CN104796241A - Multi-carrier frequency digital multimedia wireless broadcasting system signaling transmission method - Google Patents
Multi-carrier frequency digital multimedia wireless broadcasting system signaling transmission method Download PDFInfo
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Abstract
The invention provides a multi-carrier frequency digital multimedia wireless broadcasting system signaling transmission method. Firstly, multiple carrier frequencies are divided into a primary carrier frequency and secondary carrier frequencies; as for the primary carrier frequency, specific signaling of the primary carrier frequency is used for configuring a repetitive pattern, partial physical frames configured on the primary carrier frequency carry simplified signaling, and the rest physical frames carry normal signaling; as for the secondary carrier frequencies, in all physical frames bearing one data flow on all secondary carrier frequencies, specific signaling of the data flow is used for configuring the repetitive pattern, the configured partial physical frames carry normal signaling, and the rest physical frames carry simplified signaling; and secondly, as for all carrier frequencies in the multiple carrier frequencies, in all physical frames on all carrier frequencies bearing one data flow, specific signaling of the data flow is used for configuring the repetitive pattern, the configured partial physical frames carry normal signaling, and the rest physical frames carry simplified signaling. According to the multi-carrier frequency digital multimedia wireless broadcasting system signaling transmission method, signaling overhead is effectively reduced while the signaling is ensured to be reliably received, and the system capacity is improved.
Description
Technical field
The present invention relates to a kind of wireless communication technology, particularly a kind of signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system.
Background technology
Along with the fast development of digital technology and information technology, the whole world has entered digitlization, informationization, network times, and DMB have also been obtained fast development.Present stage, mainly contain following a few class digital TV broadcast standards in the world: digital video broadcasting (the Digital Video Broadcasting in Europe, DVB) Advanced Television Systems Committee (the Advanced Television Systems Committee of standard, the U.S., ATSC) Integrated Services Digital Broadcasting (Integrated Service Digital Broadcasting, the ISDB) standard of standard, Japan.Development is started under the atmosphere that the Digital Television of China grows to even greater heights at international digital just, and be proposed digital TV ground multimedia broadcasting (Digital Television TerrestrialMultimedia Broadcasting, DTMB) standard, China Mobile multimedia broadcasting (China Mobile MultimediaBroadcasting, CMMB) standard etc.
The baseband signal of a wireless digital TV-set broadcast system is made up of a series of physical frame.The so-called superframe of set of a series of continuous physical frame composition.Usually, each physical frame is made up of leading part, signaling moiety and data division.Leading part is used for synchronous or/and Signal analysis; Signaling moiety is used for the modulating-coding transmission means of data of description part, and it also can indicate the position of data to be decoded and receive the necessary information of data, and signaling moiety is made up of multiple signaling field; Data division is for carrying data flow waiting for transmission.
March to networking TV new media channel along with traditional tv media, derive polytype broadcast service, the demand of broadcasting service increases thereupon fast.In order to tackle the quick growth of wireless broadcast information business demand amount, improve the capacity of wireless broadcast system, multi-carrier frequency wireless digital broadcasting system is carried out as a kind of effective means.On the one hand, in multi-carrier frequency wireless digital broadcasting system, in order to reduce preliminary sweep, channel change period, the concept of primary/secondary carrier frequency is arisen at the historic moment, both are used separately as different functional localizations, main carrier frequency is mainly used in supporting the functions such as quick preliminary sweep, channel switch, and assistant carrier frequency is mainly used in supporting continuous reception.In radio data system of future generation, signaling consumption is one of the subject matter that will consider of Signalling Designing, and the functional requirement of assistant carrier frequency simplifies, and provides a kind of new resolving ideas for reducing signaling consumption.On the other hand, under the system architecture of multi-carrier frequency, the mapping method of data flow is more various, and how while the certain preliminary sweep of guarantee, channel switch performance, signalling reliability, effectively can reduce signaling consumption, be a significant problem.
Summary of the invention
Demand in view of the above, the object of the present invention is to provide a kind of signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system, while guarantee signaling reliable reception, effectively can reduce signaling consumption.
For achieving the above object and other relevant objects, the invention provides a kind of signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system, multi-carrier frequency is divided into primary/secondary carrier frequency, for main carrier frequency, with the specific signal deployment repetitions patterns of main carrier frequency, configuration main carrier frequency upper part physical frame carries simplified signaling, all the other physical frames carry normal signaling; For assistant carrier frequency, all assistant carrier frequencies carry in all physical frames of a data flow, with the specific signal deployment repetitions patterns of data flow, configuration section physical frame carries normal signaling, all the other physical frames carry simplified signaling; Wherein, described normal signaling refers to the complete signaling transmitted in multi-carrier frequency digital multimedia wireless broadcast system; Described simplified signaling refers to the signaling of to delete from described normal signaling after certain hour intersegmental part divides or all signaling field value is constant signaling; Described main carrier frequency specific signal deployment repetitions patterns refers to the specific repetitions patterns that the physical frame carrying normal signaling and the physical frame carrying simplified signaling present in main carrier frequency superframe; Described data flow specific signal deployment repetitions patterns refers in all physical frames carrying a data flow on all assistant carrier frequencies, the specific repetitions patterns that the physical frame carrying normal signaling and the physical frame carrying simplified signaling have.
According to the signal transmission method of above-mentioned multi-carrier frequency digital multimedia wireless broadcast system, wherein: described main carrier frequency specific signal deployment repetitions patterns comprises each physical frame on main carrier frequency and all configures the signal deployment pattern carrying normal signaling and present.
According to the signal transmission method of above-mentioned multi-carrier frequency digital multimedia wireless broadcast system, wherein: difference group physical frame assistant carrier frequency carrying different data streams has similar and different repetitions patterns.
According to the signal transmission method of above-mentioned multi-carrier frequency digital multimedia wireless broadcast system, wherein: data flow specific signal deployment repetitions patterns comprises all physical frames assistant carrier frequency carrying a data flow and all configures the signal deployment pattern carrying simplified signaling and present.
According to the signal transmission method of above-mentioned multi-carrier frequency digital multimedia wireless broadcast system, wherein: described main carrier frequency specific signal deployment repetitions patterns and the specific signal deployment repetitions patterns of described data flow all have periodically, and repetition period length is less than highest channel change-over time.
Further, according to the signal transmission method of above-mentioned multi-carrier frequency digital multimedia wireless broadcast system, wherein: a main carrier frequency specific signal deployment repetitions patterns or the specific signal deployment repetitions patterns of data flow change at repetition period intersection, and before signal deployment repetitions patterns changes, this signal deployment repetitions patterns remains unchanged in the certain hour section in units of the repetition period.
According to the signal transmission method of above-mentioned multi-carrier frequency digital multimedia wireless broadcast system, wherein: described simplified signaling and described normal signaling are applicable to top signaling, also be applicable to physical layer signaling, be also applicable to a certain subclass signaling in physical layer signaling or top signaling.
The present invention simultaneously also provides a kind of signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system, for all carrier frequency in multi-carrier frequency, in all physical frames on all carrier frequency of a carrying data flow, carry normal signaling with data flow specific signal deployment repetitions patterns configuration section physical frame, all the other physical frames carry simplified signaling; Wherein, described normal signaling refers to the complete signaling transmitted in multi-carrier frequency digital multimedia wireless broadcast system; Described simplified signaling refers to the signaling of to delete from described normal signaling after certain hour intersegmental part divides or all signaling field value is constant signaling; Described data flow specific signal deployment repetitions patterns refers in all physical frames carrying a data flow on all carrier frequency, the specific signal deployment repetitions patterns that the physical frame carrying normal signaling and simplified signaling has.
According to the signal transmission method of above-mentioned multi-carrier frequency digital multimedia wireless broadcast system, wherein: on all carrier frequency, the difference group physical frame carrying different data streams has similar and different signal deployment repetitions patterns.
According to the signal transmission method of above-mentioned multi-carrier frequency digital multimedia wireless broadcast system, wherein: the specific signal deployment repetitions patterns of described data flow has periodically, and repetition period length is less than highest channel change-over time.
Further, according to the signal transmission method of above-mentioned multi-carrier frequency digital multimedia wireless broadcast system, wherein: a specific signal deployment repetitions patterns of data flow changes at repetition period intersection, and before signal deployment repetitions patterns changes, this signal deployment repetitions patterns remains unchanged in the certain hour section in units of the repetition period.
According to the signal transmission method of above-mentioned multi-carrier frequency digital multimedia wireless broadcast system, wherein: described simplified signaling and described normal signaling are applicable to top signaling, also be applicable to physical layer signaling, be also applicable to a certain subclass signaling in physical layer signaling or top signaling.
As mentioned above, the signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system of the present invention, has following beneficial effect:
The signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system of the present invention while guarantee signaling reliable reception, effectively can reduce signaling consumption, thus improves power system capacity.
Accompanying drawing explanation
Fig. 1 is shown as the signalling schematic diagram of the first embodiment in the signaling transmission system of multi-carrier frequency digital multimedia wireless broadcast system of the present invention;
Fig. 2 is shown as the signalling schematic diagram of the second embodiment in the signaling transmission system of multi-carrier frequency digital multimedia wireless broadcast system of the present invention;
Fig. 3 is shown as the signalling schematic diagram of the 3rd embodiment in the signaling transmission system of multi-carrier frequency digital multimedia wireless broadcast system of the present invention.
Embodiment
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art the content disclosed by this specification can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by embodiments different in addition, and the every details in this specification also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.
It should be noted that, the diagram provided in the present embodiment only illustrates basic conception of the present invention in a schematic way, then only the assembly relevant with the present invention is shown in graphic but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
In the signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system of the present invention, on multiple carrier frequency, part physical frame carries simplified signaling, and all the other physical frames carry normal signaling.Wherein, the simplified signaling transmitted and normal signaling are applicable to top signaling, are also applicable to physical layer signaling, are also applicable to a certain subclass signaling in physical layer signaling or top signaling.
Particularly, normal signaling refers to the complete signaling transmitted in multi-carrier frequency digital multimedia wireless broadcast system.Simplified signaling refers to the signaling of to delete from normal signaling after certain hour intersegmental part divides or all signaling field value is constant signaling.Namely simplified signaling be delete some signaling fields in normal signaling after remaining signaling (signaling is made up of signaling field).Wherein, deleted signaling field signaling field value in certain hour section is constant.During composition simplified signaling, the signaling that in certain hour section, all signaling field values are constant can be deleted from normal signaling, also can delete the certain hour intersegmental part point signaling that signaling field value is constant from normal signaling.
In multi-carrier frequency digital multimedia wireless broadcast system of the present invention, multiple carrier frequency is divided into primary/secondary carrier frequency, and signal transmission method comprises following content:
For main carrier frequency, with the specific signal deployment repetitions patterns of main carrier frequency, configuration main carrier frequency upper part physical frame carries simplified signaling, all the other physical frames carry normal signaling; For assistant carrier frequency, all assistant carrier frequencies carry in all physical frames of a data flow, with the specific signal deployment repetitions patterns of data flow, configuration section physical frame carries normal signaling, all the other physical frames carry simplified signaling.
Wherein, main carrier frequency specific signal deployment repetitions patterns refers to the specific repetitions patterns that the physical frame carrying normal signaling and the physical frame carrying simplified signaling present in main carrier frequency superframe.Especially, on main carrier frequency, each physical frame all configures the signal deployment pattern carrying normal signaling and present, and is the specific signal deployment repetitions patterns of a kind of special main carrier frequency.Data flow specific signal deployment repetitions patterns refers in all physical frames carrying a data flow on all assistant carrier frequencies, the specific repetitions patterns that the physical frame carrying normal signaling and the physical frame carrying simplified signaling have.Difference group physical frame assistant carrier frequency carrying different data streams can have similar and different repetitions patterns.Especially, all configuring to all physical frames assistant carrier frequency carrying a data flow signal deployment pattern carrying simplified signaling and present, is the specific signal deployment repetitions patterns of a kind of special data flow.
Wherein, main carrier frequency specific signal deployment repetitions patterns and the specific signal deployment repetitions patterns of data flow all have periodically, and its repetition period length is less than highest channel change-over time.A main carrier frequency specific signal deployment repetitions patterns or the specific signal deployment repetitions patterns of data flow can change at repetition period intersection, and before signal deployment repetitions patterns changes, this signal deployment repetitions patterns can remain unchanged in the certain hour section in units of the repetition period.
The signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system of the present invention is elaborated below in conjunction with accompanying drawing.
Embodiment one
With reference to Fig. 1, in the present embodiment, multi-carrier frequency digital multimedia wireless broadcast system has 3 carrier frequency, be respectively main carrier frequency, assistant carrier frequency 1, assistant carrier frequency 2, support that transmission 3 kinds has 4 kinds of data flow of different header type altogether: A1, A2, B, C, wherein A1, A2 two kinds of data flow have identical header type.In cycle T, data flow A1 is carried by continuous two physical frames on main carrier frequency, and remainder data stream is carried by a physical frame in one-period on main carrier frequency.
For main carrier frequency, the signal deployment on the physical frame (A1-1, A1-2, A2-1, B-2, C-3) in cycle T is according to following pattern: frame A1-1 carries normal signaling, frame A1-2 carries simplified signaling, frame A2-1 carries normal signaling, frame B-2 carries normal signaling, frame C-3 carries normal signaling.Next cycle T repeats with this signal deployment pattern.
For assistant carrier frequency, the physical frame that data flow A1 maps in one-period is A1-3, A1-4, and wherein A1-3 carries simplified signaling, and A1-4 carries normal signaling.In its next mapping cycle, respective frame A1-7 and A1-8 adopts same signal deployment repetitions patterns, that is: A1-7 carries simplified signaling, and A1-8 carries normal signaling.Equally as can be seen from Figure 1, from after frame A2-1 to before frame A2-4, the signal deployment repetitions patterns of data flow A2 on assistant carrier frequency is: normal signaling, simplified signaling, with this physical frame Mapping implementation signal deployment in conjunction with data flow A2, namely A2-2 carries normal signaling, A2-3 carries simplified signaling, analogize by this, A2-5 carries normal signaling, A2-6 carries simplified signaling.Data stream B all adopts simplified signaling to transmit on multiple assistant carrier frequency, and namely B-1, B-3, B-4, B-6 etc. all carry simplified signaling.To data flow C, count physical frame (such as: C-4) from apart from upper nearest assistant carrier frequency of corresponding main carrier frequency physical frame time, signal deployment pattern when data flow C transmits on multiple assistant carrier frequency is: normal signaling, simplified signaling.
Embodiment two
With reference to Fig. 2, in the present embodiment, multi-carrier frequency digital multimedia wireless broadcast system has 3 carrier frequency, be respectively main carrier frequency, assistant carrier frequency 1, assistant carrier frequency 2, support that transmission 3 kinds has 4 kinds of data flow of different header type altogether: A1, A2, B, C, wherein A1, A2 two kinds of data flow have identical header type.As shown in Figure 2, in certain hour interval, each data flow is carried by a physical frame on main carrier frequency.
In the present embodiment, each physical frame of main carrier frequency carries normal signaling, and each physical frame on two assistant carrier frequencies all carries simplified signaling.Receiver initially accesses or channel switch access from main carrier frequency, and then start continuous reception, therefore on assistant carrier frequency, physical frame can not carry semi-static constant signaling, thus reaches the effect of simplified signaling.Wherein, semi-static constant signaling refer to that value in certain hour section remains unchanged signaling.And simplified signaling is exactly remaining signaling after deletion or whole semi-static constant signaling from normal signaling.
In addition, in multi-carrier frequency digital multimedia wireless broadcast system of the present invention, also following signal transmission method can be adopted: multiple carrier frequency does not have dividing of primary/secondary carrier frequency; For all carrier frequency, in all physical frames on all carrier frequency of a carrying data flow, carry normal signaling with data flow specific signal deployment repetitions patterns configuration section physical frame, all the other physical frames carry simplified signaling.Wherein, data flow specific signal deployment repetitions patterns refers in all physical frames carrying a data flow on all carrier frequency, the specific signal deployment repetitions patterns that the physical frame carrying normal signaling and simplified signaling has.On all carrier frequency, the difference group physical frame of carrying different data streams can have similar and different signal deployment repetitions patterns.
Wherein, the specific signal deployment repetitions patterns of data flow has periodically, and its repetition period length is less than highest channel change-over time.A specific signal deployment repetitions patterns of data flow can change at repetition period intersection, and before signal deployment repetitions patterns changes, this signal deployment repetitions patterns can remain unchanged in the certain hour section in units of the repetition period.
Embodiment three
With reference to Fig. 3, in the present embodiment, multi-carrier frequency digital multimedia wireless broadcast system has 3 carrier frequency, be respectively carrier frequency 1, assistant carrier frequency 2 and assistant carrier frequency 3, support that transmission 3 kinds has 4 kinds of data flow of different header type altogether: A1, A2, B, C, wherein A1, A2 two kinds of data flow have identical header type.With in embodiment two unlike, multiple carrier frequency in multi-carrier frequency digital multimedia wireless broadcast system do not have primary/secondary carrier frequency point.Each carrier frequency all has part physical frame carry simplified signaling, all the other physical frames carry normal signaling, wherein.In physical frame on all carrier frequency of any one data flow of carrying, temporally interconnected physical frame carries normal signaling and simplified signaling, namely on all carrier frequency, in all physical frames of a carrying data flow, carry normal signaling at interval of a physical frame configuration in time, namely also the physical frame configuration of one, interval can carry simplified signaling.The physical frame that receiver can carry normal signaling from a carrier frequency initially accesses or channel switch access, by increasing certain initial scan time and channel change period, exchanges the reduction of signaling consumption for.
In sum, the signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system of the present invention while guarantee signaling reliable reception, effectively can reduce signaling consumption, thus improves power system capacity.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (12)
1. the signal transmission method of a multi-carrier frequency digital multimedia wireless broadcast system, it is characterized in that: multi-carrier frequency is divided into primary/secondary carrier frequency, for main carrier frequency, with the specific signal deployment repetitions patterns of main carrier frequency, configuration main carrier frequency upper part physical frame carries simplified signaling, all the other physical frames carry normal signaling; For assistant carrier frequency, all assistant carrier frequencies carry in all physical frames of a data flow, with the specific signal deployment repetitions patterns of data flow, configuration section physical frame carries normal signaling, all the other physical frames carry simplified signaling;
Wherein, described normal signaling refers to the complete signaling transmitted in multi-carrier frequency digital multimedia wireless broadcast system; Described simplified signaling refers to the signaling of to delete from described normal signaling after certain hour intersegmental part divides or all signaling field value is constant signaling;
Described main carrier frequency specific signal deployment repetitions patterns refers to the specific repetitions patterns that the physical frame carrying normal signaling and the physical frame carrying simplified signaling present in main carrier frequency superframe; Described data flow specific signal deployment repetitions patterns refers in all physical frames carrying a data flow on all assistant carrier frequencies, the specific repetitions patterns that the physical frame carrying normal signaling and the physical frame carrying simplified signaling have.
2. the signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system according to claim 1, is characterized in that: described main carrier frequency specific signal deployment repetitions patterns comprises each physical frame on main carrier frequency and all configures the signal deployment pattern carrying normal signaling and present.
3. the signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system according to claim 1, is characterized in that: difference group physical frame assistant carrier frequency carrying different data streams has similar and different repetitions patterns.
4. the signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system according to claim 1, is characterized in that: data flow specific signal deployment repetitions patterns comprises all physical frames assistant carrier frequency carrying a data flow and all configures the signal deployment pattern carrying simplified signaling and present.
5. the signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system according to claim 1, it is characterized in that: described main carrier frequency specific signal deployment repetitions patterns and the specific signal deployment repetitions patterns of described data flow all have periodically, and repetition period length is less than highest channel change-over time.
6. the signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system according to claim 5, it is characterized in that: a main carrier frequency specific signal deployment repetitions patterns or the specific signal deployment repetitions patterns of data flow change at repetition period intersection, and before signal deployment repetitions patterns changes, this signal deployment repetitions patterns remains unchanged in the certain hour section in units of the repetition period.
7. the signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system according to claim 1, it is characterized in that: described simplified signaling and described normal signaling are applicable to top signaling, also be applicable to physical layer signaling, be also applicable to a certain subclass signaling in physical layer signaling or top signaling.
8. the signal transmission method of a multi-carrier frequency digital multimedia wireless broadcast system, it is characterized in that: for all carrier frequency in multi-carrier frequency, in all physical frames on all carrier frequency of a carrying data flow, carry normal signaling with data flow specific signal deployment repetitions patterns configuration section physical frame, all the other physical frames carry simplified signaling;
Wherein, described normal signaling refers to the complete signaling transmitted in multi-carrier frequency digital multimedia wireless broadcast system; Described simplified signaling refers to the signaling of to delete from described normal signaling after certain hour intersegmental part divides or all signaling field value is constant signaling;
Described data flow specific signal deployment repetitions patterns refers in all physical frames carrying a data flow on all carrier frequency, the specific signal deployment repetitions patterns that the physical frame carrying normal signaling and simplified signaling has.
9. the signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system according to claim 8, is characterized in that: on all carrier frequency, and the difference group physical frame of carrying different data streams has similar and different signal deployment repetitions patterns.
10. the signal transmission method of multi-carrier frequency digital multimedia wireless broadcast system according to claim 8, is characterized in that: the specific signal deployment repetitions patterns of described data flow has periodically, and repetition period length is less than highest channel change-over time.
The signal transmission method of 11. multi-carrier frequency digital multimedia wireless broadcast systems according to claim 10, it is characterized in that: a specific signal deployment repetitions patterns of data flow changes at repetition period intersection, and before signal deployment repetitions patterns changes, this signal deployment repetitions patterns remains unchanged in the certain hour section in units of the repetition period.
The signal transmission method of 12. multi-carrier frequency digital multimedia wireless broadcast systems according to claim 8, it is characterized in that: described simplified signaling and described normal signaling are applicable to top signaling, also be applicable to physical layer signaling, be also applicable to a certain subclass signaling in physical layer signaling or top signaling.
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