CN1960502B - Fault-tolerance method in mobile multimedia broadcast system - Google Patents
Fault-tolerance method in mobile multimedia broadcast system Download PDFInfo
- Publication number
- CN1960502B CN1960502B CN2006101409552A CN200610140955A CN1960502B CN 1960502 B CN1960502 B CN 1960502B CN 2006101409552 A CN2006101409552 A CN 2006101409552A CN 200610140955 A CN200610140955 A CN 200610140955A CN 1960502 B CN1960502 B CN 1960502B
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- China
- Prior art keywords
- frame
- multiplexed
- information
- head
- multiplexed frame
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/1863—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast comprising mechanisms for improved reliability, e.g. status reports
- H04L12/1877—Measures taken prior to transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0079—Formats for control data
- H04L1/008—Formats for control data where the control data relates to payload of a different packet
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0072—Error control for data other than payload data, e.g. control data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
- H04W28/14—Flow control between communication endpoints using intermediate storage
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
Abstract
The method comprises: 1) recording the protection information of current multiplexing frame in frame header of each multiplexing frame in mobile multimedia broadcast; 2) adding a filling in the tail of each multiplexing frame; the filling comprises the protection information of next multiplexing frame; 3) when the multimedia broadcast terminal receives a multiplexing frame, the filling portion of the multiplexing frame is putted into buffer area to make buffer, and is provided for the next multiplexing frame; when the terminal receives the next multiplexing frame, it compares the header information of next multiplexing frame with the information in the buffer; when finding an error in the header information of the multiplexing frame, using the buffered protection information to make decode process so as to improve the system survivability.
Description
Technical field
The invention belongs to Mobile Multimedia Broadcasting or technical field of mobile TV, specially refer to a kind of fault-tolerance approach that realizes mobile multimedia broadcast system.
Background technology
Mobile Multimedia Broadcasting is a kind of Play Technique for Multimedia of rising in recent years.By hand-held terminal, under the situation of high-speed mobile, can watch TV.Terminal receives programme by wireless protocols, and can select the channel of oneself having the right to watch, thereby can accept to select the multi-medium data of channel, is implemented in and sees TV on the portable terminal.
The audio, video data of Mobile Multimedia Broadcasting all frame by frame mode encapsulates, if a part in the frame is made mistakes some important data particularly, as length information, to lead to errors and in entire frame, spread, cause that data can not be correctly decoded in the frame, will have a strong impact on watching of user.Mobile multimedia broadcast system transmits audio, video data by wireless channel or satellite channel, because the characteristic that this on-air radio transmits, the data of transmission are subjected to various interference easily, cause transmission information to be made mistakes.Therefore should adopt certain method to come error correction in the mobile multimedia broadcast system, reduce the error rate of transfer system, realize the good reception of terminal, allow the user can experience the desirable effect of watching.
Summary of the invention
Purpose of the present invention just is to provide a kind of fault-tolerance approach of mobile multimedia broadcast system, increases the error correcting capability of system, improves the fault-tolerant ability of multi-media broadcasting system, allows user experience better watch effect.
Technical scheme of the present invention is as follows:
A kind of fault-tolerance approach of mobile multimedia broadcast system is characterized in that:
The protection information of notebook multiplexed frame in the frame head of each multiplexed frame of Mobile Multimedia Broadcasting, the protection information of described multiplexed frame comprises the length of multiplex frame head length, multiplexed sub frame 1;
Afterbody at each multiplexed frame increases a filling, and this filling comprises the protection information of next multiplexed frame.
Wherein, comprise a plurality of multiplexed sub frames in each multiplexed frame, the protection information of notebook multiplexed sub frame in the subframe head of each multiplexed sub frame.
Wherein, when mobile multi-media broadcast terminal receives a multiplexed frame, the protection information in the filling of this multiplexed frame is put into buffering area carry out buffer memory, use for next multiplexed frame.
Wherein, when terminal is received next multiplexed frame, the information of buffer memory in header information in next multiplexed frame and the buffer is compared, the header information in finding multiplexed frame occurs when wrong, adopts the multiplexed frame head information of buffer memory to carry out demultiplexing and handles; Perhaps multimedia broadcast channels provides the channel error indication information, and when this multiplexed frame was wrong in transport process, multi-media broadcast terminal used the multiplexed frame head information in the buffering area to carry out demultiplexing and handles.
The protection information of above-mentioned multiplexed frame comprises information such as the length, multiplexed frame relevant parameter of length, the subframe of frame head.
The protection information of above-mentioned multiplexed sub frame comprises information such as the head length degree, video-data fragment indication, audio data section indication, the indication of ancillary data section of multiplexed sub frame; The protection information of multiplexed sub frame also includes extended field, includes video data segment length, voice data segment length, ancillary data segment length in the extended field.
The all or part of information that comprises the frame head of next multiplexed frame in the described filling, and all or part of information of the subframe head of next multiplexed sub frame.
Method provided by the invention belongs to a kind of media data fault-tolerance approach that is adapted at using in the radio network, important information in the frame head of multiplexed frame is retransmitted, when mistake appears in the frame head information of a frame wherein, can utilize the filling information in the previous frame of buffer memory to decode, thereby strengthened the error correcting capability of system, improved the fault-tolerant ability of multi-media broadcasting system, can allow user experience better watch effect.
Description of drawings
Figure 1 shows that the structure of multiplex frame head
Figure 2 shows that the structure of multiplexed sub frame
Figure 3 shows that the structure of the expansion area of multiplexed sub frame head
Figure 4 shows that the structure of a multiplexed frame
Figure 5 shows that the interstitital texture of multiplexed frame
Embodiment
Figure 1 shows that the structure of multiplex frame head.In mobile multimedia broadcast system, video data, voice data, ancillary data are packaged together becomes the Payload of a frame, adds that contents composition frame heads such as length information and media parameter become complete multiplexed frame and transmit in mobile multimedia broadcast system.Owing in the frame head important contents such as multiplex frame head length, multiplexed sub frame 1 length, multiplexed frame relevant parameter are arranged, therefore in frame head, increase the important information that error correction is protected head, form the protection information of multiplexed frame.
Figure 2 shows that the structure of multiplexed sub frame.Comprise a plurality of multiplexed sub frames in the multiplexed frame, also include the head length degree, video-data fragment indication, audio data section indication, the indication of ancillary data section etc. of multiplexed sub frame in the head of multiplexed sub frame.
Figure 3 shows that the structure of the expansion area of multiplexed sub frame head.Also include extended field in the head of multiplexed sub frame, important informations such as the video data segment length of multiplexed sub frame, voice data segment length, ancillary data segment length are placed in this extended field.
Important informations such as the length of multiplexed frame and multiplexed sub frame and indication, do not recover if in the wireless transmission passage of multi-media broadcasting system, be interfered, to cause multiplexed frame or multiplexed sub frame mistake to be delimited, the data that receive can't be correctly decoded, influence the decoding effect of audio frequency and video, on video, can present mosaic phenomenon, noise is arranged in the audio frequency.For addressing this problem, the afterbody that the information that these are important is attached to a last multiplexed frame transmits.
Figure 4 shows that the structure of a multiplexed frame.The broadcast channel frame of Mobile Multimedia Broadcasting is made up of a plurality of multiplexed frames, and multiplexed frame is made up of multiplex frame head, multiplexing payload and filling.
Wherein multiplexing payload is made up of multiplexed sub frame; filling part is made up of the protection information of next frame; the filling part of multiplexed frame 0 is the protection information in the multiplexed frame 1; the filling part of multiplexed frame 1 is the protection information in the multiplexed frame 2; the filling part of multiplexed frame 2 is the protection information in the multiplexed frame 3, and the like.
Figure 5 shows that the interstitital texture of multiplexed frame.The filling part of the afterbody of this multiplexed frame is made up of the multiplex frame head of next frame and the frame head of multiplexed sub frame, also can be that the partial information of frame head of next frame and the partial information of multiplexed sub frame frame head are formed, for example extract the length information part in next frame multiplexed frame and the multiplexed sub frame, in the filling part of this frame, transmit.
When multi-media broadcast terminal receives multiplexed frame, the filling part of multiplexed frame is put into buffering area carry out buffer memory, use for next multiplexed frame, can utilize the information of buffer memory in header information in the multiplexed frame and the buffer to compare when receiving next multiplexed frame, when finding that this multiplexed frame head information mistake occurs because of various interference, can adopt the multiplexed frame head information of buffer memory to carry out the demultiplexing processing; Multimedia broadcast channels also can provide the channel error indication information, when multi-media broadcast terminal finds that this multiplexed frame is in transport process when wrong, in time use the multiplexed frame head information in the buffering area to carry out the demultiplexing processing, the error code during shielding transmits, thus improve system survivability.
Claims (9)
1. the fault-tolerance approach of a mobile multimedia broadcast system is characterized in that:
The protection information of notebook multiplexed frame in the frame head of each multiplexed frame of Mobile Multimedia Broadcasting, the protection information of described multiplexed frame comprises multiplex frame head length, multiplexed sub frame 1 length;
Afterbody at each multiplexed frame increases a filling, and this filling comprises the protection information of next multiplexed frame.
2. method according to claim 1 is characterized in that, comprises a plurality of multiplexed sub frames in each multiplexed frame, the protection information of notebook multiplexed sub frame in the subframe head of each multiplexed sub frame.
3. method according to claim 1 is characterized in that, when mobile multi-media broadcast terminal receives a multiplexed frame, the protection information in the filling of this multiplexed frame is put into buffering area carry out buffer memory, uses for next multiplexed frame.
4. method according to claim 2 is characterized in that, the protection information of described multiplexed sub frame comprises the head length degree of multiplexed sub frame, video-data fragment indication, audio data section indication, the indication of ancillary data section.
5. method according to claim 2 is characterized in that, the protection information of described multiplexed sub frame also includes extended field, includes video data segment length, voice data segment length, ancillary data segment length in the extended field.
6. method according to claim 1 is characterized in that, described filling comprises all or part of information of the frame head of next multiplexed frame.
7. method according to claim 1 is characterized in that, described filling comprises all or part of information of the subframe head of next multiplexed sub frame.
8. method according to claim 3, it is characterized in that, when terminal is received next multiplexed frame, the information of buffer memory in header information in next multiplexed frame and the buffer is compared, when mistake appears in the header information in finding multiplexed frame, adopt the multiplexed frame head information of buffer memory to carry out the demultiplexing processing.
9. method according to claim 3, it is characterized in that, multimedia broadcast channels provides the channel error indication information, and when this multiplexed frame was wrong in transport process, multi-media broadcast terminal used the multiplexed frame head information in the buffering area to carry out demultiplexing and handles.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101409552A CN1960502B (en) | 2006-10-16 | 2006-10-16 | Fault-tolerance method in mobile multimedia broadcast system |
| PCT/CN2006/003763 WO2008046268A1 (en) | 2006-10-16 | 2006-12-30 | A method for fault tolerating in the mobile multimedia broadcast system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101409552A CN1960502B (en) | 2006-10-16 | 2006-10-16 | Fault-tolerance method in mobile multimedia broadcast system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1960502A CN1960502A (en) | 2007-05-09 |
| CN1960502B true CN1960502B (en) | 2010-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101409552A Expired - Fee Related CN1960502B (en) | 2006-10-16 | 2006-10-16 | Fault-tolerance method in mobile multimedia broadcast system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1960502B (en) |
| WO (1) | WO2008046268A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2178237A1 (en) * | 2008-10-20 | 2010-04-21 | Thomson Licensing | Method for encoding and decoding signalling information |
| CN101938640A (en) * | 2009-06-29 | 2011-01-05 | 中兴通讯股份有限公司 | Method for improving broadcast channel frame utilization factor, application method of filing part and device |
| CN105764147B (en) * | 2016-02-05 | 2019-11-08 | 北京佰才邦技术有限公司 | The acquisition methods and terminal of the length information of subframe |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1352850A (en) * | 1999-05-10 | 2002-06-05 | 三星电子株式会社 | Apparatus and method for exchanging variable-length data according to radio link protocol in mobile communication system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2266644A (en) * | 1992-04-25 | 1993-11-03 | Plessey Telecomm | Overhead transmissions in a data communication system |
| US6885679B1 (en) * | 2000-09-29 | 2005-04-26 | Nortel Networks Limited | System and method for layer 2 frame delineation recovery |
| CN100414859C (en) * | 2002-06-12 | 2008-08-27 | 电子科技大学 | Method for controlling bit after frame end insertion in OFDM communication system |
| WO2004042991A1 (en) * | 2002-11-08 | 2004-05-21 | Infineon Technologies Ag | A method of error control coding and decoding of messages in a packet-based data transmission system |
-
2006
- 2006-10-16 CN CN2006101409552A patent/CN1960502B/en not_active Expired - Fee Related
- 2006-12-30 WO PCT/CN2006/003763 patent/WO2008046268A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1352850A (en) * | 1999-05-10 | 2002-06-05 | 三星电子株式会社 | Apparatus and method for exchanging variable-length data according to radio link protocol in mobile communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1960502A (en) | 2007-05-09 |
| WO2008046268A1 (en) | 2008-04-24 |
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