CN100550717C - A kind of method that reduces number of receiving overhead information in terminal of mobile multimedia broadcast - Google Patents
A kind of method that reduces number of receiving overhead information in terminal of mobile multimedia broadcast Download PDFInfo
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- CN100550717C CN100550717C CNB200610149706XA CN200610149706A CN100550717C CN 100550717 C CN100550717 C CN 100550717C CN B200610149706X A CNB200610149706X A CN B200610149706XA CN 200610149706 A CN200610149706 A CN 200610149706A CN 100550717 C CN100550717 C CN 100550717C
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Abstract
A kind of method that reduces number of receiving overhead information in terminal of mobile multimedia broadcast, may further comprise the steps: the transmitter side of mobile multimedia broadcast system adopts time division way to separate transmission Overhead and business datum, wherein, increase by one and show that current Overhead upgrades indication A in Overhead, the Overhead that whether Overhead of an indication of increase next frame upgrades in the business datum section upgrades indication B; The transmitter side of mobile multimedia broadcast system at first sends initial Overhead and Overhead renewal indication A to receiving terminal, receiving terminal obtains needed business according to the initial Overhead that receives, and the Overhead in the business datum section upgrades indication B, and B and A compared, if B and A do not wait, expression next frame Overhead has renewal, and when receiving terminal reads Overhead after the renewal according to the state decision of self.
Description
Technical field
The present invention relates to the digital mobile communication field, relate in particular to a kind of method that reduces number of receiving overhead information in terminal of mobile multimedia broadcast.
Background technology
In recent years, Digital Video Broadcast Handheld), MediaFLO (the single forward link of medium: Media Forward Link Only) etc. of the U.S. digital mobile multimedia broadcasting technology and standard evolution are rapid, and for example (the digital video broadcast-handheld formula receives Ou Zhou DVB-H:.
Compare with analogue technique, a great advantage of digital mobile multimedia broadcasting network is exactly: under the prerequisite that satisfies professional quality of service requirement, a broadcast channel can improve the utilization ratio of Radio Resource so greatly by the multiplexing transmission of supporting a plurality of business.The road code stream that we obtain after with a plurality of service integrations is called the broadcasting code stream, for receiving terminal, owing on one tunnel broadcasting code stream a plurality of business are arranged, in order to receive required one or more business quickly and accurately, receiving terminal need one can this broadcasting of accurate description code stream in broadcast channel resource information of each professional use, these information provide necessary help for the payload data that receiving terminal fast, accurately receives required business, because these information do not belong to professional payload data, so we are referred to as Overhead.
In mobile multimedia broadcast system, because the importance of Overhead generally can be taked better protection measure (for example using channel coding technology, low order constellation mapping such as the BPSK with better receiving feature) to Overhead in the mobile multimedia broadcast system; Simultaneously for the consideration of the time of reception that reduces the mobile multimedia receiving terminal, generally the payload user data with Overhead and miscellaneous service separates transmission.
In mobile multimedia broadcast system, the circulation of one tunnel broadcast codes is often carried out multiplexing according to time division way, with sometime the section the broadcasting code stream be called a frame, data in one frame have comprised the Overhead of this frame and the data segment of miscellaneous service, and Overhead is generated when multiplexing by the network side transmitting terminal and sends in the zero hour of a frame.
Because Overhead is to separate to transmit with the payload data of business, so how to guarantee that receiving terminal is when receiving required business, can reduce the number of times that obtains Overhead, receiving terminal is in time notified in the variation that can guarantee Overhead again, is one of emphasis of a mobile multimedia broadcast system design.
Summary of the invention
The purpose of this invention is to provide a kind of method that reduces number of receiving overhead information in terminal of mobile multimedia broadcast, when the mobile media broadcasting network receiving terminal receives required business, can guarantee in time to notify receiving terminal with the variation of Overhead, can reduce the number of times that terminal is obtained Overhead again, thereby reduce the reception operating time of receiving terminal, realize better economize on electricity.
For achieving the above object, the present invention takes following technical scheme:
A kind of method that reduces number of receiving overhead information in terminal of mobile multimedia broadcast is characterized in that:
The transmitter side of mobile multimedia broadcast system adopts time division way to separate transmission Overhead and business datum, wherein, increase by one and show that current Overhead upgrades indication A in Overhead, the Overhead that whether Overhead of an indication of increase next frame upgrades in the business datum section upgrades indication B.
Described method further comprises: the transmitter side of mobile multimedia broadcast system at first sends initial Overhead and Overhead renewal indication A to receiving terminal, receiving terminal obtains needed business according to the initial Overhead that receives, and the Overhead in the business datum section upgrades indication B, and B and A compared, if B and A do not wait, expression next frame Overhead has renewal, and when receiving terminal reads Overhead after the renewal according to the state decision of self.
Transmitter side can be given Overhead and upgrade the concrete numerical value of indication, updating cost information each time, and Overhead upgrades indication and all initial value is carried out+1 operation;
The numerical value that above-mentioned Overhead upgrades indication can circulate within the specific limits, overflows if repeatedly carry out+1 operation, then begins to circulate next time.
But the Overhead that the initial Overhead of receiving terminal buffer memory upgrades in the indication upgrades indication A.
, comparative result equates that represent that then Overhead does not change in the next frame, receiving terminal need not receive Overhead in subsequent frame, receive only business datum and get final product if being A with B.
When receiving terminal reads Overhead after the renewal, but the Overhead in the Overhead behind the buffer update upgrades indication as A simultaneously.
The present invention has increased the Overhead indication in Overhead and business datum, receiving terminal is by comparing the two, whether the Overhead of knowing next frame has renewal, thereby can determine whether to receive new Overhead as required, both guaranteed in time to notify terminal with the renewal of Overhead, reduce the number of times of receiving terminal reception Overhead again, reduced the reception operating time of receiving terminal, realized better economize on electricity.
Description of drawings
Fig. 1 is the composition of mobile multimedia broadcast system;
Fig. 2 is the structural representation of mobile multimedia broadcast system broadcasting code stream frame;
Fig. 3 is the position that Overhead upgrades indication in the business datum section;
Fig. 4 is the position that Overhead upgrades indication in the Overhead;
Fig. 5 is the indication of process chart receiving terminal upgrades to(for) Overhead.
Embodiment
How to the present invention is directed to reducing the variation that can guarantee Overhead when receiving terminal obtains the Overhead number of times again and in time notify receiving terminal and reduced the complexity that receiving terminal handles and proposed a new solution, the specific implementation process is as follows:
The first, in mobile multimedia broadcast system, adopt time division way to separate transmission Overhead and business datum, the data of different business also adopt the multiplexing back of time division way to transmit; The time interval of twice Overhead appearance in the broadcasting code stream is called a frame, like this, one tunnel broadcasting code stream has comprised the Overhead of this frame and the data segment of miscellaneous service, and comprise all in Overhead and the business datum section that Overhead upgrades indication, Overhead is generated when multiplexing by the Mobile Multimedia Broadcasting emitting side and sends in the zero hour of a frame.
The second, give a concrete numerical value to expense information updating indication, updating cost information each time, Overhead upgrades indication will be carried out initial value+1 operation.
The concrete numerical value that above-mentioned Overhead upgrades indication can adopt the set-up mode that circulates within the specific limits, if overflow after repeatedly carrying out+1, then begins to circulate next time.
The 3rd, receiving terminal is when obtaining Overhead, and the Overhead that can obtain simultaneously together to send with Overhead upgrades indication (supposing that concrete numerical value is A); But this Overhead of receiving terminal buffer memory upgrades indication.
The 4th, the Overhead that increases in the business datum section upgrades indication, be used to indicate the Overhead of next frame whether to upgrade, when receiving terminal receives required business datum, can from professional data segment, obtain Overhead simultaneously and upgrade indication (supposing that concrete numerical value is B);
The 5th, receiving terminal compares B and A, if B equates that with A expression next frame Overhead does not upgrade; If B and A do not wait, expression next frame Overhead has renewal, and when receiving terminal reads Overhead after the renewal according to the state decision of self.
Like this, do not upgrade when next frame overhead information, receiving terminal just need not receive Overhead in next frame, receive only business datum, thereby has reduced the number of times of receiving terminal reception Overhead, has reduced the reception operating time of receiving terminal; When the Overhead of next frame had renewal, receiving terminal can determine whether to receive new Overhead as required.
Below in conjunction with accompanying drawing method of the present invention is described in further detail.
As shown in Figure 1, the mobile media broadcasting network system mainly is made up of Mobile Multimedia Broadcasting emission system and Mobile Multimedia Broadcasting receiving system (terminal), interface between the two is a wireless air interface, and the Mobile Multimedia Broadcasting service is issued Mobile Multimedia Broadcasting receiving system from emission system in the mode of electromagnetic signal by air interface.
The mobile media broadcasting network system is the signal that its receiving terminal provides after multiplexing, the structure of broadcasting code stream frame as shown in Figure 2: in a frame, Overhead is positioned at before each business datum.
In the business datum section, increase an Overhead and upgraded indication, be used for indicating the next frame Overhead whether renewal is arranged.In the mobile media broadcasting network system, Overhead upgrades indication and all can occur in each professional business datum section.The position of Overhead renewal indication as shown in Figure 3 in the business datum.
Also have an Overhead to upgrade indication in Overhead, show more new situation of current Overhead, the position of Overhead renewal indication as shown in Figure 4 in the Overhead.
Fig. 5 has illustrated receiving terminal to upgrade the processing procedure of indication for Overhead:
Mobile multimedia broadcast receiving terminal start back receives initial Overhead, and the Overhead that receives simultaneously in the Overhead upgrades indication A and buffer memory, and then obtains required some business;
Receiving terminal can obtain Overhead from professional data segment simultaneously and upgrade indication B when receiving required mobile multi-media broadcasting service;
Receiving terminal compares A and B, if A equates that with B expression next frame Overhead does not change; If A and B are unequal, changing appears in expression next frame Overhead, and receiving terminal need obtain the Overhead after the renewal, and the Overhead that buffer memory is new upgrades indication simultaneously.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those skilled in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (6)
1. method that reduces number of receiving overhead information in terminal of mobile multimedia broadcast is characterized in that:
The transmitter side of mobile multimedia broadcast system adopts time division way to separate transmission Overhead and business datum, wherein, increase by one and show that current Overhead upgrades indication A in Overhead, the Overhead that whether Overhead of an indication of increase next frame upgrades in the business datum section upgrades indication B;
The transmitter side of mobile multimedia broadcast system at first sends initial Overhead and Overhead renewal indication A to receiving terminal, receiving terminal obtains needed business according to the initial Overhead that receives, and the Overhead in the business datum section upgrades indication B, and B and A compared, if B and A do not wait, expression next frame Overhead has renewal, and when receiving terminal reads Overhead after the renewal according to the state decision of self.
2. method according to claim 1 is characterized in that: described transmitter side is given Overhead and is upgraded the concrete numerical value of indication, updating cost information each time, and Overhead upgrades indication initial value is carried out+1 operation.
3. method according to claim 2 is characterized in that: the numerical value that described Overhead upgrades indication circulates within the specific limits, begins to circulate after overflowing next time.
4. method according to claim 1 is characterized in that: the Overhead that the initial Overhead of receiving terminal buffer memory upgrades in the indication upgrades indication A.
5. method according to claim 1 is characterized in that, further comprises, the Overhead in the Overhead behind the receiving terminal buffer update upgrades indication A.
6. method according to claim 1 is characterized in that, comprises a plurality of different business in the described frame, and transmit the multiplexing back of the The data time division way of different business.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610149706XA CN100550717C (en) | 2006-10-23 | 2006-10-23 | A kind of method that reduces number of receiving overhead information in terminal of mobile multimedia broadcast |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200610149706XA CN100550717C (en) | 2006-10-23 | 2006-10-23 | A kind of method that reduces number of receiving overhead information in terminal of mobile multimedia broadcast |
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| CN1960237A CN1960237A (en) | 2007-05-09 |
| CN100550717C true CN100550717C (en) | 2009-10-14 |
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| US9036496B2 (en) * | 2012-01-09 | 2015-05-19 | Qualcomm Incorporated | Devices and methods for facilitating overhead message updates in wireless communications systems |
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Non-Patent Citations (3)
| Title |
|---|
| CN 1 460 350 A 2003.12.03 |
| CN 1 650 658 A 2005.08.03 |
| CN 1 825 797 A 2006.08.30 |
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