broadcast module to reassemble the business content and package and compress the broadcast.

Fig. 3 is the schematic diagram that content is split in the broadcast control method that is used for CMMB data broadcasting according to the present invention, and its specific process is as follows:

1. Assuming that the bandwidth for sending content per minute is 200KB/m, the broadcast policy configuration file defines two types of priority service content, namely content 1 (50KB) and content 2 (450KB).

2. The broadcast control module first copies the service content 1 to the release directory according to the priority definition, and the remaining available bandwidth is 150KB.

3. Control the broadcast module to copy service content 2 to the release directory. Since the data volume of service content 2 is greater than the remaining available bandwidth, only 150K of service content 2 is copied and released.

4. Repeat the process of 2 and 3, and after 3 minutes, control the broadcast module to complete a round of splitting and sending of the business content defined in the broadcast policy configuration file.

In addition, the present invention adopts the mechanism of periodically repeating the broadcast of the same content through data carousel. In the data service broadcast of the one-way data broadcast network, when the broadcast content has not been updated, it is used to ensure that any You can receive content when you turn on the phone.

The present invention classifies business content, specifies different priorities, broadcast frequency and receiving time requirements for different content (called broadcast strategy), and automatically slices larger data content according to the broadcast strategy Repackage and adopt an optimized scheduling algorithm to control the broadcast order of various contents.

The purpose of the present invention is to meet various types of service requirements, solve the disadvantage that the existing technology is difficult to support complex services, and flexibly adapt to service changes. According to the service requirements and the characteristics of the service content, formulating an appropriate broadcast strategy for broadcast control can greatly improve the utilization rate of bandwidth and meet the needs of various types of services, thereby bringing more abundant data services to CMMB.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: the present invention can still be Modifications to the specific implementation of the invention or equivalent replacement of some technical features; without departing from the spirit of the technical solution of the present invention, should be included in the scope of the technical solution claimed in the present invention.

Claims (4)

1., for a playing control system for CMMB data broadcast, it is characterized in that comprising as lower module:

Broadcasting policy generation module (1), for generating broadcast policy configuration file, and uploading to data download server;

Content obtaining module (2), for downloading the business datum and broadcast policy configuration file that need to upgrade in real time from data download server;

Broadcast tactful dlm (dynamic loading module) (3), broadcast policy configuration file for resolving and be loaded into Content Management scheduler module;

Content Management scheduler module (4), is responsible for Scheduling content item and organize content item, adopts dispatch from high to low according to priority packet for inhomogeneity content item, adopts to intersect to split scheduling for the scheduling mechanism between similar content item;

First described Content Management scheduler module meets according to priority check the content item broadcasting tactful configuration condition and also records the data volume analyzing similar content item different content again, the preferential broadcast that data volume is large, later employing intersects to split broadcasts, and Content Management scheduler module completes the broadcast of all priority queries content item by that analogy;

Broadcast control module (5), be responsible for invoking content management scheduler module and obtain broadcast policy configuration file, then obtain business tine from content obtaining module, and broadcast according to the tactful configuration condition of broadcast the content reconfigured.

2. the playing control system for CMMB data broadcast according to claim 1, is characterized in that the configuration item of described broadcast policy configuration file comprises frequency, service ID, priority, title, time started, end time, minimum transmission cycle, content, packet size and presentation mode.

3., for a broadcast control method for CMMB data broadcast, it is characterized in that comprising the steps:

First step 1, system generate and upload broadcasts policy configuration file data to data download server;

Step 2, content obtaining module obtain up-to-date business data packet from data download server and broadcast policy configuration file;

Step 3, system dynamic load broadcast policy configuration file;

Step 4, broadcast tactful dlm (dynamic loading module) resolve broadcast policy configuration file, be loaded into Content Management scheduler module after successfully resolved, loads successfully after deletion last time broadcast policy configuration file set business data packet;

First described Content Management scheduler module meets according to priority check the content item broadcasting tactful configuration condition and also records the data volume analyzing similar content item different content again, the preferential broadcast that data volume is large, later employing intersects to split broadcasts, and Content Management scheduler module completes the broadcast of all priority queries content item by that analogy;

Step 5, broadcast control module invoking content management scheduler module obtain and broadcast policy configuration file, then obtain business tine from content obtaining module, and broadcast according to the tactful configuration condition of broadcast the content reconfigured.

4. the broadcast control method for CMMB data broadcast according to claim 3, is characterized in that the configuration item of described broadcast policy configuration file comprises frequency, service ID, priority, title, time started, end time, minimum transmission cycle, content, packet size and presentation mode.