CN102957942B - The methods, devices and systems of data are transmitted in DMB - Google Patents
The methods, devices and systems of data are transmitted in DMB Download PDFInfo
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- CN102957942B CN102957942B CN201110240269.3A CN201110240269A CN102957942B CN 102957942 B CN102957942 B CN 102957942B CN 201110240269 A CN201110240269 A CN 201110240269A CN 102957942 B CN102957942 B CN 102957942B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/42—Arrangements for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
- H04N21/6131—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a mobile phone network
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Business, Economics & Management (AREA)
- General Business, Economics & Management (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Time-Division Multiplex Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The embodiment of the present invention proposes a kind of method that data are transmitted in DMB, comprises the following steps：DMB transmitting terminal generation transmitting data frame distribution information, and transmitting data frame distribution information is sent to DMB receiving terminal, information is distributed according to transmitting data frame by DMB receiving terminal, optionally business datum is received from DMB transmitting terminal.The embodiment of the present invention also proposed system, DMB transmitting terminal and the DMB receiving terminal that data are transmitted in a kind of DMB.Using the embodiment of the present invention, the purpose of reduction operation of receiver energy consumption can be reached.
Description
Technical field
The present invention relates to DMB technical field, specifically, the present invention relates in DMB
Transmit the methods, devices and systems of data.
Background technology
DMB (Digital Multimedia Broadcasting, DMB) is that communication and broadcast are blended
New ideas Multimedia Mobile broadcast service.This technology can also pass through in addition to supporting traditional audio broadcasting
The various ways such as MPEG-4H.264 and MPEG-2, AAC+, a variety of Transmitting of Multi-media Information such as transport information and news to movement
There is provided high-quality tonequality and diversified data, services in terminal.
The characteristics of DMB is maximum be exactly with broadcast, it is point to multi--point, one point-to-area, broadcast message
Cost is unrelated with number of users.Therefore, DMB as ICT industry an important component, in country
Information infrastructure building, realize in universal service and national information security strategy have critical role.
In digital multimedia broadcasting system, due to the characteristic of the point to multi--point of information transfer, in broadcast downlink
The data of transmission include all customer data information, in spite of need will be to the data of downlink for receiver
Received, retained after reception for desired data, unexpected data are lost.This requires receiver to locate always
In working condition, no matter whether what is currently transmitted is the desired business datum of receiver, receiver must all connect to it
Receive, therefore receiver needs larger energy consumption in this case.In the case where receiver is mobile terminal, this lasting place
It certainly will cause the increase of the mobile terminal power consumption in the situation of working condition, and because its working time is by battery capacity
Limitation, energy consumption directly affects terminal capabilities.
The content of the invention
It is contemplated that at least solve or slow down one of above-mentioned technological deficiency, it is many especially by numeral proposed by the present invention
The methods, devices and systems of data are transmitted in media broadcast, to reduce power consumption.
In order to achieve the above object, an aspect of of the present present invention proposes the side that data are transmitted in a kind of DMB
Method, comprises the following steps：
DMB transmitting terminal generation transmitting data frame distribution information, and distribute information by the transmitting data frame
DMB receiving terminal is sent to, information is distributed according to the transmitting data frame by DMB receiving terminal,
Optionally business datum is received from the DMB transmitting terminal.
Another aspect of the present invention proposes the system that data are transmitted in a kind of DMB, and the system includes numeral
Multimedia broadcasting transmitting terminal and DMB receiving terminal, wherein：
DMB transmitting terminal, for generating transmitting data frame distribution information, and the transmitting data frame is divided
DMB receiving terminal is sent to information；
DMB receiving terminal, for distributing information according to the transmitting data frame, optionally from the number
Word multimedia broadcasting transmitting terminal receives business datum.
Another aspect of the present invention also proposed a kind of DMB transmitting terminal, including：Data frame distributes information
Processing unit, physical signalling frame Multi-connection unit and rf transmitter unit, wherein：
Data frame distributes information process unit, for generating transmitting data frame distribution information, and to the transmitting data frame
Distribution information carries out channel coding, Bit Interleave and symbol mapping processing successively；
Physical signalling frame Multi-connection unit, for by after above-mentioned channel coding, Bit Interleave and symbol mapping processing
It is physical signalling frame that transmitting data frame, which distributes information with business datum multiple connection, and the physical signalling frame is sent into radio-frequency transmissions
Unit；
Rf transmitter unit, for the physical signalling frame to be sent.
Another aspect of the present invention also proposed a kind of DMB receiving terminal, including transmitting data frame distribution letter
Resolution unit and business datum receiving unit are ceased, wherein：
Transmitting data frame distributes information resolution unit, for receiving the biography being generated by it from DMB transmitting terminal
Transmission of data frame distributes information, and during parsing work of the transmitting data frame distribution information to determine to receive business datum and not
During the inoperative for receiving business datum；
Business datum receiving unit, for when during the work, DMB to be received to correspond to and transmitted
Data frame distributes the business datum of information, and when not during the work, DMB does not receive business datum.
In technical scheme proposed by the present invention, DMB transmitting terminal generation transmitting data frame distribution information, this
Information can be corresponding reception processing, therefore digital many matchmakers with designation number multimedia broadcasting receiving terminal to purpose logic frame data
Body broadcast reception end is not blindly to receive data, but optionally can be received from the DMB transmitting terminal
Business datum, such as close its operational module during non-purpose logical frame, therefore, it is possible to reach reduction operation of receiver energy consumption
Purpose.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and be readily appreciated that, wherein：
Fig. 1 for the embodiment of the present invention DMB in transmit data method flow diagram；
Fig. 2 is logical frame of the embodiment of the present invention and physical layer frame structure schematic diagram；
Fig. 3 is subframe structure schematic diagram of the embodiment of the present invention；
Fig. 4 is the schematic diagram of the subframe method of salary distribution 1 of the embodiment of the present invention 1；
Fig. 5 is the schematic diagram of the subframe method of salary distribution 2 of the embodiment of the present invention 2；
Fig. 6 is the schematic diagram of the subframe method of salary distribution 3 of the embodiment of the present invention 3；
Fig. 7 reduces power consumption schematic diagram for the receiver of the embodiment of the present invention；
Fig. 8 for the embodiment of the present invention DMB in transmit data system structure diagram；
Fig. 9 is the DMB sending end structure schematic diagram of the embodiment of the present invention；
Figure 10 is the DMB sending end structure detailed maps of the embodiment of the present invention；
Figure 11 is the DMB receiving terminal structural representation of the embodiment of the present invention；
Figure 12 receives end structure detailed maps for the DMB of the embodiment of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
In order to realize the purpose of the present invention, embodiments of the invention propose in a kind of DMB and transmit data
Method.
As shown in figure 1, comprising the following steps：
S101：DMB transmitting terminal generation transmitting data frame distribution information, and the transmitting data frame is divided
DMB receiving terminal is sent to information.
Herein, it is preferable that DMB is digital audio broadcasting or DVB.But, it is of the invention
Digital audio broadcasting or DVB are not limited to, but some static media (Still can also be embodied
Media) broadcast.Static media refer to content will not over time and change digital multimedia, such as text and picture.
In one embodiment, when DMB is digital audio broadcasting, wherein transmitting data frame is distributed
Information, which is sent to DMB receiving terminal, can specifically include following steps：
DMB transmitting terminal carries out channel coding, Bit Interleave successively to transmitting data frame distribution information
With symbol mapping processing；DMB transmitting terminal will be by above-mentioned channel coding, Bit Interleave and symbol mapping processing
Transmitting data frame distribution information and the business datum multiple connection afterwards is physical signalling frame, and the physical signalling frame is sent to
DMB receiving terminal.
Preferably, the transmitting data frame after above-mentioned channel coding, Bit Interleave and symbol mapping processing is distributed and believed
Breath is that physical signalling frame specifically may comprise steps of with the business datum multiple connection：By it is described by above-mentioned channel coding,
Transmitting data frame distribution information after Bit Interleave and symbol mapping processing constitutes logical frame with the business datum；Patrolled described
Collect frame and be mapped as physical signalling frame, and sent.
Preferably, 4 physical signalling frames can constitute a physics superframe, and each physical signalling frame can include 4
Individual physical sub-frame.Each physical sub-frame can include 1 beacon symbols and Sn OFDM symbol；4 continuous logic frame groups
Into a logic superframe, each logical frame includes 4 continuous logic subframes, and each physical sub-frame includes 1 beacon symbols and Sn
Individual OFDM symbol.
More specifically, each OFDM symbol preferably includes 36 bits, and to the bit included by each OFDM symbol
C0~c35 is explained in detail as follows：
Wherein：
c0~c1Represent the position of current physical layer signal frame；
c2~c3Represent present sub-frame position；
c4~c5Represent the subframe method of salary distribution；
c6~c7Represent that transmitting data frame distributes the modulation system of information；
c8~c9Represent the modulation system of business datum；
c10~c11Represent that the hierarchical modulation of business datum is indicated；
c12Represent the coding of business datum using the instruction uniformly protected；
c13~c14Represent the LDPC encoder bit rates of business datum；
c15~c16Represent the LDPC encoder bit rates of business datum；
c17~c26Represent to retain Rfa；
c27~c29Represent CRC check position；
c30~c35Represent to retain Rfu.
In a preferred embodiment, put in order, patrolled described according to 4 continuous logic subframes in the logical frame
4 logic subframes are mapped as 4 physical sub-frames in physical signalling frame in collecting in frame, and wherein Sn is 56.
In a further advantageous embodiment, with 8 continuous logic subframes in 4 continuous logic frames in every 2 logical frames
It is for group, the logic subframe in the group is interlaced, and the interlaced logic subframe of the group is mapped as 2 continuous physicals letters
Number frame, wherein Sn is 111.
In a further advantageous embodiment, using 4 continuous logic frames as group, by i-th in each logical frame in the group
Logic subframe is sequentially mapped to i-th of physical signalling frame, and wherein i is 1,2,3 or 4.
Although constituting a physics superframe in above step with 4 physical signalling frames, each physical signalling frame includes 4
The present invention is elaborated exemplified by individual physical sub-frame, it will be appreciated by those of skill in the art that the present invention does not limit to
A physics superframe is constituted in 4 physical signalling frames, being also not limited to each physical signalling frame includes 4 physical sub-frames.
Substantially, the physical signalling frame number of a physics superframe, and the physical sub-frame number included by each physical signalling frame are constituted
Mesh can be carried out change, and the implication of the bit of OFDM symbol and every bit can make certain conversion.
In the case that subframe is not 4, the logic subframe in each logical frame be assigned in physical layer frame remain in that before and after it is suitable
Sequence is constant just can be with.
S102：Information is distributed according to the transmitting data frame by DMB receiving terminal, optionally from described
DMB transmitting terminal receives business datum.
Herein, specifically can be with step：It is true that DMB receiving terminal distributes information according to the transmitting data frame
Surely during the inoperative for not receiving during receiving the work of business datum and business datum；When during the work, numeral
Multimedia broadcasting, which is received, corresponds to the business datum that transmitting data frame distributes information, and when not during the work, numeral is more
Media broadcast does not receive business datum.
Illustrated further below with reference to the preferred embodiment that accompanying drawing is applied to digital audio broadcast system to the present invention.
Fig. 2 is logical frame of the embodiment of the present invention and physical layer frame structure schematic diagram；Fig. 3 is subframe structure of the embodiment of the present invention
Schematic diagram.
As shown in Figures 2 and 3, the digital audio broadcast system transmission structure based on OFDM include four layers, respectively superframe,
Frame, subframe and OFDM symbol.It is made up of, is made up of per frame 4 subframes 4 frames per superframe.Superframe length is 2560ms, Mei Gechao
Frame is made up of 4 length for 640ms physical layer signal frame, and each physical layer signal frame includes the son that 4 length are 160ms
Frame, each subframe includes 1 beacon and SNIndividual OFDM symbol.Each physical layer signal frame carries the data of a logical frame.Its
In, logic frame structure and physical layer signal frame structure are shown in Fig. 2, and the structure chart of subframe is shown in Fig. 3, S in these figuresNValue is referring to table 1.
Table 1
Logical frame is the data frame before subframe is distributed, and includes synchronizing information, system information, business description information and business
Data etc..Each logical frame includes 4 logic subframes, and each logic subframe includes 1 beacon symbols and SNIndividual OFDM symbol.It is right
Four continuous logical frame F1F2F3F4In logic subframe SFp,q(p=1,2,3,4, q=1,2,3,4) carries out subframe distribution,
SFp,qRepresent q-th of logic subframe in p-th of logical frame.
Wherein c0~c5Bit definitions are as follows：
c0~c1：Position of the current physical layer signal frame in a superframe, 00 represents the 1st frame；01 represents the 2nd frame；10 tables
Show the 3rd frame；11 represent the 4th frame.c2~c3：Position of the present sub-frame in a physical layer signal frame, 00 represents the 1st subframe；01
Represent the 2nd subframe；10 represent the 3rd subframe；11 represent the 4th subframe.c4~c5：The subframe method of salary distribution, 00 retains；01 represents subframe
The method of salary distribution 1；10 represent the subframe method of salary distribution 2；11 represent the subframe method of salary distribution 3.
Preferably, the present invention can be shown in Fig. 4, Fig. 5 and Fig. 6 using three kinds of different subframe methods of salary distribution, each method of salary distribution.
Fig. 4 is the schematic diagram of the subframe method of salary distribution 1 of the embodiment of the present invention 1.In Fig. 4, the subframe method of salary distribution 1 does not change in each logical frame
Four original orders of logic subframe.Specifically, put in order according to 4 continuous logic subframes in the logical frame, will
4 logic subframes are mapped as 4 physical sub-frames in physical signalling frame in the logical frame, and wherein Sn is 56.
Fig. 5 is the schematic diagram of the subframe method of salary distribution 2 of the embodiment of the present invention 2.In Figure 5, the subframe method of salary distribution 2 is by 4 companies
Each logic subframe in every 2 continuous logical frames in continuous logical frame constitutes physical layer letter in the way of shown in Fig. 5
Number frame.Specifically, 8 continuous logic subframes using in 4 continuous logic frames in every 2 logical frames is groups, by patrolling in the group
Collect subframe interlaced, and the interlaced logic subframe of the group is mapped as 2 continuous physical signal frames, wherein Sn is 111.
Fig. 6 is the schematic diagram of the subframe method of salary distribution 3 of the embodiment of the present invention 3.The subframe method of salary distribution 3 is by 4 continuous logics
Each logic subframe of frame constitutes physical layer signal frame in the way of shown in Fig. 6.Specifically, using 4 continuous logic frames as group,
I-th of logic subframe in each logical frame in the group is sequentially mapped to i-th of physical signalling frame, wherein i is 1,2,3 or 4.
Table 2 is preferred value of the OFDM symbol number in these three subframe methods of salary distribution of each subframe.
Table 2
| Parameter | Symbol | Transmission mode 1 | Transmission mode 2 | Transmission mode 3 |
| The OFDM symbol number of each subframe | SN | 56 | 111 | 61 |
As can be seen here, when applying the present invention to digital audio broadcasting field, in the method for the embodiment of the present invention, root first
According to distribution state of the digital audio broadcasting transmitting terminal to multiple logical frame data transmission times, in the transmitting terminal digital audio broadcasting
Form the transmitting data frame for distributing control for control logic frame and distribute information, and carry out channel coding to it, Bit Interleave with
Symbol maps；Then formed together with being multiplexed into other pilot frequency informations and business information and send signal frame and according to transmitting data frame
Distribute information and correspondence frame transmission is carried out to broadcast singal；Then in system receiving terminal elapsed time and Frequency Synchronization, channel estimation
With it is balanced after extract carrying transmitting data frame distribute information demodulating data symbols；Then the symbol is deinterleaved again
With decoded operation；And extraction logic frame distributes related control information from the transmitting data frame distribution information after decoding, and adjust
Whole operation of receiver on off state and the corresponding reception processing of purpose logical frame execution.Pass through the present invention method, energy
Enough indicate that receiver is effectively handled receive information, therefore can be widely applied to digital multimedia broadcasting system, reduce
Receiver energy consumption.
Based on foregoing detailed description, Fig. 7 reduces power consumption schematic diagram for the receiver of the embodiment of the present invention.
As shown in fig. 7, such as current goal business datum is logical frame 1 and is transmitted according to the subframe method of salary distribution 2, then
Receiver need to only carry out signal reception in 1 and 3 subframes of the first two physical signalling frame of each superframe, and remaining time is equal
Signal can not be received, so as to realize the reception of target service and the purpose of reduction operation of receiver energy consumption.
The invention also provides the system that data are transmitted in a kind of DMB.Fig. 8 is the embodiment of the present invention
The system structure diagram of data is transmitted in DMB.
As shown in figure 8, the system includes DMB transmitting terminal 810 and DMB receiving terminal 820.
DMB transmitting terminal 810, for generating transmitting data frame distribution information, and by the transmitting data frame
Distribution information is sent to DMB receiving terminal；
DMB receiving terminal 820, for distributing information according to the transmitting data frame, optionally from described
DMB transmitting terminal receives business datum.
In said system, DMB is preferably digital audio broadcasting.When for digital audio broadcasting, numeral
Multimedia broadcasting transmitting terminal 810, can be used for carrying out channel coding, Bit Interleave successively to transmitting data frame distribution information
Handled with symbol mapping, and the transmitting data frame after above-mentioned channel coding, Bit Interleave and symbol mapping processing is distributed
Information is physical signalling frame with the business datum multiple connection, and the physical signalling frame is sent into DMB reception
End 820.
In one embodiment, DMB transmitting terminal 810, for passing through above-mentioned channel coding, ratio by described
Transmitting data frame distribution information after spy's intertexture and symbol mapping processing constitutes logical frame with the business datum, and is patrolled described
Collect frame and be mapped as physical signalling frame, and sent；The wherein 4 physical signalling frames constitute a physics superframe, each thing
Managing signal frame includes 4 physical sub-frames, and each physical sub-frame includes 1 beacon symbols and Sn OFDM symbol；4 described continuous
Logical frame constitutes a logic superframe, and each logical frame includes 4 continuous logic subframes, and each physical sub-frame includes 1 beacon
Symbol and Sn OFDM symbol.
Wherein, each OFDM symbol includes bit c0~c35；
Wherein：
c0~c1Represent the position of current physical layer signal frame；
c2~c3Represent present sub-frame position；
c4~c5Represent the subframe method of salary distribution；
c6~c7Represent that transmitting data frame distributes the modulation system of information；
c8~c9Represent the modulation system of business datum；
c10~c11Represent that the hierarchical modulation of business datum is indicated；
c12Represent the coding of business datum using the instruction uniformly protected；
c13~c14Represent the LDPC encoder bit rates of business datum；
c15~c16Represent the LDPC encoder bit rates of business datum；
c17~c26Represent to retain Rfa；
c27~c29Represent CRC check position；
c30~c35Represent to retain Rfu.
In one embodiment, DMB transmitting terminal 810, for continuously being patrolled according to 4 in the logical frame
Volume subframe is put in order, and 4 logic subframes in the logical frame are mapped as to 4 physics in physical signalling frame
Frame, wherein Sn are 56.
In another embodiment, DMB transmitting terminal 810, for being patrolled with every 2 in 4 continuous logic frames
8 continuous logic subframes of volume frame in are group, and the logic subframe in the group is interlaced, and by the interlaced logic of the group
Subframe is mapped as 2 continuous physical signal frames, and wherein Sn is 111.
In another embodiment, DMB transmitting terminal 810 is stated, for using 4 continuous logic frames as group, inciting somebody to action
I-th of logic subframe in the group in each logical frame is sequentially mapped to i-th of physical signalling frame, and wherein i is 1,2,3 or 4.
Preferably, when DMB is digital audio broadcasting, DMB receiving terminal 820 is used for
The inoperative of business datum is not received during distributing the work that information determines reception business datum according to the transmitting data frame and
Period；And when during the work, DMB, which is received, corresponds to the business number that transmitting data frame distributes information
According to when not during the work, DMB does not receive business datum.
As can be seen here, in embodiments of the present invention, receiver selectivity can be indicated using transmitting data frame distribution information
Ground receives purpose logic frame data, its operational module is closed during non-purpose logical frame, so as to reduce operation of receiver energy consumption.
Specifically, the system according to the present invention can define the transmitting data frame distribution for indicating logical frame distribution in transmitting terminal
Letter, and it is encoded, interweave and mapped with symbol, this transmitting data frame distribution information is risen with other business datums one
Send；Receive transmitting data frame distribution information to obtain transmitting terminal on multiple logical frame assignments in the receiver of receiving terminal
Status information, receives machine purpose logic frame data according to this information butt joint and does corresponding reception processing, during non-purpose logical frame
Its operational module is closed, so as to reach the purpose of reduction operation of receiver energy consumption.
The invention also provides a kind of DMB transmitting terminal.
Fig. 9 is the DMB sending end structure schematic diagram of the embodiment of the present invention.As shown in figure 9, including：Data
Frame distribution information process unit 910, physical signalling frame Multi-connection unit 920 and rf transmitter unit 930, wherein：
Data frame distributes information process unit 910, for generating transmitting data frame distribution information, and to the transmission data
Frame distribution information carries out channel coding, Bit Interleave and symbol mapping processing successively；
Physical signalling frame Multi-connection unit 920, for will by above-mentioned channel coding, Bit Interleave and symbol mapping processing after
Transmitting data frame distribution information and business datum multiple connection be physical signalling frame, and the physical signalling frame is sent to radio frequency hair
Penetrate unit 930；
Rf transmitter unit 930, for the physical signalling frame to be sent.
Based on logical construction shown in Fig. 9, Figure 10 is detailed for the DMB sending end structure of the embodiment of the present invention
Schematic diagram.
In Fig. 10, most of functions of modules is functional module commonly used in the art, at this to its function without repeating.
However, convolutional coded bits interweave and constellation mapping block 101 completes to distribute letter to the transmitting data frame of transmitting terminal
The channel coding of breath, Bit Interleave maps with symbol, preceding 6 bit information c0- in 36 system informations shown in foregoing table 2
The distribution control information of c5 formation logical frames.Logical frame framing subframe distribution physical layer signal frame module 102 will reflect by symbol
Together with system information symbol after penetrating is multiplexed into other pilot frequency informations and business information, and letter is controlled according to the distribution of logical frame
Breath carries out subframe distribution and physical layer signal framing operation (in i.e. foregoing table 2 shown in c0-c5 bits) to logical signal frame, wherein
Channel coding uses constraint length for 7 1/4 convolutional code, and the corresponding octal system generator polynomial of encoder of convolutional code is：
133,171,145,133, shift register initial value is complete " 0 ".System information shown in every 36 tables 2 independently carries out convolution
Coding.The low level of system information bit streams is in preceding, i.e. c0Preceding.Wherein：System information by convolutional encoding is handed over using bit
Knit, interweave and carried out in units of interleaving block, its interleaving algorithm is as follows：If the list entries before interweaving isWherein NMUXIt is 144 for the length of interleaving block, the output sequence after intertexture is：Then zn'=zR(n), wherein R (n) can try to achieve according to following algorithm：
Wherein, p (0)=0, p (i)=(5 × p (i-1)+q) mods, (i ≠ 0),Q=s/4-1.
System information, which is fixed, uses QPSK mapping modes.Bit stream v after Bit Interleave0,v1,v2... it is mapped as
QPSK symbol streams are sent, and various symbols mapping adds the power normalization factor, and the mean power for mapping various symbols is convergent.Star
Power normalization factor-beta is included in seat figure, when QPSK maps
The embodiment of the present invention also proposed a kind of DMB receiving terminal.Figure 11 is the numeral of the embodiment of the present invention
Multimedia broadcasting receiving terminal structural representation.
As shown in figure 11, the DMB receiving terminal includes the He of transmitting data frame distribution information resolution unit 1110
Business datum receives Unit 1120, wherein：
Transmitting data frame distribution information resolution unit 1110, is generated by it for being received from DMB transmitting terminal
Transmitting data frame distribution information, and during parsing work of the transmitting data frame distribution information to determine to receive business datum
During the inoperative for not receiving business datum；
Business datum receiving unit 1120, for when during the work, DMB reception to correspond to
Transmitting data frame distributes the business datum of information, and when not during the work, DMB does not receive business number
According to.
Based on logical construction shown in Figure 10, it is detailed that Figure 12 receives end structure for the DMB of the embodiment of the present invention
Schematic diagram.
In fig. 12, most of functions of modules is functional module commonly used in the art, for example, data subcarrier as depicted
Module 207, de-interleaving block 208, decoding module 209 are provided, at this to its function without repeating.
However, timing and frequency synchronization module 202 using the beacon signal deadline in Fig. 2 and Fig. 3 subframe structures and
Frequency Synchronization；Channel estimation and equalization module 203 completes channel estimation and equalization using the pilot signal received in signal；Transmission
The module of data frame distribution information symbol extraction module 204 extracts the demodulating data symbols of the system information shown in carrying table 2；Solution
Interweave and folding coding is carried out to symbolic information with folding coding module 205；Logical frame distributes control information 206 from decoded 36
The control bit information needed for logical frame distribution is extracted in bit system information, is transmitted to subframe switch control 201.
It is appreciated that in the multi-carrier digital broadcast system based on OFDM, by the transmitting data frame for playing control action
The transmission of information is distributed, the processing of receiver can be effectively controlled, and reduction operation of receiver time, drop can easily be reached
The purpose of low energy consumption.Fixed terminal and/or movement of this method suitable for satellite broadcasting and terrestrial wireless broadcast system are eventually
End.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (19)
1. the method for data is transmitted in a kind of DMB, it is characterised in that comprise the following steps：
DMB transmitting terminal generation transmitting data frame distribution information, and transmitting data frame distribution information is sent
To DMB receiving terminal, information, selection are distributed according to the transmitting data frame by DMB receiving terminal
Property from the DMB transmitting terminal receive business datum；
Wherein, it is described that transmitting data frame distribution information is sent to number when the DMB is digital audio broadcasting
Word multimedia broadcasting receiving terminal comprises the following steps：
DMB transmitting terminal carries out channel coding, Bit Interleave and symbol successively to transmitting data frame distribution information
Number mapping processing；
DMB transmitting terminal by by above-mentioned channel coding, Bit Interleave and symbol mapping processing after transmission data
It is physical signalling frame that frame, which distributes information and the business datum multiple connection, and it is wide that the physical signalling frame is sent into digital multimedia
Broadcast receiving terminal；
Wherein, the transmitting data frame by after above-mentioned channel coding, Bit Interleave and symbol mapping processing distributes information
It is that physical signalling frame comprises the following steps with the business datum multiple connection：
By it is described by above-mentioned channel coding, Bit Interleave and symbol mapping processing after transmitting data frame distribution information with it is described
Business datum constitutes logical frame；
The logical frame is mapped as physical signalling frame, and sent；
The wherein 4 physical signalling frames constitute a physics superframe, and each physical signalling frame includes 4 physical sub-frames, each
Physical sub-frame includes 1 beacon symbols and Sn OFDM symbol；
4 continuous logic frames constitute a logic superframe, and each logical frame includes 4 continuous logic subframes, each logic subframe
Include 1 beacon symbols and Sn OFDM symbol.
2. the method for data is transmitted in DMB as claimed in claim 1, it is characterised in that digital many matchmakers
Body broadcasts as digital audio broadcasting or DVB.
3. in DMB as claimed in claim 1 transmit data method, wherein each OFDM symbol include than
Special position c0~c35；
Wherein：
c0~c1Represent the position of current physical layer signal frame；
c2~c3Represent present sub-frame position；
c4~c5Represent the subframe method of salary distribution；
c6~c7Represent that transmitting data frame distributes the modulation system of information；
c8~c9Represent the modulation system of business datum；
c10~c11Represent that the hierarchical modulation of business datum is indicated；
c12Represent the coding of business datum using the instruction uniformly protected；
c13~c14Represent the LDPC encoder bit rates of business datum；
c15~c16Represent the LDPC encoder bit rates of business datum；
c17~c26Represent to retain Rfa；
c27~c29Represent CRC check position；
c30~c35Represent to retain Rfu.
4. the method for data is transmitted in the DMB as described in claim 1 or 3, it is described that logical frame is mapped as thing
Reason signal frame includes：
Put in order according to 4 continuous logic subframes in the logical frame, 4 logic subframes in the logical frame are mapped
For 4 physical sub-frames in physical signalling frame, wherein Sn is 56.
5. the method for data is transmitted in the DMB as described in claim 1 or 3, it is described that logical frame is mapped as thing
Reason signal frame includes：
8 continuous logic subframes using in 4 continuous logic frames in every 2 logical frames is groups, by the logic subframe phase in the group
Mutually staggeredly, and by the interlaced logic subframe of the group 2 continuous physical signal frames are mapped as, wherein Sn is 111.
6. the method for data is transmitted in the DMB as described in claim 1 or 3, it is described that logical frame is mapped as thing
Reason signal frame includes：
Using 4 continuous logic frames as group, i-th of logic subframe in each logical frame in the group is sequentially mapped to i-th of thing
Signal frame is managed, wherein i is 1,2,3 or 4.
7. the method for data is transmitted in DMB as claimed in claim 1, it is characterised in that digital many matchmakers
Body broadcasts as digital audio broadcasting；
The DMB receiving terminal optionally receives business data packet from the DMB transmitting terminal
Include：
During DMB receiving terminal distributes the work that information determines reception business datum according to the transmitting data frame
During the inoperative for not receiving business datum；
When during the work, DMB, which is received, corresponds to the business datum that transmitting data frame distributes information,
When not during the work, DMB does not receive business datum.
8. the system of data is transmitted in a kind of DMB, it is characterised in that the system includes DMB
Transmitting terminal and DMB receiving terminal, wherein：
DMB transmitting terminal, believes for generating transmitting data frame distribution information, and the transmitting data frame being distributed
Breath is sent to DMB receiving terminal；
DMB receiving terminal is optionally more from the numeral for distributing information according to the transmitting data frame
Media broadcast transmitting terminal receives business datum；
Wherein, when the DMB is digital audio broadcasting, the DMB transmitting terminal, for institute
State transmitting data frame distribution information and carry out channel coding, Bit Interleave and symbol mapping processing successively, and above-mentioned channel will be passed through
Transmitting data frame distribution information and the business datum multiple connection after coding, Bit Interleave and symbol mapping processing are physical signalling
Frame, and the physical signalling frame is sent to DMB receiving terminal；
Wherein, the transmitting data frame by after above-mentioned channel coding, Bit Interleave and symbol mapping processing distributes information
It is that physical signalling frame includes with the business datum multiple connection：
By it is described by above-mentioned channel coding, Bit Interleave and symbol mapping processing after transmitting data frame distribution information with it is described
Business datum constitutes logical frame, and the logical frame is mapped as into physical signalling frame, and is sent；
The wherein 4 physical signalling frames constitute a physics superframe, and each physical signalling frame includes 4 physical sub-frames, each
Physical sub-frame includes 1 beacon symbols and Sn OFDM symbol；
4 continuous logic frames constitute a logic superframe, and each logical frame includes 4 continuous logic subframes, each logic subframe
Include 1 beacon symbols and Sn OFDM symbol.
9. the system of data is transmitted in DMB as claimed in claim 8, it is characterised in that wherein each OFDM
Symbol includes bit c0~c35；
Wherein：
c0~c1Represent the position of current physical layer signal frame；
c2~c3Represent present sub-frame position；
c4~c5Represent the subframe method of salary distribution；
c6~c7Represent that transmitting data frame distributes the modulation system of information；
c8~c9Represent the modulation system of business datum；
c10~c11Represent that the hierarchical modulation of business datum is indicated；
c12Represent the coding of business datum using the instruction uniformly protected；
c13~c14Represent the LDPC encoder bit rates of business datum；
c15~c16Represent the LDPC encoder bit rates of business datum；
c17~c26Represent to retain Rfa；
c27~c29Represent CRC check position；
c30~c35Represent to retain Rfu.
10. the system of data is transmitted in DMB as claimed in claim 8 or 9, it is characterised in that wherein：
The DMB transmitting terminal, will for being put in order according to 4 continuous logic subframes in the logical frame
4 logic subframes in the logical frame are mapped as 4 physical sub-frames in physical signalling frame, and wherein Sn is 56.
11. the system of data is transmitted in DMB as claimed in claim 8 or 9, it is characterised in that wherein：
The DMB transmitting terminal, for 8 continuous logics in 4 continuous logic frames in every 2 logical frames
Subframe is group, and the logic subframe in the group is interlaced, and the interlaced logic subframe of the group is mapped as into 2 continuous things
Signal frame is managed, wherein Sn is 111.
12. the system of data is transmitted in DMB as claimed in claim 8 or 9, it is characterised in that wherein：
The DMB transmitting terminal, for using 4 continuous logic frames as group, by each logical frame in the group
I logic subframe is sequentially mapped to i-th of physical signalling frame, and wherein i is 1,2,3 or 4.
13. transmitting the system of data in DMB as claimed in claim 8, the DMB is number
Word audio broadcasting；
The DMB receiving terminal, determines to receive business datum for distributing information according to the transmitting data frame
During the inoperative for not receiving during work and business datum；And when during the work, DMB is received
The business datum of information is distributed corresponding to transmitting data frame, when not during the work, DMB is not received
Business datum.
14. a kind of DMB transmitting terminal, it is characterised in that including：Data frame distribution information process unit, physics letter
Number frame Multi-connection unit and rf transmitter unit, wherein：
Data frame distributes information process unit, for generating transmitting data frame distribution information, and the transmitting data frame is distributed
Information carries out channel coding, Bit Interleave and symbol mapping processing successively；
Physical signalling frame Multi-connection unit, for by by above-mentioned channel coding, Bit Interleave and symbol mapping processing after transmission
It is physical signalling frame that data frame, which distributes information with business datum multiple connection, and the physical signalling frame is sent into radio-frequency transmissions list
Member,
Wherein, when the DMB is digital audio broadcasting, the physical signalling frame Multi-connection unit, for by described in
Transmitting data frame distribution information and the business datum group after above-mentioned channel coding, Bit Interleave and symbol mapping processing
Physical signalling frame is mapped as into logical frame, and by the logical frame, and is sent, wherein,
4 physical signalling frames constitute a physics superframe, and each physical signalling frame includes 4 physical sub-frames, each physics
Subframe includes 1 beacon symbols and Sn OFDM symbol,
4 continuous logic frames constitute a logic superframe, and each logical frame includes 4 continuous logic subframes, each logic subframe
Include 1 beacon symbols and Sn OFDM symbol；
Rf transmitter unit, for the physical signalling frame to be sent.
15. DMB transmitting terminal as claimed in claim 14, it is characterised in that wherein each OFDM symbol includes
Bit c0~c35；
Wherein：
c0~c1Represent the position of current physical layer signal frame；
c2~c3Represent present sub-frame position；
c4~c5Represent the subframe method of salary distribution；
c6~c7Represent that transmitting data frame distributes the modulation system of information；
c8~c9Represent the modulation system of business datum；
c10~c11Represent that the hierarchical modulation of business datum is indicated；
c12Represent the coding of business datum using the instruction uniformly protected；
c13~c14Represent the LDPC encoder bit rates of business datum；
c15~c16Represent the LDPC encoder bit rates of business datum；
c17~c26Represent to retain Rfa；
c27~c29Represent CRC check position；
c30~c35Represent to retain Rfu.
16. the DMB transmitting terminal as described in claims 14 or 15, it is characterised in that the physical signalling frame is answered
Order member, for being put in order according to 4 continuous logic subframes in the logical frame, by 4 logics in the logical frame
Subframe is mapped as 4 physical sub-frames in physical signalling frame, and wherein Sn is 56.
17. the DMB transmitting terminal as described in claims 14 or 15, it is characterised in that the physical signalling frame is answered
Order member, for 8 continuous logic subframes using in 4 continuous logic frames in every 2 logical frames as group, by the logic in the group
Subframe is interlaced, and the interlaced logic subframe of the group is mapped as into 2 continuous physical signal frames, and wherein Sn is 111.
18. the DMB transmitting terminal as described in claims 14 or 15, it is characterised in that the physical signalling frame is answered
Order member, for using 4 continuous logic frames as group, i-th of logic subframe in each logical frame in the group to be sequentially mapped to
I-th of physical signalling frame, wherein i is 1,2,3 or 4.
19. a kind of DMB receiving terminal, it is characterised in that distribute information resolution unit and industry including transmitting data frame
Business data receipt unit, wherein：
Transmitting data frame distributes information resolution unit, for digital many matchmakers as described in any one from such as claim 14-18
Body broadcast transmission end receives the transmitting data frame distribution information being generated by it, and parses the transmitting data frame distribution information with true
Surely during the inoperative for not receiving during receiving the work of business datum and business datum；
Business datum receiving unit, for when during the work, DMB to be received corresponding to transmission data
Frame distributes the business datum of information, and when not during the work, DMB does not receive business datum.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110240269.3A CN102957942B (en) | 2011-08-17 | 2011-08-17 | The methods, devices and systems of data are transmitted in DMB |
| PCT/CN2012/080155 WO2013023587A1 (en) | 2011-08-17 | 2012-08-15 | Transmission data method, device and system for digital multimedia broadcasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110240269.3A CN102957942B (en) | 2011-08-17 | 2011-08-17 | The methods, devices and systems of data are transmitted in DMB |
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| CN102957942B true CN102957942B (en) | 2017-07-25 |
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| CN105827360B (en) * | 2015-01-07 | 2019-09-06 | 中国科学院上海高等研究院 | A kind of transmission method of wireless digital multimedia broadcast system |
| CN109474836B (en) * | 2017-09-07 | 2020-10-09 | 北京泰美世纪科技有限公司 | Method and device for sending and receiving digital multimedia signals |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1960227A (en) * | 2006-08-09 | 2007-05-09 | 北京泰美世纪科技有限公司 | Method for sending control information to indicate operation of receiver |
| CN101663889A (en) * | 2007-03-19 | 2010-03-03 | 三星电子株式会社 | Transmitting and receiving method and apparatus for digital television broadcasting data |
| CN101729169A (en) * | 2008-10-14 | 2010-06-09 | 国家广播电影电视总局广播科学研究院 | Method and device for transmitting and receiving multimedia data |
| CN101800723A (en) * | 2009-02-11 | 2010-08-11 | 北京泰美世纪科技有限公司 | Mobile multimedia broadcast transmission system |
| WO2010116579A1 (en) * | 2009-03-30 | 2010-10-14 | 三菱電機株式会社 | Digital broadcast receiver |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101358850B1 (en) * | 2007-03-23 | 2014-02-05 | 삼성전자주식회사 | Broadcasting receiver and method for executing application in broadcasting receiver |
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2011
- 2011-08-17 CN CN201110240269.3A patent/CN102957942B/en active Active
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1960227A (en) * | 2006-08-09 | 2007-05-09 | 北京泰美世纪科技有限公司 | Method for sending control information to indicate operation of receiver |
| CN101663889A (en) * | 2007-03-19 | 2010-03-03 | 三星电子株式会社 | Transmitting and receiving method and apparatus for digital television broadcasting data |
| CN101729169A (en) * | 2008-10-14 | 2010-06-09 | 国家广播电影电视总局广播科学研究院 | Method and device for transmitting and receiving multimedia data |
| CN101800723A (en) * | 2009-02-11 | 2010-08-11 | 北京泰美世纪科技有限公司 | Mobile multimedia broadcast transmission system |
| WO2010116579A1 (en) * | 2009-03-30 | 2010-10-14 | 三菱電機株式会社 | Digital broadcast receiver |
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| CN102957942A (en) | 2013-03-06 |
| WO2013023587A1 (en) | 2013-02-21 |
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