CN101064854A - Method for realization of scheduling data transmitting time - Google Patents
Method for realization of scheduling data transmitting time Download PDFInfo
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- CN101064854A CN101064854A CN 200610076566 CN200610076566A CN101064854A CN 101064854 A CN101064854 A CN 101064854A CN 200610076566 CN200610076566 CN 200610076566 CN 200610076566 A CN200610076566 A CN 200610076566A CN 101064854 A CN101064854 A CN 101064854A
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Abstract
The invention discloses a realizing method of attemper data emission time; the method ensures the theory time interval supported by programs based on playing speed of program and size of optimized buffer of user terminal; and ensures the size of frame multiplexed based on theory time interval; ensures real time interval of program based on ensured theory time interval and said size of frame. The method in the invention considers character and property of program aiming at data in emission end, so when receiving end receives data, the energy received is increased; it can decrease energy consumption generated for receiving data, length of time of receiving end is extended, and contentment of user is increased evidently.
Description
Technical field
The present invention relates to wireless communication field, be specifically related to a kind of data dispatching implementation method of launch time.
Background technology
Along with development of Communication Technique, multimedia communication is popularized just gradually, the user can use subscriber equipment (UE) and multimedia communications system to carry out data communication, with the increasing multimedia service of acceptance from multimedia communications system, as: comprise the mobile video broadcast business of mobile digital TV business etc.Present mobile video broadcast business is usually all based on OFDM (OFDM) modulation system, as: hand held television broadcast system (DVB Handheld system, DVB-H), FLO system etc.
In actual applications, the transmitting terminal of multimedia communications system on timeslice, and is multiplexed into the data map of different programs in the frame structure with timeslice, will use the resulting mass data frame of this multiplex mode again and launch with pulse mode successively.
It should be noted that in any two adjacent Frames, be that the time interval between two timeslices of which program all is identical, and this time interval is generally equal to the frame length of described Frame.Obviously, this unified time, mode was not at interval considered the characteristics of different programs at all, as: the data of different programs are usually all corresponding to different optimal transmission rates; Certainly, the characteristic of multimedia communications system receiving terminal is not considered yet, as: as the buffer memory that the user terminal of multimedia communications system receiving terminal has different sizes, cache size is that can user terminal efficiently receive one of key factor of data.When practical application, usually the described optimal transmission rate of program directly is called the playback rate of program.
As seen, in multimedia communications system based on the OFDM modulation system, owing to do not consider the characteristics of different programs and the characteristic of different receiving terminals, so receiving terminal often can't efficiently receive the data from the multimedia communications system transmitting terminal, this makes receiving terminal very easily produce too high energy consumption when receiving data, and then obviously shorten the duration of the sustainable work of receiving terminal, and finally cause the obvious reduction of user satisfaction.
Such as: the optimal transmission rate of the data of program A and program B is respectively 384kbps, 128kbps, when the cache size of user terminal is 2Mbit, maximum being similar to of the time interval of emission program A timeslice can be set to 5S, and the time interval maximum of emission program B timeslice is then approximate can be set to 16S.Usually launch at present the unified 5S that is set to of the time interval of program A, B timeslice.Obviously, the 5S during with respect to user terminal program receiving A data is for the time interval, and the time interval during user terminal program receiving B data has been shortened 2/3 relatively; This makes user terminal have to when program receiving B data to improve received energy adapting to the time interval that is shortened relatively, and finally to cause the energy of user terminal program receiving B data time institute loss be 3 times of program receiving A data time institute loss of energy.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of data dispatching implementation method of launch time, reduces receiving terminal because of receiving the energy consumption that data produce, and improves user satisfaction.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses a kind of data dispatching implementation method of launch time, this method may further comprise the steps:
A. according to the preferred cache size of the user terminal of the playback rate of each program in the multimedia communications system and program receiving determine each program theoretical time interval of supporting respectively;
B. determine program is carried out the frame length of multiplexing back gained according to the theoretical time interval of each program;
C. according to the fixed theoretical time interval of each program and described frame length, determine the real time interval of each program.
Steps A comprises:
With the playback rate of described preferred cache size divided by described program, again with remove the result multiply by the adjustment coefficient, and will take advantage of theoretical time interval of supporting as this program of value.
The load that described adjustment coefficient is caused when depending on 2/ layer of 3 encapsulation packing of layer.
Step B comprises:
Fixed each program in theoretical time interval of supporting respectively, select a minimum theoretical time interval as described frame length.
Step C comprises:
With theoretical time interval of program divided by described frame length, will remove the result multiply by described frame length again after rounding up, and will take advantage of value as real time of program at interval.
Steps A comprises: with the playback rate of described preferred cache size divided by described program, again with remove the result multiply by the adjustment coefficient, and will take advantage of theoretical time interval of supporting as this program of value;
Step B comprises: fixed each program in theoretical time interval of supporting respectively, select a minimum theoretical time interval as described frame length;
Step C comprises: with theoretical time interval of program divided by described frame length, will remove the result multiply by described frame length again after rounding up, and will take advantage of value as real time of program at interval.
This method further comprises: send to receiving terminal and can indicate fixed program real time interlude sheet temporal information.
This method further may further comprise the steps:
D. by the program that will delete is provided with, stop in order to launch the data processing that this program data carries out;
E. delete the described program that to delete; And, Frame when not deleting this program and the adjacent subsequently Frame of deleting behind this program thereof, according to the timeslice duration of this program upgrade each program when not deleting described program Frame and the actual interval time between the adjacent subsequently Frame of deleting behind the described program;
F. data of launching each program according to each the program actual interval time after upgrading.
Among the step D, described being set to of carrying out:
The real time of the described program that will delete is set to the system exception value.
In the step e, described update method is:
At the Frame of deleting behind the described program, deduct the timeslice duration of deleted program with the actual interval time that is arranged in each program after the deleted program in the Frame at Frame, and with new actual interval time of each program that subtracts each other gained as respective program when not deleting described program Frame and the actual interval time between the adjacent subsequently Frame of deleting behind the described program.
Further according to program real time interval sheet temporal information update time after upgrading.
Definite mode of described preferred cache size is: at the cache size of each user terminal that receives same program, select a minimum and the cache size supported by multimedia communication protocol.
Compared with prior art, the implementation method of data dispatching provided by the present invention launch time needs to determine each program institute theoretical time interval of support respectively according to the preferred cache size of the user terminal of the playback rate of each program in the multimedia communications system and program receiving; And according to definite frame length that program is carried out multiplexing back gained of the theoretical time interval of each program; According to the fixed theoretical time interval of each program and described frame length, determine the real time interval of each program again.
Obviously, the inventive method has been considered the characteristics of program and the characteristic of receiving terminal at the data of emission, so the situation of received energy can not appear having to improve in receiving terminal when receiving these data; This obviously can obviously reduce receiving terminal because of receiving the energy consumption that data produce, so significant prolongation the work duration of receiving terminal, and make that also user satisfaction is improved significantly.
Description of drawings
Fig. 1 is the flow chart of the realization time slice scheduling of a preferred embodiment of the present invention;
Fig. 2 is the timeslice sequential schematic diagram based on the deadline sheet scheduling of Fig. 1;
Fig. 3 is the flow chart of the realization time slice scheduling of another preferred embodiment of the present invention;
Fig. 4 a is not for deleting the timeslice sequential schematic diagram of program as yet;
Fig. 4 b is for finishing timeslice sequential schematic diagram after the deletion based on Fig. 3 to program among Fig. 4 a.
Embodiment
Below in conjunction with drawings and the specific embodiments to the detailed description of the invention.
The implementation method of data dispatching provided by the present invention launch time needs to determine each program institute theoretical time interval of support respectively according to the preferred cache size of the user terminal of the playback rate of each program in the multimedia communications system and program receiving; And according to definite frame length that program is carried out multiplexing back gained of the theoretical time interval of each program; According to the fixed theoretical time interval of each program and described frame length, determine the real time interval of each program again.
Referring to Fig. 1, Fig. 1 is the flow chart of the realization time slice scheduling of a preferred embodiment of the present invention, and this flow process may further comprise the steps:
Step 110: according to the preferred cache size of the user terminal of the playback rate of each program in the multimedia communications system and program receiving determine each program theoretical time interval of supporting respectively.Concrete grammar is generally:
The playback rate Vi and the described preferred cache size Buffer of each program are brought in the formula (1), and according to the account form of formula (1) obtain at each program of described preferred cache size the theoretical time interval Delta-ti that supports respectively
Max
Described formula (1) is: Delta-ti
Max=Buffer/Vi* β;
Wherein, i=1,2 ..., N; Then for adjusting coefficient, its size depends on and can encapsulate the load that is caused when packing with layer 2 (L2)/layer 3 (L3) that prior art is obtained β.As seen, the theoretical time interval that each program is supported is: the preferred cache size of described user terminal is divided by the playback rate of this program, again with remove the result multiply by and adjust resulting value after the coefficient.
In actual applications, can use the playback rate that prior art is known each program, as: in the multimedia communications system transmitting terminal, be provided with the playback rate of each program, therefore can directly read each playing programs speed of setting.
Definite mode of described preferred cache size is generally: at the cache size of each user terminal that receives same program, select a minimum and the cache size supported by multimedia communication protocol.Cache size as for each user terminal, then can in the signalling interactive process between multimedia communications system transmitting terminal and the user terminal, obtain, as: user terminal carries the cache size of self in the service request that sends to the multimedia communications system transmitting terminal, the multimedia communications system transmitting terminal then reads the cache size that comprises in the service request of receiving.
Step 120: the frame length T that determines program is carried out multiplexing back gained according to the theoretical time interval of each program
MuxConcrete grammar is generally: fixed each program in theoretical time interval of supporting respectively, select a minimum theoretical time interval as described frame length.
Step 130:, determine the real time interval of each program according to the fixed theoretical time interval of each program and described frame length.Concrete grammar is generally: the theoretical time interval of each program and described frame length are brought in the formula (2), and obtain the real time interval D elta-ti of each program according to the account form of formula (2).
Described formula (2) is:
Wherein, i=1,2 ..., N;
Expression rounds up.As seen, the real time of each program is spaced apart: the theoretical time interval of program is divided by described frame length, will remove the result multiply by resulting value after the described frame length after rounding up again; Obviously, this value must be the integral multiple of described frame length.
So far, the real time of each program has just been determined at interval, and the determined real time has taken into full account the characteristics of different programs at interval, as: the data of different programs are usually all corresponding to different optimal transmission rates, and the real time of different programs at interval just can be according to described optimal transmission rate by calculating; Certainly, the characteristic of multimedia communications system receiving terminal has also obtained taking into full account, usually have different preferred cache size as: the user terminal that receives different programs, the real time of different programs just can calculate according to the preferred cache size of the user terminal of reception respective program at interval.
After having determined the real time interval of each program, the transmitting terminal of multimedia communications system just can according to the described real time of determining use at interval prior art with the data map of each program on timeslice, and timeslice is multiplexed in the frame structure, will use the resulting Frame of this multiplex mode again and launch.Because the described Frame of emission has been considered the characteristics of program and the characteristic of receiving terminal, so the situation of received energy can not appear having to improve in receiving terminal again when receiving these Frames; This obviously can obviously reduce receiving terminal because of receiving the energy consumption that data produce, so significant prolongation the work duration of receiving terminal, and make that also user satisfaction is improved significantly.
Certainly, can normally receive these Frames in order to guarantee receiving terminal, the transmitting terminal of multimedia communications system need send to receiving terminal with the timeslice temporal information; This timeslice temporal information is used to indicate the real time interval of fixed described program at least, to guarantee that receiving terminal can be at normal receiving data frames of indicated time of timeslice temporal information.Described timeslice temporal information is carried on usually in the control signaling that receiving terminal sends, this control signaling comprises usually: Control Parameter such as data frame coding and decoding mode, planisphere mapping mode, frame length, timeslice temporal information are used for guaranteeing that receiving terminal can be according to controlling the correct data that receive of handling of Control Parameter that signaling comprises.
By the above as seen, can use flow process shown in Figure 1 and carry out time slice scheduling, to realize the flexible setting at interval of each program real time at program.In actual applications, it is at interval varied that program is carried out the formed program of the time slice scheduling real time, is that example was briefly described at interval to sheet scheduling back formed program real time deadline below with Fig. 2.
Referring to Fig. 2, Fig. 2 is the timeslice sequential schematic diagram based on the deadline sheet scheduling of Fig. 1.Among Fig. 2, the multiplexing timeslice that program 1,2,3 is arranged in the Frame that has, the then multiplexing timeslice that program 1,2,4 is arranged in the Frame that has; And real time of program 1,2,3,4 all is to determine under the prerequisite of the characteristic of characteristics that taken into full account different programs and receiving terminal at interval: the real time of program 1,2 at interval all with described frame length T
MuxEquate that the real time of program 3,4 then is T at interval
Mux2 times.
Carry out in the process of follow-up proper communication at multimedia communications system transmitting terminal and receiving terminal, the time regular meeting run into the situation that the multimedia communications system transmitting terminal will be deleted certain program.Present applied program deletion mode is generally: restart the multimedia communications system transmitting terminal; The program that deletion will be deleted in restarting process, and the real time of each program of residue of resetting is at interval; Restart finish after, the multimedia communications system transmitting terminal is launched the data of each program of residue at interval according to the described real time of resetting.
Obviously, there is such problem in present applied program deletion mode: the receiving terminal that receives not deleted program normal program receiving data in a period of time.This is unfavorable for the business development of multimedia communications system very much, and will seriously reduce user satisfaction.In order to address this problem, introduce program deletion mode provided by the present invention below.
Referring to Fig. 3, Fig. 3 is the flow chart of the realization time slice scheduling of another preferred embodiment of the present invention, and this flow process may further comprise the steps:
Step 310: the program that delete is provided with, makes the multimedia communications system transmitting terminal stop this program is carried out data processing.Concrete grammar is generally: the real time of the program that will delete is set to the system exception value in the multimedia communications system transmitting terminal; The multimedia communications system transmitting terminal is when the emission data, the real time that can detect this program is set to the system exception value at interval, and then determine that this program has taken place unusually, therefore stop this program is carried out data processing, and continue other program is carried out normal data processing.
Step 320: the multimedia communications system transmitting terminal is used the described program that the prior art deletion will be deleted; And, Frame when not deleting this program and the adjacent subsequently Frame of deleting behind this program thereof, according to the timeslice duration of this program upgrade each program when not deleting described program Frame and the actual interval time between the adjacent subsequently Frame of deleting behind the described program.Concrete update method is generally:
At the Frame of deleting behind the described program, deduct the timeslice duration of deleted described program with the actual interval time that is arranged in each program after the deleted program in the Frame at Frame, and with new actual interval time of each program that subtracts each other gained as respective program when not deleting described program Frame and the actual interval time between the adjacent subsequently Frame of deleting behind the described program; And at each Frame after the Frame of deleting behind the described program, the actual interval time of remaining each program is constant.
Step 330: the data that the multimedia communications system transmitting terminal is launched each program according to each the program actual interval time after upgrading.Certainly, for the time that guarantees the receiving terminal receiving data frames can match with each the program actual interval time after upgrading, the transmitting terminal of multimedia communications system need upgrade the timeslice temporal information according to each the program actual interval time after upgrading, and the timeslice temporal information after will upgrading sends to receiving terminal, to guarantee that receiving terminal can be at normal receiving data frames of indicated time of timeslice temporal information.Timeslice temporal information after the renewal is carried on usually in the control signaling that receiving terminal sends.
In actual applications, step 310 and step 320 are normally carried out simultaneously; The zero-time of step 330 then falls behind a frame length than step 310,320 usually.
By the above as seen, flow process shown in Figure 3 can guarantee multimedia communications system transmitting terminal smooth certain program of deletion under the prerequisite of not restarting, and the receiving terminal that receives not deleted program can continue normal program receiving data according to the timeslice temporal information after the renewal of receiving, and can not appear in a period of time normally program receiving data conditions.This obviously helps the business development of multimedia communications system very much, and can obviously improve user satisfaction.
In actual applications, it is varied at interval that program is finished the formed program real time in when deletion, below with Fig. 4 a, Fig. 4 b be example to the deletion program after the formed program real time be briefly described at interval.
At first referring to Fig. 4 a, Fig. 4 a is not for deleting the timeslice sequential schematic diagram of program as yet.Shown in Fig. 4 a, the timeslice duration of program 1,2,3 is respectively: T1, T2, T3, the real time of program 1,2,3 then is respectively at interval: delta-t1, delta-t2, delta-t3.
Next referring to Fig. 4 b, Fig. 4 b is for finishing timeslice sequential schematic diagram after the deletion based on Fig. 3 to program among Fig. 4 a.Shown in Fig. 4 b, in the process of normal transmission timeslice, program 2 is deleted.In this case, between Frame when not deleting program 2 and the adjacent subsequently Frame of deleting behind the program 2, the actual interval time of program 3 has just become (delta-t3)-T2 by original delta-t3; Whenever the actual interval time of program 1 then constant, and at each Frame after the Frame of deleting behind the program 2, the actual interval time of program 3 is also constant.
In actual applications, the flow process of Fig. 1, Fig. 3 all can be called the time slice scheduling flow process, be the emphasis difference that different flow processs are dispatched timeslice; And method involved in the present invention is normally based on the OFDM modulation system.
By the above as can be seen, the method for realization time slice scheduling provided by the present invention can obviously reduce the energy consumption that receiving terminal produces because of the reception data, and can obviously improve user satisfaction.
Claims (12)
1, the implementation method of a kind of data dispatching launch time is characterized in that this method may further comprise the steps:
A. according to the preferred cache size of the user terminal of the playback rate of each program in the multimedia communications system and program receiving determine each program theoretical time interval of supporting respectively;
B. determine program is carried out the frame length of multiplexing back gained according to the theoretical time interval of each program;
C. according to the fixed theoretical time interval of each program and described frame length, determine the real time interval of each program.
2, the method for claim 1 is characterized in that, steps A comprises:
With the playback rate of described preferred cache size divided by described program, again with remove the result multiply by the adjustment coefficient, and will take advantage of theoretical time interval of supporting as this program of value.
3, method as claimed in claim 2 is characterized in that, the load that described adjustment coefficient is caused when depending on 2/ layer of 3 encapsulation packing of layer.
4, method as claimed in claim 1 or 2 is characterized in that, step B comprises:
Fixed each program in theoretical time interval of supporting respectively, select a minimum theoretical time interval as described frame length.
5, method as claimed in claim 1 or 2 is characterized in that, step C comprises:
With theoretical time interval of program divided by described frame length, will remove the result multiply by described frame length again after rounding up, and will take advantage of value as real time of program at interval.
6, the method for claim 1 is characterized in that,
Steps A comprises: with the playback rate of described preferred cache size divided by described program, again with remove the result multiply by the adjustment coefficient, and will take advantage of theoretical time interval of supporting as this program of value;
Step B comprises: fixed each program in theoretical time interval of supporting respectively, select a minimum theoretical time interval as described frame length;
Step C comprises: with theoretical time interval of program divided by described frame length, will remove the result multiply by described frame length again after rounding up, and will take advantage of value as real time of program at interval.
7, the method for claim 1 is characterized in that, this method further comprises: send to receiving terminal and can indicate fixed program real time interlude sheet temporal information.
8, as claim 1,2,3,6 or 7 described methods, it is characterized in that this method further may further comprise the steps:
D. by the program that will delete is provided with, stop in order to launch the data processing that this program data carries out;
E. delete the described program that to delete; And, Frame when not deleting this program and the adjacent subsequently Frame of deleting behind this program thereof, according to the timeslice duration of this program upgrade each program when not deleting described program Frame and the actual interval time between the adjacent subsequently Frame of deleting behind the described program;
F. data of launching each program according to each the program actual interval time after upgrading.
9, method as claimed in claim 8 is characterized in that, among the step D, and described being set to of carrying out:
The real time of the described program that will delete is set to the system exception value.
10, method as claimed in claim 8 is characterized in that, in the step e, described update method is:
At the Frame of deleting behind the described program, deduct the timeslice duration of deleted program with the actual interval time that is arranged in each program after the deleted program in the Frame at Frame, and with new actual interval time of each program that subtracts each other gained as respective program when not deleting described program Frame and the actual interval time between the adjacent subsequently Frame of deleting behind the described program.
11, method as claimed in claim 8 is characterized in that, further according to program real time interval sheet temporal information update time after upgrading.
12, the method for claim 1, it is characterized in that, definite mode of described preferred cache size is: at the cache size of each user terminal that receives same program, select a minimum and the cache size supported by multimedia communication protocol.
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| CN 200610076566 CN101064854A (en) | 2006-04-30 | 2006-04-30 | Method for realization of scheduling data transmitting time |
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| CN 200610076566 CN101064854A (en) | 2006-04-30 | 2006-04-30 | Method for realization of scheduling data transmitting time |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199895A (en) * | 2013-01-09 | 2013-07-10 | 北京卓越信通电子股份有限公司 | System for remotely accessing and playing audio frequency |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199895A (en) * | 2013-01-09 | 2013-07-10 | 北京卓越信通电子股份有限公司 | System for remotely accessing and playing audio frequency |
| CN103199895B (en) * | 2013-01-09 | 2015-08-12 | 北京卓越信通电子股份有限公司 | A kind of audio frequency remote access and Play System |
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