CN104092525A - Multi-carrier data transmission method and device and interference elimination method and device - Google Patents

Abstract

The embodiment of the invention provides a multi-carrier data transmission method, an interference elimination method, a multi-carrier data transmission device and an interference elimination device. The multi-carrier data transmission method includes the steps that desired signals are sent to user equipment of a first base station through first-type sub-carriers, and the interference signals which show that the first base station interferes with user equipment of a second base station are sent to the user equipment of the first base station and the user equipment of the second base station through second-type sub-carriers. According to the multi-carrier data transmission method, the interference elimination method, the multi-carrier data transmission device and the interference elimination device, the interference signals can be sent through the second-type sub-carriers, the interference signals can be received by the user equipment of the second base station, and then the interference signals are eliminated. The interference signals also can be received by the user equipment of the first base station and used for decoding the desired signals, and then interference elimination in a mixed interference scene in a heterogeneous network can be achieved.

Description

Multi-carrier data transmission method, interference elimination method and device thereof

Technical field

The application relates to heterogeneous network technologies field, relates in particular to a kind of multi-carrier data transmission method, interference elimination method and multi-carrier data transmission device and interference blanking unit.

Background technology

Along with the develop rapidly of mobile communication technology, the various mobile interconnect services of High Data Rate support that need are just flourish.But in recent years, the area coverage of cellular cell is more and more less, and because user distribution is inhomogeneous, the cell splitting technology of traditional spatial content that can improve cellular network cannot practical requirement.

Heterogeneous network (Heterogeneous Network, HetNet) as a kind of novel cell deployment scheme, specifically refer to the inner various lower powered small base stations of arrangement of macrocell (micro-base station) that cover at macro base station (Macro-BS), comprise: femto base station (Pico-BS), Home eNodeB (Femto BS) and relaying (Relay) etc., wherein, macro base station is responsible for basis and is covered and the user of high-speed mobile, and the Large Volume Data business of the hot zones that user concentrates is relatively responsible in various micro-base station.

Under this novel isomerism network structure, it is particularly complicated that interference problem can become.Presence of intercell interference not only comprises the interference between isomorphism community, has also comprised the interference between isomery community.Because the transmitting power between different layers base station differs greatly, the interference between the different layers community often interference between Bi Tongceng community is also serious, thereby can have a strong impact on the throughput of system.

Summary of the invention

The application's object is to provide multi-carrier data transmission scheme and interference cancellation scheme in a kind of heterogeneous network.

According to the application's first aspect, a kind of multi-carrier data transmission method is provided, described method comprises:

Use first kind subcarrier to send desired signal to the subscriber equipment of the first base station; And

Use Second Type subcarrier to send the first base station the subscriber equipment of described the second base station is caused the interference signal of interference to the subscriber equipment of described the first base station and the subscriber equipment of the second base station.

According to the application's second aspect, a kind of multi-carrier data transmission method is provided, described method comprises:

Determine available subcarrier;

Determine described subcarrier type;

Wherein, described subcarrier is divided into first kind subcarrier and Second Type subcarrier, transmits the desired signal that the first base station sends to the first base station user on described first kind subcarrier; Described Second Type subcarrier is uploaded the interference signal that transfers to the first base station that the subscriber equipment of described the first base station and the subscriber equipment of the second base station send the subscriber equipment of described the second base station is caused interference.

According to the application's the third aspect, a kind of interference elimination method is provided, described method comprises:

Be received in the first signal transmitting on first kind subcarrier and the secondary signal of transmitting on Second Type subcarrier;

According to the secondary signal of transmitting on the Second Type subcarrier receiving, the first signal transmitting on the first kind subcarrier receiving is disturbed to elimination.

According to the application's fourth aspect, a kind of multi-carrier data transmission device is provided, described device comprises:

One first sending module, for using first kind subcarrier to send desired signal to the subscriber equipment of the first base station; And

One second sending module, for using Second Type subcarrier to send the first base station the subscriber equipment of described the second base station is caused the interference signal of interference to the subscriber equipment of described the first base station and the subscriber equipment of the second base station.

According to the application's the 5th aspect, a kind of multi-carrier data transmission device is provided, described device comprises:

One the 5th determination module, for determining available subcarrier;

One the 6th determination module, for determining described subcarrier type;

Wherein, described subcarrier is divided into first kind subcarrier and Second Type subcarrier, transmits the desired signal that the first base station sends to the first base station user on described first kind subcarrier; Described Second Type subcarrier is uploaded the interference signal that transfers to the first base station that the subscriber equipment of described the first base station and the subscriber equipment of the second base station send the subscriber equipment of described the second base station is caused interference.

According to the application's the 6th aspect, a kind of interference blanking unit is provided, described device comprises:

One receiver module, for being received in the first signal transmitting on first kind subcarrier and the secondary signal of transmitting on Second Type subcarrier;

One first interference cancellation module, for according to the secondary signal of transmitting on the Second Type subcarrier receiving, disturbs elimination to the first signal transmitting on the first kind subcarrier receiving.

The method of the embodiment of the present application and device can send interference signal by Second Type subcarrier, and interference signal can be received by the subscriber equipment of the second base station, and for eliminating interference signal; Interference signal also can be received by the subscriber equipment of the first base station, for the desired signal of decoding, and then realizes the interference mixing under interference scene in heterogeneous network and eliminates.

Brief description of the drawings

Fig. 1 mixes under heterogeneous network to disturb scene schematic diagram;

Fig. 2 (a) is a kind of QPSK modulation constellation of power;

Fig. 2 (b) is the QPSK modulation constellation of another kind of power;

The QPSK signal of Fig. 2 (a) and these two kinds of different capacities of Fig. 2 (b) is carried out the hierarchical modulation new signal constellation (in digital modulation) figure obtaining that superposes by Fig. 2 (c);

Fig. 3 is the multi-carrier data transmission method flow chart of the application's the first embodiment;

Fig. 4 (a) is category-B subcarrier higher slice transmission schematic diagram;

Fig. 4 (b) is C class subcarrier higher slice transmission schematic diagram;

Fig. 5 is the multi-carrier data transmission method flow chart of the application's the second embodiment;

Fig. 6 is the interference elimination method flow chart of the application's the first embodiment;

Fig. 7 is the interference elimination method flow chart of the application's the second embodiment;

Fig. 8 is multi-carrier data transmission device the first structured flowchart of the application's the first embodiment;

Fig. 9 is multi-carrier data transmission device the second structured flowchart of the application's the first embodiment;

Figure 10 is the first structured flowchart of the first determination module in the multi-carrier data transmission device of the application's the first embodiment;

Figure 11 is the second structured flowchart of the first determination module in the multi-carrier data transmission device of the application's the first embodiment;

Figure 12 is the third structured flowchart of multi-carrier data transmission device of the application's the first embodiment;

Figure 13 is the 4th kind of structured flowchart of multi-carrier data transmission device of the application's the first embodiment;

Figure 14 is the first structured flowchart of the first sending module in the multi-carrier data transmission device of the application's the first embodiment;

Figure 15 is the first structured flowchart of the second sending module in the multi-carrier data transmission device of the application's the first embodiment;

Figure 16 is the 5th kind of structured flowchart of multi-carrier data transmission device of the application's the first embodiment;

Figure 17 is the third structured flowchart of the first determination module in the multi-carrier data transmission device of the application's the first embodiment;

Figure 18 is the 6th kind of structured flowchart of multi-carrier data transmission device of the application's the first embodiment;

Figure 19 is the 7th kind of structured flowchart of multi-carrier data transmission device of the application's the first embodiment;

Figure 20 is multi-carrier data transmission device the first structured flowchart of the application's the second embodiment;

Figure 21 is the first structured flowchart of the 6th determination module in the multi-carrier data transmission device of the application's the second embodiment;

Figure 22 is the second structured flowchart of the 6th determination module in the multi-carrier data transmission device of the application's the second embodiment;

Figure 23 is multi-carrier data transmission device the second structured flowchart of the application's the second embodiment;

Figure 24 is the third structured flowchart of multi-carrier data transmission device of the application's the second embodiment;

Figure 25 is the third structured flowchart of the 6th determination module in the multi-carrier data transmission device of the application's the second embodiment;

Figure 26 is the 4th kind of structured flowchart of multi-carrier data transmission device of the application's the second embodiment;

Figure 27 is the 5th kind of structured flowchart of multi-carrier data transmission device of the application's the second embodiment;

Figure 28 is interference blanking unit the first structured flowchart of the application's the first embodiment;

Figure 29 is interference blanking unit the second structured flowchart of the application's the first embodiment;

Figure 30 is the structured flowchart of the first interference cancellation module in the interference blanking unit of the application's the first embodiment;

Figure 31 is interference blanking unit the first structured flowchart of the application's the second embodiment;

Figure 32 is interference blanking unit the second structured flowchart of the application's the second embodiment;

Figure 33 is the structured flowchart of the second interference cancellation module in the interference blanking unit of the application's the second embodiment;

Figure 34 is the 8th kind of structured flowchart of multi-carrier data transmission device of the application's the first embodiment;

Figure 35 is the 6th kind of structured flowchart of multi-carrier data transmission device of the application's the second embodiment;

Figure 36 is another structured flowchart of interference blanking unit of the embodiment of the present application.

Embodiment

Below in conjunction with accompanying drawing (in some accompanying drawings, identical label represents identical element) and embodiment, the application's embodiment is described in further detail.Following examples are used for illustrating the application, but are not used for limiting the application's scope.

Interference scene comparatively general in heterogeneous network is disturbed scene for mixing, as shown in Figure 1: the subscriber equipment to micro-base station is produced strong jamming by the downlink data signal that macro base station sends to the subscriber equipment of macro base station, meanwhile, the subscriber equipment to macro base station is produced weak jamming by the downlink data signal that the subscriber equipment of Xiang Wei base station, micro-base station sends.Due to various multipath fadings, no matter how, all having, micro-base station and micro-user's position necessarily may there is such scene.But, due to large scale decline, when micro-base station approaches macro base station, more likely there is this interference scene.Present techniques scheme disturbs scene to propose for this general mixing.In the each embodiment of the application, shown in Fig. 1, mix the subscriber equipment of a pair of macro base station and the subscriber equipment of micro-base station that disturb in scene and be called associated subscriber equipment.

It will be understood by those skilled in the art that the term such as " first ", " second " in the application, only for distinguishing different step, equipment or module etc., neither represents any particular technology implication, also do not represent the inevitable logical order between them.In addition,, in order better to understand the application's technical scheme, now the term occurring in the technical program is done to following explanation:

" base station " broadly refers to the random node of the network terminal of communicating by letter with end user device (UE), such as Node B, eNode B, base station, AP (access point) etc." the first base station " and " the second base station " can refer to respectively the opposing party's subscriber equipment to cause strongly disturbing base station, and the opposing party's subscriber equipment caused to the base station of weak jamming, and can be respectively macro base station and micro-base station, or micro-base station and macro base station.Micro-base station comprises with lower one or more: Pico base station, Femto base station, Relay base station, remote radio (RRH) base station etc.Macro base station is broadly relative saying with micro-base station, is also that macro base station is the base station that coverage is greater than any appropriate of micro-base station.Between each base station, use multicarrier system and communications of user equipment.

Under multicarrier heterogeneous network interference channel, due to the characteristic of frequency-selective channel, different subcarriers suffers multipath fading in various degree, causes different carrier in different interference scenes.In order to make full use of carrier resource, each subcarrier is divided into three types by the each embodiment of the application:

First kind subcarrier (calling category-B subcarrier in the following text), the first base station is used such other subcarrier to send desired signal to the subscriber equipment of the first base station, and use hierarchical modulation coded system desired signal to be carried out to the individual-layer data signal obtaining after modulating-coding, wherein, the lower layer signal of described individual-layer data signal is that strongly disturbing interference signal will be caused to the subscriber equipment of the second base station in the first base station.

Second Type subcarrier (calling C class subcarrier in the following text), the first base station is used such other subcarrier to send interference signal to the subscriber equipment of the first base station and the subscriber equipment of the second base station, and interference signal is also carried out modulating-coding by hierarchical modulation coded system, be respectively used to the subscriber equipment of the first base station and the subscriber equipment of the second base station disturbs elimination.

Other subcarriers (calling category-A subcarrier in the following text), when the first base station and the second base station are used such other subcarrier to send data, do not take the cooperation of intercarrier, only use the data to sending to carry out sending after traditional modulating-coding.

" hierarchical modulation coding " mode refers to and the modulation signal of different capacity is superimposed as to a new signal on amplitude territory, this new signal can be called to individual-layer data signal.Individual-layer data signal is being separated timing by power levels successively demodulation from high to low, and signal is between layers separate, does not interfere with each other.For example, Fig. 2 (a) and Fig. 2 (b) are QPSK (Quadrature Phase Shift Keying, the Quadrature Phase Shift Keying) modulation constellation of two different capacities.The QPSK signal stack of these two kinds of different capacities has been obtained to the new signal constellation (in digital modulation) figure as shown in Fig. 2 (c), that is, and the new signal constellation (in digital modulation) figure that " x " in Fig. 2 (c) forms.Signal as shown in Fig. 2 (c) first solves the signal of " o " place constellation point, i.e. high-power signal x at solution timing ₁, then according to x ₃-x ₁result demodulate low-power level signal x ₂.In addition, in hierarchical modulation coded system, the modulation system of every layer can be different, for example, use QPSK and 8PSK, or QPSK superposes and all can realize with 16QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation).

The method of the each embodiment of the application can run on respectively the first base station, the second base station or be independent of the device of each base station.

The multi-carrier data transmission method of the application's the first embodiment can run on the first base station or be independent of the device of each base station, and as shown in Figure 3, the multi-carrier data transmission method of the application's the first embodiment comprises:

S310. use first kind subcarrier to send desired signal to the subscriber equipment of the first base station.

According to the characteristic of described first kind subcarrier, the desired signal that use first kind subcarrier sends to the subscriber equipment of the first base station is for modulating through hierarchical coding the first layer data-signal obtaining, and the lower floor of first layer data-signal is that strongly disturbing interference signal will be caused to the subscriber equipment of the second base station in the first base station.

S320. use Second Type subcarrier to send the first base station the subscriber equipment of described the second base station is caused the interference signal of interference to the subscriber equipment of described the first base station and the subscriber equipment of the second base station.

First kind subcarrier is in order to make the subscriber equipment of the first base station and the subscriber equipment of the second base station all can receive the information that Second Type subcarrier sends, preferably by the above-mentioned interference signal of transmission of broadcast, in the method for the present embodiment, " broadcast " is for to make the subscriber equipment of the first base station and the subscriber equipment of the second base station can receive the any-mode of interference signal, and the second base station does not send downstream signal on Second Type subcarrier, to avoid interference the reception of the second user base station to interference signal.

Although do not transmit new information on Second Type subcarrier,, by the noiseless transmission of signal on auxiliary first kind subcarrier, Second Type subcarrier has improved network throughput.

In the method for the application's the first embodiment, send interference signal by Second Type subcarrier, interference signal can be received by the subscriber equipment of the second base station, and for eliminating interference signal; Interference signal also can be received by the subscriber equipment of the first base station, for the desired signal of decoding, and then realizes the interference mixing under interference scene in heterogeneous network and eliminates.

In addition,, in order to realize the method for the present embodiment, the method should comprise before step S310 and S320:

S330. determine subcarrier type.

In the method for the present embodiment, step S330 can comprise:

S331. receive described subcarrier type, also from carrying out definite subcarrier type of base station outside the method for the embodiment of the present application or device.Or,

Step S330 can comprise:

The signal to noise ratio snr of the downstream signal S332. receiving on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station and dry making an uproar than INR, determine described subcarrier type.Also, determine subcarrier type by the first base station or the self-contained unit of the method for carrying out the present embodiment.Wherein:

Signal to noise ratio (SNR) and dry the making an uproar of the downstream signal that receiving terminal j receives on m subcarrier are respectively than (INR):

${\mathrm{SNR}}_i^m={\left|h_{\mathrm{ii}}^m\right|}^2{P_i}^m/N_0---\left(1\right)$

${\mathrm{INR}}_i^m={\left|h_{\mathrm{ij}}^m\right|}^2{P_j}^m/N_0---\left(2\right)$

for the transmitting power of transmitting terminal i (i=1,2), for the transmitting power of transmitting terminal j (j=1,2), for the channel gain from transmitting terminal i to receiving terminal i, for the channel gain from transmitting terminal i to receiving terminal j.

Particularly, determine that the mode of subcarrier type all can be as follows:

Due to the variability of multipath fading, regardless of the position of the second base station and subscriber equipment thereof, all there is certain may occurring to mix and disturb scene.But, due to large scale decline, when the second base station approaches the first base station, more easily there is mixing the scene of disturbing.The satisfied condition of category-B subcarrier is also the condition of disturbing scene to occur of mixing in heterogeneous network.Also, definite subcarrier that meets following formula is category-B subcarrier:

${\mathrm{INR}}_n^m\≥{\mathrm{SNR}}_2^m---\left(3\right)$

${\log }_2(1+{\mathrm{INR}}_1^m)\≤{\log }_2(1+{\mathrm{SNR}}_1^m)-{\log }_2\left(\frac{1+{\mathrm{INR}}_2^m}{1+{\mathrm{SNR}}_2^m}\right)---\left(4\right)$

C class subcarrier can not directly provide transfer of data support to subscriber equipment.But, by C class subcarrier, subscriber equipment can receive the interference signal on category-B subcarrier, thereby makes category-B subcarrier realize noiseless transmission, and the data transfer rate that C class subcarrier provides all transforms in order to can be used for the data transfer rate of the subscriber equipment of service expectation on category-B subcarrier.If system is not used subcarrier cooperation, C class subcarrier also can transmit by the link that direct transfers so, so, in definite C class subcarrier, in order to ensure the lifting of data transfer rate, the performance boost that must make C class subcarrier bring is greater than the data transfer rate that adopts conventional transportation method to reach.On C class subcarrier, the two paths of data rate of transmitting by Tx1 cross link is greater than the data transfer rate that adopts conventional transmission mode.So should determine that the subcarrier that meets following formula is C class subcarrier:

${\mathrm{INR}}_2^m\≥{\mathrm{SNR}}_2^m---\left(3\right)$

${\mathrm{INR}}_2^m\≥{\mathrm{SNR}}_1^m---\left(5\right)$

Meeting above-mentioned formula (3) can make the maximum data rate that C class subcarrier transmits be not less than the data transfer rate upper bound (completely non-interference) of such subcarrier as category-A subcarrier.Also, such subcarrier is greater than as category-A subcarrier as the transmittability of C class subcarrier.And meet formula (5) and ensured the channel gain of C class subcarrier be better than the channel gain of category-B subcarrier thereby make to receive more information from the first base station compared with the subscriber equipment of the second base station and the subscriber equipment of the first base station, thereby prevent the wasting of resources.

Subcarrier except B, C two class subcarriers is category-A subcarrier.

In order to determine subcarrier type, the method for the present embodiment also comprises:

S340. obtain described signal to noise ratio snr and dry making an uproar compared INR.

Can be by obtaining described signal to noise ratio snr and dry making an uproar than INR with each base station communication, or by directly obtaining corresponding signal to noise ratio snr with each communications of user equipment and dry making an uproar compared INR.

Taking the transfer of data on the m subcarrier shown in Fig. 4 (a)-Fig. 4 (b) as example, the transmission mechanism on all kinds of subcarriers in the method for the present embodiment is described.

In Fig. 4 (a)-Fig. 4 (b), Tx1 is the first base station, and Rx1 is the subscriber equipment of the first base station, and Tx2 is the second base station, and Rx2 is the subscriber equipment of the second base station.Rx1 is a pair of associated subscriber equipment with Rx2, that is, Tx1 sends descending desired signal through the link (shown in solid arrow) that direct transfers to Rx1; The downstream signal of Tx1 is received by Rx2 through cross link (shown in dotted arrow), and Rx2 is caused to strong jamming; Tx2 sends descending desired signal through the link (shown in solid arrow) that direct transfers to Rx2; The downstream signal of Tx2 is received by Rx1 through cross link (shown in dotted arrow), and Rx1 is caused to strong jamming.In Fig. 4 (a), at transmitting terminal, post bar height represents the data transfer rate of transmitting terminal receiving terminal has two post bars, left side post bar represents the desired signal of transmitting terminal transmitting, right side post bar represents the signal that may cause interference from cross link, desired signal has represented its relation in amplitude space, i.e. power levels relation with the relative position relation of the signal that may cause interference.On subscriber equipment i from base station j, (the interference signal post bar of i ≠ j), its represented value in top and bottom is respectively with for subscriber equipment i, its disturbed signal is the lap of two post bars, and also, shown in Fig. 4 (a), what the desired signal of Rx2 was caused to interference is the signal from the L2 layer of the signal of Tx1; What the desired signal of Rx1 was caused to interference is the part corresponding with L21 layer in Fig. 4 (a) from Tx2.The value of the top and bottom of two post bars can be determined the line of demarcation shown in straight dashed line after determining, and then determines each layer height, in the method for the embodiment of the present application, in hierarchical modulation, distributes the power levels of each layer.In other words, the signal to noise ratio snr of the downstream signal receiving on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station and dry making an uproar than INR, can determine the power levels of lap.Correspondingly, the method for the present embodiment also comprises:

The noise of the downstream signal S350. receiving on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station is the dry ratio of making an uproar when, determines described the first power levels and described the second power levels.

According to determined each power levels, step S310 can further comprise:

S311. use hierarchical modulation coded system to carry out modulating-coding to described desired signal, obtain first layer data-signal.

Wherein, described first layer data-signal is divided into ground floor signal and second layer signal from top to bottom according to the first power levels.Described the first power levels is interference is caused in described the first base station power levels to the subscriber equipment of described the second base station.Described second layer signal is divided into the 3rd layer signal and the 4th layer signal from top to bottom according to the second power levels.Described the second power levels is interference is caused in described the second base station power levels to the subscriber equipment of described the first base station.Described second layer signal is described interference signal, the signal of the L2 layer as shown in Fig. 4 (a), the subscriber equipment that described the 4th layer signal is the first base station will be subject to the disturbed signal of described the second base station interference, the signal of the L21 layer as shown in Fig. 4 (a).

Use category-B subcarrier to send this first layer data-signal to the subscriber equipment of the first base station by the first base station.

Step S320 can further comprise:

S321. use hierarchical modulation coded system to carry out modulating-coding to described interference signal, obtain the second individual-layer data signal.

Described interference signal is the signal of the L2 layer shown in Fig. 4 (a), can utilize the signal transmitting on C class subcarrier to disturb elimination in order to realize the subscriber equipment of each base station, in step S320, further this layer signal is carried out to layering, make described the second individual-layer data signal comprise from top to bottom described the 4th layer signal and described the 3rd layer signal, shown in Fig. 4 (b), be L21 ' and L22 ', the 4th layer signal corresponding to L21 ' layer is the L21 layer in Fig. 4 (a), and the 3rd layer signal corresponding to L22 ' layer is the L22 layer shown in Fig. 4 (a).On the power levels basis of each layer signal that the power levels of the each layer signal in other words, transmitting on C class subcarrier is transmitted on category-B subcarrier, put upside down.This is because for Rx1, only need the signal decoding desired signal of L21 layer; And for Rx2, need the signal (being also whole L2 layer) of L21 and L22 layer to disturb elimination.In addition the channel gain of C class subcarrier, be better than the channel gain of category-B type subcarrier therefore, cross link has larger capacity than the link that direct transfers.L21 ' layer is set and there is higher power levels than L22 ' layer, the Rx2 L2 layer of can decoding, and the Rx1 L21 ' layer of only can decoding.Rx1 unwanted signal is placed on to lower floor and can makes that resource is as much as possible to be utilized, also, the method for the present embodiment has improved the efficiency of transmission of C class subcarrier.

Use C class subcarrier to send this second individual-layer data signal to the subscriber equipment of the first base station by the first base station.

In addition, for the method for modulating-coding strategy (MCS) the present embodiment of determining every layer also comprises:

S360. according to when dry making an uproar than the data transfer rate of determining in described first layer data-signal and described the second individual-layer data signal each layer of described noise.

Still be depicted as example with Fig. 4 (a) and Fig. 4 (b), can determine according to following formula the data transfer rate of each layer:

$r_{L1}^m=\min \{{\log }_2(1+{\mathrm{SNR}}_1^m),{\log }_2\left(\frac{1+{\mathrm{INR}}_2^m}{1+{\mathrm{SNR}}_2^m}\right)\}---\left(6\right)$

$r_{L2}^m={\log }_2(1+{\mathrm{SNR}}_1^m)-r_{L1}^m---\left(7\right)$

$r_{L21}^m={\log }_2(1+{\mathrm{INR}}_1^m)---\left(8\right)$

$r_{L22}^m=r_{L2}^m{-}_{L21}^m---\left(9\right)$

$r_{{L21}^{\′}}^m=r_{C1}^m={\log }_2(1+{\mathrm{SNR}}_1^m)---\left(10\right)$

$r_{{L21}^{\′}}^m+r_{{L22}^{\′}}^m=r_{C2}^m={\log }_2(1+{\mathrm{INR}}_2^m)---\left(11\right)$

S370. determine the MCS of each layer according to the data transfer rate of described each layer.Determine according to the data transfer rate of each layer the mature technology that the MCS of applicable each layer of selection is this area, therefore not to repeat here.

In addition, due to frequency selective fading, the signal to noise ratio on each subcarrier and dry making an uproar than being variable.In order to obtain higher network throughput, determine need to consider when subcarrier type on all types of subcarriers and data transfer rate, be also that step S330 can comprise:

S331. determine described subcarrier type according to described signal to noise ratio, the described dry when described data transfer rate of making an uproar.In a kind of possible implementation, in order to make C class subcarrier can provide category-B subcarrier to be similar to the needed full detail of noiseless transmission, meanwhile, just ensure that C class subcarrier do not waste, while determining C class carrier wave, also need to meet the following conditions:

$\underset{m\∈C}{\mathrm{\Σ}}{r}_{C1}^m\≥\underset{m\∈B}{\mathrm{\Σ}}{r}_{L21}^m---\left(12\right)$

$\underset{m\∈C}{\mathrm{\Σ}}{r}_{C2}^m\≥\underset{m\∈B}{\mathrm{\Σ}}{r}_{L2}^m---\left(13\right)$

To sum up, in a kind of possible implementation, the device of method of carrying out the present embodiment determines that the process of subcarrier type and the first base station determine that in step S332 the process of subcarrier type is as follows:

S3321. the whole subcarriers that meet formula (3) and (4) are defined as to category-B subcarrier; The whole subcarriers that meet formula (3) and (5) are defined as C class subcarrier; All the other subcarriers are category-A subcarrier.

If S3322. meet formula (12) and (13), execution step S3323, otherwise, execution step S3324.

S3323. determine the subcarrier in C class subcarrier for category-A subcarrier, and recalculate with if meet formula (12) and (13), repeated execution of steps S1322, otherwise, finish.

S3324. determine the subcarrier in category-B subcarrier for category-A subcarrier, and recalculate with .If do not meet formula (12) and (13), repeated execution of steps S3324, otherwise, finish.

Wherein, what arg max g (t) expressed is a subset of the domain of definition, and in this subset, arbitrary element all can make function g (t) get maximum; What arg mix g (t) expressed is a subset of the domain of definition, and in this subset, arbitrary element all can make function g (t) get minimum value.

If the method for the present embodiment is carried out by the device that is independent of each base station, the method for the present embodiment also comprises:

S380. to described the first base station and described the second base station sends subcarrier type and on described subcarrier the MCS of transmitted signal, to be notified type and the MCS of a subscriber equipment subcarrier separately by each base station.

No matter the method for the present embodiment is carried out by the first base station or the device that is independent of each base station is carried out, in order to make receiving terminal can recover desired signal and to disturb elimination according to the method for the present embodiment, the method for the present embodiment also comprises:

S390. send the type of subcarrier and the MCS of transmitted signal on described subcarrier to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station.

It should be noted that, in addition, in order to make the interference signal that transmits on C class subcarrier the first base station can be not disturbed, and the subscriber equipment of the first base station can recover desired signal, and the method for the present embodiment also comprises:

S3100. control described the second base station and transmit desired signal to described the second base station user on described first kind subcarrier, on described Second Type subcarrier, do not transmit any data-signal.

To sum up, the method for the embodiment of the present application is selected a part of subcarrier and is specifically designed to auxiliary interference and eliminates, and in this section on subcarrier, the data that directly transmission system needs, help other carrier wave and carry out interference delete but retransmit a part of data.Meanwhile, in order to ensure the lifting of systematic function, the transmission means on subcarrier has been carried out special design, can make full use of channel condition, makes the performance gain of system more obvious.

The application also provides a kind of multi-carrier data transmission method of being carried out or being carried out by the second base station by the device that is independent of each base station, and as shown in Figure 5, the multi-carrier data transmission method of the application's the second embodiment comprises:

S510. determine available subcarrier.In the method for the present embodiment, mainly refer to the subcarrier that can use of the second base station, the subcarrier that the second base station can be used is conventionally by the first base station assigns, therefore, can be from the first base station or the second base station determine available subcarrier.

S520. determine described subcarrier type.

Wherein, described subcarrier is divided into first kind subcarrier and Second Type subcarrier, transmits the desired signal that the first base station sends to the first base station user on described first kind subcarrier; Described Second Type subcarrier is uploaded the interference signal that transfers to the first base station that the subscriber equipment of described the first base station and the subscriber equipment of the second base station send the subscriber equipment of described the second base station is caused interference.And the characteristic of all types of subcarriers is as described in the method for the first embodiment.

In the method for the application's the second embodiment, mix the interference of disturbing under scene and eliminate by subcarrier type being divided to the transmission that is used in signal with different type, can assist to realize in heterogeneous network.

Subcarrier type can be determined by the first base station, the second base station, also can be determined by the device that is independent of each base station, and when the device outside the method by execution the present embodiment is determined, step S520 can comprise:

S521. obtain definite subcarrier type.

Subcarrier type in step S520 also can be definite by the device of the method for execution the present embodiment itself, and correspondingly, step S520 can comprise:

The noise of the downstream signal S522. receiving on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station is the dry ratio of making an uproar when, determines described subcarrier type.Particularly, can determine described subcarrier type with reference to the description of the above-mentioned method about the first embodiment.

In order to determine described subcarrier type, the method for the present embodiment also comprises:

S530. obtain the when dry ratio of making an uproar of described noise.

Can be by obtaining described signal to noise ratio snr and dry making an uproar than INR with each base station communication, or by directly obtaining corresponding signal to noise ratio snr with each communications of user equipment and dry making an uproar compared INR.

As described in the method about the first embodiment, the desired signal transmitting on described first kind subcarrier is the first layer data-signal through hierarchical modulation coding; The interference signal of transmitting on described Second Type subcarrier is the second individual-layer data signal through hierarchical modulation coding.Correspondingly, the method for the present embodiment also comprises:

S540. according to the when dry ratio of making an uproar of described noise, determine in described first layer data-signal and described the second individual-layer data signal the data transfer rate of each layer.The data transfer rate of each layer is as described about step S360 in the first embodiment.

S550. determine the MCS of each layer according to the data transfer rate of described each layer.Determine according to the data transfer rate of each layer the mature technology that the MCS of applicable each layer of selection is this area, therefore not to repeat here.

Due to frequency selective fading, the signal to noise ratio on each subcarrier and dry making an uproar than being variable.In order to obtain higher network throughput, determine need to consider when subcarrier type on all types of subcarriers and data transfer rate, be also that in the method for the present embodiment, step S520 can comprise:

S523. determine described subcarrier type according to described signal to noise ratio, the described dry when described data transfer rate of making an uproar, concrete as described about step S331 in the method for the first embodiment.

If the method for the present embodiment is carried out by the device that is independent of each base station, the method also comprises:

S560. to described the first base station and described the second base station sends the type of described subcarrier and on described subcarrier the MCS of transmitted signal, to make each base station to send data-signal according to the type of subcarrier.

No matter the method for the present embodiment is carried out by the second base station or the device that is independent of each base station is carried out, in order to make receiving terminal can recover desired signal and to disturb elimination according to the method for the present embodiment, the method for the present embodiment also comprises:

S570. send the type of subcarrier and the MCS of transmitted signal on described subcarrier to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station.

In addition, in order to make the interference signal that transmits on C class subcarrier the first base station can be not disturbed, and the subscriber equipment of the first base station can recover desired signal, and the method for the present embodiment also comprises:

S580. control described the second base station and transmit desired signal to described the second base station user on described first kind subcarrier, on described Second Type subcarrier, do not transmit any data-signal.

It should be noted that, if when the method for the present embodiment is carried out by the device that is independent of each base station, also can comprise described other the each steps of the first embodiment.

The application also provides the interference elimination method in the system of applying above-mentioned multi-carrier data transmission method.

The interference elimination method of the present embodiment the first embodiment is carried out by the subscriber equipment of the first base station or the device that is independent of the subscriber equipment of the first base station is carried out.As shown in Figure 6, described method comprises:

S610. be received in the first signal transmitting on first kind subcarrier and the secondary signal of transmitting on Second Type subcarrier;

S620. according to the secondary signal of transmitting on the Second Type subcarrier receiving, the first signal transmitting on the first kind subcarrier receiving is disturbed to elimination.

In the method for the present embodiment, receive data according to the type of subcarrier.Wherein, all types of subcarriers are as described in above-mentioned multi-carrier data transmission method embodiment.Also,, in the method for the present embodiment, first signal comprises the desired signal that the first base station sends to the subscriber equipment of the first base station; Secondary signal is interference is caused in the first base station interference signal to the subscriber equipment of described the second base station.

Eliminate in order to realize disturbing, the method for the present embodiment also comprises:

S630. determine subcarrier type and the MCS of transmitted signal on described subcarrier.Particularly, can obtain above-mentioned subcarrier type and corresponding MCS from carrying out the main body of above-mentioned multi-carrier data transmission method.

Determine that after the MCS of subcarrier type and correspondence, step S620 can comprise:

S621. according to the MCS of each layer on described Second Type subcarrier, secondary signal described in demodulating and decoding, obtains the 3rd layer signal and the 4th layer signal;

S622. use described the 4th layer signal and described first signal to carry out related calculation, recover the desired signal in first signal, and then eliminate and disturb;

Wherein, the subscriber equipment that described the 4th layer signal is the first base station is subject to the disturbed signal that disturb described the second base station.

The interference elimination method of the present embodiment the second embodiment is carried out by the subscriber equipment of the second base station or the device that is independent of the subscriber equipment of the second base station is carried out.As shown in Figure 7, described method comprises:

S710. be received in the first signal transmitting on first kind subcarrier and the secondary signal of transmitting on Second Type subcarrier;

S720. according to the secondary signal of transmitting on the Second Type subcarrier receiving, the first signal transmitting on the first kind subcarrier receiving is disturbed to elimination.

In the method for the present embodiment, receive data according to the type of subcarrier.Wherein, all types of subcarriers are as described in above-mentioned multi-carrier data transmission method embodiment.Also,, in the method for the present embodiment, first signal comprises the desired signal that the first base station sends to the subscriber equipment of the first base station; Secondary signal is interference is caused in the first base station interference signal to the subscriber equipment of described the second base station.

Eliminate in order to realize disturbing, the method for the present embodiment also comprises:

S730. determine subcarrier type and the MCS of transmitted signal on described subcarrier.Particularly, can obtain above-mentioned subcarrier type and corresponding MCS from carrying out the main body of above-mentioned multi-carrier data transmission method.

Determine that after the MCS of subcarrier type and correspondence, step S720 can comprise:

S721. use described first signal to deduct described secondary signal, obtain the 3rd signal;

S722. use the 3rd signal described in the MCS demodulating and decoding of described first kind subcarrier, obtain desired signal.

It will be appreciated by those skilled in the art that, in the said method of the specific embodiment of the invention, the sequence number size of each step does not also mean that the priority of execution sequence, the execution sequence of each step should be definite with its function and internal logic, and should not form any restriction to the implementation process of the specific embodiment of the invention.

In addition, the embodiment of the present application also provides a kind of computer-readable medium, is included in the computer-readable instruction that carries out following operation while being performed: carry out the operation of each step of the method in above-mentioned Fig. 3 illustrated embodiment.

The embodiment of the present application also provides a kind of computer-readable medium, is included in the computer-readable instruction that carries out following operation while being performed: carry out the operation of each step of the method in above-mentioned Fig. 5 illustrated embodiment.

The embodiment of the present application also provides a kind of computer-readable medium, is included in the computer-readable instruction that carries out following operation while being performed: carry out the operation of each step of the method in above-mentioned Fig. 6 illustrated embodiment.

The embodiment of the present application also provides a kind of computer-readable medium, is included in the computer-readable instruction that carries out following operation while being performed: carry out the operation of each step of the method in above-mentioned Fig. 7 illustrated embodiment.

The each embodiment of the application also provides a kind of multi-carrier data transmission device, and this device can be positioned at the first base station, the second base station or be the device that is independent of each base station.

The multi-carrier data transmission device of the application's the first embodiment is positioned at the first base station or for being independent of the device of each base station, as shown in Figure 8, the multi-carrier data transmission device 800 of the application's the first embodiment comprises:

The first sending module 810, for using first kind subcarrier to send desired signal to the subscriber equipment of the first base station.

The first sending module 810 is according to the characteristic of described first kind subcarrier, the desired signal that use first kind subcarrier sends to the subscriber equipment of the first base station is for modulating through hierarchical coding the first layer data-signal obtaining, and the lower floor of first layer data-signal is that strongly disturbing interference signal will be caused to the subscriber equipment of the second base station in the first base station.

The second sending module 820, for using Second Type subcarrier to send the first base station the subscriber equipment of described the second base station is caused the interference signal of interference to the subscriber equipment of described the first base station and the subscriber equipment of the second base station.

First kind subcarrier is in order to make the subscriber equipment of the first base station and the subscriber equipment of the second base station all can receive the information that Second Type subcarrier sends, the second sending module 820 is preferably by the above-mentioned interference signal of transmission of broadcast, in the device of the present embodiment, " broadcast " is for to make the subscriber equipment of the first base station and the subscriber equipment of the second base station can receive the any-mode of interference signal, and the second base station does not send downstream signal on Second Type subcarrier, to avoid interference the reception of the second user base station to interference signal.。

Although do not transmit new information on Second Type subcarrier,, by the noiseless transmission of signal on auxiliary first kind subcarrier, Second Type subcarrier has improved network throughput.

In the device of the application's the first embodiment, send interference signal by Second Type subcarrier, interference signal can be received by the subscriber equipment of the second base station, and for eliminating interference signal; Interference signal also can be received by the subscriber equipment of the first base station, for the desired signal of decoding, and then realizes the interference mixing under interference scene in heterogeneous network and eliminates.

In addition, as shown in Figure 9, the device 800 of the present embodiment also comprises:

The first determination module 830, for before the first sending module 810 and second sending module 820 its functions of execution, determines subcarrier type.

As shown in figure 10, the first determination module 830 can comprise:

The first receiving element 831, for receiving described subcarrier type, also from carrying out definite subcarrier type of base station outside the method for the embodiment of the present application or device.Or,

As shown in figure 11, the first determination module 830 can comprise:

The first determining unit 832, for signal to noise ratio snr and dry the making an uproar than INR of the downstream signal that receives on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station, determines described subcarrier type.Also, by the stator carrier type of device of the present embodiment own.Wherein:

Signal to noise ratio (SNR) and dry the making an uproar of the downstream signal that receiving terminal j receives on m subcarrier are respectively than (INR):

${\mathrm{SNR}}_i^m={\left|h_{\mathrm{ii}}^m\right|}^2{P_i}^m/N_0---\left(1\right)$

${\mathrm{INR}}_i^m={\left|h_{\mathrm{ij}}^m\right|}^2{P_j}^m/N_0---\left(2\right)$

for the transmitting power of transmitting terminal i (i=1,2), for the transmitting power of transmitting terminal j (j=1,2), for the channel gain from transmitting terminal i to receiving terminal i, for the channel gain from transmitting terminal i to receiving terminal j.

Particularly, the first determining unit 832 determines that the mode of subcarrier type all can be as follows:

Due to the variability of multipath fading, regardless of the position of the second base station and subscriber equipment thereof, all there is certain may occurring to mix and disturb scene.But, due to large scale decline, when the second base station approaches the first base station, more easily there is mixing the scene of disturbing.The satisfied condition of category-B subcarrier is also the condition of disturbing scene to occur of mixing in heterogeneous network.Also, definite subcarrier that meets following formula is category-B subcarrier:

${\mathrm{INR}}_n^m\≥{\mathrm{SNR}}_2^m---\left(3\right)$

${\log }_2(1+{\mathrm{INR}}_1^m)\≤{\log }_2(1+{\mathrm{SNR}}_1^m)-{\log }_2\left(\frac{1+{\mathrm{INR}}_2^m}{1+{\mathrm{SNR}}_2^m}\right)---\left(4\right)$

C class subcarrier can not directly provide transfer of data support to subscriber equipment.But, by C class subcarrier, subscriber equipment can receive the interference signal on category-B subcarrier, thereby makes category-B subcarrier realize noiseless transmission, and the data transfer rate that C class subcarrier provides all transforms in order to can be used for the data transfer rate of the subscriber equipment of service expectation on category-B subcarrier.If system is not used subcarrier cooperation, C class subcarrier also can transmit by the link that direct transfers so, so, in definite C class subcarrier, in order to ensure the lifting of data transfer rate, the performance boost that must make C class subcarrier bring is greater than the data transfer rate that adopts conventional transportation method to reach.On C class subcarrier, the two paths of data rate of transmitting by Tx1 cross link is greater than the data transfer rate that adopts conventional transmission mode.So should determine that the subcarrier that meets following formula is C class subcarrier:

${\mathrm{INR}}_2^m\≥{\mathrm{SNR}}_2^m---\left(3\right)$

${\mathrm{INR}}_2^m\≥{\mathrm{SNR}}_1^m---\left(5\right)$

Meeting above-mentioned formula (3) can make the maximum data rate that C class subcarrier transmits be not less than the data transfer rate upper bound (completely non-interference) of such subcarrier as category-A subcarrier.Also, such subcarrier is greater than as category-A subcarrier as the transmittability of C class subcarrier.And meet formula (5) and ensured the channel gain of C class subcarrier be better than the channel gain of category-B subcarrier thereby make to receive more information from the first base station compared with the subscriber equipment of the second base station and the subscriber equipment of the first base station, thereby prevent the wasting of resources.

Subcarrier except B, C two class subcarriers is category-A subcarrier.

In order to determine subcarrier type, as shown in figure 12, the device 800 of the present embodiment also comprises:

The first acquisition module 840, for obtaining described signal to noise ratio snr and dry making an uproar compared INR.

Can be by obtaining described signal to noise ratio snr and dry making an uproar than INR with each base station communication, or compare INR by signal to noise ratio snr and dry the making an uproar of obtaining response with each communications of user equipment.

Taking the transfer of data on the m subcarrier shown in Fig. 4 (a)-Fig. 4 (b) as example, the transmission mechanism on all kinds of subcarriers in the device of the present embodiment is described.

In Fig. 4 (a)-Fig. 4 (b), Tx1 is the first base station, and Rx1 is the subscriber equipment of the first base station, and Tx2 is the second base station, and Rx2 is the subscriber equipment of the second base station.Rx1 is a pair of associated subscriber equipment with Rx2, that is, Tx1 sends descending desired signal through the link (shown in solid arrow) that direct transfers to Rx1; The downstream signal of Tx1 is received by Rx2 through cross link (shown in dotted arrow), and Rx2 is caused to strong jamming; Tx2 sends descending desired signal through the link (shown in solid arrow) that direct transfers to Rx2; The downstream signal of Tx2 is received by Rx1 through cross link (shown in dotted arrow), and Rx1 is caused to strong jamming.In Fig. 4 (a), at transmitting terminal, post bar height represents the data transfer rate of transmitting terminal receiving terminal has two post bars, left side post bar represents the desired signal of transmitting terminal transmitting, right side post bar represents the signal that may cause interference from cross link, desired signal has represented its relation in amplitude space, i.e. power levels relation with the relative position relation of the signal that may cause interference.On subscriber equipment i from base station j, (the interference signal post bar of i ≠ j), its represented value in top and bottom is respectively with for subscriber equipment i, its disturbed signal is the lap of two post bars, and also, shown in Fig. 4 (a), what the desired signal of Rx2 was caused to interference is the signal from the L2 layer of the signal of Tx1; What the desired signal of Rx1 was caused to interference is the part corresponding with L21 layer in Fig. 4 (a) from Tx2.The value of the top and bottom of two post bars can be determined the line of demarcation shown in straight dashed line after determining, and then determines each layer height, in the method for the embodiment of the present application, in hierarchical modulation, distributes the power levels of each layer.In other words, the signal to noise ratio snr of the downstream signal receiving on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station and dry making an uproar than INR, can determine the power levels of lap.Correspondingly, as shown in figure 13, the device 800 of the present embodiment also comprises:

The second determination module 850, for the when dry ratio of making an uproar of noise of the downstream signal that receives on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station, determines described the first power levels and described the second power levels.

Each power levels of determining according to described the second determination module 850, as shown in figure 14, the first sending module 810 can comprise:

The first modulating-coding unit 811, for using hierarchical modulation coded system to carry out modulating-coding to described desired signal, obtains first layer data-signal.

Wherein, described first layer data-signal is divided into ground floor signal and second layer signal from top to bottom according to the first power levels.Described the first power levels is interference is caused in described the first base station power levels to the subscriber equipment of described the second base station.Described second layer signal is divided into the 3rd layer signal and the 4th layer signal from top to bottom according to the second power levels.Described the second power levels is interference is caused in described the second base station power levels to the subscriber equipment of described the first base station.Described second layer signal is described interference signal, the signal of the L2 layer as shown in Fig. 4 (a), the subscriber equipment that described the 4th layer signal is the first base station will be subject to the disturbed signal of described the second base station interference, the signal of the L21 layer as shown in Fig. 4 (a).

Use category-B subcarrier to send this first layer data-signal to the subscriber equipment of the first base station by the first base station.

As shown in figure 15, the second sending module 820 can further comprise:

The second modulating-coding unit 821, for using hierarchical modulation coded system to carry out modulating-coding to described interference signal, obtains the second individual-layer data signal.

Described interference signal is the signal of the L2 layer shown in Fig. 4 (a), can utilize the signal transmitting on C class subcarrier to disturb elimination in order to realize the subscriber equipment of each base station, in step S320, further this layer signal is carried out to layering, make described the second individual-layer data signal comprise from top to bottom described the 4th layer signal and described the 3rd layer signal, shown in Fig. 4 (b), be L21 ' and L22 ', the 4th layer signal corresponding to L21 ' layer is the L21 layer in Fig. 4 (a), and the 3rd layer signal corresponding to L22 ' layer is the L22 layer shown in Fig. 4 (a).On the power levels basis of each layer signal that the power levels of the each layer signal in other words, transmitting on C class subcarrier is transmitted on category-B subcarrier, put upside down.This is because for Rx1, only need the signal decoding desired signal of L21 layer; And for Rx2, need the signal (being also whole L2 layer) of L21 and L22 layer to disturb elimination.In addition the channel gain of C class subcarrier, be better than the channel gain of category-B type subcarrier therefore, cross link has larger capacity than the link that direct transfers.L21 ' layer is set and there is higher power levels than L22 ' layer, the Rx2 L2 layer of can decoding, and the Rx1 L21 ' layer of only can decoding.Rx1 unwanted signal is placed on to lower floor and can makes that resource is as much as possible to be utilized, also, the device of the present embodiment has improved the efficiency of transmission of C class subcarrier.

Use C class subcarrier to send this second individual-layer data signal to the subscriber equipment of the first base station by the first base station.

In addition, as shown in figure 16, for the device 800 of modulating-coding strategy (MCS) the present embodiment of definite every layer also comprises:

The 3rd determination module 860, for according to when dry making an uproar than the data transfer rate of determining each layer of described first layer data-signal and described the second individual-layer data signal of described noise.

Still be depicted as example with Fig. 4 (a) and Fig. 4 (b), can determine according to following formula the data transfer rate of each layer:

$r_{L1}^m=\min \{{\log }_2(1+{\mathrm{SNR}}_1^m),{\log }_2\left(\frac{1+{\mathrm{INR}}_2^m}{1+{\mathrm{SNR}}_2^m}\right)\}---\left(6\right)$

$r_{L2}^m={\log }_2(1+{\mathrm{SNR}}_1^m)-r_{L1}^m---\left(7\right)$

$r_{L21}^m={\log }_2(1+{\mathrm{INR}}_1^m)---\left(8\right)$

$r_{L22}^m=r_{L2}^m{-}_{L21}^m---\left(9\right)$

$r_{{L21}^{\′}}^m=r_{C1}^m={\log }_2(1+{\mathrm{SNR}}_1^m)---\left(10\right)$

$r_{{L21}^{\′}}^m+r_{{L22}^{\′}}^m=r_{C2}^m={\log }_2(1+{\mathrm{INR}}_2^m)---\left(11\right)$

The 4th determination module 870, for the data transfer rate of described each layer of determining according to the 3rd determination module 860, determines the coded modulation strategy of described each layer.Determine according to the data transfer rate of each layer the mature technology that the MCS of applicable each layer of selection is this area, therefore not to repeat here.

In addition, due to frequency selective fading, the signal to noise ratio on each subcarrier and dry making an uproar than being variable.In order to obtain higher network throughput, determine need to consider when subcarrier type on all types of subcarriers and data transfer rate, also as shown in figure 17, the first determination module 830 can comprise:

The 3rd determining unit 833, for determining described subcarrier type according to described signal to noise ratio, the described dry when described data transfer rate of making an uproar.In a kind of possible implementation, in order to make C class subcarrier can provide category-B subcarrier to be similar to the needed full detail of noiseless transmission, meanwhile, just ensure that C class subcarrier do not waste, while determining C class carrier wave, also need to meet the following conditions:

$\underset{m\∈C}{\mathrm{\Σ}}{r}_{C1}^m\≥\underset{m\∈B}{\mathrm{\Σ}}{r}_{L21}^m---\left(12\right)$

$\underset{m\∈C}{\mathrm{\Σ}}{r}_{C2}^m\≥\underset{m\∈B}{\mathrm{\Σ}}{r}_{L2}^m---\left(13\right)$

To sum up, in a kind of possible implementation, carry out the device of the present embodiment and determine that the process of subcarrier type is as follows:

S8321. the whole subcarriers that meet formula (3) and (4) are defined as to category-B subcarrier; The whole subcarriers that meet formula (3) and (5) are defined as C class subcarrier; All the other subcarriers are category-A subcarrier.

If S8322. meet formula (12) and (13), execution step S8323, otherwise, execution step S8324.

S8323. determine the subcarrier in C class subcarrier for category-A subcarrier, and recalculate with .If meet formula (12) and (13), repeated execution of steps S8322, otherwise, finish.

S8324. determine the subcarrier in category-B subcarrier for category-A subcarrier, and recalculate with .If do not meet formula (12) and (13), repeated execution of steps S8324, otherwise, finish.

Wherein, what arg max g (t) expressed is a subset of the domain of definition, and in this subset, arbitrary element all can make function g (t) get maximum; What arg mix g (t) expressed is a subset of the domain of definition, and in this subset, arbitrary element all can make function g (t) get minimum value.

As shown in figure 18, the device 800 of the present embodiment also comprises:

The 3rd sending module 880, for being while being independent of the device of each base station at the device of the present embodiment, to described the first base station with described the second base station sends the type of subcarrier and the coded modulation strategy of transmitted signal on described subcarrier.And/or, send the type of subcarrier and the MCS of transmitted signal on described subcarrier for the subscriber equipment of the subscriber equipment to described the first base station and described the second base station.

It should be noted that, in addition, in order to make the interference signal that transmits on C class subcarrier the first base station can be not disturbed, and the subscriber equipment of the first base station can recover desired signal, and as shown in figure 19, the device 800 of the present embodiment also comprises:

The first control module 890 is transmitted desired signal to described the second base station user for controlling described the second base station on described first kind subcarrier, on described Second Type subcarrier, does not transmit any data-signal.

To sum up, the Array selection of the embodiment of the present application goes out a part of subcarrier and is specifically designed to auxiliary interference and eliminates, and in this section on subcarrier, the data that directly transmission system needs, help other carrier wave and carry out interference delete but retransmit a part of data.Meanwhile, in order to ensure the lifting of systematic function, the transmission means on subcarrier has been carried out special design, can make full use of channel condition, makes the performance gain of system more obvious.

It is a kind of by being independent of the device of each base station or being positioned at the multi-carrier data transmission device of the second base station that the application also provides, and as shown in figure 20, the multi-carrier data transmission device 2000 of the application's the second embodiment comprises:

The 5th determination module 2010, for determining available subcarrier.In the device of the present embodiment, mainly refer to the subcarrier that can use of the second base station, the subcarrier that the second base station can be used is conventionally by the first base station assigns, therefore, the 5th determination module 2010 can be from the first base station or the second base station determine available subcarrier.

The 6th determination module 2020, for determining described subcarrier type.

Wherein, described subcarrier is divided into first kind subcarrier and Second Type subcarrier, transmits the desired signal that the first base station sends to the first base station user on described first kind subcarrier; Described Second Type subcarrier is uploaded the interference signal that transfers to the first base station that the subscriber equipment of described the first base station and the subscriber equipment of the second base station send the subscriber equipment of described the second base station is caused interference.And the characteristic of all types of subcarriers is as described in the method for the first embodiment.

In the device of the application's the second embodiment, mix the interference of disturbing under scene and eliminate by subcarrier type being divided to the transmission that is used in signal with different type, can assist to realize in heterogeneous network.

When the device of the present embodiment is positioned at the second base station, subcarrier type can be definite by the first base station, or determined by the device that is independent of each base station, and correspondingly, as shown in figure 21, the 6th determination module 2020 can comprise:

The second receiving element 2021, for from the first base station or the device that is independent of each base station obtain definite subcarrier type.

Subcarrier type also can be definite by the device of the present embodiment itself, and correspondingly, as shown in figure 22, the 6th determination module 2020 can comprise:

The 4th determining unit 2022, for the when dry ratio of making an uproar of noise of the downstream signal that receives on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station, determines described subcarrier type.Particularly, can determine described subcarrier type with reference to the description of the above-mentioned device about the first embodiment.

In order to determine described subcarrier type, as shown in figure 23, the device 2000 of the present embodiment also comprises:

The second acquisition module 2030, for obtaining the when dry ratio of making an uproar of described noise.

Can be by obtaining described signal to noise ratio snr and dry making an uproar than INR with each base station communication, or by directly obtaining corresponding signal to noise ratio snr with each communications of user equipment and dry making an uproar compared INR.

As described in the device about the first embodiment, the desired signal transmitting on described first kind subcarrier is the first layer data-signal through hierarchical modulation coding; The interference signal of transmitting on described Second Type subcarrier is the second individual-layer data signal through hierarchical modulation coding.Correspondingly, as shown in figure 24, the device 2000 of the present embodiment also comprises:

The 7th determination module 2040, for according to the when dry ratio of making an uproar of described noise, determines in described first layer data-signal and described the second individual-layer data signal the data transfer rate of each layer.The data transfer rate of each layer is as described about the 3rd determination module 860 in the first device embodiment.

Due to frequency selective fading, the signal to noise ratio on each subcarrier and dry making an uproar than being variable.In order to obtain higher network throughput, determine need to consider when subcarrier type on all types of subcarriers and data transfer rate, also, as shown in figure 25, the 6th determination module 2020 in the device 2000 of the present embodiment can comprise:

The 5th determining unit 2023 is for determining described subcarrier type according to described signal to noise ratio, the described dry when described data transfer rate of making an uproar, concrete as described about the 3rd determining unit 833 in the first device embodiment.

If the device of the present embodiment is the device that is independent of each base station, as shown in figure 26, this device 2000 also comprises:

The 3rd sending module 2050, for to described the first base station and described the second base station sends the type of described subcarrier and on described subcarrier the MCS of transmitted signal, to make each base station to send data-signal according to the type of subcarrier.And/or send the type of subcarrier and the MCS of transmitted signal on described subcarrier for the subscriber equipment of the subscriber equipment to described the first base station and described the second base station.

In addition, in order to make the interference signal that transmits on C class subcarrier the first base station can be not disturbed, and the subscriber equipment of the first base station can recover desired signal, and as shown in figure 27, the device 2000 of the present embodiment also comprises:

The second control module 2060 is transmitted desired signal to described the second base station user for controlling described the second base station on described first kind subcarrier, on described Second Type subcarrier, does not transmit any data-signal.

It should be noted that, if the device of the present embodiment is while being independent of the device of each base station, also can comprise the described each unit module of the first device embodiment.

The application also provides the interference blanking unit in the system of applying above-mentioned multi-carrier data transmission method.

The interference blanking unit of the present embodiment the first embodiment is positioned at the subscriber equipment of the first base station, or for being independent of and serving the device of the subscriber equipment of the first base station.As shown in figure 28, described device 2800 comprises:

Receiver module 2810, for being received in the first signal transmitting on first kind subcarrier and the secondary signal of transmitting on Second Type subcarrier.

Interference cancellation module 2820, for according to the secondary signal of transmitting on the Second Type subcarrier receiving, disturbs elimination to the first signal transmitting on the first kind subcarrier receiving.

In the device of the present embodiment, receive data according to the type of subcarrier.Wherein, all types of subcarriers are as described in above-mentioned multi-carrier data transmission method embodiment.Also,, in the device of the present embodiment, first signal comprises the desired signal that the first base station sends to the subscriber equipment of the first base station; Secondary signal is interference is caused in the first base station interference signal to the subscriber equipment of described the second base station.

Eliminate in order to realize disturbing, as shown in figure 29, the device 2800 of the present embodiment also comprises:

The 8th determination module 2830, user determines subcarrier type and the MCS of transmitted signal on described subcarrier.Particularly, can obtain above-mentioned subcarrier type and corresponding MCS from carrying out the main body of above-mentioned multi-carrier data transmission method.

As shown in figure 30, interference cancellation module 2820 can comprise:

Demodulating and decoding unit 2821, for according to the MCS of each layer on described Second Type subcarrier, secondary signal described in demodulating and decoding, obtains the 3rd layer signal and the 4th layer signal;

Interference cancellation unit 2822, for using described the 4th layer signal and described first signal to carry out related calculation, recovers the desired signal in first signal, and then eliminates and disturb;

Wherein, the subscriber equipment that described the 4th layer signal is the first base station is subject to the disturbed signal that disturb described the second base station.

The interference blanking unit of the present embodiment the second embodiment is positioned at the subscriber equipment of the second base station, or for being independent of and serving the device of the subscriber equipment of the second base station.As shown in figure 31, described device 3100 comprises:

Receiver module 3110, for being received in the first signal transmitting on first kind subcarrier and the secondary signal of transmitting on Second Type subcarrier.

Interference cancellation module 3120, for according to the secondary signal of transmitting on the Second Type subcarrier receiving, disturbs elimination to the first signal transmitting on the first kind subcarrier receiving.

In the device of the present embodiment, receive data according to the type of subcarrier.Wherein, all types of subcarriers are as described in above-mentioned multi-carrier data transmission method embodiment.Also,, in the device of the present embodiment, first signal comprises the desired signal that the first base station sends to the subscriber equipment of the first base station; Secondary signal is interference is caused in the first base station interference signal to the subscriber equipment of described the second base station.

Eliminate in order to realize disturbing, shown in figure 32, the device 3100 of the present embodiment also comprises:

The 9th determination module 3130, for determining subcarrier type and the MCS of transmitted signal on described subcarrier.Particularly, can obtain above-mentioned subcarrier type and corresponding MCS from carrying out the main body of above-mentioned multi-carrier data transmission method.

As shown in figure 33, interference cancellation module 3120 can comprise:

Interference cancellation unit 3121, for using described first signal to deduct described secondary signal, obtains the 3rd signal;

Demodulating and decoding unit 3122, for using the 3rd signal described in the MCS demodulating and decoding of described first kind subcarrier, obtains desired signal.

The structural representation of a kind of multi-carrier data transmission device 3400 that Figure 34 provides for the embodiment of the present application, the specific embodiment of the invention does not limit the specific implementation of multi-carrier data transmission device 3400.As shown in figure 34, this multi-carrier data transmission device 3400 can comprise:

Processor (processor) 3410, communication interface (Communications Interface) 3420, memory (memory) 3430 and communication bus 3440.Wherein:

Processor 3410, communication interface 3420 and memory 3430 complete mutual communication by communication bus 3440.

Communication interface 3420, for net element communication such as client etc.

Processor 3410, for executive program 3432, specifically can realize the correlation function of multi-carrier data transmission device in the device embodiment of above-mentioned Fig. 5.

Particularly, program 3432 can comprise program code, and described program code comprises computer-managed instruction.

Processor 3410 may be a central processor CPU, or specific integrated circuit ASIC (Application Specific Integrated Circuit), or is configured to implement one or more integrated circuits of the embodiment of the present invention.Program 3432 specifically can be for making described multi-carrier data transmission device 3400 carry out following steps::

Use first kind subcarrier to send desired signal to the subscriber equipment of the first base station; And

Use Second Type subcarrier to send the first base station the subscriber equipment of described the second base station is caused the interference signal of interference to the subscriber equipment of described the first base station and the subscriber equipment of the second base station.

In program 3432, the specific implementation of each step can, referring to description corresponding in the corresponding steps in above-described embodiment and unit, be not repeated herein.Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the equipment of foregoing description and module, can describe with reference to the corresponding process in preceding method embodiment, does not repeat them here.

The structural representation of a kind of multi-carrier data transmission device 3500 that Figure 35 provides for the embodiment of the present application, the specific embodiment of the invention does not limit the specific implementation of multi-carrier data transmission device 3500.As shown in figure 35, this multi-carrier data transmission device 3500 can comprise:

Processor (processor) 3510, communication interface (Communications Interface) 3520, memory (memory) 3530 and communication bus 3540.Wherein:

Processor 3510, communication interface 3520 and memory 3530 complete mutual communication by communication bus 3540.

Communication interface 3520, for net element communication such as client etc.

Processor 3510, for executive program 3532, specifically can realize the correlation function of multi-carrier data transmission device in the device embodiment of above-mentioned Fig. 6.

Particularly, program 3532 can comprise program code, and described program code comprises computer-managed instruction.

Processor 3510 may be a central processor CPU, or specific integrated circuit ASIC (Application Specific Integrated Circuit), or is configured to implement one or more integrated circuits of the embodiment of the present invention.Program 3532 specifically can be for making described multi-carrier data transmission device 3500 carry out following steps:

Determine available subcarrier;

Determine described subcarrier type;

Wherein, described subcarrier is divided into first kind subcarrier and Second Type subcarrier, transmits the desired signal that the first base station sends to the first base station user on described first kind subcarrier; Described Second Type subcarrier is uploaded the interference signal that transfers to the first base station that the subscriber equipment of described the first base station and the subscriber equipment of the second base station send the subscriber equipment of described the second base station is caused interference.

In program 3532, the specific implementation of each step can, referring to description corresponding in the corresponding steps in above-described embodiment and unit, be not repeated herein.Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the equipment of foregoing description and module, can describe with reference to the corresponding process in preceding method embodiment, does not repeat them here.

The structural representation of a kind of interference blanking unit 3600 that Figure 36 provides for the embodiment of the present application, the specific embodiment of the invention does not limit the specific implementation of interference blanking unit 3600.As shown in figure 36, this interference blanking unit 3600 can comprise:

Processor (processor) 3610, communication interface (Communications Interface) 3620, memory (memory) 3630 and communication bus 3640.Wherein:

Processor 3610, communication interface 3620 and memory 3630 complete mutual communication by communication bus 3640.

Communication interface 3620, for net element communication such as client etc.

Processor 3610, for executive program 3632, specifically can realize the correlation function of interference blanking unit in the device embodiment of above-mentioned Fig. 7.

Particularly, program 3632 can comprise program code, and described program code comprises computer-managed instruction.

Processor 3610 may be a central processor CPU, or specific integrated circuit ASIC (Application Specific Integrated Circuit), or is configured to implement one or more integrated circuits of the embodiment of the present invention.Program 3632 specifically can be for making described interference blanking unit 3600 carry out following steps:

Be received in the first signal transmitting on first kind subcarrier and the secondary signal of transmitting on Second Type subcarrier;

According to the secondary signal of transmitting on the Second Type subcarrier receiving, the first signal transmitting on the first kind subcarrier receiving is disturbed to elimination.

In program 3632, the specific implementation of each step can, referring to description corresponding in the corresponding steps in above-described embodiment and unit, be not repeated herein.Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the equipment of foregoing description and module, can describe with reference to the corresponding process in preceding method embodiment, does not repeat them here.

Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the equipment of foregoing description and module, can describe with reference to the correspondence in aforementioned means embodiment, does not repeat them here.

Although theme described herein is the execution in computer system and providing in the general context carried out in binding operation system and application program, but also one skilled in the art will recognize that and can carry out other realizations in conjunction with the program module of other types.Generally speaking, program module comprises the structure of carrying out particular task or realizing routine, program, assembly, data structure and the other types of particular abstract data type.It will be appreciated by those skilled in the art that, this theme described herein can be put into practice by other computer system configurations, comprise portable equipment, multicomputer system, based on microprocessor or programmable consumer electronics, minicom, mainframe computer etc., also can use in the distributed computing environment (DCE) that task is carried out by the teleprocessing equipment connecting by communication network therein.In distributed computing environment (DCE), program module can be arranged in both of local and remote memory storage device.

Those of ordinary skill in the art can recognize, unit and the method step of each example of describing in conjunction with embodiment disclosed herein, can realize with the combination of electronic hardware or computer software and electronic hardware.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can realize described function with distinct methods to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.

If described function realizes and during as production marketing independently or use, can be stored in a computer read/write memory medium using the form of SFU software functional unit.Based on such understanding, the part that technical scheme of the present invention contributes to original technology in essence in other words or the part of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out all or part of step of method described in each embodiment of the present invention.And aforesaid computer read/write memory medium comprises storing as any mode of the information such as computer-readable instruction, data structure, program module or other data or physics volatibility that technology realizes and non-volatile, removable and can not be because of eastern medium.Computer read/write memory medium specifically comprises, but be not limited to, USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), Erasable Programmable Read Only Memory EPROM (EPROM), EEPROM (Electrically Erasable Programmable Read Only Memo) (EEPROM), flash memory or other solid-state memory technology, CD-ROM, digital versatile disc (DVD), HD-DVD, blue light (Blue-Ray) or other light storage devices, tape, disk storage or other magnetic storage apparatus, maybe can be used for storing information needed and can be by any other medium of computer access.

Above execution mode is only for illustrating the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.

Claims (58)

1. a multi-carrier data transmission method, is characterized in that, described method comprises:

Use first kind subcarrier to send desired signal to the subscriber equipment of the first base station; And

Use Second Type subcarrier to send described the first base station the subscriber equipment of described the second base station is caused the interference signal of interference to the subscriber equipment of described the first base station and the subscriber equipment of the second base station.

2. method according to claim 1, is characterized in that, described method also comprises:

Determine subcarrier type.

3. method according to claim 2, is characterized in that, described definite described subcarrier type comprises:

Receive the type of described subcarrier.

4. method according to claim 2, is characterized in that, described definite described subcarrier type comprises:

The noise of the downstream signal receiving on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station is the dry ratio of making an uproar when, determines described subcarrier type.

5. method according to claim 4, is characterized in that, described method also comprises:

Obtain the when dry ratio of making an uproar of described noise.

6. according to the method described in any one in claim 2 to 5, it is characterized in that, described use first kind subcarrier sends desired signal to the subscriber equipment of the first base station and comprises:

Use hierarchical modulation coded system to carry out modulating-coding to described desired signal, obtain first layer data-signal;

Wherein, described first layer data-signal is divided into ground floor signal and second layer signal from top to bottom according to the first power levels;

Described second layer signal is divided into the 3rd layer signal and the 4th layer signal from top to bottom according to the second power levels;

Described second layer signal is described interference signal, and the subscriber equipment that described the 4th layer signal is described the first base station will be subject to the disturbed signal of described the second base station interference.

7. method according to claim 6, is characterized in that, described method also comprises:

The noise of the downstream signal receiving on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station is the dry ratio of making an uproar when, determines described the first power levels and described the second power levels;

Described the first power levels is interference is caused in described the first base station power levels to the subscriber equipment of described the second base station;

Described the second power levels is interference is caused in described the second base station power levels to the subscriber equipment of described the first base station.

8. method according to claim 6, it is characterized in that, described use Second Type subcarrier sends described the first base station to the subscriber equipment of described the first base station and the subscriber equipment of the second base station and causes the interference signal of interference to comprise to the subscriber equipment of described the second base station:

Use hierarchical modulation coded system to carry out modulating-coding to described interference signal, obtain the second individual-layer data signal;

Wherein, described the second individual-layer data signal comprises described the 4th layer signal and described the 3rd layer signal from top to bottom.

9. method according to claim 8, is characterized in that, described method also comprises:

According to when dry making an uproar than the data transfer rate of determining in described first layer data-signal and described the second individual-layer data signal each layer of described noise.

10. method according to claim 9, is characterized in that, described definite described subcarrier type comprises:

Determine described subcarrier type according to described signal to noise ratio, the described dry when described data transfer rate of making an uproar.

11. methods according to claim 9, is characterized in that, described method also comprises:

According to the data transfer rate of described each layer, determine the coded modulation strategy of described each layer.

12. methods according to claim 11, is characterized in that, described method also comprises:

To described the first base station with described the second base station sends the type of subcarrier and the coded modulation strategy of transmitted signal on described subcarrier.

13. methods according to claim 11, is characterized in that, described method also comprises:

Send the type of subcarrier and the coded modulation strategy of transmitted signal on described subcarrier to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station.

14. according to the method described in any one in claim 1 to 13, it is characterized in that, described use Second Type subcarrier sends described the first base station to the subscriber equipment of described the first base station and the subscriber equipment of the second base station and the subscriber equipment of described the second base station is caused in the interference signal of interference:

Send the relevant information of described interference signal by the mode of broadcast.

15. according to the method described in any one in claim 1 to 14, it is characterized in that, described method also comprises:

Control described the second base station and transmit desired signal to described the second base station user on described first kind subcarrier, on described Second Type subcarrier, do not transmit any data-signal.

16. 1 kinds of multi-carrier data transmission methods, is characterized in that, described method comprises:

Determine available subcarrier;

Determine described subcarrier type;

Wherein, described subcarrier is divided into first kind subcarrier and Second Type subcarrier, transmits the desired signal that the first base station sends to the first base station user on described first kind subcarrier; Described Second Type subcarrier is uploaded the interference signal that transfers to described the first base station that the subscriber equipment of described the first base station and the subscriber equipment of the second base station send the subscriber equipment of described the second base station is caused interference.

17. methods according to claim 16, is characterized in that, described definite described subcarrier type comprises:

Receive described subcarrier type.

18. methods according to claim 16, is characterized in that, described definite described subcarrier type comprises:

The noise of the downstream signal receiving on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station is the dry ratio of making an uproar when, determines described subcarrier type.

19. methods according to claim 18, is characterized in that, described method also comprises:

Obtain the when dry ratio of making an uproar of described noise.

20. methods according to claim 16, is characterized in that, the desired signal transmitting on described first kind subcarrier is the first layer data-signal through hierarchical modulation coding; The interference signal of transmitting on described Second Type subcarrier is the second individual-layer data signal through hierarchical modulation coding;

Described method also comprises:

The noise of the downstream signal receiving on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station is the dry ratio of making an uproar when, determines in described first layer data-signal and described the second individual-layer data signal the data transfer rate of each layer.

21. methods according to claim 20, is characterized in that, described definite described subcarrier type comprises:

Determine described subcarrier type according to described signal to noise ratio, the described dry when described data transfer rate of making an uproar.

22. methods according to claim 20, is characterized in that, described method also comprises:

According to the data transfer rate of described each layer, determine the coded modulation strategy of described each layer.

23. methods according to claim 22, is characterized in that, described method also comprises:

To described the first base station and described the second base station sends described subcarrier type and the coded modulation strategy of transmitted signal on described subcarrier.

24. methods according to claim 22, is characterized in that, described method also comprises:

Send subcarrier type and the coded modulation strategy of transmitted signal on described subcarrier to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station.

25. according to claim 16 to the method described in any one in 24, it is characterized in that, described method also comprises:

Control described the second base station and transmit desired signal to described the second base station user on described first kind subcarrier, on described Second Type subcarrier, do not transmit any data-signal.

26. 1 kinds of interference elimination methods, is characterized in that, described method comprises:

Be received in the first signal transmitting on first kind subcarrier and the secondary signal of transmitting on Second Type subcarrier;

According to the secondary signal of transmitting on the Second Type subcarrier receiving, the first signal transmitting on the first kind subcarrier receiving is disturbed to elimination.

27. methods according to claim 26, is characterized in that, described method also comprises:

Determine subcarrier type and the coded modulation strategy of transmitted signal on described subcarrier.

28. methods according to claim 27, is characterized in that, the secondary signal of transmitting on the Second Type subcarrier that described basis receives is disturbed elimination to the first signal transmitting on the first kind subcarrier receiving, and comprising:

According to the coded modulation strategy of described Second Type subcarrier, secondary signal described in demodulating and decoding, obtains the 3rd layer signal and the 4th layer signal;

Use described the 4th layer signal and described first signal to carry out related calculation, recover the desired signal in described first signal;

Wherein, the subscriber equipment that described the 4th layer signal is the first base station is subject to the disturbed signal that disturb the second base station.

29. methods according to claim 27, is characterized in that, it is characterized in that, the secondary signal of transmitting on the Second Type subcarrier that described basis receives is disturbed elimination to the first signal transmitting on the first kind subcarrier receiving, and comprising:

Use described first signal to deduct described secondary signal, obtain the 3rd signal;

Use the 3rd signal described in the coded modulation strategy demodulating and decoding of described first kind subcarrier, obtain the desired signal in described first signal.

30. 1 kinds of multi-carrier data transmission devices, is characterized in that, described device comprises:

One first sending module, for using first kind subcarrier to send desired signal to the subscriber equipment of the first base station; And

One second sending module, for using Second Type subcarrier to send described the first base station the subscriber equipment of described the second base station is caused the interference signal of interference to the subscriber equipment of described the first base station and the subscriber equipment of the second base station.

31. devices according to claim 30, is characterized in that, described device also comprises:

One first determination module, for determining subcarrier type.

32. devices according to claim 31, is characterized in that, described the first determination module comprises:

One first receiving element, for receiving described subcarrier type.

33. devices according to claim 31, is characterized in that, described the first determination module comprises:

One first determining unit, for the when dry ratio of making an uproar of noise of the downstream signal that receives on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station, determines described subcarrier type.

34. devices according to claim 33, is characterized in that, described device also comprises:

One first acquisition module, for obtaining the when dry ratio of making an uproar of described noise.

35. according to the device described in any one in claim 31 to 34, it is characterized in that, described the first sending module comprises:

One first modulating-coding unit, for using hierarchical modulation coded system to carry out modulating-coding to described desired signal, obtains first layer data-signal;

Wherein, described first layer data-signal is divided into ground floor signal and second layer signal from top to bottom according to the first power levels;

Described second layer signal is divided into the 3rd layer signal and the 4th layer signal from top to bottom according to the second power levels;

Described second layer signal is described interference signal, and the subscriber equipment that described the 4th layer signal is described the first base station will be subject to the disturbed signal of described the second base station interference.

36. devices according to claim 35, is characterized in that, described device also comprises:

One second determination module, for the when dry ratio of making an uproar of noise of the downstream signal that receives on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station, determines described the first power levels and described the second power levels;

Described the first power levels is interference is caused in described the first base station power levels to the subscriber equipment of described the second base station;

Described the second power levels is interference is caused in described the second base station power levels to the subscriber equipment of described the first base station.

37. devices according to claim 35, is characterized in that, described the second sending module comprises:

One second modulating-coding unit, for using hierarchical modulation coded system to carry out modulating-coding to described interference signal, obtains the second individual-layer data signal;

Wherein, described the second individual-layer data signal comprises described the 4th layer signal and described the 3rd layer signal from top to bottom.

38. according to the device described in claim 37, it is characterized in that, described device also comprises:

One the 3rd determination module, for according to when dry making an uproar than the data transfer rate of determining each layer of described first layer data-signal and described the second individual-layer data signal of described noise.

39. according to the device described in claim 38, it is characterized in that, described the first determination module comprises:

One the 3rd determining unit, for determining described subcarrier type according to described signal to noise ratio, the described dry when described data transfer rate of making an uproar.

40. according to the device described in claim 38, it is characterized in that, described device also comprises:

One the 4th determination module, for according to the data transfer rate of described each layer, determines the coded modulation strategy of described each layer.

41. according to the device described in claim 40, it is characterized in that, described device also comprises:

One the 3rd sending module, for to described the first base station with described the second base station sends subcarrier type and the coded modulation strategy of transmitted signal on described subcarrier.

42. according to the device described in claim 40, it is characterized in that, described device also comprises:

One the 3rd sending module, sends described subcarrier type and the coded modulation strategy of transmitted signal on described subcarrier for the subscriber equipment of the subscriber equipment to described the first base station and described the second base station.

43. according to the device described in any one in claim 30 to 42, it is characterized in that, described the second sending module sends the relevant information of described interference signal by the mode of broadcast.

44. according to the device described in any one in claim 30 to 43, it is characterized in that, described device also comprises:

One first control module is transmitted desired signal to described the second base station user for controlling described the second base station on described first kind subcarrier, on described Second Type subcarrier, does not transmit any data-signal.

45. 1 kinds of multi-carrier data transmission devices, is characterized in that, described device comprises:

One the 5th determination module, for determining available subcarrier;

One the 6th determination module, for determining described subcarrier type;

Wherein, described subcarrier is divided into first kind subcarrier and Second Type subcarrier, transmits the desired signal that the first base station sends to the first base station user on described first kind subcarrier; Described Second Type subcarrier is uploaded the interference signal that transfers to described the first base station that the subscriber equipment of described the first base station and the subscriber equipment of the second base station send the subscriber equipment of described the second base station is caused interference.

46. according to the device described in claim 45, it is characterized in that, described the 6th determination module comprises:

One second receiving element, for receiving described subcarrier type.

47. according to the device described in claim 45, it is characterized in that, described the 6th determination module comprises:

One the 4th determining unit, for the when dry ratio of making an uproar of noise of the downstream signal that receives on subcarrier according to the subscriber equipment of described the first base station and the subscriber equipment of described the second base station, determines described subcarrier type.

48. according to the device described in claim 47, it is characterized in that, described device also comprises:

One second acquisition module, for obtaining the when dry ratio of making an uproar of described noise.

49. according to the device described in claim 45, it is characterized in that, the desired signal transmitting on described first kind subcarrier is the first layer data-signal through hierarchical modulation coding; The interference signal of transmitting on described Second Type subcarrier is the second individual-layer data signal through hierarchical modulation coding;

Described device also comprises:

One the 7th determination module, for according to the when dry ratio of making an uproar of described noise, determines in described first layer data-signal and described the second individual-layer data signal the data transfer rate of each layer.

50. according to the device described in claim 49, it is characterized in that, described the 6th determination module comprises:

One the 5th determining unit, for determining described subcarrier type according to described signal to noise ratio, the described dry when described data transfer rate of making an uproar.

51. according to the device described in claim 49, it is characterized in that, described device also comprises:

One the 7th determination module, for according to the data transfer rate of described each layer, determines the coded modulation strategy of described each layer.

52. according to the method described in claim 51, it is characterized in that, described device also comprises:

One the 3rd sending module, for to described the first base station and described the second base station sends described subcarrier type and the coded modulation strategy of transmitted signal on described subcarrier.

53. according to the method described in claim 51, it is characterized in that, described device also comprises:

One the 3rd sending module, sends described subcarrier type and the coded modulation strategy of transmitted signal on described subcarrier for the subscriber equipment of the subscriber equipment to described the first base station and described the second base station.

54. according to the device described in any one in claim 45 to 53, it is characterized in that, described device also comprises:

One second control module is transmitted desired signal to described the second base station user for controlling described the second base station on described first kind subcarrier, on described Second Type subcarrier, does not transmit any data-signal.

55. 1 kinds of interference blanking units, is characterized in that, described device comprises:

One receiver module, for being received in the first signal transmitting on first kind subcarrier and the secondary signal of transmitting on Second Type subcarrier;

One first interference cancellation module, for according to the secondary signal of transmitting on the Second Type subcarrier receiving, disturbs elimination to the first signal transmitting on the first kind subcarrier receiving.

56. according to the device described in claim 55, it is characterized in that, described device also comprises:

One the 8th determination module, for determining subcarrier type and the coded modulation strategy of transmitted signal on described subcarrier.

57. according to the device described in claim 56, it is characterized in that, described the first interference cancellation module comprises:

One first demodulating and decoding unit, for the coded modulation strategy according to described Second Type subcarrier, secondary signal described in demodulating and decoding, obtains the 3rd layer signal and the 4th layer signal;

One first interference cancellation unit, for using described the 4th layer signal and described first signal to carry out related calculation, recovers the desired signal in described first signal;

Wherein, the subscriber equipment that described the 4th layer signal is the first base station is subject to the disturbed signal that disturb the second base station.

58. according to the device described in claim 56, it is characterized in that, it is characterized in that, described the first interference cancellation module comprises:

One second interference cancellation unit, for using described first signal to deduct described secondary signal, obtains the 3rd signal;

One second demodulating and decoding unit, for using the 3rd signal described in the coded modulation strategy demodulating and decoding of described first kind subcarrier, obtains the desired signal in described first signal.