CN101989890A - Method and device for superimposing coding - Google Patents
Method and device for superimposing coding Download PDFInfo
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Abstract
The embodiment of the invention discloses a method and device for superimposing coding, relating to the wireless communication field. In the method and device for superimposing the coding, constellation superimposing coding can be realized aiming at a plurality of transmission stations. The method for superimposing the coding provided by the embodiment of the invention comprises the following steps: obtaining transmission parameter information of an superimposed signal needed to be transmitted by a base station; adjusting the transmission parameters of the superimposed signal in the station according to the transmission parameter information of the superimposed signal; and transmitting the superimposed signal according to the adjusted transmission parameters to carry out constellation superimposing coding on the superimposed signal and the superimposed signal transmitted by the base station. The method and device for superimposing the coding is suitable for the constellation superimposing coding with a plurality of the transmission stations.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of method and device of supercomposed coding.
Background technology
Constellation overlapped encoding (Superposition Coding) is that (Ultra High Data Rate, special technology UHDR) can effectively improve systematic function to the superelevation data rate.
Prior art is used the throughput that superimposed code improves wireless communication system, be transmitting terminal can be in the modulation space the two kinds or more of information flow of stack, sending to a plurality of connections of a plurality of receiving stations or a receiving station, and receiving station obtains different information flows according to different demodulation rules.Particularly, when using constellation overlapped encoding, transmitting terminal can still adopt different transmitting powers at the multiplexing identical frequency resource of a plurality of users.
As shown in Figure 1, the transmitting terminal signal that need send to two different users is respectively x
1And x
2, the x here
1And x
2What adopt is different transmitting powers, and the signal x that carries out after constellation superposes is: x=x
1+ x
2Behind the signal x after receiving terminal receives stack, each user can come out the data decoding from the signal of stack of oneself.That is to say that two different signals can use different transmitting powers to transmit superposeing to be placed in the identical time, and receiving terminal can come out two signal distinguishings by relevant coding/decoding method.
State in realization in the process of constellation overlapped encoding, the inventor finds that there are the following problems at least in the prior art:
1) existing signal superimposing technique all is that to be applied to transmitting terminal be that single emission website, receiving terminal are the situation of a plurality of connections of a plurality of receiving stations or a receiving station, and the emission information of this moment is by the unified modulation of emission website; And, also do not carry out the scheme that constellation superposes now in the technology accordingly at the situation that has a plurality of emission websites;
2) in the process of carrying out continuous dispatching, generally do not revise the modulation system of continuous dispatching piece in order to save MAP (reflection) message overhead, like this when channel quality takes a turn for the better owing to adopted the modulation system of lower-order will cause waste of radio resources.
Summary of the invention
Embodiments of the invention provide a kind of method and device of supercomposed coding, can realize the constellation overlapped encoding at a plurality of emission websites.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of method of supercomposed coding comprises:
Obtain the emission parameter information of the superimposed signal that the base station need send;
Adjust the emission parameter of the superposed signal of this website according to the emission parameter information of described superimposed signal;
According to adjusted emission parameter described superposed signal is sent, the superimposed signal that described superposed signal and described base station are sent out carries out constellation overlapped encoding.
A kind of supercomposed coding device comprises:
Acquiring unit is used to obtain the emission parameter information of the superimposed signal that the base station need send;
Adjustment unit is used for adjusting according to the emission parameter information of described superimposed signal the emission parameter of the superposed signal of this website;
Transmitting element is used for described superposed signal is sent according to adjusted emission parameter, and the superimposed signal that described superposed signal and described base station are sent out carries out constellation overlapped encoding.
The method of the supercomposed coding that the embodiment of the invention provides and device, adjust by transmitting power and frequency a plurality of emission websites, the signal that makes described a plurality of emission website the send stack of can successfully eating dishes without rice or wine, thus realize existing constellation stack under the situation of a plurality of emission websites.
The embodiment of the invention also provides a kind of method and device of supercomposed coding, can improve utilization ratio of wireless resources.
A kind of method of supercomposed coding comprises:
The signal to noise ratio of the current channel that the base station mobile terminal receive reports;
When the signal to noise ratio of described current channel was higher than default thresholding, stack needed the signal of at least two portable terminals sending in the continuous dispatching piece, and described at least two portable terminals comprise the portable terminal that reports current channel signal to noise ratio to the base station;
Signal after the stack is sent to described at least two portable terminals.
A kind of supercomposed coding device comprises:
Receiving element is used for the signal to noise ratio of the current channel that mobile terminal receive reports;
Superpositing unit, when being used for signal to noise ratio at described current channel and being higher than default thresholding, stack need send to the signal of at least two portable terminals in the continuous dispatching piece, and described at least two portable terminals comprise the portable terminal that reports current channel signal to noise ratio to the base station;
Transmitting element is used for the signal after the stack is sent to described at least two portable terminals.
The method of the supercomposed coding that the embodiment of the invention provides and device, can be in continuous dispatching the signal to noise ratio of channel be higher than the resource that makes full use of the continuous dispatching piece in certain threshold value by the mode of supercomposed coding, improved utilization ratio of wireless resources.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic diagram of constellation overlapped encoding in the prior art;
Fig. 2 is the flow chart of the supercomposed coding method in the embodiment of the invention one;
Fig. 3 is the structural representation of the supercomposed coding device in the embodiment of the invention one;
Fig. 4 is the flow chart of the supercomposed coding method in the embodiment of the invention two;
Fig. 5 is the schematic diagram of the channel set-up mode in the embodiment of the invention two;
Fig. 6 is for carrying out the signaling process figure that power is adjusted in the embodiment of the invention two;
Fig. 7 is for carrying out the signaling process figure that frequency is adjusted in the embodiment of the invention two;
Fig. 8 is the schematic diagram of the constellation stack in the embodiment of the invention three;
Fig. 9 is the flow chart of the supercomposed coding method in the embodiment of the invention three;
Figure 10 is the frame structure schematic diagram of signal in the embodiment of the invention three;
Figure 11 is the structural representation of the supercomposed coding device in the embodiment of the invention four;
Figure 12 is the flow chart of the supercomposed coding method in the embodiment of the invention five;
Figure 13 is the structural representation of the supercomposed coding device in the embodiment of the invention five;
Figure 14 is the signaling process figure of the supercomposed coding method in the embodiment of the invention six;
Figure 15 is the structural representation of the supercomposed coding device in the embodiment of the invention seven.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
In order to realize the constellation overlapped encoding at a plurality of emission websites, embodiments of the invention provide a kind of method and device of supercomposed coding.The method and the device of the supercomposed coding that the embodiment of the invention is provided below in conjunction with accompanying drawing are described in detail.
Embodiment one:
As shown in Figure 2, the method for the supercomposed coding that the embodiment of the invention provides comprises:
201, obtain base station (Base Station, BS) the emission parameter information of the superimposed signal that need send; Wherein, described emission parameter information can be transmission power information, also can be tranmitting frequency information.
202, adjust the emission parameter of the superposed signal of this website according to the emission parameter information of described superimposed signal.
Described emission parameter comprises the transmitting power and the tranmitting frequency of signal; The superimposed signal that superposed signal that this website need send and described base station need send has only carried out after emission parameters such as transmitting power consult in this website and described base station, after soon the emission parameter of the superposed signal of this website will be adjusted according to the emission parameter information of the superimposed signal of described base station, could successfully carry out supercomposed coding.
203, according to adjusted emission parameter described superposed signal is sent, the superimposed signal that described superposed signal and described base station are sent out carries out constellation overlapped encoding.
Particularly, send having finished the superimposed signal that adjusted superposed signal of emission parameter and described base station need send, then described superposed signal and superimposed signal can directly carry out the stack of eating dishes without rice or wine of signal aloft; Preferably, described superposed signal and superimposed signal can be sent at synchronization, this moment, the utilization rate of time-frequency resources to described superimposed signal correspondence was the highest.
Wherein, described superposed signal adopts different transmitting powers with described superimposed signal.
In embodiments of the present invention, the executive agent of above-mentioned steps, a just described website, can be relay station (Relay Station, RS) or the Femto access point (Femto Access Point, FAP).
In order to realize the method for above-mentioned supercomposed coding better, the embodiment of the invention also provides a kind of supercomposed coding device, as shown in Figure 3, comprises acquiring unit 31, adjustment unit 32 and transmitting element 33; Particularly,
Superpositing unit 33 is used for described superposed signal is sent according to adjusted emission parameter, and the superimposed signal that described superposed signal and described base station are sent out carries out constellation overlapped encoding;
Wherein, described superposed signal adopts different transmitting powers with described superimposed signal.
The supercomposed coding device that provides in the embodiment of the invention can be relay station (RS) or Femto access point (FAP), also can be to be integrated in one of them module.
The method of the supercomposed coding that the embodiment of the invention provides and device, adjust by transmitting power and frequency a plurality of emission websites, the signal that makes described a plurality of emission website the send stack of can successfully eating dishes without rice or wine, thus realize existing constellation stack under the situation of a plurality of emission websites.
Embodiment two:
Under some scene, the data of BS and RS (perhaps FAP) need be sent to one or more MS simultaneously, if can carry out supercomposed coding this moment with the data of BS and RS (perhaps FAP), then can save Internet resources greatly, reach more excellent systematic function.
For this reason, the embodiment of the invention provides a kind of method of supercomposed coding, and in embodiments of the present invention, superimposed signal is the signal that BS sends to MS, and superposed signal is the signal that RS (perhaps FAP) sends to MS; As shown in Figure 4, the method for the supercomposed coding that the embodiment of the invention provides may further comprise the steps:
401, the channel to BS and RS (perhaps FAP) is configured.
In embodiments of the present invention, BS need be the reference signal R in the superposed signal of RS (perhaps FAP) transmission when carrying out channel configuration
RSReserve the gap channel, shown in Fig. 5 (a); Equally, RS (perhaps FAP) also needs to be the reference signal R in the superimposed signal of BS transmission when carrying out channel configuration
BSReserve the gap channel, shown in Fig. 5 (b).(D shown in Fig. 5 all represents the data that needs send.)
Like this, the reference signal R of RS (perhaps FAP)
RSThe gap channel of reserving by BS sends, and the reference signal R of BS
BSThe gap channel of reserving by RS (perhaps FAP) sends; Channel configuration after the signal that RS (perhaps FAP) and BS are sent eats dishes without rice or wine to superpose is shown in Fig. 5 (c).
402, RS (perhaps FAP) receives the indication of the transmitting power of the adjustment superposed signal that BS sends, this indication is to be determined according to the signal to noise ratio of mobile terminal reporting by described BS, indicates the transmitting power of the superposed signal of adjusting RS (perhaps FAP) then according to this.
Be superposed to example with the signal that BS and RS are sent, in embodiments of the present invention, the specific implementation process of step 402 comprises the steps: as shown in Figure 6
S21, MS report CINR (Carrier Interfere Noise Rate, carrier-in-interference noise ratio) to BS in real time, and the channel that wherein includes BS is in current signal to noise ratio information;
S22, BS judge the influence of the superposed signal of RS needs transmission to the superimposed signal of BS transmission according to described CINR;
If the signal to noise ratio of carrying among the described CINR is lower, the interference that the superimposed signal that BS then is described is subjected to superposed signal is also bigger, just needs to reduce the transmitting power of the superposed signal of described RS this moment.
S23, BS send the indication of the transmitting power of adjusting superposed signal to RS;
S24, RS adjust the transmitting power of superposed signal according to described indication, and the superimposed signal of as far as possible avoiding superposed signal that described BS is sent to MS produces and disturbs, and perhaps avoids superposed signal that superimposed signal is produced intolerable interference as far as possible; Simultaneously, will guarantee that also MS when resolving to the received signal, can correctly parse the signal of RS, the error rate of the signal of the RS that perhaps parses will be within certain limit.
403, the described superimposed signal that sends of RS (perhaps FAP) mobile terminal receive and the frequency difference of superposed signal, and adjust the tranmitting frequency of the superposed signal of RS (perhaps FAP) according to this frequency difference, to eliminate the frequency difference between described superposed signal and the superimposed signal.
Because the error of local crystal oscillator and the existence of Doppler frequency shift, so the frequency deviation of wireless signal is inevitable, MS with signal transformation to the frequency domain, need carry out compensate of frequency deviation in time domain earlier; In embodiments of the present invention, have two emission website BS and RS, and the frequency deviation of BS-MS and RS-MS is different, therefore need eliminates, at MS the signal after receiving stack is carried out compensate of frequency deviation like this frequency difference between BS and the RS.
Be superposed to example with the signal that BS and RS are sent, in embodiments of the present invention, the specific implementation process of step 403 comprises the steps: as shown in Figure 7
S31, MS measure the frequency deviation of BS and RS in real time;
S32, MS calculate the difference between the frequency deviation of the frequency deviation of BS and RS, the i.e. frequency difference of BS and RS;
S33, MS send to RS with described frequency difference;
S34, RS adjust the tranmitting frequency of superposed signal according to the frequency difference that receives, thereby the frequency deviation of BS and RS is consistent.
Above-mentioned steps 401 to 403 is carried out the process of parameter negotiation for BS and RS, after having passed through parameter negotiation, the superposed signal that superimposed signal that BS sends and RS send can realize substantially between channel equalization and the signal synchronously; Afterwards, the process that superimposed signal and superposed signal are carried out constellation overlapped encoding also just can be carried out smoothly.
404, described superimposed signal and the superposed signal of having finished parameter negotiation are sent, and then finish the constellation overlapped encoding of described superimposed signal and superposed signal.
Particularly, the superposed signal and the superimposed signal that make BS and RS will finish parameter negotiation send, and then described superposed signal and superimposed signal can directly carry out the stack of eating dishes without rice or wine of signal aloft; Preferably, described superposed signal and superimposed signal can be sent at synchronization, this moment, the utilization rate of time-frequency resources to described superimposed signal correspondence was the highest.
Wherein, described superposed signal adopts different transmitting powers with described superimposed signal.
In step 404, if the power magnitude of described superimposed signal and described superposed signal is than being A, then when carrying out described constellation overlapped encoding, the initial phase θ of described superposed signal satisfies:
180°-2*arctanA＜θ＜2*arctanA-90°，θ∈(0°，360°)
Like this, can reduce the influence that superposed signal is resolved the phase place of superimposed signal in the resolving.
Preferably, in the span of above-mentioned θ, choose 0 °, 90 °, 180 ° or 270 ° of initial phases as described superposed signal, the planisphere that is equivalent to this moment to carry out constellation overlapped encoding rotates 45 ° on the basis of existing planisphere, then the initial phase of superposed signal also just changes 45 ° thereupon, be QPSK (Quadrature Phase Shift Keying so in embodiments of the present invention with the modulation system, Quadrature Phase Shift Keying) be example, the initial phase of the superposed signal that RS sends is by general 45 ° now, 135 °, 225 ° or 315 ° have become 0 °, 90 °, 180 ° or 270 °.As shown in Figure 8, changing 0 ° with initial phase into by 45 ° is example, and the x that solid line is represented among the figure is superposed signal x1 when being initial phase with 0 °, carries out the signal after the constellation stack, and this moment, the angle of signal x and y axle was β; The x ' that dotted line is represented among the figure is superposed signal x1 when being initial phase with 45 °, carries out the signal after the constellation stack, and this moment, signal x ' was α with the angle of y axle.By a series of trigonometric function operations, can obtain, at the power of signal x2 during greater than 2.41 times of signal x1, β＞α; Under normal circumstances, the transmitting power of superimposed signal x2 all is much larger than the transmitting power of superposed signal x1, therefore, change the initial phase of superposed signal x1 into 0 ° from 45 ° after, the phase place of carrying out the signal x behind the supercomposed coding obviously becomes big; Like this, when MS carried out signal resolution, superposed signal also can obviously reduce the phase effect of superimposed signal.
In addition, in embodiments of the present invention, can also carry analytically dependent necessary information in the superimposed signal that BS sends with superposed signal, such as the information such as modulating-coding of each time (or crucial running time-frequency resource is determined) in relevant same time period of the superposed signal of sending with RS (perhaps FAP) or the follow-up time section, wherein said crucial time is the Resource Block that is used for information such as other time-frequency piece modulating-codings in overall indication a certain period.Like this, when MS carries out signal resolution, just can be after parsing the superimposed signal of BS, further parse the superposed signal that RS (perhaps FAP) is sent according to the relevant information of the superposed signal of wherein carrying.
Number of steps in the embodiment of the invention also is not used in the execution sequence that limits between each step, and the execution sequence of each step can be adjusted according to actual conditions in specific implementation process.
The method of the supercomposed coding that the embodiment of the invention provides, by parameters such as the transmitting power of a plurality of emission websites and frequency are adjusted, the signal that makes described a plurality of emission website the send stack of can successfully eating dishes without rice or wine, thus realize existing constellation stack under the situation of a plurality of emission websites.
Embodiment three:
In existing cordless communication network, in the zone that some grand networks can't cover, Femto access point (FAP) need be set among a small circle wireless coverage is provided; MS can connect FAP by eating dishes without rice or wine, and then is linked into grand network by FAP.Yet, under current mechanism, and portable terminal (Mobile Station, MS) when entering the FAP overlay area, the but normal perception coverage that enters FAP; If adopted the mode of time-division or frequency division, then need MS periodically to search for lead code (preamble) signal in other period or frequency range.
For this reason, the embodiment of the invention provides a kind of method of supercomposed coding, and the Energy Resources Service that can carry the preamble signal in the signal frame that BS issues utilizes the method for supercomposed coding to send the preamble signal of FAP simultaneously.Particularly, the method for the supercomposed coding that the embodiment of the invention provides as shown in Figure 9, may further comprise the steps:
901, carry out the parameter negotiation of the emission parameters such as transmitting power between BS and the FAP.
The detailed process of carrying out parameter negotiation is identical with the step 401 among the embodiment two to 403 substantially, therefore here just repeats no more.
902, superimposed signal and the superposed signal of having finished parameter negotiation are sent, make it finish constellation overlapped encoding aloft.
Preferably, described superposed signal and superimposed signal can be sent at synchronization, this moment, the utilization rate of time-frequency resources to described superimposed signal correspondence was the highest.
As shown in figure 10, the first half is the frame structure of the superimposed signal that sends of BS among the figure, and the part that its bend indicates is the Resource Block that carries preamble; The latter half is the frame structure of the superposed signal sent of FAP, and the part of carrying the Resource Block of preamble in the signal that utilizes its corresponding BS to send is carried the preamble signal of FAP; Like this, as long as the signal of BS and the signal of FAP are sent, then the preamble signal of the preamble signal of BS and FAP can aloft directly eat dishes without rice or wine to superpose; Wherein, described superposed signal adopts different transmitting powers with described superimposed signal.
In embodiments of the present invention, the initial phase θ of described superposed signal is satisfied equally:
180°-2*arctanA＜θ＜2*arctanA-90°，θ∈(0°，360°)
Here still be that QPSK is an example with the modulation system, the initial phase of the superposed signal that RS sends is provided with employing with mode the same among the embodiment two, just the initial phase of superposed signal has been become 0 °, 90 °, 180 ° or 270 ° by now general 45 °, 135 °, 225 ° or 315 °, thereby superposed signal is to the influence of superimposed signal when reducing signal resolution.
The method of the supercomposed coding that the embodiment of the invention provides, at first parameters such as the transmitting power of BS and FAP and frequency are adjusted, then the preamble signal of FAP is added in the signal of BS, preamble signal common Resource Block with BS, make the preamble signal of the preamble signal of BS and the FAP supercomposed coding of eating dishes without rice or wine, realize existing the constellation stack under the situation of a plurality of emission websites.
Embodiment four:
As shown in figure 11, the embodiment of the invention provides a kind of supercomposed coding device, comprises acquiring unit 111, adjustment unit 112 and transmitting element 113; Particularly,
Acquiring unit 111 gets access to the emission parameter information of the superimposed signal that the base station need send, and described emission parameter information comprises transmission power information and tranmitting frequency information; Adjustment unit 112 is adjusted the emission parameter of the superposed signal of this website according to the emission parameter information of described superimposed signal; Afterwards, transmitting element 113 sends described superposed signal according to adjusted emission parameter, and the superimposed signal that itself and described base station are sent out carries out constellation overlapped encoding;
Wherein, described superposed signal adopts different transmitting powers with described superimposed signal.
In embodiments of the present invention, described acquiring unit 111 can be by receiving the transmission power information of obtaining described superimposed signal from the indication of the transmitting power of the adjustment superposed signal of described base station, and described indication is to be determined according to the signal to noise ratio of mobile terminal reporting by described base station; At this moment, adjustment unit 112 is just adjusted the transmitting power of described superposed signal according to described indication, disturbs to avoid described superposed signal that described superimposed signal is produced; And,
Described acquiring unit 111 can also be by receiving the tranmitting frequency information of obtaining described superimposed signal from the frequency difference of the described superimposed signal of portable terminal and superposed signal, and described frequency difference is to calculate after measuring the tranmitting frequency of described superimposed signal and superposed signal respectively by described portable terminal; At this moment, adjustment unit 112 is adjusted the tranmitting frequency of described superposed signal according to described frequency difference, to eliminate the frequency difference between described superposed signal and the superimposed signal.
The supercomposed coding device that the embodiment of the invention provided can also comprise channel configuration unit 114, this channel configuration unit 114 is used for the gap channel that the reference signal of this website is reserved by described base station is sent, and is the reference signal reservation gap channel of described base station when carrying out channel configuration.
The supercomposed coding device that the embodiment of the invention provided can be relay station (RS) or Femto access point (FAP), also can be to be integrated in one of them module.
The supercomposed coding device that the embodiment of the invention provides, by emission parameters such as the transmitting power of a plurality of emission websites and frequency are adjusted, the signal that makes described a plurality of emission website the send stack of can successfully eating dishes without rice or wine, thus realize existing constellation stack under the situation of a plurality of emission websites.
Embodiment five:
In continuous dispatching, generally do not revise modulation demodulation system in the continuous dispatching piece for the expense of saving dispatch, and portable terminal (MS) can make that in moving process channel quality is in the middle of the continuous variation owing to the occlusion effect of building, therefore when channel quality improves, will cause waste of radio resources owing to the modulation system that has adopted lower-order.The embodiment of the invention then provides a kind of modulation demodulation system that need not to revise the continuous dispatching piece, also can make full use of the method for supercomposed coding of the resource of described continuous dispatching piece.
As shown in figure 12, the method for the supercomposed coding that the embodiment of the invention provides comprises:
1201, the base station channel quality reporting that reports of mobile terminal receive in real time wherein carries the signal to noise ratio of current channel;
1202, when the signal to noise ratio of current channel was higher than default thresholding, stack need send to the signal of at least two portable terminals in the continuous dispatching piece, and described at least two portable terminals comprise the portable terminal that reports current channel signal to noise ratio to the base station.
In the continuous dispatching process, can judge the channel quality of MS real-time report at BS; When the signal to noise ratio of current channel is higher than a default threshold value, the signal that this BS will send to needs at least two portable terminals (comprising the MS of continuous dispatching) carries out constellation overlapped encoding, in the running time-frequency resource with its continuous dispatching piece correspondence that is added to;
Perhaps,
When BS is higher than predetermined threshold value in the signal to noise ratio of judging current channel, send message, wherein carry the running time-frequency resource information of described continuous dispatching piece correspondence to other emission website (such as RS); BS and RS send signal after finishing parameter coordination (process of parameter coordination repeats no more with embodiment two) herein, and it is superposeed in described running time-frequency resource.
1203, the signal after will superposeing sends to described at least two portable terminals.
Behind the signal of described at least two MS after receiving stack, therefrom parse own needed signal according to each self-corresponding demodulation rule.
In order to realize the method for above-mentioned supercomposed coding better, the embodiment of the invention also provides a kind of supercomposed coding device, as shown in figure 13, comprises receiving element 131, superpositing unit 132 and transmitting element 133; Wherein,
Receiving element 131 is used for the signal to noise ratio of the current channel that mobile terminal receive reports;
Transmitting element 133 is used for the signal after the stack is sent to described at least two portable terminals.
The supercomposed coding device that the embodiment of the invention provides can be the base station, also can be the module that is integrated in the base station.
The method of the supercomposed coding that the embodiment of the invention provides and device, can be in continuous dispatching the signal to noise ratio of current channel be higher than the resource that makes full use of the continuous dispatching piece in certain threshold value by the mode of supercomposed coding, improved utilization ratio of wireless resources.
Embodiment six:
The method of the supercomposed coding that the embodiment of the invention is provided with an embodiment is further described below; As shown in figure 14, the method for the supercomposed coding that the embodiment of the invention provides specifically may further comprise the steps:
1401, BS receives the channel quality reporting that continuous dispatching MS reports in real time, carries the signal to noise ratio of current channel in this channel quality reporting.
1402, BS judges according to described channel quality reporting whether the signal to noise ratio of current channel reaches default threshold value, and this threshold value is the signal to noise ratio in the time of can carrying out constellation overlapped encoding to a plurality of signals.
If when the signal to noise ratio of current channel reached described default threshold value, then execution in step 1403; If the signal to noise ratio of current channel is lower than described default threshold value, then execution in step 1404.
1403, the signal that needs is sent to a plurality of MS is superimposed upon in the current continuous dispatching piece and then it is sent, and the signal that wherein sends to a plurality of MS can be to be sent by a base station, also can be to be sent by a plurality of base stations.
If be superimposed with a plurality of signals in the 1404 current continuous dispatching pieces, then stop the operation of above-mentioned supercomposed coding; If only carried the signal of a MS in the current continuous dispatching piece, then need not to carry out any operation.
In some cases, after the step 1403 of the method for the supercomposed coding that the embodiment of the invention provides, can also may further comprise the steps:
1405, timer is set.
1406, when the clock of described timer arrives, stop at the signal that the described needs that superpose in the described continuous dispatching piece send to a plurality of MS.
1407, the MS to continuous dispatching sends message, indicates it to revise modulation demodulation system.
Number of steps in the embodiment of the invention also is not used in the execution sequence that limits between each step, and the execution sequence of each step can be adjusted according to actual conditions in specific implementation process.
The method of the supercomposed coding that the embodiment of the invention provides, can be in continuous dispatching the signal to noise ratio of current channel be higher than the resource that makes full use of the continuous dispatching piece in certain threshold value by the mode of supercomposed coding, improved utilization ratio of wireless resources.
Embodiment seven:
As shown in figure 15, the supercomposed coding device that the embodiment of the invention provides comprises: receiving element 151, superpositing unit 152, transmitting element 153, unit 154 and stop element 155 are set; Particularly,
Receiving element 151 receives the channel quality reporting of mobile terminal reporting, wherein carries the signal to noise ratio of current channel; When the signal to noise ratio of current channel is higher than default thresholding, can superpose in the continuous dispatching piece by superpositing unit 152 and need send to the signal of at least two portable terminals, wherein said at least two portable terminals comprise the portable terminal that reports current channel signal to noise ratio to the base station; Then, the signal after will being superposeed by transmitting element 153 sends to described at least two portable terminals; And when the signal to noise ratio of channel is lower than described default thresholding, then can stop the operation of supercomposed coding by stop element 155.
In addition, in embodiments of the present invention, can also timer be set by unit 154 is set, then when the clock of affiliated timer arrived, stop element 155 will stop at the signal of at least two portable terminals of stack in the described continuous dispatching piece.
The device of the supercomposed coding that the embodiment of the invention provides, can be in continuous dispatching the signal to noise ratio of channel be higher than the resource that makes full use of the continuous dispatching piece in certain threshold value by the mode of supercomposed coding, improved utilization ratio of wireless resources.
By the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential hardware platform, can certainly all implement by hardware.Based on such understanding, all or part of can the embodying that technical scheme of the present invention contributes to background technology with the form of software product, this computer software product can be stored in the storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (16)
1. the method for a supercomposed coding is characterized in that, comprising:
Obtain the emission parameter information of the superimposed signal that the base station need send;
Adjust the emission parameter of the superposed signal of this website according to the emission parameter information of described superimposed signal;
According to adjusted emission parameter described superposed signal is sent, the superimposed signal that described superposed signal and described base station are sent out carries out constellation overlapped encoding.
2. the method for supercomposed coding according to claim 1 is characterized in that, described emission parameter information comprises transmission power information and tranmitting frequency information.
3. the method for supercomposed coding according to claim 2 is characterized in that,
The described transmission power information of obtaining the superimposed signal that the base station need send comprises: receive the indication of the transmitting power of the adjustment superposed signal of sending described base station, described indication is to be determined according to the signal to noise ratio of mobile terminal reporting by described base station; Then,
The described emission parameter of adjusting the superposed signal of this website according to the emission parameter information of described superimposed signal, comprise: according to described indication the transmitting power of described superposed signal is adjusted, disturbed to avoid described superposed signal that described superimposed signal is produced.
4. the method for supercomposed coding according to claim 2 is characterized in that,
The described tranmitting frequency information of obtaining the superimposed signal that the base station need send, comprise: the described superimposed signal that mobile terminal receive sends and the frequency difference of superposed signal, described frequency difference are to calculate after measuring the tranmitting frequency of described superimposed signal and superposed signal respectively by described portable terminal; Then,
The described emission parameter of adjusting the superposed signal of this website according to the emission parameter information of described superimposed signal, comprise: according to described frequency difference the tranmitting frequency of described superposed signal is adjusted, to eliminate the frequency difference between described superposed signal and the superimposed signal.
5. the method for supercomposed coding according to claim 1 is characterized in that, also comprises:
The gap channel that the reference signal of this website is reserved by described base station sends, and is the reference signal reservation gap channel of described base station when this website carries out channel configuration.
6. according to the method for each described supercomposed coding in the claim 1 to 5, it is characterized in that, if the power magnitude of described superimposed signal and described superposed signal is than being A, then
When carrying out described constellation overlapped encoding, the initial phase θ of described superposed signal satisfies:
180°-2*arctanA＜θ＜2*arctanA-90°，θ∈(0°，360°)。
7. a supercomposed coding device is characterized in that, comprising:
Acquiring unit is used to obtain the emission parameter information of the superimposed signal that the base station need send;
Adjustment unit is used for adjusting according to the emission parameter information of described superimposed signal the emission parameter of the superposed signal of this website;
Transmitting element is used for described superposed signal is sent according to adjusted emission parameter, and the superimposed signal that described superposed signal and described base station are sent out carries out constellation overlapped encoding.
8. supercomposed coding device according to claim 7 is characterized in that, the emission parameter information that described acquiring unit gets access to comprises transmission power information and tranmitting frequency information.
9. supercomposed coding device according to claim 8 is characterized in that,
Described acquiring unit is by receiving the transmission power information of obtaining described superimposed signal from the indication of the transmitting power of the adjustment superposed signal of described base station, and described indication is to be determined according to the signal to noise ratio of mobile terminal reporting by described base station; Then,
Described adjustment unit also is used for according to described indication the transmitting power of described superposed signal being adjusted, and disturbs to avoid described superposed signal that described superimposed signal is produced.
10. supercomposed coding device according to claim 8 is characterized in that,
Described acquiring unit is by receiving the tranmitting frequency information of obtaining described superimposed signal from the frequency difference of the described superimposed signal of portable terminal and superposed signal, and described frequency difference is to calculate after measuring the tranmitting frequency of described superimposed signal and superposed signal respectively by described portable terminal; Then,
Described adjustment unit also is used for according to described frequency difference the tranmitting frequency of described superposed signal being adjusted, to eliminate the frequency difference between described superposed signal and the superimposed signal.
11. supercomposed coding device according to claim 7 is characterized in that, also comprises:
The channel configuration unit is used for the gap channel that the reference signal of this website is reserved by described base station is sent, and is the reference signal reservation gap channel of described base station when this website carries out channel configuration.
12. the method for a supercomposed coding is characterized in that, comprising:
The signal to noise ratio of the current channel that the base station mobile terminal receive reports;
When the signal to noise ratio of described current channel was higher than default thresholding, stack need send to the signal of at least two portable terminals in the continuous dispatching piece, and described at least two portable terminals comprise the portable terminal that reports current channel signal to noise ratio to the base station;
Signal after the stack is sent to described at least two portable terminals.
13. the method for supercomposed coding according to claim 12 is characterized in that, the described stack in the continuous dispatching piece need send to the signal of at least two portable terminals, comprising:
This base station that superposes in the running time-frequency resource of described continuous dispatching piece correspondence, described base station need send to the signal of at least two portable terminals; Perhaps,
Described base station sends message to relay station, wherein carries the running time-frequency resource information of described continuous dispatching piece correspondence, and the signal that described base station and relay station are sent superposes in described running time-frequency resource.
14. the method for supercomposed coding according to claim 12 is characterized in that, also comprises:
Timer is set;
When the clock of described timer arrives, stop at the signal of at least two portable terminals of stack in the described continuous dispatching piece.
15. a supercomposed coding device is characterized in that, comprising:
Receiving element is used for the signal to noise ratio of the current channel that mobile terminal receive reports;
Superpositing unit, when being used for signal to noise ratio at described current channel and being higher than default thresholding, stack need send to the signal of at least two portable terminals in the continuous dispatching piece, and described at least two portable terminals comprise the portable terminal that reports current channel signal to noise ratio to the base station;
Transmitting element is used for the signal after the stack is sent to described at least two portable terminals.
16. supercomposed coding device according to claim 15 is characterized in that, also comprises:
The unit is set, is used to be provided with timer;
Stop element is used for stopping at the signal of at least two portable terminals of stack in the described continuous dispatching piece when the clock of described timer arrives.
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