CN101198044A - Transmission method and emission system for data broadcasting service data in broadcasting system - Google Patents
Transmission method and emission system for data broadcasting service data in broadcasting system Download PDFInfo
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Abstract
The invention discloses a send method for data broadcasting service data in a broadcasting system, a transmitting method and a transmitting system. The transmitting method comprises the following steps: A. transmitting system takes the service data as data payload and packs the data payload and an extensible proposal packaging XPE head into an XPE package; the transmitting system transmits the XPE package taken as contents of data segments of multiplexing subframes to a wireless terminal; B. after the wireless terminal receives the broadcast data, the XPE package is extracted from the broadcast data and the data payload in the XPE package is processed correspondingly according to information in the XPE head. The transmitting system comprises a multiplexer, a single frequency network adapter, a plurality of modulators, a plurality of transmitters and an XPE packer. The invention has the advantages of realization of transmission of various service data in the broadcasting system by a simple, convenient, easy and uniform means, reduction of complexity of streaming media data and data service transmission technology, and strong commonality and extensible ability.
Description
Technical field
The present invention relates to field of wireless transmission, be specifically related to the transmission method and the emission system of data broadcasting service data in a kind of broadcast system.
Background technology
In the existing broadcast system, adopt the multiplex mode transmission usually for audio, video data: broadcast channel frame is made of a plurality of multiplexed frames, and each multiplexed frame is made up of multiplex frame head, one or more multiplexed sub frame and filling again.As shown in Figure 1, each multiplexed sub frame is made up of subframe head, video-frequency band, audio section and data segment again, wherein, comprises some control informations again and keep the position in the subframe head.Usually, 1 multiplexed sub frame is 1 second data code flow of 1 cover video-audio program, and wherein, the video code flow size is 384kbit, and the audio code stream size is 64kbit.
Based on existing multiplexed frame structure, need seal off refitting usually for stream medium data, the reference format of flow media data packet is transformed.For example, for RTP (RTP, Real-timeTransport Protocol) in the Streaming Media processing mode of form, usually original RTP encapsulation format of need dismantling, be reassembled into existing multiplexed frame payload, wherein, multiplexing is carried out correspondingly with RTP bag, and there is transformational relation in a load form.For the audio, video data of other form, for example the stream medium data of forms such as WINDOWS Streaming Media wmv or asf after need transforming equally, encapsulates framing again, and processing mode then is not quite similar.
When in broadcast system, the streaming media service data being transmitted, need transform, destroy intrinsic data format, on the one hand, additionally increase processing procedure at the broadcast transmission end to the stream medium data of various standards; On the other hand, also need also can increase the processing time simultaneously, cause added burden, increase the technical sophistication degree of terminal itself to terminal to the stream medium data reduction of resetting at receiving terminal.
For example, in the prior art, adopt the video coding of H264 and the audio coding of AAC, the audio, video data in each second is packed, in header packet information, add H264 frame and AAC frame relative position and the information such as relative time in whole bag.By CRC header packet information is protected.Its subject matter is, if crc error appears in the data in packet header, then lose the audio, video data of whole bag, and only stipulated the audio frequency and video form of the propagation that allows in its multiplexing standard, lack extensibility, can not be suitable for the stream medium data of multiple audio frequency and video form.
Simultaneously; based on multiplexed frame shown in Figure 1; because each multiplexed sub frame packet is excessive; only designed CRC check in each audio frequency, video, data segment header; to the not protection of the payload part of looking audio frequency, error code or packet loss appear in the data transmission procedure and after, can influence the decoding of whole packet; serious mosaic effect occurs, influence normal rating and experience.If make mistakes in packet header, need lose whole video section, audio section.
In addition, in existing broadcast system, support and ensure for the unified standard of data, services neither one, and manufacturer terminal often need be to the standard development corresponding software and hardware of new release data, services.The formulation of data, services standard no matter still be manufacturer terminal be the exploitation of a certain data, services, all consumed valuable time and human and material resources.Such pattern has restricted the release and the application of new data, services.
Therefore, fast-developing and constantly evolution along with technology in the broadcast system, need that a kind of compatibility is higher, autgmentability is better, easy unification and data transmission technology flexibly, to be suitable for the broadcast transmitted of multiple stream medium data and data, services, make in the broadcast system that data transmission quality is higher, guarantee that data correctly and efficient, have more versatility and be with good expansibility, to adapt to the evolution development of mobile multimedia broadcast system.
Summary of the invention
The technical problem to be solved in the present invention provides the transmission method and the emission system of data broadcasting service data in a kind of broadcast system, with simple and easy to do uniform way, realize the transmission of all kinds of business datums in the broadcast system, so that reduce the complexity of stream medium data and data, services transmission technology; Compatibility comprises the several data of authorization message, has very strong versatility and expandability.
In order to solve the problems of the technologies described above, the invention provides the sending method of data broadcasting service data in a kind of broadcast system, comprising:
A, emission system as payload user data, add extensible protocol encapsulation XPE head with business datum, are encapsulated as the XPE bag;
B, emission system are transferred to wireless terminal with the content of XPE bag as the data segment of multiplexed sub frame by radio network.
Further, described XPE head comprises:
Business model is indicated, and is used to represent the agreement of business datum;
Described business datum comprises stream mode data and file mode data; Described stream mode data represent in the mode of data flow, and described file mode data represent in the mode of file.
Further, step a also comprises:
Emission system is carried out forward error correction FEC check to business datum to be packaged earlier before encapsulation XPE bag, will carry out business datum after the FEC check and error correction data then as payload user data, is encapsulated as the XPE bag after adding the XPE head respectively; Described error correction data is a forward error correction information;
Described XPE head comprises: payload type is used for representing that the payload user data of this XPE bag does not carry out the business datum of FEC, the business datum of carrying out FEC or error correction data;
For payload user data is the XPE bag of business datum, and the XPE head also comprises: business model is indicated, and is used to represent the agreement of business datum;
Described business datum comprises stream mode data and file mode data; Described stream mode data represent in the mode of data flow, and described file mode data represent in the mode of file;
For payload user data is the XPE bag of error correction data, and the XPE head also comprises:
The FEC algorithm identifies, and is used to identify the type of the forward error correction algorithm that is adopted;
The FEC parameter length is used to represent the total length of data packets of FEC parameter information;
The FEC parameter is used to indicate the parameter of the forward error correction algorithm that is adopted;
Further, step a also comprises:
Emission system is carried out the cyclic check code CRC check to payload user data to be packaged earlier when encapsulation XPE bag, and after adding the CRC data behind the payload user data, is encapsulated as the XPE bag together;
Described XPE head also comprises:
The CRC indication is used to represent whether the payload of this XPE bag carried out the CRC_32 verification.
Further, step a also comprises:
Emission system when the length of data to be packaged surpasses XPE maximum data unit length, breaks data in a plurality of XPE bags when encapsulation XPE bag;
Described XPE head also comprises:
Opening flag is used for representing whether the beginning part of business datum or error correction data wraps at this XPE;
End mark is used for representing whether the latter end of business datum or error correction data wraps at this XPE;
Total length of data packets is used to represent the total length of data packets when payload user data is not cut apart.
Further, step a also comprises:
Emission system adds head H EADER in XPE bag front when encapsulation XPE bag.
Further, step b specifically comprises:
Emission system constitutes a data unit with one or more XPE bag, and one or more data cell is added that data segment header constitutes a data segment, and this data segment is added that the subframe head constitutes multiplexed sub frame; Be transferred to wireless terminal by radio network after described multiplexed sub frame further is encapsulated as broadcast channel frame;
Described data segment header comprises the parameter and the CRC of number of data units, each data cell; The parameter of described data cell comprises data unit length and data cell type.
The present invention also provides the transmission method of data broadcasting service data in a kind of broadcast system, comprising:
A, emission system as payload user data, add extensible protocol encapsulation XPE head with business datum, are encapsulated as the XPE bag; Emission system is transferred to wireless terminal with the content of XPE bag as the data segment of multiplexed sub frame by radio network;
After B, wireless terminal receive broadcast data, therefrom extract the XPE bag, and payload user data in this XPE bag is carried out respective handling according to XPE information in front.
Further, described XPE head comprises:
Business model is indicated, and is used to represent the agreement of business datum;
Described business datum comprises stream mode data and file mode data; Described stream mode data represent in the mode of data flow, and described file mode data represent in the mode of file;
Among the described step B, traffic data type during the XPE that terminal is received according to the indication of the business model in XPE head judgement wraps, the convection model data are carried out real time parsing, and the file mode data then are stored in this locality, resolve when the user browses.
Further, steps A also comprises:
Emission system is carried out forward error correction FEC check to business datum to be packaged earlier before encapsulation XPE bag, will carry out business datum after the FEC check and error correction data then as payload user data, is encapsulated as the XPE bag after adding the XPE head respectively; Described error correction data is a forward error correction information;
Described XPE head comprises: payload type is used for representing that the payload user data of this XPE bag does not carry out the business datum of FEC, the business datum of carrying out FEC or error correction data;
For payload user data is the XPE bag of business datum, and the XPE head also comprises: business model is indicated, and is used to represent the agreement of business datum;
Described business datum comprises stream mode data and file mode data; Described stream mode data represent in the mode of data flow, and described file mode data represent in the mode of file;
For payload user data is the XPE bag of error correction data, and the XPE head also comprises:
The FEC algorithm identifies, and is used to identify the type of the forward error correction algorithm that is adopted;
The FEC parameter length is used to represent the total length of data packets of FEC parameter information;
The FEC parameter is used to indicate the parameter of the forward error correction algorithm that is adopted;
Described step B also comprises: when payload user data is when carrying out the business datum of FEC, terminal is determined the FEC algorithm and the parameter that are adopted according to the error correction data that extracts, and then it is carried out FEC.
Further, steps A also comprises:
Emission system is carried out the cyclic check code CRC check to payload user data to be packaged earlier when encapsulation XPE bag, and after adding the CRC data behind the payload user data, is encapsulated as the XPE bag together;
Described XPE head also comprises:
The CRC indication is used to represent whether the payload of this XPE bag carried out the CRC_32 verification;
Described step B also comprises: if this XPE of CRC indication expression bag carried out CRC check in the XPE head, then terminal is carried out the CRC check to the payload user data in this XPE bag earlier, if correctly then extract payload user data.
Further, steps A also comprises:
Emission system when the length of data to be packaged surpasses XPE maximum data unit length, breaks data in a plurality of XPE bags when encapsulation XPE bag;
Described XPE head also comprises:
Opening flag is used for representing whether the beginning part of business datum or error correction data wraps at this XPE;
End mark is used for representing whether the latter end of business datum or error correction data wraps at this XPE;
Total length of data packets is used to represent the total length of data packets when payload user data is not cut apart;
Described step B also comprises: according to the opening flag in the XPE head and end mark judge payload user data in this XPE bag be break the time, terminal makes up the payload user data in its and other corresponding XPE bag, reverts to the preceding data that break.
Further, steps A also comprises:
Emission system adds head H EADER in XPE bag front when encapsulation XPE bag;
Described XPE head also comprises:
Verification and, be used for the XPE header is carried out verification;
Described step B also comprises: terminal at first judges whether according to the checksum field in the XPE head whether this XPE bag correctly is received; If correctly be received, then according to the payload user data in the described XPE bag of the information extraction in the XPE head; If correctly be not received, then find following XPE bag by described HEADER.
Further, in the steps A, emission system is transferred to the content of XPE bag as the data segment of multiplexed sub frame wireless terminal by radio network and is meant:
Emission system constitutes a data unit with one or more XPE bag, and one or more data cell is added that data segment header constitutes a data segment, and this data segment is added that the subframe head constitutes multiplexed sub frame; Be transferred to wireless terminal by radio network after described multiplexed sub frame further is encapsulated as broadcast channel frame;
Described data segment header comprises the parameter and the CRC of number of data units, each data cell; The parameter of described data cell comprises data unit length and data cell type.
The present invention also provides the emission system in a kind of broadcast system, comprises multiplexer;
Single frequency adapter is used to receive the data of multiplexer output, to data carry out adaptive after, it is sent by distributed network;
Several modulators are used for receiving adapted data from distributed network, and after modulating, send to continuous transmitter; And
Several transmitters are used for the signal after the modulators modulate is transferred to wireless terminal by radio network;
Also comprise: the XPE baling press, be used for business datum as payload user data, it adds that the XPE head is encapsulated as the XPE bag;
Described multiplexer is used to receive the XPE bag of XPE baling press output and it is encapsulated as multiplexed sub frame and sends to single frequency adapter.
Further, the XPE head that adds of described XPE baling press comprises:
Business model is indicated, and is used to represent the agreement of business datum;
Described business datum comprises stream mode data and file mode data; Described stream mode data represent in the mode of data flow, and described file mode data represent in the mode of file.
Further, described XPE baling press also is used for before encapsulation XPE bag business datum to be packaged being carried out the FEC check, will carry out business datum after the FEC check and error correction data then as payload user data, is encapsulated as the XPE bag after adding the XPE head respectively; Described error correction data is a forward error correction information;
The XPE head that described XPE baling press adds comprises:
Payload type is used for representing that the payload user data of this XPE bag does not carry out the business datum of FEC, the business datum of carrying out FEC or error correction data;
For payload user data is the XPE bag of business datum, and the XPE head also comprises: business model is indicated, and is used to represent the agreement of business datum;
Described business datum comprises stream mode data and file mode data; Described stream mode data represent in the mode of data flow, and described file mode data represent in the mode of file;
For payload user data is the XPE bag of error correction data, and the XPE head also comprises:
The FEC algorithm identifies, and is used to identify the type of the forward error correction algorithm that is adopted;
The FEC parameter length is used to represent the total length of data packets of FEC parameter information;
The FEC parameter is used to indicate the parameter of the forward error correction algorithm that is adopted;
Further, described XPE baling press also is used for treating the encapsulation of data payload earlier and carrying out the cyclic check code CRC check before encapsulation XPE bag, and after adding the CRC data behind the payload user data, is encapsulated as the XPE bag together;
The XPE head that described XPE baling press adds also comprises:
The CRC indication is used to represent whether the payload of this XPE bag carried out the CRC_32 verification.
Further, described XPE baling press also is used for when encapsulation XPE bag, when the length of data to be packaged surpasses XPE maximum data unit length, data is broken in a plurality of XPE bags;
The XPE head that described XPE baling press adds also comprises:
Opening flag is used for representing whether the beginning part of business datum or error correction data wraps at this XPE;
End mark is used for representing whether the latter end of business datum or error correction data wraps at this XPE;
Total length of data packets is used to represent the total length of data packets when payload user data is not cut apart.
Further, described XPE baling press also is used for adding HEADER in XPE bag front when encapsulation XPE bag.
Further, described multiplexer is encapsulated as multiplexed sub frame with described XPE bag and is meant:
One or more XPE bag is constituted a data unit, one or more data cell is added that data segment header constitutes a data segment, this data segment is added that the subframe head constitutes multiplexed sub frame; Be transferred to wireless terminal by radio network after this multiplexed sub frame further is encapsulated as broadcast channel frame; Described data segment header comprises the parameter and the cyclic check code of number of data units, each data cell; The parameter of data cell comprises data unit length and data cell type.
Technical scheme of the present invention uses the unified standard transmission to comprise the Various types of data of stream medium data, data, services, authorization message etc., and versatility, the compatibility that technical scheme therefore of the present invention can enhanced system also helps the release and the application of new data, services; And characteristics such as simple, the professional extensibility of the system that possesses skills is good, flexible and convenient to use.Further, its prioritization scheme adopts the packaged type than small data packets, guarantees that data correctly, read efficiently, improve utilization rate of channel resources.Further, its prioritization scheme is introduced measures such as CRC check, forward error correction, has improved transmission reliability.
Description of drawings
Fig. 1 is a kind of broadcasting multiplex frame structure schematic diagram in the prior art;
Fig. 2 is the concrete implementing procedure figure of the data transmission method in the broadcast system provided by the invention;
Fig. 3 is the concrete enforcement schematic diagram that the XPE bag is put into the multiplexed sub frame data segment among the present invention;
Fig. 4 is that payload is the business datum and the structural representation of XPE bag when carrying out CRC check among the present invention;
Fig. 5 is the structural representation of XPE-FEC bag among the present invention;
Fig. 6 is the concrete enforcement block diagram of emission system in a kind of broadcast system of the present invention.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
The invention provides the transmission method and the emission system of data broadcasting service data in a kind of broadcast system, realize the problem of complexity, compatibility and poor expandability at transfer of data such as stream medium data and data, services, adopt uniform way to carry out the transmission of Various types of data, its core concept is: business datum is encapsulated as XPE (extensible protocol encapsulation) bag by consolidation form, these XPE bags are transmitted by radio network as the content of the data segment of multiplexed sub frame.The business datum of transmitting comprises two classes, one class is the stream mode data, refers to that the data, services etc. as audio, video data, ECM (Entitlement Control Message), EMM (Entitlement Management Message), audio broadcasting, data flow form is presented to user business type in the data flow mode; Another kind of is the file mode data of presenting to the user with file mode, comprises the interpretive program of stream mode data, services correspondence.Can re-construct for the stream mode packet, directly be encapsulated as the XPE bag, or the payload user data in the former stream mode packet is encapsulated as the XPE bag; And also can directly be encapsulated as the XPE bag for the file mode data.
Digital Video Broadcast Handheld), MediaFLO (the single forward link of medium: Media Forward Link Only) etc. the embodiment of the invention is applicable to via satellite and/or the mobile multimedia broadcast system of signals such as terrestrial wireless emission video, audio frequency, data message, and (the digital video broadcast-handheld formula receives: as CMMB (China Mobile multimedia broadcasting) broadcast system, DVB-H.
The transmission method of data broadcasting service data comprises as shown in Figure 2 in the broadcast system of the present invention:
Emission system in A, the broadcast system adds the XPE head with business datum, be encapsulated as XPE bag after, by radio network described XPE bag is transferred to wireless terminal.
The described business datum of the embodiment of the invention comprises stream mode data and file mode data; The described stream mode data of the embodiment of the invention represent in the mode of data flow, have sequential requirement, the free label indication of transmission or data flow inside usually synchronous requirement is arranged; The described file mode data of the embodiment of the invention then represent in the mode of discrete file, do not have sequential usually and require, transmit no time tag indication or requirement synchronously.
For data, services, wherein not the content of transmitting in the data flow mode: as content of changeless content and less renewal etc., as the file mode transfer of data; The content of transmitting in the data flow mode is then as the stream mode transfer of data.
Stream medium data---as audio, video data, authorization message all as the stream mode transfer of data.
This step also is the sending method of data broadcasting service data in the broadcast system provided by the invention simultaneously.
This step can may further comprise the steps:
Emission system in A1, the broadcast system as payload user data, adds that the XPE head is encapsulated as the XPE bag with business datum.
In this step, emission system can be carried out FEC (forward error correction) check to business datum to be packaged earlier before encapsulation XPE bag, will carry out then being encapsulated as the XPE bag after business datum after the FEC check and error correction data add the XPE head respectively as payload user data.The XPE bag of encapsulation error correction data is called the XPE-FEC bag, and the XPE head that XPE-FEC is wrapped is called the XPE-FEC head; Described error correction data is a forward error correction information.
In this step, emission system can be when encapsulation XPE bag, and elder generation is to payload user data to be packaged---and be that business datum and/or error correction data carry out the cyclic check code CRC check, and after adding the CRC data behind the payload user data, be encapsulated as the XPE bag together; Be to comprise XPE head, payload user data and CRC data in each XPE bag.Described CRC data can but be not limited to 32 CRC_32 data.
In this step, emission system can be in encapsulation XPE when bag, when data to be packaged---and be the length of business data packet or error correction data when surpassing XPE maximum data unit length (4096 byte), then cut apart, can be in a plurality of XPE bags with the data partition.As can be seen, XPE bag is a kind of packaged type of small data packets, replaces big code stream encapsulation format of the prior art with this packaged type, can guarantee that data correctly, be read efficiently.
In this step, emission system can add the HEADER (head) of 4 BYTE in encapsulation XPE when bag in XPE bag front, can find following XPE bag by this HEADER at XPE wrongheaded the time like this.
The described XPE head of the embodiment of the invention can comprise in the following field any one or several:
Opening flag is used for representing that whether the beginning part of business datum or error correction data is at this XPE bag (comprising the XPE-FEC bag); Can but be not limited to take 1.Can define: this field value " 1 " represents that this XPE wraps the beginning part of carrying business datum or error correction data in (comprising the XPE-FEC bag), and the beginning part of value " 0 " expression business datum or error correction data is in this XPE bag (comprising that XPE-FEC wraps).
End mark is used for representing that whether the latter end of business datum or error correction data is at this XPE bag (comprising the XPE-FEC bag); Can but be not limited to take 1.Can define: this field value " 1 " represents that this XPE bag is carrying (comprising the XPE-FEC bag) latter end of business datum or error correction data, and the latter end of value " 0 " expression business datum/error correction data is not in this XPE bag (comprising the XPE-FEC bag).
Do not break such as a business data packet, all be encapsulated in the XPE bag, then the value of opening flag and end mark is " 1 ".
If business datum/error correction data is not broken, then can there be this two fields.
Payload type is used for representing that the payload user data of this XPE bag (comprising the XPE-FEC bag) does not carry out the business datum of FEC, carried out business datum, or the error correction data of FEC; Can but be not limited to take 2.Can define: this field value " 00 " expression payload user data is not for carrying out the business datum of FEC; Value " 01 " expression payload user data is the business datum of carrying out FEC; Value " 10 " expression payload user data is an error correction data; " 11 " keep.
Payload length is used to represent the payload length that this XPE bag (comprising the XPE-FEC bag) carries, and unit is a byte; Can but be not limited to take 12, span 0～4095.If business datum or error correction data are cut apart, then this field is the total length of data packets of business datum or error correction data.
The CRC indication is used to represent whether the payload of this XPE bag (comprising the XPE-FEC bag) carried out the CRC_32 verification; Can but be not limited to take 1.Can define: this field value " 0 " represents that the payload of this XPE bag (comprising the XPE-FEC bag) does not carry out the CRC_32 verification, value " 1 " represents that the payload of this XPE bag (comprising the XPE-FEC bag) carries out the CRC_32 verification, and in this XPE bag (comprising the XPE-FEC bag), have the CRC_32 data behind the payload user data.
Package identification is used to identify the XPE bag; Can but be not limited to take 7, circulation increases progressively and adds 1 value in 0～127 scope, initial value is 0.
Total length of data packets has only when business datum or error correction data are cut apart and just need transmit this field; Be used to represent the total length of data packets when payload user data is not cut apart, unit is a byte; Can but be not limited to take 16, span 0～65535.If business datum or error correction data are not cut apart, then do not transmit this field, payload length field is promptly represented the total length of data packets of business datum or error correction data.
Business model indication, this field are only used in the XPE bag of payload as business datum, are used to represent the agreement of business datum; Can but be not limited to take 1.Can define: this field value " 0 " expression business datum is the stream mode data; Value " 0 " expression business datum is the file mode data.
Keep the position, can but be not limited to take 7.
FEC algorithm sign, this field are only used at the XPE bag of payload as error correction data---and be in the XPE-FEC bag, be used to identify the type of the forward error correction algorithm that is adopted; Can but be not limited to take 8.Can define: RS (255,191) is adopted in this field value " 0x00 " expression; Other is worth reservation.
FEC parameter length, this field are only used in the XPE-FEC bag, are used to represent the total length of follow-up forward error correction parameter information, and unit is a byte; Can but be not limited to take 8, span 0～255.
FEC parameter, this field are only used in the XPE-FEC bag, are used to indicate the parameter of the forward error correction algorithm that is adopted.Relevant to error correction algorithm in front of the grammer of this field, length is specified by " FEC parameter length " field.During the definition forward error correction algorithm, need define this field simultaneously.
Verification and, be used for XPE head (comprising the XPE-FEC head) information is carried out verification, be the value that all bytes of this field front are carried out the XOR computing.
Payload be business datum and the bag of the XPE when carrying out CRC check as shown in Figure 4; The XPE-FEC bag as shown in Figure 5.
A2, emission system are transferred to wireless terminal as the content of the data segment of multiplexed sub frame by radio network with the XPE bag.
Owing to can position by the multiplexed sub frame head, so the realization of XPE head can compare flexibly, according to the difference of actual conditions and the different XPE head of preseting length during such as no CRC, can not add the CRC indication field in the XPE head.
Specifically comprise in this step: emission system constitutes a data unit with one or more XPE bag, one or more data cell is added that data segment header constitutes a data segment, this data segment is added that the subframe head constitutes multiplexed sub frame, as shown in Figure 3.Emission system is transferred to wireless terminal by radio network after described multiplexed sub frame further is encapsulated as broadcast channel frame.
The described data segment header of the embodiment of the invention can comprise the parameter and the CRC (cyclic check code) of number of data units, each data cell.The parameter of the described data cell of the embodiment of the invention can comprise data unit length and data cell type.The described data cell type of the embodiment of the invention can but be not limited to be defined as: wrap for XPE in value " 160 " the expression data cell; Be the XPE-FEC bag in value " 161 " the expression data cell.
After B, wireless terminal receive broadcast data, therefrom extract the XPE bag, and payload user data in this XPE bag is carried out respective handling according to XPE information in front.
Specifically, terminal at first judges whether according to the checksum field in the XPE head whether this XPE bag correctly is received; If correctly be received, then according to the payload user data in the described XPE bag of the information extraction in the XPE head.If correctly be not received, and when before the XPE bag HEADER being arranged, terminal can find following XPE bag by described HEADER.
If this XPE of CRC indication expression bag carried out CRC check in the XPE head, then terminal is carried out the CRC check to the payload user data in this XPE bag earlier, if correctly then extract payload user data.
If payload user data is the business datum of carrying out FEC, then terminal is carried out FEC to it then according to definite FEC algorithm and the parameter that is adopted of the error correction data that extracts.
According to the opening flag in the XPE head and end mark judge payload user data in this XPE bag be break the time, terminal makes up the payload user data in its and other corresponding XPE bag, reverts to the preceding data that break.
Traffic data type in the XPE bag that is received is judged in indication according to the business model in the XPE head, and the convection model data are carried out real time parsing, and the file mode data then are stored in this locality, resolve when the user browses.
The present invention also provides the emission system in a kind of broadcast system, as shown in Figure 6, comprises XPE baling press, multiplexer, single frequency adapter and some modulators and some transmitters.
The described XPE baling press of the embodiment of the invention is used for business datum is added that the XPE head is encapsulated as the XPE bag.
The described XPE baling press of the embodiment of the invention can also be used for before encapsulation XPE bag, business datum to be packaged is carried out FEC (forward error correction) check, will carry out then being encapsulated as the XPE bag after business datum after the FEC check and error correction data add the XPE head respectively as payload user data.The XPE bag of encapsulation error correction data is called the XPE-FEC bag, and the XPE head that XPE-FEC is wrapped is called the XPE-FEC head; Described error correction data is a forward error correction information.
The described XPE baling press of the embodiment of the invention can also be used for before encapsulation XPE bag, earlier business datum to be packaged and/or error correction data are carried out the cyclic check code CRC check, and after adding the CRC data behind business datum or the error correction data, be encapsulated as the XPE bag together.
The described XPE baling press of the embodiment of the invention can also be used for when data to be packaged---as business data packet or error correction data---length when surpassing XPE maximum data unit length (4096 byte), with business data packet or error correction data partition in a plurality of XPE bags.
The described XPE baling press of the embodiment of the invention can also be used for adding the HEADER (head) of 4 BYTE in XPE bag front when encapsulation XPE bag.
Described XPE head no longer repeats here with above described.
The described multiplexer of the embodiment of the invention is used to receive the XPE bag of XPE baling press output and send to single frequency adapter; Can also be used for described XPE bag is encapsulated as multiplexed sub frame earlier, send to single frequency adapter after further being encapsulated as broadcast channel frame again.
The described multiplexer of the embodiment of the invention with XPE bag be encapsulated as multiplexed sub frame can but be not limited to be meant: one or more XPE bag is constituted a data unit, one or more data cell is added that data segment header constitutes a data segment, this data segment is added that the subframe head constitutes multiplexed sub frame; Described data segment header comprises the parameter and the cyclic check code of number of data units, each data cell; The parameter of described data cell can comprise data unit length and data cell type.Described data cell type is with above described.
The described single frequency adapter of the embodiment of the invention is used to receive the data of multiplexer output, to data carry out adaptive after, it is sent to modulator by distributed network.
The described modulator of the embodiment of the invention is used for receiving adapted data from distributed network, and after modulating, sends to continuous transmitter.
The described transmitter of the embodiment of the invention is used for the signal after the modulators modulate is sent to by radio network the wireless terminal of broadcast system.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (21)
1. the sending method of data broadcasting service data in the broadcast system is characterized in that, comprising:
A, emission system as payload user data, add extensible protocol encapsulation XPE head with business datum, are encapsulated as the XPE bag;
B, emission system are transferred to wireless terminal with the content of XPE bag as the data segment of multiplexed sub frame by radio network.
2. sending method as claimed in claim 1 is characterized in that, described XPE head comprises:
Business model is indicated, and is used to represent the agreement of business datum;
Described business datum comprises stream mode data and file mode data; Described stream mode data represent in the mode of data flow, and described file mode data represent in the mode of file.
3. sending method as claimed in claim 1 is characterized in that step a also comprises:
Emission system is carried out forward error correction FEC check to business datum to be packaged earlier before encapsulation XPE bag, will carry out business datum after the FEC check and error correction data then as payload user data, is encapsulated as the XPE bag after adding the XPE head respectively; Described error correction data is a forward error correction information;
Described XPE head comprises: payload type is used for representing that the payload user data of this XPE bag does not carry out the business datum of FEC, the business datum of carrying out FEC or error correction data;
For payload user data is the XPE bag of business datum, and the XPE head also comprises: business model is indicated, and is used to represent the agreement of business datum;
Described business datum comprises stream mode data and file mode data; Described stream mode data represent in the mode of data flow, and described file mode data represent in the mode of file;
For payload user data is the XPE bag of error correction data, and the XPE head also comprises:
The FEC algorithm identifies, and is used to identify the type of the forward error correction algorithm that is adopted;
The FEC parameter length is used to represent the total length of data packets of FEC parameter information;
The FEC parameter is used to indicate the parameter of the forward error correction algorithm that is adopted;
4. as each described sending method in the claim 1 to 3, it is characterized in that step a also comprises:
Emission system is carried out the cyclic check code CRC check to payload user data to be packaged earlier when encapsulation XPE bag, and after adding the CRC data behind the payload user data, is encapsulated as the XPE bag together;
Described XPE head also comprises:
The CRC indication is used to represent whether the payload of this XPE bag carried out the CRC_32 verification.
5. as each described sending method in the claim 1 to 3, it is characterized in that step a also comprises:
Emission system when the length of data to be packaged surpasses XPE maximum data unit length, breaks data in a plurality of XPE bags when encapsulation XPE bag;
Described XPE head also comprises:
Opening flag is used for representing whether the beginning part of business datum or error correction data wraps at this XPE;
End mark is used for representing whether the latter end of business datum or error correction data wraps at this XPE;
Total length of data packets is used to represent the total length of data packets when payload user data is not cut apart.
6. as each described sending method in the claim 1 to 3, it is characterized in that step a also comprises:
Emission system adds head H EADER in XPE bag front when encapsulation XPE bag.
7. as each described sending method in the claim 1 to 3, it is characterized in that step b specifically comprises:
Emission system constitutes a data unit with one or more XPE bag, and one or more data cell is added that data segment header constitutes a data segment, and this data segment is added that the subframe head constitutes multiplexed sub frame; Be transferred to wireless terminal by radio network after described multiplexed sub frame further is encapsulated as broadcast channel frame;
Described data segment header comprises the parameter and the CRC of number of data units, each data cell; The parameter of described data cell comprises data unit length and data cell type.
8. the transmission method of data broadcasting service data in the broadcast system is characterized in that, comprising:
A, emission system as payload user data, add extensible protocol encapsulation XPE head with business datum, are encapsulated as the XPE bag; Emission system is transferred to wireless terminal with the content of XPE bag as the data segment of multiplexed sub frame by radio network;
After B, wireless terminal receive broadcast data, therefrom extract the XPE bag, and payload user data in this XPE bag is carried out respective handling according to XPE information in front.
9. transmission method as claimed in claim 8 is characterized in that, described XPE head comprises:
Business model is indicated, and is used to represent the agreement of business datum;
Described business datum comprises stream mode data and file mode data; Described stream mode data represent in the mode of data flow, and described file mode data represent in the mode of file;
Among the described step B, traffic data type during the XPE that terminal is received according to the indication of the business model in XPE head judgement wraps, the convection model data are carried out real time parsing, and the file mode data then are stored in this locality, resolve when the user browses.
10. transmission method as claimed in claim 8 is characterized in that steps A also comprises:
Emission system is carried out forward error correction FEC check to business datum to be packaged earlier before encapsulation XPE bag, will carry out business datum after the FEC check and error correction data then as payload user data, is encapsulated as the XPE bag after adding the XPE head respectively; Described error correction data is a forward error correction information;
Described XPE head comprises: payload type is used for representing that the payload user data of this XPE bag does not carry out the business datum of FEC, the business datum of carrying out FEC or error correction data;
For payload user data is the XPE bag of business datum, and the XPE head also comprises: business model is indicated, and is used to represent the agreement of business datum;
Described business datum comprises stream mode data and file mode data; Described stream mode data represent in the mode of data flow, and described file mode data represent in the mode of file;
For payload user data is the XPE bag of error correction data, and the XPE head also comprises:
The FEC algorithm identifies, and is used to identify the type of the forward error correction algorithm that is adopted;
The FEC parameter length is used to represent the total length of data packets of FEC parameter information;
The FEC parameter is used to indicate the parameter of the forward error correction algorithm that is adopted;
Described step B also comprises: when payload user data is when carrying out the business datum of FEC, terminal is determined the FEC algorithm and the parameter that are adopted according to the error correction data that extracts, and then it is carried out FEC.
11., it is characterized in that steps A also comprises as each described transmission method in the claim 8 to 10:
Emission system is carried out the cyclic check code CRC check to payload user data to be packaged earlier when encapsulation XPE bag, and after adding the CRC data behind the payload user data, is encapsulated as the XPE bag together;
Described XPE head also comprises:
The CRC indication is used to represent whether the payload of this XPE bag carried out the CRC_32 verification;
Described step B also comprises: if this XPE of CRC indication expression bag carried out CRC check in the XPE head, then terminal is carried out the CRC check to the payload user data in this XPE bag earlier, if correctly then extract payload user data.
12., it is characterized in that steps A also comprises as each described transmission method in the claim 8 to 10:
Emission system when the length of data to be packaged surpasses XPE maximum data unit length, breaks data in a plurality of XPE bags when encapsulation XPE bag;
Described XPE head also comprises:
Opening flag is used for representing whether the beginning part of business datum or error correction data wraps at this XPE;
End mark is used for representing whether the latter end of business datum or error correction data wraps at this XPE;
Total length of data packets is used to represent the total length of data packets when payload user data is not cut apart;
Described step B also comprises: according to the opening flag in the XPE head and end mark judge payload user data in this XPE bag be break the time, terminal makes up the payload user data in its and other corresponding XPE bag, reverts to the preceding data that break.
13., it is characterized in that steps A also comprises as each described transmission method in the claim 8 to 10:
Emission system adds head H EADER in XPE bag front when encapsulation XPE bag;
Described XPE head also comprises:
Verification and, be used for the XPE header is carried out verification;
Described step B also comprises: terminal at first judges whether according to the checksum field in the XPE head whether this XPE bag correctly is received; If correctly be received, then according to the payload user data in the described XPE bag of the information extraction in the XPE head; If correctly be not received, then find following XPE bag by described HEADER.
14., it is characterized in that in the steps A, emission system is transferred to the content of XPE bag as the data segment of multiplexed sub frame wireless terminal by radio network and is meant as each described transmission method in the claim 8 to 10:
Emission system constitutes a data unit with one or more XPE bag, and one or more data cell is added that data segment header constitutes a data segment, and this data segment is added that the subframe head constitutes multiplexed sub frame; Be transferred to wireless terminal by radio network after described multiplexed sub frame further is encapsulated as broadcast channel frame;
Described data segment header comprises the parameter and the CRC of number of data units, each data cell; The parameter of described data cell comprises data unit length and data cell type.
15. the emission system in the broadcast system comprises multiplexer;
Single frequency adapter is used to receive the data of multiplexer output, to data carry out adaptive after, it is sent by distributed network;
Several modulators are used for receiving adapted data from distributed network, and after modulating, send to continuous transmitter; And
Several transmitters are used for the signal after the modulators modulate is transferred to wireless terminal by radio network;
It is characterized in that, also comprise:
The XPE baling press is used for business datum as payload user data, and it adds that the XPE head is encapsulated as the XPE bag;
Described multiplexer is used to receive the XPE bag of XPE baling press output and it is encapsulated as multiplexed sub frame and sends to single frequency adapter.
16. emission system as claimed in claim 15 is characterized in that, the XPE head that described XPE baling press adds comprises:
Business model is indicated, and is used to represent the agreement of business datum;
Described business datum comprises stream mode data and file mode data; Described stream mode data represent in the mode of data flow, and described file mode data represent in the mode of file.
17. emission system as claimed in claim 15 is characterized in that:
Described XPE baling press also is used for before encapsulation XPE bag business datum to be packaged being carried out the FEC check, will carry out business datum after the FEC check and error correction data then as payload user data, is encapsulated as the XPE bag after adding the XPE head respectively; Described error correction data is a forward error correction information;
The XPE head that described XPE baling press adds comprises:
Payload type is used for representing that the payload user data of this XPE bag does not carry out the business datum of FEC, the business datum of carrying out FEC or error correction data;
For payload user data is the XPE bag of business datum, and the XPE head also comprises: business model is indicated, and is used to represent the agreement of business datum;
Described business datum comprises stream mode data and file mode data; Described stream mode data represent in the mode of data flow, and described file mode data represent in the mode of file;
For payload user data is the XPE bag of error correction data, and the XPE head also comprises:
The FEC algorithm identifies, and is used to identify the type of the forward error correction algorithm that is adopted;
The FEC parameter length is used to represent the total length of data packets of FEC parameter information;
The FEC parameter is used to indicate the parameter of the forward error correction algorithm that is adopted;
18., it is characterized in that as each described emission system in the claim 15 to 17:
Described XPE baling press also is used for treating the encapsulation of data payload earlier and carrying out the cyclic check code CRC check before encapsulation XPE bag, and after adding the CRC data behind the payload user data, is encapsulated as the XPE bag together;
The XPE head that described XPE baling press adds also comprises:
The CRC indication is used to represent whether the payload of this XPE bag carried out the CRC_32 verification.
19., it is characterized in that as each described emission system in the claim 15 to 17:
Described XPE baling press also is used for when encapsulation XPE bag, when the length of data to be packaged surpasses XPE maximum data unit length, data is broken in a plurality of XPE bags;
The XPE head that described XPE baling press adds also comprises:
Opening flag is used for representing whether the beginning part of business datum or error correction data wraps at this XPE;
End mark is used for representing whether the latter end of business datum or error correction data wraps at this XPE;
Total length of data packets is used to represent the total length of data packets when payload user data is not cut apart.
20., it is characterized in that as each described emission system in the claim 15 to 17:
Described XPE baling press also is used for adding HEADER in XPE bag front when encapsulation XPE bag.
21., it is characterized in that described multiplexer is encapsulated as multiplexed sub frame with described XPE bag and is meant as each described emission system in the claim 15 to 17:
One or more XPE bag is constituted a data unit, one or more data cell is added that data segment header constitutes a data segment, this data segment is added that the subframe head constitutes multiplexed sub frame; Be transferred to wireless terminal by radio network after this multiplexed sub frame further is encapsulated as broadcast channel frame; Described data segment header comprises the parameter and the cyclic check code of number of data units, each data cell; The parameter of data cell comprises data unit length and data cell type.
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| CN 200710179586 CN100579222C (en) | 2007-12-14 | 2007-12-14 | Transmission method and emission system for data broadcasting service data in broadcasting system |
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| CN 200710179586 CN100579222C (en) | 2007-12-14 | 2007-12-14 | Transmission method and emission system for data broadcasting service data in broadcasting system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101330398B (en) * | 2008-07-25 | 2010-06-16 | 中兴通讯股份有限公司 | Method for transmitting business data flow |
| CN101883272A (en) * | 2010-06-09 | 2010-11-10 | 清华大学 | Multi-service adaptation method based on DTMB (Digital Television Terrestrial Multimedia Broadcasting) single-frequency network system and implementation device thereof |
| CN108173807A (en) * | 2017-11-28 | 2018-06-15 | 贵阳语玩科技有限公司 | Unified message is sent, processing method and processing device |
| CN109889267A (en) * | 2018-09-28 | 2019-06-14 | 曹一宁 | Sending method, optical label and the barcode scanning equipment of encoded information based on optic communication |
| CN110099036A (en) * | 2018-01-31 | 2019-08-06 | 国广融合（北京）传媒科技发展有限公司 | A kind of data encapsulation method based on fusion Transmission system |
-
2007
- 2007-12-14 CN CN 200710179586 patent/CN100579222C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101330398B (en) * | 2008-07-25 | 2010-06-16 | 中兴通讯股份有限公司 | Method for transmitting business data flow |
| CN101883272A (en) * | 2010-06-09 | 2010-11-10 | 清华大学 | Multi-service adaptation method based on DTMB (Digital Television Terrestrial Multimedia Broadcasting) single-frequency network system and implementation device thereof |
| CN108173807A (en) * | 2017-11-28 | 2018-06-15 | 贵阳语玩科技有限公司 | Unified message is sent, processing method and processing device |
| CN110099036A (en) * | 2018-01-31 | 2019-08-06 | 国广融合（北京）传媒科技发展有限公司 | A kind of data encapsulation method based on fusion Transmission system |
| CN109889267A (en) * | 2018-09-28 | 2019-06-14 | 曹一宁 | Sending method, optical label and the barcode scanning equipment of encoded information based on optic communication |
| CN109889267B (en) * | 2018-09-28 | 2020-09-29 | 曹一宁 | Method for sending coded information based on optical communication, optical label and code scanning equipment |
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| Publication number | Publication date |
|---|---|
| CN100579222C (en) | 2010-01-06 |
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