CN105827360B - A kind of transmission method of wireless digital multimedia broadcast system - Google Patents
A kind of transmission method of wireless digital multimedia broadcast system Download PDFInfo
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Abstract
The present invention provides a kind of frame structure of wireless digital multimedia broadcast system, it include: several superframes, each superframe includes several period times, the period times are made of N number of radio slot for being used for transmission radio broadcasting signal and the M undefined periods for being used for transmission other wireless signals, and the configuration structure of each radio slot is identical in each superframe；Each radio slot includes X broadcast subsegment, and a broadcast subsegment includes the Y physical frames with different physical frame header types；Wherein, N is the positive integer more than or equal to 1, and M is 1 or 0, and X is the positive integer more than or equal to 1, and Y is the positive integer more than or equal to 1.The frame structure of wireless data multi-media broadcasting system of the present invention in performance having and flexibly can support different radio broadcast system the different demands of the performances such as capacity, time delay the advantages of on the basis of taking into account the performance requirement of signaling overheads, preliminary sweep and zapping.
Description
Technical field
The invention belongs to wireless communication technology fields, are related to a kind of frame structure, more particularly to a kind of more matchmakers of wireless data
The transmission method of body broadcast system.
Background technique
With the fast development of digital technology and information technology, when the whole world comes into digitlization, informationization, networking
Generation, digital multimedia broadcasting are also grown rapidly.At this stage, mainly there are following a few class digital television broadcasting marks in the world
It is quasi-: Advanced Television Systems Committee (ATSC) standard, the synthesis of Japan of European digital television broadcasting (DVB) standard, the U.S.
Service digital broadcasts (ISDB) standard.The DTV of China exactly starts to send out under the atmosphere that international digital grows to even greater heights
Exhibition, is proposed digital TV ground multimedia broadcasting (DTMB) standard, China Mobile Multimedia Broadcasting (CMMB) standard etc..
The baseband signal of one digital tv wireless broadcast system be by a series of physical frame groups at, usual each object
Reason frame is made of leading part, signaling moiety and data portion, and leading part is for the synchronous or/and signal based on header type
Identification.Signaling moiety is used to describe the modulating-coding transmission mode of data portion, it can also indicate that data to be decoded position or
Person receives information necessary to data, and data portion is for carrying data source or service flow to be transmitted.In Physical Frame Structure,
Generally meeting reserved part physical slot by time uses to extend for system in future.In existing wireless broadcast system, generally use
The unfixed frame length of length supports semi-static change frame length.But for CMMB system, transmission frame length is fixed as 1 second, is divided
For 40 time slots, each broadcasting service occupies one or several time slots.
It is marched along with traditional tv media to networking TV new media channel, broadcast service mode is to content format
The direction of the features such as diversity, type service diversity, access way diversity converts, and radio broadcasting signal transmission mode is from list
Enter it is single go out (SISO) mode also to enter more it is single go out or MIMO mode (enter more it is single go out and multiple-input, multiple-output, be referred to as MIXO) drill
Into to be enhanced in efficiency of transmission and transmission reliability.Meanwhile the mutual infiltration between telecommunications network, radio network and internet
It is thoroughly and compatible so that the growth momentum of the integration of three networks is more obvious.These for wireless digital broadcasting bring new opportunity to develop and
Challenge, also proposes new demand to the frame structure of digital multi-media radio broadcast system.
Under the demand of broadcast service mode diversification and information content syncretization, digital multimedia wireless broadcast system
Frame structure need support multiple types radio broadcasting signal, even not wireless broadcast singal (such as letter of long term evolution LTE system
Number) coexist.DVB next generation's hand held television standard (DVB-NGH) provides the frame structure for supporting a variety of wireless signals to coexist, but
Be the frame structure of different wireless signal period assignment mode it is more single, cannot combine very well reduces signaling traffic load and suitable
Answer different radio broadcast system to the different demands of capacity, time delay.In addition, being broadcasted for wireless digital multimedia, preliminary sweep
Performance, especially zapping performance will take into account consideration when the conceptual design of whole system includes frame structure design.
Therefore, how a kind of transmission method of wireless digital multimedia broadcast system is provided, with solve in the prior art without
The period assignment mode of the frame structure of line signal is more single, and it is different with adaptation cannot to combine reduction signaling traffic load well
Wireless broadcast system is to the different demands of capacity, time delay, and cannot take into account and consider that preliminary sweep performance and zapping performance etc. are various
Defect has become practitioner in the art's technical problem urgently to be resolved in fact.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of wireless data multimedia broadcastings
The transmission method of system, the period assignment mode for solving the frame structure of wireless signal in the prior art is more single, cannot
Combining well reduces signaling traffic load and adapts to different radio broadcast system to the different demands of capacity, time delay, and cannot
It takes into account and considers the problems of preliminary sweep performance and zapping performance.
In order to achieve the above objects and other related objects, the present invention provides a kind of biography of wireless digital multimedia broadcast system
Transmission method characterized by comprising several superframes, each superframe include several period times, the period times by
N number of radio slot for being used for transmission radio broadcasting signal and the M undefined periods for being used for transmission other wireless signals form, and
The configuration structure of each radio slot is identical in each superframe；One radio slot includes X broadcast
Section, a broadcast subsegment includes the Y physical frames with different physical frame header types；Wherein, N is more than or equal to 1
Positive integer, M are 1 or 0, and X is the positive integer more than or equal to 1, and Y is the positive integer more than or equal to 1.
Optionally, the undefined period be can arrangement.
Optionally, the physical frame header type includes the leading letter for carrying fixed broadcast single-input single-output signal type
Number, the fixed broadcast multi input of carrying it is more/targeting signal of single output signal type, carry mobile broadcast single-input single-output signal
The targeting signal of type, the targeting signal for carrying mobile broadcast multi input mono-/multi- output signal type.
Optionally, the position of the quantity of physical frame, physical frame header type and physical frame is logical in a broadcast subsegment
It crosses a physical layer signaling and calculates acquisition.
Optionally, the physical layer signaling includes the institute using the index of physical frame header type as the loop body of cyclic variable
The cycle-index for stating loop body is equal to the quantity of physical frame header type in each radio slot.
Optionally, the physical layer signaling uses signaling domain representation, and the signaling domain appeared in the loop body includes table
Show that the signaling domain of physical frame header type, the physical frame with the physical frame header type appear in broadcast in radio slot
The signaling domain of position in section, physical frame frame length with the physical frame header type signaling domain.
Optionally, when the physical frame header type of the physical frame in the loop body with transmission radio broadcasting signal it is current
When the physical frame header type of physical frame is identical, the physical frame frame length in the loop body with respective physical frame preamble type is logical
The quantity of orthogonal multiplex symbol after crossing removal leading symbol is calculated；Before the physical frame of physical frame in the loop body
When the physical frame header type of the present physical frame of conductivity type and transmission radio broadcasting signal is not identical, have in the loop body
The physical frame frame length of respective physical frame preamble type is indicated by the basic sampling period.
Optionally, the signaling domain further includes the signaling domain for indicating the duration of undefined period, indicates described in one
In superframe the signaling domain of undefined period number and indicate a superframe in radio slot quantity signaling domain.
Optionally, in each broadcast subsegment, the physical frame with different physical frame header types is according to it in institute
The sequencing occurred in loop body is stated to be arranged.
Optionally, the transmission time of each superframe
Wherein, NBS,SFIndicate the quantity of radio slot in a superframe, NF-TypeIndicate the physical frame that a radio slot is included
The quantity of header type, maximum value 4, NF,F-Type(j)Indicate that there is jth kind physical frame header type in a radio slot
Physical frame quantity, wherein 0≤j≤3, TF,F-Type(j)Indicate the physical frame frame length with jth kind physical frame header type,Indicate the duration of radio slot in a superframe, NUDS,SFIt indicates in a superframe not
Define the quantity of period, TUDS,SFIndicate the duration of undefined period in a superframe.
As described above, the frame structure of wireless data multi-media broadcasting system of the present invention, has the advantages that
1, the present invention can functionally support a variety of wireless broadcast systems to be total to transmission, can also support wide with existing wireless
The communication system of system, the following extended wireless broadcast system and not wireless broadcast altogether transmission is broadcast, radio broadcasting is conducive to
The smooth transition of system and further evolution, can lay the foundation on physical layer frame structure for the integration of three networks.
2, the present invention, can be on the basis of taking into account the performance requirement of signaling overheads, preliminary sweep and zapping, flexibly in performance
Support different radio broadcast system the different demands of the performances such as capacity, time delay the advantages of.
Detailed description of the invention
Fig. 1 is shown as the frame structure theory structure schematic diagram of wireless data multi-media broadcasting system of the invention.
Fig. 2 is shown as the structural representation of the frame structure embodiment one of wireless data multi-media broadcasting system of the invention
Figure.
Fig. 3 is shown as the structural representation of the frame structure embodiment two of wireless data multi-media broadcasting system of the invention
Figure.
Fig. 4 is shown as the structural representation of the frame structure embodiment three of wireless data multi-media broadcasting system of the invention
Figure.
Component label instructions
1,1 ', 1 " and 1 " ' wireless data multi-media broadcasting system
Frame structure
11 superframes
12 period times
111 radio slots
112 undefined periods
1111 broadcast subsegments
11111 physical frames
The fixed broadcast SISO physical frame of 11111a
The fixed broadcast MISO physical frame of 11111b
11111c mobile broadcast SISO physical frame
11111d mobile broadcast MIXO physical frame
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
Please refer to attached drawing.It should be noted that only the invention is illustrated in a schematic way for diagram provided in the present embodiment
Basic conception, only shown in schema then with related component in the present invention rather than component count, shape when according to actual implementation
Shape and size are drawn, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its component cloth
Office's kenel may also be increasingly complex.
Below with reference to embodiment and attached drawing, the present invention is described in detail.
The frame structure 1 of wireless data multi-media broadcasting system of the present invention, referring to Fig. 1, it is more to be shown as wireless data
The theory structure schematic diagram of the frame structure of media broadcasting system.As shown in Figure 1, the frame of the wireless data multi-media broadcasting system
Structure 1 includes several superframes 11, each described superframe 11 is made of several period times 12 again, when each period
Section 12 by N number of radio slot 111 for being used for transmission radio broadcasting signal and M be used for transmission other wireless signals it is undefined when
Section 112 shapes composition, and the configuration structure of each radio slot 111 is identical in each superframe 11；It is one described wide
Sowing time section 111 includes X broadcast subsegment 1111, and a broadcast subsegment 1111, which includes Y, has different physics frame preamble classes
The physical frame 11111 of type；Wherein, N is the positive integer more than or equal to 1, and M is 1 or 0, and X is the positive integer more than or equal to 1, and Y is big
In the positive integer for being equal to 1.In the frame structure of wireless data multi-media broadcasting system of the present invention, the undefined period
112 is can arrangements.Each radio slot may include 1 to 8 broadcast subsegment 1111, a broadcast subsegment 1111
It may include 1 to 4 physical frame 11111 with different physical frame header types, at most propped up in a broadcast subsegment
Hold 4 kinds of different physical frames.In the present invention, the setting of the broadcast subsegment 1111 is mainly according to frame structure configuration flexibility demand
It is determined with two aspect factor of signaling overheads.On the one hand, broadcast subsegment quantity is more, and supported frame structure configuration is more flexible,
On the other hand, broadcast subsegment quantity is more, and the physical layer signaling bit needed is more.Concrete configuration is several in 1 radio slot
Broadcast subsegment is mainly set according to broadcast operator according to business transmission demand.Such as before the development of broadcasting network of new generation
Phase, simple configuration mode can meet demands (such as 1 broadcast subsegment)；But as network Development is more mature, business kind
Type is abundanter, and the demand in transmission rate and time delay is more various, higher to the flexible configuration demand of frame structure (to be reflected in this
It is that broadcast subsegment quantity demand increases in scheme).
Wherein, the configuration structure for each radio slot 111 for including in each superframe 11 is all the same, and the superframe
The radio slot duration, radio slot quantity, undefined window duration and undefined period number in 11 is in superframe
It inside remains unchanged, can only change in superframe boundaries, and radio slot quantity, undefined window duration in the superframe 11
It with undefined period number is configured by physical layer signaling.The physical layer signaling can get each broadcast subsegment
The position of the quantity of physical frame 11111, the type of physical frame and physical frame in 1111.In the present invention, each radio slot
The determination of physics number of frames, physical frame header type and physics frame position is according to following rule in 111:
One radio slot could support up 4 kinds of physical frames with different physical frame header types, this is to comprehensively consider reality
The type of business and signaling overheads and determination of transmission are needed support in the system of border.
A kind of physical frame with physical frame header type determines that its several broadcast subsegment in a radio slot goes out
Existing and which broadcast subsegment occurs, and is to comprehensively consider preliminary sweep performance, zapping performance, flexibility configuration needs and signaling
Expense and determination.
It, cannot be the present invention claims the physical frame with physics frame preamble type of the same race in terms of preliminary sweep and zapping
Repeat in one broadcast subsegment, is desirable to equably occur the physical frame with same physical frame header type as far as possible
In radio slot, in this way, receiver accesses (such as: scanning or zapping) from any time point, target physical frame preamble class is found
The average required time of the physical frame of type is shorter, is conducive to accelerate preliminary sweep and zapping in this way.
In terms of flexible configuration demand and signaling overheads, following example is illustrated how on the basis of meeting business demand, this
Invention can be further reduced signaling overheads using multiple broadcast subsegments.
Example: totally three kinds of physical frame header types: mobile broadcast SISO, fixed broadcast MIMO, fixed broadcast SISO, at 1 second
It is inside respectively necessary for passing the time of 100ms, 600ms, 300ms, it is assumed that physical layer signaling expense is identical in each physical frame, here
To occupy in terms of the 5ms time.
If 1 radio slot shares 4 radio slots, each radio slot only with 1 broadcast subsegment in 1 second
Including 1 broadcast subsegment, which successively includes mobile broadcast SISO physical frame, fixed broadcast MIMO physical frame and fixation
SISO physical frame is broadcasted, wherein the frame length of mobile broadcast SISO physical frame is 25ms, the frame length of fixed broadcast MIMO physical frame is
150ms, the fixed frame length for broadcasting SISO physical frame are 75ms.In such configuration mode, the frame of mobile broadcast SISO physical frame
Long too short, the too big 5ms/25ms=1/5 of the specific gravity that physical layer signaling accounts for.
In frame structure of the present invention, it can support that configuration mode introduced below, 1 radio slot include 4
Subsegment is broadcasted, broadcast subsegment 0 successively includes mobile broadcast SISO physical frame, fixed broadcast MIMO physical frame and fixed broadcast SISO
Physical frame, broadcast subsegment 1 successively include fixed broadcast MIMO physical frame and fixed broadcast SISO physical frame, and broadcast subsegment 2 is successively
It is only included including mobile broadcast SISO physical frame, fixed broadcast MIMO physical frame and fixed broadcast SISO physical frame, broadcast subsegment 3
Fixed broadcast MIMO physical frame.Wherein the frame length of mobile broadcast SISO physical frame is the frame of 50ms, fixed broadcast MIMO physical frame
A length of 150ms, the fixed frame length for broadcasting SISO physical frame are 100ms.It is flexible just because of multicast subsegment provided by the invention
Frame structure so that mobile broadcast SISO physical frame and fixed broadcast SISO physical frame have more than above-mentioned configuration mode
Low physical layer signaling expense.
In the present invention, the different broadcast subsegments 1111 in each radio slot 111 may include different/identical objects
Manage number of frames or/and with difference/same physical frame preamble type physical frame 11111.Difference in one radio slot 111
The length for broadcasting subsegment 1111 can be unequal/equal.
In the present invention, the physical layer signaling includes the institute using the index of physical frame type as the loop body of cyclic variable
The cycle-index for stating loop body is equal to 4, and the signaling domain of the loop body includes: physical frame header type, has this kind of physics
The physical frame of frame preamble type appears in the position in the broadcast subsegment in radio slot and has this kind of physical frame header type
Physical frame frame length.In each broadcast subsegment 1111, the physical frame 11111 with different physical frame header types is pressed
It is arranged according to its sequencing occurred in the loop body.
Shown physical layer signaling is indicated using following signaling domain:
It is indicated according to the signaling domain, shown physical layer signaling domain meaning is as follows:
UDS_LENGTH:22 bit indicates the signaling domain of the duration of undefined period, is single with the basic sampling period
Position.
NUM_UDS:8 bit indicates the signaling domain of the quantity of undefined period in a superframe.
NUM_BROADCAST_SEGMENT:8 bit indicates the signaling domain of the quantity of radio slot in a superframe.
The physical layer signaling domain further includes the signaling domain appeared in FOR i=0,1,2,3 loop body.Wherein, it recycles
Variable i indicates the index of the physical frame header type in a radio slot 111.
The signaling domain appeared in the loop body includes:
PREAMBLE_TYPE::3 bit indicates the signaling domain of physics frame preamble type.Such as table 1: physical frame header type,
Table 1 gives physical frame header type and provides its corresponding signaling domain value for different physical frame header types.The object
Managing frame preamble type includes the targeting signal of fixed broadcast single-input single-output signal (SISO) type of carrying, the fixed broadcast of carrying
Multi input is more/targeting signal of single output signal (MIXO) type, carrying mobile broadcast single-input single-output signal (SISO) class
The targeting signal of type, the targeting signal for carrying mobile broadcast multi input mono-/multi- output signal (MIXO) type etc..That is institute
Stating physical frame 11111 includes: fixed broadcast SISO physical frame 11111a, fixed broadcast MIXO physical frame 11111b, mobile broadcast
SISO physical frame 11111c and mobile broadcast MIXO physical frame 11111d etc..
Table 1: physical frame header type
| Signaling domain value | Description |
| 000 | The preamble signal type of fixed broadcast SISO physical frame |
| 001 | The preamble signal type of fixed broadcast MIXO physical frame |
| 010 | The preamble signal type of mobile broadcast SISO physical frame |
| 011 | The preamble signal type of mobile broadcast MIXO physical frame |
| 100-111 | It is reserved |
BROADCAST_SUBSEGMENT_POS:8 bit indicates in the loop body indicated by PREAMBLE_TYPE
The physical frame of header type appears in the signaling domain of the position in the broadcast subsegment in radio slot.Jth (0≤j≤7) a bit
For " 1 ", indicate that the physical frame of header type indicated by PREAMBLE_TYPE appears in the radio slot 111 j-th
It broadcasts in subsegment 1111.Physical frame 11111 in the broadcast subsegment 1111 refers to according to PREAMBLE_TYPE in the loop body
The sequencing that the physical frame header type shown occurs is arranged.When this signaling domain value is " 00000000 ", indicate wide
Sowing time section does not include the physical frame of the header type of corresponding PREAMBLE_TYPE instruction.
NUM_SYMBOLS:12 bit indicates the physics frame preamble class when PREAMBLE_TYPE instruction in the loop body
When type is identical as the transmission physical frame header type of present physical frame of radio broadcasting signal, there is homologue in the loop body
Manage the signaling domain of the quantity of the orthogonal multiplex symbol in the physical frame of frame preamble type after removal leading symbol.In the loop body
The frame length of physical frame with respective physical frame preamble type is calculated by the signaling domain.The signaling domain is suitable in superframe
All physical frames with same physical frame preamble type, and value remains unchanged in superframe.
FRAME_LEN:24 bit indicates the physical frame header type when PREAMBLE_TYPE instruction in the loop body
When with the physical frame header type difference of the present physical frame of transmission radio broadcasting signal, PREAMBLE_ in the loop body
The signaling domain of the physical frame frame length with respective physical frame preamble type of TYPE instruction, which is with the basic sampling period
Unit.
The physical frame number of types for being included in one radio slot is BROADCAST_ in the loop body
SUBSEGMENT_POS signaling domain value is not the sum of the number of " 00000000 ".A kind of physics in a radio slot 111
The quantity of the physical frame of frame preamble type is BROADCAST_ corresponding to corresponding PREAMBLE_TYPE in the loop body
1 quantity in 8 bits in SUBSEGMENT_POS signaling domain.The quantity of broadcast subsegment 1111 is in one radio slot 111
All BROADCAST_SUBSEGMENT_POS signalings domain is obtained by summing after bit or operation in the loop body, jth
11111 quantity of physical frame that (0≤j≤7) a broadcast subsegment is included is BROADCAST_SUBSEGMENT_ in the loop body
The quantity that POS signaling domain is 1 in a bit place value of jth (0≤j≤7).
In the present invention, the transmission time of each superframe 11 is TSF, calculation formula are as follows:
Wherein, NBS,SFIndicate the quantity of radio slot in a superframe.NF-TypeIndicate that a radio slot is included
Physical frame header type quantity, maximum value 4, NF,F-Type(j)Indicate that there is jth kind physical frame in a radio slot
The quantity of the physical frame of header type, wherein 0≤j≤3.TF,F-Type(j)Indicate the physics with jth kind physical frame header type
The frame length of frame,Indicate the duration of radio slot in a superframe.NUDS,SFIndicate one
The quantity of undefined period in a superframe.TUDS,SFIndicate the duration of undefined period in a superframe.
Embodiment one
The present embodiment provides a kind of frame structures 1 ' of wireless data multi-media broadcasting system, referring to Fig. 2, being shown as wireless
The structural schematic diagram of the embodiment one of the frame structure of data multimedia broadcast system.As shown in Fig. 2, the more matchmakers of wireless data
The frame structure 1 ' of body broadcast system includes several superframes 11, each described superframe 11 includes several period times 12, each
The period times 12 are made of N number of radio slot 111 for being used for transmission radio broadcasting signal, and in each superframe 11
The configuration structure of each radio slot 111 is identical；Each radio slot 111 includes 1 broadcast subsegment 1111, each
The broadcast subsegment 1111 includes 2 physical frames 11111 with different physical frame header types, i.e., fixed broadcast MIXO physics
Frame 11111b and mobile broadcast SISO physical frame 11111c, the physical frame of both types is in superframe 11 with radio slot
111 repeat for the period, and the frame length of both physical frames with different physical frame header types is different, but same type of object
It is identical for managing frame length of the frame in superframe 11；Wherein, N be more than or equal to positive integer, in other words, described in the present embodiment
Including 1 broadcast subsegment 1111 in each radio slot 111 in the frame structure of wireless data multi-media broadcasting system, at this
Broadcast includes 2 physical frames with different physical frame header types in subsegment altogether.
In the present embodiment, in FOR i=0,1,2,3 loop body, as i=0, PREAMBLE_TYPE value is set
For " 010 ", i.e. expression physics frame preamble type is mobile broadcast SISO, corresponds to signaling domain BROADCAST_SUBSEGMENT_
POS value is " 10000000 ", i.e. expression mobile broadcast SISO physical frame 11111c is appeared in the 1st in the radio slot 111
In a broadcast subsegment 1111；As i=1, PREAMBLE_TYPE value is set as " 001 ", i.e. expression physics frame preamble type is
Fixed broadcast MIXO, corresponding to signaling domain BROADCAST_SUBSEGMENT_POS value is also " 10000000 ", that is, indicates solid
Surely broadcast MIXO physical frame 11111b is appeared in the radio slot 111 in the 1st broadcast subsegment 1111.As i=2 or 3,
PREAMBLE_TYPE value is " 111 ", and the corresponding equal value of signaling domain BROADCAST_SUBSEGMENT_POS is
“00000000”。
As can be seen that BROADCAST_SUBSEGMENT_POS is full 0 as cyclic variable i=2 and 3, that is, indicate one
Only have only 2 kinds of physical frame types in 2 kinds of physical frame types namely a superframe in radio slot.Due to BROADCAST_
Each bit of SUBSEGMENT_POS represents the object respectively broadcasted in radio slot and whether have respective physical frame type in subsegment
Frame is managed to occur, and in the present embodiment, to the physical frame of two kinds of physical frame header types, signaling domain BROADCAST_
It is 1 that SUBSEGMENT_POS, which only has the 0th bit value, therefore only one broadcast subsegment in a radio slot 111
1111。
Embodiment two
The present embodiment provides a kind of frame structures 1 " of wireless data multi-media broadcasting system, referring to Fig. 3, being shown as wireless
The structural schematic diagram of the embodiment two of the frame structure of data multimedia broadcast system.As shown in figure 3, the more matchmakers of wireless data
The frame structure 1 " of body broadcast system includes several superframes 11, each described superframe 11 includes several period times 12, each
The radio slot 111 and 1 that the period times 12 are used for transmission radio broadcasting signal by 1 is used for transmission CMMB, and (China moves
Dynamic multimedia broadcasting) undefined period 112 of signal forms, and each radio slot 111 in each superframe 11
Configuration structure it is identical；Each radio slot 111 includes 3 broadcast subsegments 1111, and a broadcast subsegment 1111 is wrapped
Include the Y physical frames 11111 with different physical frame header types；Wherein, Y is the positive integer for being less than or equal to 4 more than or equal to 1,
In the present embodiment, Y=3, in other words, in the frame structure of wireless data multi-media broadcasting system of the present invention, each
It include 1 to 4 physical frame 11111 with different physical frame header types in the broadcast subsegment 1111, it is described wide at one
It broadcasts and could support up 4 kinds of different physical frames in subsegment.
In in this implementation, a radio slot 111 and a CMMB period 112 constitute the duration that length is 1 second.
The duration of radio slot 111 and the duration of CMMB period 112 remain unchanged in superframe.Meanwhile radio slot 111
And its frame structure configuration on subordinate's layer remains unchanged in superframe 11, can only change in 11 boundary of superframe.
It in the present embodiment, include 3 broadcast subsegments 1111 in a radio slot 111.0th broadcast subsegment 1111 packet
The physical frame 11111 included is followed successively by mobile broadcast SISO physical frame 11111c, fixed broadcast MIXO physical frame 11111b and fixes
SISO physical frame 11111a is broadcasted, the physical frame 1111 that the 1st broadcast subsegment 1111 includes is followed successively by fixed broadcast MIXO physics
Frame 11111b and fixed broadcast SISO physical frame 11111a, the physical frame 11111 that the 2nd broadcast subsegment 1111 includes are fixed wide
Broadcast MIXO physical frame 11111b.Wherein, the physical frame frame length of three kinds of different types of physical frames is different, but same physical frame exists
Frame length in superframe 11 is identical.Three kinds of physical frames in radio slot 111 repetition frequency degree by close to dilute, be followed successively by fixed broadcast
MIXO physical frame 11111b occurs in broadcast subsegment 0, broadcast subsegment 1, broadcast subsegment 2, fixed broadcast SISO physical frame
11111a is appeared in broadcast subsegment 0 and broadcast subsegment 1, and mobile broadcast SISO physical frame 11111c only occurs in Broadcast field 0
In.The configuration of frame structure 1 " of the wireless data multi-media broadcasting system of offer described in the present embodiment considers different type broadcast and exists
On the one hand the different demands of transmission capacity and time delay etc. are in other words different type in a radio slot
The different frame number of the broadcast allocation of physical frame, another aspect same type physical frame compartment of terrain are distributed in a radio slot,
Be conducive to accelerate the raising of preliminary sweep and zapping performance.
In the present embodiment, in FOR i=0,1,2,3 loop body, as i=0, PREAMBLE_TYPE value is set
For " 010 ", i.e. expression physics frame preamble type is mobile broadcast SISO, corresponds to signaling domain BROADCAST_SUBSEGMENT_
POS value is " 10000000 ", i.e. expression mobile broadcast SISO physical frame 11111c is appeared in the 0th in the radio slot 111
In a broadcast subsegment 1111；As i=1, PREAMBLE_TYPE value is set as " 001 ", i.e. expression physics frame preamble type is
Fixed broadcast MIXO, corresponding to signaling domain BROADCAST_SUBSEGMENT_POS value is " 11100000 ", that is, indicates to fix
Broadcast MIXO physical frame 11111b is appeared in the radio slot 111 in the 0th broadcast subsegment 1111, the 1st broadcast subsegment
In 1111, in the 2nd broadcast subsegment 1111；As i=2, PREAMBLE_TYPE value is set as " 000 ", that is, indicates physical frame
Header type is fixed broadcast SISO, and corresponding to signaling domain BROADCAST_SUBSEGMENT_POS value is " 11000000 ",
Indicate that fixed broadcast SISO physical frame 11111a is appeared in the 0th broadcast subsegment and in the 1st broadcast subsegment；Work as i=3
When, PREAMBLE_TYPE value is set as " 111 ", and corresponding to signaling domain BROADCAST_SUBSEGMENT_POS value is
“00000000”。
It can thus be seen that BROADCAST_SUBSEGMENT_POS value in signaling domain is that full 0 only has one in the cycle
It is secondary, therefore include three kinds of physical frame types in a radio slot 111.The 8 of signaling domain BROADCAST_SUBSEGMENT_POS
A bit only has preceding 3 bits to exist for 1 situation in 4 values in loop body, and therefore, a radio slot includes
3 broadcast subsegments.Due to the 0th bit value of signaling domain BROADCAST_SUBSEGMENT_POS be 1 corresponding physical frame according to
It is secondary are as follows: mobile broadcast SISO physical frame has fixed broadcast MIXO physical frame, fixed broadcast SISO physical frame, therefore the 0th broadcast
The physical frame that subsegment includes is successively are as follows: mobile broadcast SISO physical frame, fixed broadcast MIXO physical frame and fixed broadcast SISO object
Manage frame.Due to the 1st bit value of signaling domain BROADCAST_SUBSEGMENT_POS be 1 corresponding physical frame successively are as follows: Gu
Surely MIXO physical frame, fixed broadcast SISO physical frame are broadcasted, therefore the physical frame that the 1st broadcast subsegment includes is successively are as follows: fixed
Broadcast MIXO physical frame and fixed broadcast SISO physical frame.Due to the 2nd bit of signaling domain BROADCAST_SUBSEGMENT_POS
Position value is 1 corresponding physical frame are as follows: fixed broadcast MIXO physical frame, therefore the physical frame that the 2nd broadcast subsegment includes is solid
Surely MIXO physical frame is broadcasted.
In short, in the loop body of physical frame type, PREAMBLE_TYPE and BROADCAST_SUBSEGMENT_POS this
Two fields express much information content with less signaling bit combined use, comprising: a radio slot included
Respectively broadcasting subsegment in a broadcast subsegment quantity that physical frame type, a radio slot are included, a radio slot is included
Physics number of frames, physical frame type and physics frame sequential.While supporting flexible frame structure configuration, signaling overheads has been taken into account
Performance.
Embodiment three
The present embodiment provides a kind of frame structures 1 " of wireless data multi-media broadcasting system ', referring to Fig. 4, being shown as nothing
Line number according to the embodiment three of the frame structure of multi-media broadcasting system structural schematic diagram.As shown in figure 4, the wireless data is more
The frame structure 1 " of media broadcasting system ' it include several superframes 11, each described superframe 11 includes several period times 12, often
The radio slot 111 and 1 that one period times 12 are used for transmission radio broadcasting signal by 2 is used for transmission LTE signal
The undefined period 112 forms, and the configuration structure of each radio slot 111 is identical in each superframe 11；Each
The radio slot 111 includes 2 broadcast subsegments 1111, and each broadcast subsegment 1111, which includes 2, has different physical frames
The physical frame 11111 of header type.The duration of the duration of radio slot 111 and undefined period 112 are in superframe
It remains unchanged.Meanwhile the frame structure configuration on radio slot 111 and its subordinate's layer remains unchanged in superframe 11, Zhi Neng
11 boundary of superframe changes.
It in the present embodiment, include 2 broadcast subsegments 1111 in a radio slot 111.0th broadcast subsegment 1111 packet
The physical frame 11111 included is followed successively by mobile broadcast SISO physical frame 11111c and fixes broadcast MIXO physical frame 11111b, and the 1st
The physical frame 1111 that broadcast subsegment 1111 includes is followed successively by mobile broadcast MIXO physical frame 11111d and fixed broadcast MIXO physics
Frame 11111b.Since the physical frame frame length of different types of physical frame is different, when all broadcast subsegments 0 and broadcast subsegment 1 continue
Between it is unequal.Wherein, fixed broadcast MIXO physical frame 11111b repetition frequency degree is high, is 2 times, mobile broadcast SISO physical frame
11111c and mobile broadcast SISO physical frame 11111c occur once respectively.
In the present embodiment, in FOR i=0,1,2,3 loop body, as i=0, PREAMBLE_TYPE value is set
For " 010 ", i.e. expression physics frame preamble type is mobile broadcast SISO, corresponds to signaling domain BROADCAST_SUBSEGMENT_
POS value is " 10000000 ", i.e. expression mobile broadcast SISO physical frame 11111c is appeared in the 0th in the radio slot 111
In a broadcast subsegment 1111；As i=1, PREAMBLE_TYPE value is set as " 011 ", i.e. expression physics frame preamble type is
Mobile broadcast MIXO, corresponding to signaling domain BROADCAST_SUBSEGMENT_POS value is " 01000000 ", that is, indicates movement
Broadcast MIXO physical frame 11111d is appeared in the radio slot 111 in the 1st broadcast subsegment 1111；As i=2, setting
PREAMBLE_TYPE value is " 001 ", i.e., expression physics frame preamble type is fixed broadcast MIXO, corresponds to signaling domain
BROADCAST_SUBSEGMENT_POS value is " 11000000 ", that is, indicates that fixed broadcast MIXO physical frame 11111b is appeared in
In 0th broadcast subsegment and in the 1st broadcast subsegment；As i=3, PREAMBLE_TYPE value is set as " 111 ", is corresponded to
Signaling domain BROADCAST_SUBSEGMENT_POS value is " 00000000 ".
It can thus be seen that BROADCAST_SUBSEGMENT_POS value in signaling domain is that full 0 only has one in the cycle
It is secondary, therefore include three kinds of different types of physical frames in a radio slot.Signaling domain BROADCAST_SUBSEGMENT_POS
8 bits only preceding 2 bits exist for 1 situation, therefore, a radio slot in 4 values in loop body
Include 2 broadcast subsegments.Since BROADCAST_SUBSEGMENT_POS the 0th bit value in signaling domain is 1 corresponding physics
Frame is successively are as follows: mobile broadcast SISO physical frame, fixed broadcast MIXO physical frame, therefore the physical frame that the 0th broadcast subsegment includes
Successively are as follows: mobile broadcast SISO physical frame and fixed broadcast MIXO physical frame.Due to signaling domain BROADCAST_SUBSEGMENT_
The 1st bit value of POS be 1 corresponding physical frame type successively are as follows: mobile broadcast MIXO physical frame and fixed broadcast MIXO object
Frame is managed, therefore the physical frame that the 1st broadcast subsegment includes is successively are as follows: mobile broadcast MIXO physical frame and fixed broadcast MIXO physics
Frame.
Equally, the present embodiment also embody frame structure configuration flexibility, while from the present embodiment it can also be seen that, by this hair
Frame structure configuration method provided by bright can effectively take into account preliminary sweep performance, zapping performance and physical layer signaling expense.
The frame structure of wireless data multi-media broadcasting system of the present invention can functionally support a variety of radio broadcastings
System is total to transmission, can also support to broadcast with existing wireless broadcast system, the following extended wireless broadcast system and not wireless
Communication system altogether transmission, be conducive to the smooth transition and further evolution of wireless broadcast system, in physical layer frame structure
On can lay the foundation for the integration of three networks.The present invention can need in performance in the performance for taking into account signaling overheads, preliminary sweep and zapping
On the basis of asking, flexibly support different radio broadcast system the different demands of the performances such as capacity, time delay the advantages of.
In conclusion the present invention effectively overcomes various shortcoming in the prior art and has high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (9)
1. a kind of transmission method of wireless digital multimedia broadcast system, which is characterized in that the transmission method supports a variety of nothings
Line broadcast system is total to transmission, with existing wireless broadcast system, the following extended wireless broadcast system and not wireless broadcast
Communication system altogether transmission；The frame structure that data construct in the following manner transmits in the channel altogether；The frame structure packet
Include: several superframes, each superframe include several period times, and the period times are used for transmission radio broadcasting by N number of
The radio slot and M of signal are used for transmission the composition of undefined period of other wireless signals, and each in each superframe
The configuration structure of a radio slot is identical；Each radio slot includes X broadcast subsegment, a broadcast subsegment
Physical frame including Y with different physical frame header types；Wherein, N is the positive integer more than or equal to 1, and M is 1 or 0, and X is big
In the positive integer for being equal to 1, Y is the positive integer more than or equal to 1；
Wherein, the header type of the physical frame include the targeting signal for carrying fixed broadcast single-input single-output signal type,
The fixed broadcast multi input of carrying is more/targeting signal of single output signal type, carry mobile broadcast single-input single-output class signal
The targeting signal of type, the targeting signal for carrying mobile broadcast multi input mono-/multi- output signal type.
2. the transmission method of wireless digital multimedia broadcast system according to claim 1, it is characterised in that: described uncertain
The adopted period is can arrangement.
3. the transmission method of wireless digital multimedia broadcast system according to claim 1, it is characterised in that: described in one
The position for broadcasting the quantity of physical frame, physical frame header type and physical frame in subsegment is calculated by physical layer signaling to be obtained.
4. the transmission method of wireless digital multimedia broadcast system according to claim 3, it is characterised in that: the physics
Layer signaling includes using the index of physical frame header type as the loop body of cyclic variable, and the cycle-index of the loop body is equal to every
The quantity of physical frame header type in one radio slot.
5. the transmission method of wireless digital multimedia broadcast system according to claim 4, it is characterised in that: the physics
Layer signaling uses signaling domain representation, and appearing in the signaling domain in the loop body includes the signaling for indicating physics frame preamble type
Domain, the physical frame with the physical frame header type appear in the signaling domain of the position in the broadcast subsegment in radio slot, tool
There is the signaling domain of the physical frame frame length of the physical frame header type.
6. the transmission method of wireless digital multimedia broadcast system according to claim 5, it is characterised in that: followed when described
When physical frame header type in ring body is identical as the transmission physical frame header type of present physical frame of radio broadcasting signal, institute
State transmission radio broadcasting signal present physical frame frame length by removal leading symbol after orthogonal multiplex symbol quantity come
It is calculated；When the present physical frame of the physical frame header type of physical frame in the loop body and transmission radio broadcasting signal
When physical frame header type is not identical, the physical frame frame length in the loop body with respective physical frame preamble type by adopting substantially
The instruction of sample period.
7. the transmission method of wireless digital multimedia broadcast system according to claim 6, it is characterised in that: the signaling
Domain further includes the signaling domain for indicating the duration of undefined period, the letter for indicating undefined period number in a superframe
It enables domain and indicates the signaling domain of radio slot quantity in a superframe.
8. the transmission method of wireless digital multimedia broadcast system according to claim 5, it is characterised in that: in each institute
It states in broadcast subsegment, the sequencing that the physical frame with different physical frame header types occurs in the loop body according to it
It is arranged.
9. the transmission method of wireless digital multimedia broadcast system according to claim 1, it is characterised in that: each described
The transmission time of superframeWherein, NBS,SFIt indicates
The quantity of radio slot, N in one superframeF-TypeIndicate the number for the physical frame header type that a radio slot is included
Amount, maximum value 4, NF,F-Type(j)Indicate the number of the physical frame in a radio slot with jth kind physical frame header type
Amount, 0≤j≤3, TF,F-Type(j)Indicate the physical frame frame length with jth kind physical frame header type,Indicate the duration of radio slot in a superframe, NUDS,SFIt indicates in a superframe not
Define the quantity of period, TUDS,SFIndicate the duration of undefined period in a superframe.
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| CN101166070A (en) * | 2006-10-17 | 2008-04-23 | 中国科学院上海微系统与信息技术研究所 | Frame structure for shared spectrum between broadcast TV signal and telecommunication signals |
| CN101919188A (en) * | 2007-12-19 | 2010-12-15 | 英特尔公司 | Transmission of system configuration information in mobile WIMAX systems |
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