CN101179586A - TS stream based media access control method - Google Patents
TS stream based media access control method Download PDFInfo
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- CN101179586A CN101179586A CNA2006101378728A CN200610137872A CN101179586A CN 101179586 A CN101179586 A CN 101179586A CN A2006101378728 A CNA2006101378728 A CN A2006101378728A CN 200610137872 A CN200610137872 A CN 200610137872A CN 101179586 A CN101179586 A CN 101179586A
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Abstract
The invention relates to a media access control method based on the TS stream, which describes the hierarchical structure of the media access control and the function system of the MAC (Media Access Control).The hierarchical structure is simply divided and has strong maneuverability, and the integration with the network is sufficiently taken into account for the hierarchical structure; the functions of the MAC include the dynamic bandwidth allocation mechanism between the broadcasting service streams, the terminal energy-saving mechanism and the multiplexing and demultiplexing mechanism of multi-way programs, thus implementing the flexible and efficient management of the channel resources. The media access control method based on the TS stream is not only suitable for the broadband wireless multimedia network, but also is suitable for all the networks provided with the broadcasting services.
Description
Technical field
The present invention relates to DMB, relate more specifically to the broadcasting service in ground digital television broadcast, ground digital sound radio and the various broadband radio multi-media network.
Background technology
Along with the development of information age, people to the demand of information also in rapidly rising.The information requirement of the so-called personalization of people is exactly the demand to Voice ﹠ Video after all.And its irreplaceable advantage is arranged for unified sound, the Video service broadcast mode that sends simultaneously.At first, because its traffic carrying capacity relative fixed, so the wireless resource scheduling management is simple, system complexity is lower, has saved cost greatly.Secondly, he is not subjected to the user to insert the restriction of quantity, does not have " hot-zone " effect of network.So the favor that utilizes broadcast mode to provide multimedia service more and more to be subjected to industry, nearly all network of WiMAX service that provides is all in intercommunication or the fusion of consideration with radio network.
Address that need and trend, the present invention proposes a kind of control method that inserts based on the broadcast type multimedia service of TS stream.
Summary of the invention
■ the disclosed embodiments have been told about, the ergasia of the hierarchical structure of this medium access control and MAC (Media AccessControl).Hierarchical structure is divided simple, workable and has been taken into full account fusion with network; The function of MAC comprises that the multiplexing and demultiplexing of Dynamic Bandwidth Allocation mechanism between the broadcasting service stream, terminal power-saving mechanism, multi-channel program is machine-processed, thus realized to channel resource flexibly, management efficiently.Media access control method based on TS stream is not only applicable to the broadband radio multi-media network, also is fit to all and has the network of broadcasting service.
The advantage of disclosed this media access control method: taken into full account under the miscellaneous service granularity the channel resource operability of the management and the network integration efficiently flexibly, and two-way interaction formula safety certification and the encryption function broadcasted.
Description of drawings
Below in conjunction with the disclosed invention of description of drawings in this manual, in the accompanying drawing:
Fig. 1 is the hierarchical structure of medium access control
Fig. 2 is the media access control sublayer main functional modules
Embodiment
Specifically describe the application's many novel part below.
Fig. 1 describes the hierarchical structure of medium access control:
Whole medium access control process is divided into two sublayers and handles in this method of ■.It comprises Convergence Sublayer (Convergence Sub-Layer) and Media Access Control (MACSub-layer) two parts.
The ■ Convergence Sublayer is assigned to the multiplex data stream of network layer in the corresponding logic channel.The logic channel here is exactly the sign of logically dividing to each road multi-medium data.
The ■ Media Access Control is mainly finished: two-way authentication that the QOS of each road multi-medium data (Quality OfService) demand, service insert and encryption (this module is optional, can select to use in bilateral network), increase the mapping to physical channel of the multiplexing and demultiplexing of extra forward error correction (FEC), multichannel logical channel data and logic channel at different physical channels.
Fig. 2 describes the media access control sublayer main functional modules:
■ Convergence Sublayer service definition: the Convergence Sublayer function is the data that network layer is sent here, is divided into multimedia service data and professional multiple connection control information (SI/PSI) two parts; And these business datums are mapped in the different logic channels with relevant professional multiple connection control information.Multimedia service data is the IP stream that comes from different program encoder; Professional multiple connection control information is the program access control information that is generated from the MBMS service device.
The part that ■ PSI increases:
Program classification table (PCT-Program Classification Table): this table is generated by the MBMS service device, indicates program category (audio frequency, video, text etc.), code check and QOS grade separation from each road program encoder.
Channel resource table (CRT-Channel Resource Table): this table is generated by the MBMS service device, indicates the channel resource that can be used for broadcast service in the current network.
■ logic channel mapping:, the multichannel multimedia service data is mapped among the different Logical_channel goes according to the program category table.eg：channe11、channe12.........
■ QOS management and information security encapsulation:, distinguish each road multimedia service data according to the classification of the program category table among the PSI to every road program QOS.The business that last these different Q OS requires will be handled at the information security package module.
■ MPE-FEC: this is an optional module.And the multi-medium data on the different channels is carried out extra FEC.
■ channel resource management and distribution: according to channel resource table and type of service table the business of different code checks is multiplexed to the data that are fit to the physical channel transmission, in order to improve channel utilization.As have vacant position and to fill out 0 processing.At last the good data block of these multiple connections is mapped in the corresponding physical channel.And, be packaged in the PSI information and transmit the form of the map information of the multiple connection information of data block and physical channel with MAC message.
■ framing: the data encapsulation in each physical channel is become the TS bag.
Claims (9)
1. media access control method based on TS stream:
This method of ■ is divided into two sublayers to whole medium access control process and handles.It comprises Convergence Sublayer (Convergence Sub-Layer) and Media Access Control (MACSub-layer) two parts.
The ■ Convergence Sublayer is assigned to the multiplex data stream of network layer in the corresponding logic channel.The logic channel here is exactly the sign of logically dividing to each road multi-medium data.
The ■ Media Access Control is mainly finished: two-way authentication that the QOS of each road multi-medium data (Quality OfService) demand, service insert and encryption (this module is optional, can select to use in bilateral network), increase the mapping to physical channel of the multiplexing and demultiplexing of extra forward error correction (FEC), multichannel logical channel data and logic channel at different physical channels.
Last all control datas of ■ and multimedia service data all are packaged into the TS bag, and consign to physical layer process with the form of TS stream.
2.MAC the sublayer comprises following several sections:
■ Convergence Sublayer service definition: the Convergence Sublayer function is the data that network layer is sent here, is divided into multimedia service data and professional multiple connection control information (SI/PSI) two parts; And these business datums are mapped in the different logic channels with relevant professional multiple connection control information.Multimedia service data is the IP stream that comes from different program encoder; Professional multiple connection control information is the program access control information that is generated from the MBMS service device.
The part that ■ PSI increases:
Program classification table (PCT-Program Classification Table): this table is generated by the MBMS service device, indicates program category (audio frequency, video, text etc.), code check and QOS grade separation from each road program encoder.
Channel resource table (CRT-Channel Resource Table): this table is generated by the MBMS service device, indicates the channel resource that can be used for broadcast service in the current network.
■ logic channel mapping:, the multichannel multimedia service data is mapped among the different Logical_channel goes according to the program category table.eg：channel1、channel2.........
■ QOS management and information security encapsulation:, distinguish each road multimedia service data according to the classification of the program category table among the PSI to every road program QOS.The business that last these different Q OS requires will be handled at the information security package module.
■ MPE-FEC: this is an optional module.And the multi-medium data on the different channels is carried out extra FEC.
■ channel resource management and distribution: according to channel resource table and type of service table the business of different code checks is multiplexed to the data that are fit to the physical channel transmission, in order to improve channel utilization.As have vacant position and to fill out 0 processing.At last the good data block of these multiple connections is mapped in the corresponding physical channel.And, be packaged in the PSI information and transmit the form of the map information of the multiple connection information of data block and physical channel with MAC message.
■ framing: the data encapsulation in each physical channel is become the TS bag.
3. the method for claim 1, the division of medium access control process.
4. the method for claim 1, the functional definition of Convergence Sublayer (Convergence Sub-Layer) and Media Access Control (MAC Sub-layer).
5. method as claimed in claim 2, the service definition of Convergence Sublayer.
6. method as claimed in claim 2, two special menus (PCT, CRT) that PSI increases, and definition.
7. method as claimed in claim 2, QOS management and information security encapsulation process process.
8. method as claimed in claim 2, extra forward error correction coding tupe.
9. method, channel resource management and the method for salary distribution as claimed in claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101378728A CN101179586A (en) | 2006-11-08 | 2006-11-08 | TS stream based media access control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101378728A CN101179586A (en) | 2006-11-08 | 2006-11-08 | TS stream based media access control method |
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| CN101179586A true CN101179586A (en) | 2008-05-14 |
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| CNA2006101378728A Pending CN101179586A (en) | 2006-11-08 | 2006-11-08 | TS stream based media access control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599842B (en) * | 2008-06-03 | 2011-12-28 | 联想(北京)有限公司 | Method, network and gateway for transmitting broadcast programs |
| CN106576189A (en) * | 2014-08-28 | 2017-04-19 | 松下知识产权经营株式会社 | Transmission method, reception method, transmission device, and reception device |
-
2006
- 2006-11-08 CN CNA2006101378728A patent/CN101179586A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599842B (en) * | 2008-06-03 | 2011-12-28 | 联想(北京)有限公司 | Method, network and gateway for transmitting broadcast programs |
| CN106576189A (en) * | 2014-08-28 | 2017-04-19 | 松下知识产权经营株式会社 | Transmission method, reception method, transmission device, and reception device |
| CN106576189B (en) * | 2014-08-28 | 2020-11-10 | 松下知识产权经营株式会社 | Transmission method, reception method, transmission device, and reception device |
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Open date: 20080514 |