The present invention generally relates to wireless communication methods and wireless communication devices, particularly, to a method and apparatus for canceling interference in a mobile communication system.
Background technique
[0002]
With the continuous development of mobile communications, the interference issue has become one of the key issues limiting system throughput. This has been a lot of research, mainly affect the reduce interference from the transmitter and receiver ends of the two aspects. At the transmitting end, a time domain and frequency domain resources are allocated dynamically. In the frequency domain, the trigger information is transmitted between base stations, thereby controlling the transmission power and other resources. Carrier aggregation is another way, primarily for cell-edge users, receiving data by cross-carrier scheduling. In the time domain, blank subframe An approximate technique, to create a protected subframe is an interfered user interference source by reducing the level of activity in certain subframe, the subframe guard period, the source does not transmit any interfering signal, only the interfere with the user is active. At the receiving end, the receiver made a number of enhanced algorithm, comprising the following main technologies: interference suppression technology, which is a signal received linear filtering process, thereby suppressing the interference; Maximum likelihood receiver technique that optimal system performance can be obtained, but because of high complexity, difficult to implement in a practical system; successive interference cancellation techniques, this technology compromise in terms of performance and complexity. These techniques improve the reuse factor, the overall system does not change the degree of freedom.
[0003]
Interference alignment technique is a technique for effective anti-jamming proposed in recent years, the signal space is divided into the desired signal and the interference signal space two space portions, so that interference by pre-coding technique overlap at the receiving end, thereby compressing the interference signal signal capacity occupied by eliminating the influence of interference signals on the desired signal, in order to increase the degree of freedom of the system to achieve effectively the purpose of improving the system throughput.
[0004]
Will use the new waveform in the future mobile communication systems, e.g., general purpose filtering multicarrier (Universal filtered multicarrier, UFMC), filtered - orthogonal frequency-division multiplexing (Filtered orthogonal frequency division multiplexing, F-OFDM) and the like, to remove interference in different sub-bands at different frequency offsets produced. However, the above-described interference cancellation techniques are based on the traditional waveform, without taking into account the characteristics of the new waveform future mobile communication systems may be employed.
[0005]
Accordingly, it is desirable to provide a scheme for canceling interference for the new waveform future communications, and more preferably that the interference cancellation scheme can be compatible with traditional waveforms.
[0006]
SUMMARY
[0007]
To this end, the present invention proposes to solve the above interference can be one or more of the problems of cancellation scheme.
[0008]
According to one aspect of the present invention, there is provided an electronic device for performing wireless communication with two communication devices, said electronic device comprising processing circuitry, the processing circuitry is configured to: acquire the first set of communication devices parameter related to the first waveform, the first waveform parameter used to form the communication signal waveform relating to a first set of communication devices; first waveform parameter of said second set of communication to notify the device to said second set of communication devices capable of determining the precoding matrix used for communication with the second set of communication devices based on the first waveform parameter.
[0009]
According to another aspect of the invention there is provided a second communication device a first set of communication devices in a communication system, the communication system comprises a first set of communication devices and a second set of communication devices, said first second communication device comprises a processing circuit, the processing circuitry is configured to: based on determining the first set of communication device parameters related to the first waveform and the second communication device a second set of related waveform parameters for the set of precoding matrices a first communication with the communication device, wherein said first waveform parameter used to form the communication signal waveform group for the first communication device, said second waveform parameter for the communication signal waveform is formed of a communication device related to a second group.
[0010]
According to another aspect of the invention there is provided a communication method in a communication system, the communication system includes a base, a first set of communication devices by the first communication device and the second communication device composed by a third communication device and a fourth set of communication devices and a second communication device composed, the method comprising: reporting to the base station waveform parameters set by the first communication device in a first communication device, said communication with said first waveform parameter forming a signal waveform transmitted by the relevant device; estimated by the first set of communication devices in the second communication device to said base station at said second communication device by the channel state information; by the base station from the a first set of waveform parameters and channel state information to notify the communication device acquires said second set of communication devices fourth communication apparatus; by the fourth communication device is determined based on the following for the second set of communication devices pre-coding matrix in a third communication device: the third communications device waveform parameters, estimated by the fourth channel state information communication device, and from the Waveform parameters acquired by the base station and the communication device a first group of channel state information.
[0011]
According to another aspect of the invention, there is provided a base station apparatus in a communication system, the base station apparatus comprises a processing circuit, the processing circuitry is configured to: based on the first terminal device service by the base station apparatus a first waveform parameters and the waveform parameters determined by the second neighboring base station the second terminal device service by the precoding matrix used by a first terminal device, wherein said first waveform parameter transmitted by the first terminal device For formation of a signal waveform, the second waveform parameter of said second formed signal waveform transmitted by the terminal device concerned.
[0012]
According to another aspect of the invention there is provided a communication device a second set of communication devices, the communication device comprises a first set of communication devices communicate with each other and the second communication device, said second communication device comprises processing circuitry, the processing circuitry is configured to: a first waveform based on the waveform parameters of the second parameter of the first communication device and acquired by the base station from the base station to the terminal device, the first communication by determining precoding matrix used in the device, wherein said forming of said waveform parameter signals transmitted by the first communication device related to a first wave form of the signal waveform parameter sent by the terminal device about the second waveform .
[0013]
According to another aspect of the invention there is provided a communication method in a communication system, the method comprising: obtaining a first waveform parameter of said first terminal station served by a base station; by the base station from the neighboring acquiring second waveform parameters of the second base station the terminal apparatus served by the neighboring base station; and a first pre-determined by the terminal device used by the base station parameter based on the first waveform and the second waveform parameter encoding matrix, wherein said first waveform parameter of said formed signal waveform transmitted by the first terminal device related to the second waveform parameter of said second formed signal waveform transmitted by the terminal device concerned.
[0014]
According to another aspect of the invention there is provided a computer storage medium having a program stored thereon, said program causing a computer to implement a communication method as described above when executed.
BRIEF DESCRIPTION
[0015]
Brief description given to a better understanding of the present invention can be incorporated by reference to the following, in which the same or similar reference numerals in the drawings to refer to the same or like parts. Drawings, together with the following detailed description of the present specification comprises a part of this specification and forming, and serve to further illustrate and explain the principles of the embodiments and advantages of the present invention is preferably present invention. In the drawings:
[0016]
1 schematically shows a block diagram UFMC uplink transmission.
[0017]
FIG 2 schematically illustrates a communication scenario according to a first interference embodiment of the present invention.
[0018]
FIG 3 shows a signaling interaction diagram of the interference cancellation scheme in accordance with a first embodiment of the present invention.
[0019]
FIG 4 schematically illustrates a communication scenario according to the present interference to the second embodiment of the present invention.
[0020]
FIG. 5 shows a signaling interaction diagram of the interference cancellation scheme in accordance with a second embodiment of the present invention.
[0021]
6 schematically shows a communication scenario in accordance with the presence of interference of the third embodiment of the present invention.
[0022]
Figure 7 shows a signaling interaction diagram of the interference cancellation scheme in accordance with a third embodiment of the present invention.
[0023]
Figure 8 shows a block diagram of a schematic configuration of a smart phone as an example of a user device.
[0024]
Figure 9 shows a schematic block diagram of a configuration example of the eNB as a base station.
[0025]
FIG 10 shows a block diagram of a schematic configuration of computer hardware.
detailed description
[0026]
The present invention proposes a new waveform applied to (e.g., based on temporal filtering UFMC, F-OFDM) interference cancellation scheme, an example will be described mainly UFMC embodiment of the present invention. However, it is noted that the embodiment of the present invention is also suitable for conventional multi-carrier waveform, including a cyclic prefix - orthogonal frequency-division multiplexing (Cyclic prefix orthogonal frequency division multiplexing, CP-OFDM), Discrete Fourier transform spread orthogonal frequency-division multiplexing (Discrete Fourier transform spread OFDM, DFT-S-OFDM) and the like.
[0027]
FIG 1 shows a schematic block diagram of a multi-user UFMC uplink transmission. 1, the total sub-carriers are divided into N B subbands, each subband occupying N / B sub-carriers can be assigned one or more sub-band for each user. For the i th band, the length of N B of the frequency domain signals X- i through N-point inverse fast Fourier transform (IFFT) is transformed into the time domain. After the IFFT, for each subband, the time domain signal after a length L filter, then transmitted to the receiving end through a radio channel filtered signal.
[0028]
At the receiving end, the received signal is first pre-processing on the time domain, for example, be carried out frequency offset compensation by rotating the phase of the continuous time domain. Further, a received signal zero padding operation, a 2N-point for subsequent Fast Fourier Transform (FFT), FFT for transforming a time domain signal to the frequency domain. Demodulating after FFT. Since a total of N subcarriers transmitting end, the receiving end an FFT 2N points, so the correspondence relationship in the frequency domain, the frequency domain signal receiving end only carries useful information on even-numbered subcarriers. Therefore, demodulation, using the information on the even subcarriers to recover the information sent on the N subcarriers end.
[0029]
FIG 2 shows a scene in the presence of interference between the embodiments within the cell coverage of D2D user equipment group according to the first embodiment of the present invention, wherein the user equipment and the user equipment i1 i2 is a set of user equipment D2D communications user equipment j1 j2 user equipment and another set of user equipments is D2D communication. These two sets of user equipment is located within the coverage area of ​​base station 1, and operating in the same frequency band, there is mutual interference. FIG 2 shows in solid lines a communication link between each user equipment, shown in phantom interference link between two user equipment. Hereinafter, assume that the user equipment i1 and j1 user equipment is transmitting device, a user equipment and the user equipment i2 j2 receiving apparatus.
[0030]
IFFT transformation matrix defined W (N) is
[0031]
[0032]
Wherein, N is the size of IFFT transformation.
[0033]
In addition, the frequency offset matrix is ​​defined as:
[0034]
[0035]
Wherein, [epsilon] i, j represents the j-th frequency offset between the user and the i-th user.
[0036]
Suppose herein each resource block has sub-carriers. Accordingly the received signal in the frequency domain, FIG i2 user equipment and the user equipment shown in j2 2, respectively, can be expressed as:
[0037]
[0038]
[0039]
Wherein, X- (m) = [X- (m) (0), X- (m) (. 1), ..., X- (m) (N . 1 -1)] T represents the m-th frequency domain signal of the user equipment transmitted, For example in the above equation X i1 and X j1 denote frequency domain signal of the user equipment and the user equipment i1 j1 transmitted. Also, [·] T denotes a transpose; [·] H denotes a conjugate transpose; represents N matrix is taken before an element row; F. M represents filter (shown in FIG. 1 in a first user equipment used m Toeplitz filter length L) of the coefficients constituting the matrix size of the matrix is (N + L the FIR -1) × N, and the first row is [F m (0), F m (. 1), ..., F m (L the FIR -1), 0, ..., 0] T , where L the FIR represents a length of the filter; H m, n is a Toeplitz matrix to the m-th coefficient of the channel configuration of the user equipment from the n-th user equipment, the size of the matrix is (N + L the FIR + L CH -2) × (L + N the FIR -1), and the first column [H m, n- (0), H m, n- (. 1), ..., H m, n- (L CH -1) , 0, ..., 0] T , where L CH represents a channel length; is zero-padded matrix, which is a rank L + N the FIR + L CH -2 identity matrix; the Z I2 and the Z J2 for the noise component. In Equation (3) and (4), the symbols represent the definition, so that the longer the expression of a more concise notation. The symbol As shown in Equation (3) and (4), defines a channel matrix which are all 2N . 1 × N . 1 matrix. Channel matrix respectively reflect characteristics of the transmission channel j2 user equipment to user equipment the user equipment i1 i2, j1 user equipment to user equipment i2, i1 the user equipment to the user equipment j2, j1 to the user equipment.
[0040]
Incidentally, in UFMC system, it introduced for each subband filter, which determines the waveform of the transmitted signal. It is considered that the equation (3) and the filter coefficient (4) of the matrix F represents the waveform parameters related to the formation of the signal waveform. However, the waveform parameters of the invention are not limited to the discussed matrix F, a other systems (e.g., F-OFDM), the waveform parameters can have various forms.
[0041]
As described above, in UFMC system, the receiving end after the signal through the 2N-point FFT into the frequency domain, carry useful information only on even-numbered subcarriers, thus defining the equivalent channel matrix as follows:
[0042]
[0043]
Wherein, (. 1: 2: 2N . 1 , :) represents a matrix at equal intervals taken N1 rows.
[0044]
In order to eliminate the interference between the two D2D user equipment shown in FIG. 2, the present invention proposes to eliminate the interference based precoding method. So P i1 and P j1 denote frequency-domain pre-coding matrix user equipment i1 and j1 used by the user equipment.
[0045]
First, the vector space G i2, i1 P i1 be the vector space G i2, j1 P j1 orthogonal, so that the user equipment for i2, the signal (desired signal) from the user equipment will i1 j1 with a signal from a user equipment (interference signal) quadrature. Thus obtained vector space P I1 of the vector space (G I2, I1 ) H G I2, J1 P J1 orthogonal, where (·) H denotes conjugate transpose.
[0046]
Secondly, the vector space G j2, i1 P i1 should vector space G j2, j1 P j1 orthogonal, such that j2 for the user equipment, the signal (interfering signal) from a user equipment will signal i1 from the user's device j1 (useful signal) quadrature. Thus obtained vector space P J1 and vector space (G J2, I1 ) H G J2, J1 P J1 orthogonal.
[0047]
Thus, (G I2, I1 ) H G I2, J1 P J1 vector space configuration and (G J2, I1 ) H G J2, J1 P J1 vector space composed of the same space, can be obtained:
[0048]
[0049]
Wherein, G defined j1, orth is N . 1 × N . 1 matrix. In order to make the interference between the two groups may be eliminated user equipment, the user equipment j1 frequency domain precoding matrix P j1 by the matrix G j1, Orth of N . 1 /2 feature vectors constituted. In a similar manner the user equipment can be obtained i1 precoding matrix P i1 .
[0050]
Obtaining a frequency-domain pre-coding matrix P i1 and P j1 after the signal from the user equipment and the user equipment i1 j1 transmitted can be expressed as:
[0051]
X i1＝P i1S i1 --(7)
[0052]
X j1 = P j1 S j1 - (8)
[0053]
Wherein, S i1 and S j1 is a frequency domain vector of the user equipment information i1 and j1 of the user equipment.
[0054]
Seen from the above, the process of calculating the frequency domain precoding matrix in consideration of the waveform parameters (e.g., filter coefficient matrix F.), The thus calculated pre-coding matrix can be adapted to the characteristics of the new waveform. The transmit end of a precoding matrix such pre-coding can be such that the desired signal and the interference signal space orthogonal to each other in order to achieve the effect of interference cancellation.
[0055]
FIG 3 illustrates a signaling interaction eliminate interference between the two groups of user equipment scenario shown in FIG. 2 scheme. In FIG. 3, the user equipment is also assumed i1, j1 is a transmitting device, a user equipment i2, j2 to the receiving device.
[0056]
3, transmitted in step S300, the user equipment i1, i2 and a user equipment j1, j2 D2D communication request to the base station, and also reports its location information to the base station.
[0057]
In step S310, the base station agreed D2D communication request to two groups of user equipment indication and spectrum resources to individual user equipment assigned in step S320. For example, spectrum resources for saving considerations, or at limited spectrum resources, the base station may be the same spectrum resource groups allocated to the user equipment. In this case, the base station instructs the user equipment to perform these two sets of interference cancellation.
[0058]
In response to an indication of the base station, the user equipment and the user equipment i1 j1 in step S330 own waveform parameters to the base station. The user equipment determines the waveform parameters i1, j1 are formed signal waveform transmitted, for example, and may include one or more of: a multi-carrier filter types, filter length, the filter band attenuation, FFT \ IFFT transform the length of the carrier spacing, number of data streams transmitted in parallel, the length discrete Fourier transform (DFT) spread.
[0059]
Subsequently, at step S340, the user equipment transmits a training sequence i1, i2 for the user equipment and the user equipment j2 estimating channel state from the user's device i1. Similarly, the user equipment transmits a training sequence j1, i2 for the user equipment and the user equipment estimates the channel j2 j1 from the user's.
[0060]
I2 user equipment estimates the channel state information from the user equipment according to i1 and j1 training sequence from the user equipment i1 and j1 received, and the estimated channel state information to the base station. Likewise, the user equipment j2 estimated channel state information from the user equipment i1 and j1 according to the received training sequence and the estimated channel state information to the base station, as shown in step S350.
[0061]
In step S360 the base station about a group information of the user apparatus notifies the user equipment of the other group. Specifically, the base station sends the user equipment i1 waveform parameters and a user equipment i2 estimated channel state information to a user equipment j2, and transmits the user equipment j1 waveform parameters and user j2 estimated channel state information to a user equipment i2 .
[0062]
Thus, as the user equipment j2 receiving apparatus can obtain parameters of the transmission device and a reception waveform i1 i2 apparatus another set of estimated channel state information from the base station, i.e., to obtain the equation (3) and (4) matrix F. I1 and a matrix H I2, I1 and H I2, J1 . Further, the user equipment itself j2 through the channel estimation can be performed in equation (3) and (4) in the matrix H j2, I1 and H j2, J1 . Further, the user equipment may be pre-j2 j1 received from the transmitting apparatus to the same group j1 waveform parameters of the transmission device (not shown), i.e., Equation (3) and a filter matrix F (4) in j1 . It should be noted that the user equipment can obtain its j2 waveform parameters j1 from the user equipment at any time after establishing a communication with a user equipment j1. Alternatively, the user equipment may also be obtained j2 waveform parameters of the user equipment from the base station j1.
[0063]
In this case, the user equipment can be j2 according to equation (3) and (4) determining the channel matrix and to determine the equivalent channel matrix according to equation (5), and according to Equation (6) for transmitting a computing device of the same group j1 the precoding matrix P J1 , as shown in step S370. In the same manner, as the user equipment receives i2 apparatus can also be calculated result of the transmission device of the same group i1 precoding matrix P from the base station estimated based on the received information and the channel itself perform i1 .
[0064]
Then, at step S380, the user equipment user equipment i2 and j2 are the calculated frequency-domain pre-coding matrix is ​​fed back to its corresponding user equipment and the user equipment i1 j1 transmitting side. For example, the user equipment user equipment i2 and j2 can precoding matrix index are transmitted to the user equipment and the user equipment i1 j1.
[0065]
Thereafter, the user equipment and the user equipment i1 j1 using the received transmission signal precoding matrix, as shown in step S390.
[0066]
FIG. 4 shows a second embodiment of the present invention there while inter-cell interference and interference scenario D2D user equipment. 4, there are two base stations 1 and cell 2 managed in each base station serving a plurality of user equipment, wherein the user equipment in cell j 1 j and user equipment located in each cell 2 cell the edge region, they use the same time-frequency resources, so there is interference between each other, i.e., inter-cell interference. The user equipment i1 and user equipment i2 is a set of user equipment D2D communication within the cell 1, which used the user equipment j same time frequency resource, the user equipment i1 and user equipment i2 during communication will be from a cell interfering user equipment uplink signal j is 1, i.e., the D2D user equipment interference. Hereinafter, assume that the user equipment is transmitting device i1, i2 user equipment receiving apparatus.
[0067]
During transmission, each resource block has sub-carriers. Therefore, in the frequency domain, the received signal of the base station 1 can be expressed as:
[0068]
[0069]
The base station 2 receives a signal may be represented as:
[0070]
[0071]
The user equipment reception signal i2 can be expressed as:
[0072]
[0073]
Wherein, [epsilon] m, (n, k) represents the frequency offset between the base station and the k m n user equipment in a cell, e.g., [epsilon] . 1, (2, j) represents the j between the user equipment and the base station 21 in the cell frequency offset; [epsilon] (m, P), (n, k) represents the frequency offset between the user equipment and the cell k m n of cell user equipment p, e.g. [epsilon] (. 1, I2), (. 1, J ) represents the frequency offset between the user equipment 1 in the cell 1 i2 user equipment and a cell j. In addition, X- (m, n-) = [X- (m, n-) (0), X- (m, n-) (. 1), ..., X- (m, n-) (N . 1 -1)] T represents a cell in the m frequency-domain signal transmitted by a user equipment n, e.g., X- (1, j) represents the frequency domain signal in a cell j transmitted by user equipment. N1 represents an element of the front row of the matrix is taken. F. (M, n) represents the filter coefficients Toeplitz matrix cell n m a user equipment configured to use, for example, F. (1, j) represents a filter coefficient of the user equipment using a cell j in a matrix. Similarly to the first embodiment, is formed waveform parameters associated matrix F represents the signal waveform, but the waveform parameters of the present invention is not limited thereto. Matrix F (m, n) of size (N + L the FIR -1) × N, and the first row is [F (m, n) (0), F (m, n) (. 1), ..., F (m, n-) (L the FIR -1), 0, ..., 0] T , where L the FIR represents a length of the filter. H m, (n, k) is the Toeplitz matrix of the channel coefficients consisting of the cell n, the user equipment k to the base station m, e.g., H . 1, (2, j) represents a user equipment j in cell 2 to the base station 1 channel coefficient matrix, the matrix size is (N + L the FIR + L CH -2) × (L + N the FIR -1), and the first column [H m, (n-, K) (0), H m, (n-, K) (. 1), ..., H m, (n-, K) (L CH -1), 0, ..., 0] T , where L ch denotes the length of the channel. H (m, p), (n, k) is the Toeplitz matrix of the cell n user equipment k to cell m a user equipment p channel coefficients constituted, for example, H (. 1, I2), (. 1, j) represents the channel coefficient of the user equipment 1 i2 matrix J from the cell 1 to the user equipment cell size of the matrix is (N + L the FIR + L CH -2) × (L + N the FIR -1), and the first as a [H (m, P), (n-, K) (0), H (m, P), (n-, K) (. 1), ..., H (m, P), (n-, K) (L CH -1), 0, ..., 0] T . In addition, a zero-padded matrix, which is a rank L + N the FIR + L CH -2 unit matrix. D . 1 , D 2 , and D . 3 is a noise component. symbol Means that the definition, that is, the equation (9) - the longer the definition of the expression (11) is a channel matrix which are the size of the channel matrix 2N . 1 × N . 1 .
[0074]
Because UFMC system, the receiving end after the signal through the 2N-point FFT into the frequency domain, carry useful information only on even-numbered subcarriers, thus defining the equivalent channel matrix as follows:
[0075]
[0076]
Wherein represents a matrix at equal intervals taken N1 rows.
[0077]
In order to eliminate the interference between the cells 4 shown in FIG interference and cell service user equipment D2D user equipment, the present invention proposes to eliminate the interference based precoding method. So that P (1, j) , P (1, i1) , and P (2, j) represent the user equipment j cell 1, a user equipment i1 and cell cell a user equipment j, frequency-domain pre-coding matrix 2.
[0078]
First, the vector space G 1, (2, J) P (2, J) should vector space G 1, (1, J) P (1, J) orthogonal to the base station 1 is such that, from the cell 2 j user equipment a signal (interference signal) of the user equipment from a cell in a j a signal (desired signal) quadrature. Therefore derived vector space P (. 1, J) and vector space (G . 1, (. 1, J) ) H G . 1, (2, J) P (2, J) orthogonal, where (·) H represents the total conjugate transpose.
[0079]
Secondly, the vector space G 2, (1, J) P (1, J) should vector space G 2, (2, J) P (2, J) orthogonal to the base station 2 is such that, from the cell 1 j user equipment a signal (interference signal) from a user equipment j in cell 2 signal (useful signal) quadrature. Therefore derived vector space P (. 1, J) and vector space (G 2, (. 1, J) ) H G 2, (2, J) P (2, J) orthogonal.
[0080]
Thus, (G 2, (. 1, J) ) H G 2, (2, J) P (2, J) vector space composed and (G . 1, (. 1, J) ) H G . 1, (2, J ) P (2, J) vector space composed of the same space, can be obtained:
[0081]
[0082]
Wherein, G defined by (2, j), orth is N . 1 × N . 1 matrix. In order that the cell j and user equipment interference cell 1 j 2 between the user equipment can be eliminated, the cell of the user equipment 2 j frequency-domain precoding matrix P (2, j) by the matrix G (2, j), orth of N . 1 /2 feature vectors constituted. In a similar manner the cell 1 can be calculated in the user equipment j precoding matrix P (1, j) .
[0083]
On the other hand, in order to eliminate an interference with a user equipment j i2 cell D2D user equipment, shall meet the vector space G (1, i2), (1, j) P (1, j) and the vector space G (1, i2), (1, i1) P (1, i1) orthogonal to that i2 for the user equipment, the user equipment from a cell in a j a signal (interference signal) from a transmission apparatus i1 D2D communication signal (useful signal) quadrature. Can be obtained vector space P (1, i1) and the vector space quadrature, that is, the user equipment 1 i1 cell precoding matrix P (1, i1) corresponding to the null space can be expressed as follows:
[0084]
[0085]
Obtaining a frequency-domain pre-coding matrix P (1, j) , P (1, i1) , and P (2, j) in the following, user equipment j in cell 1, the cell user equipment i1 and cell 12 is signal transmitted by the user equipment j can be expressed as:
[0086]
X (1,j)＝P (1,j)S (1,j) --(15)
[0087]
X (1,i1)＝P (1,i1)S (1,i1) --(16)
[0088]
X (2,j)＝P (2,j)S (2,j) --(17)
[0089]
Wherein, S is the vector of frequency domain information of the user equipment.
[0090]
FIG 5 illustrates a signaling interaction and canceling inter-cell interference D2D user equipment interference in a scenario as shown in FIG. 4 scheme. In FIG. 5, it is assumed D2D communications performed a set of user equipment to transmit the user equipment device i1, i2 of the receiving user equipment device.
[0091]
5, the transmission request to the base 1 D2D communication at step S501, the user equipment i1, i2. In step S502, the base station 1 to the user equipment i1, i2 indicate agreed D2D communication request. Then the location information In step S503, the user equipment i1, i2 j and a user equipment reports the cell 1 to the base station 1 itself, and the user equipment 2 of the cell j report its location to the base station 2. It should be noted that the reporting of location information is not limited to the way shown in FIG. For example, a user equipment i1, i2 may report the location information while transmitting D2D communication request, the user equipment j two cells might also has base station 1 or 2 before the user equipment reports i1, i2 D2D communication request transmitted own location information.
[0092]
Subsequently, after consultation e.g., base stations 1 and 2 may each user equipment to its spectral distribution management resources, and instructs the user equipment to perform interference elimination, as shown in step S504.
[0093]
In step S505, in response to an indication of the base station, the cell 1 user equipment j own waveform parameter reports the base station 1 to the user equipment j in cell 2 to 2 reports waveform parameters the base station, as a transmission side of the D2D communication user equipment i1 to i2 receiving device report on their waveform parameters.
[0094]
In step S506, the user equipment 1 cell j transmits a training sequence, for the base station 1, station 2 and the user equipment from the user i2 estimated state of the cell 1 j channels. Further, the user equipment 2 transmits cell j in the training sequence, estimate the state of the user 2 for 2 from cell j on channel 1 and the base station. Further, the cell 1 also user equipment transmits a training sequence i1, i2 for the user equipment estimate the state of the channel from the user equipment to i1.
[0095]
A channel estimation step S507, the base station 1, the base station and the user equipment 2 i2 based on the received training sequence is performed in. Specifically, 2 each of the estimated state information of the user from the cell 1 j channels and channel user j from the cell 2 of base station 1 and the base station, the user equipment i2 estimates the channel from a user equipment i1 and from cell 1 the channel state information of the user equipment j.
[0096]
Base stations 1 and 2 at step S508 exchange respective estimated channel state information, and exchanging information on the respective waveform j is managed by the user equipment. Specifically, the waveform information of the base station 1 in cell 1 j reported by the user equipment notifies the base station 2, the base station apparatus 2 the waveform information of the user j in the cell 2 to the base station 1 reports.
[0097]
Accordingly, base stations 1 and 2 to obtain equation (9) and (10) of the matrix F and the matrix H, it is possible, and (10) determining the channel matrix according to equation (9) and to determine (12) according to the equation equivalent channel matrix G . 1, (. 1, J) , G . 1, (2, J) , G 2, (. 1, J) , G 2, (2, J) , and (13) obtained according to the equation user equipment cell 1 and cell j precoding matrix P j in the user equipment 2 (1, j) and P (2, j) , as shown in step S509.
[0098]
Then, at step S510, the base station 1 to the user equipment j is obtained for the cell 1 in the precoding matrix P (1, j) to a user equipment a cell j, while transmitting the precoding matrix to the cell i2 in the user equipment 1. The base station 2 in the user equipment j is obtained for cell 2 precoding matrix P (2, j) to the user equipment in cell j 2. For example, base stations 1 and 2 may only transmit a precoding matrix index. Subsequently, the user equipment in cell j 1 j and the user equipment 2 may transmit a signal cell (not shown) using the received precoding matrix.
[0099]
In step S511, the base station transmits a further waveform parameters of the user equipment in a cell j is the cell to user equipment 1 i2. Incidentally, in the present invention, the base station 1 is not limited to the waveform parameters of the user equipment is notified to the user equipment j i2 At this time, but also may be performed before this step, the cell received by the user equipment 1 any time after the waveform parameters j notifies the waveform parameters reported to the user equipment i2.
[0100]
Thus, a user equipment cell i2 obtained matrix F and the matrix H in Equation (11) is, it is possible to determine the channel matrix according to equation (11) and further (12) determining equivalent channel matrix G according to equation (1 , I2), (. 1, J) , G (. 1, I2), (. 1, I1) . Since the base station for cell 1 at step S510 a user equipment j is determined precoding matrix P (1, j) is also notified to the user equipment i2, the user can obtain a user equipment i2 i1 apparatus according to equation (14) It precoding matrix P (. 1, I1) , as shown in step S512.
[0101]
Subsequently, the user equipment precoding matrix P i2 In step S513, the obtained (1, i1) feedback to the user equipment i1. Accordingly, the user device may utilize the received i1 precoding matrix P (. 1, i1) transmits a signal to the user equipment I2 (not shown).
[0102]
FIG 6 shows a scene in accordance with the presence of interference between base stations outside the coverage embodiment D2D communication group of users of the third embodiment of the present invention. 6, the user equipment and the user equipment i1 i2 is a set of user equipment D2D communications user equipment and the user equipment j1 j2 is another group D2D communication device, these two groups of user equipment operating in the same band, thus mutual interference between.
[0103]
Same as the first embodiment, interference between the two groups be present in the user device (D2D) communication in the present embodiment, can be based on the equation (1) - (6), in a manner described in the first embodiment is to the transmitting device (user equipment i1, j1) each user equipment determines a frequency domain pre-coding matrix.
[0104]
Differs from the first embodiment in that the embodiment of the present embodiment, the two user equipment is located outside the coverage area of ​​the base station, the communication station does not exist in the scene, thus signaling interaction is different from the first embodiment.
[0105]
FIG 7 illustrates a signaling interaction eliminate interference between the two groups of user equipment scenario shown in FIG. 6 scheme.
[0106]
As shown in FIG 7, at step S700, the user equipment transmits i1 D2D communication request to the user equipment i2, j1 user equipment transmits the communication request to the user equipment D2D j2.
[0107]
In step S710, the user equipment i2 and j2 agree to the user equipment D2D communication request, and each user equipment and the user equipment i1 j1 assigned spectrum resources.
[0108]
Subsequently, the user equipment and the user equipment i2 j2 mutual notification of the allocated spectrum resources, as shown in step S720. The same considerations user equipment and the user equipment i2 j2 resources allocated spectrum, interference between the two groups at this time the user equipment, the user equipment i2 and j2 user indicating that the user equipment i1 j1 performing interference elimination device and a user equipment.
[0109]
I2 in response to the user equipment and the user equipment j2 indication, the user equipment and the user equipment i1 j1 S730 own waveform parameters are transmitted to the user equipment and the user equipment i2 in step j2.
[0110]
Subsequently, at step S740, the user equipment transmits a training sequence i1, i2 for the user equipment and the user equipment j2 estimating channel state from the user's device i1. Similarly, the user equipment transmits a training sequence j1, i2 for the user equipment and the user equipment estimates the channel j2 j1 from the user's.
[0111]
I2 user equipment estimating a channel state from the user equipment i1 and j1 information from the user equipment according to the training sequence i1 and j1 received. Likewise, the user equipment j2 estimated channel state information from the user equipment i1 and j1 according to the received training sequence, as shown in step S750.
[0112]
I2 user equipment and the user equipment exchange j2 In step S760 the received waveform parameters and the respective estimated channel state information. Channel state information Specifically, the user equipment i2 sends the user equipment i1 waveform parameters and a user equipment i2 estimated channel state information to a user equipment j2, the user equipment j2 The estimated user equipment j1 waveform parameters and a user equipment j2 of to the user equipment i2.
[0113]
Thus, as the user equipment UE receives i2, and j2 device obtained in equation (3) and the matrix F and the matrix H (4), thereby capable of determining the channel matrix H, and to determine an equivalent in accordance with Equation (5) channel matrix G, and according to equation (6) for transmitting a computing device i1, j1 precoding matrix P I1 and P J1 , as shown in step S770.
[0114]
Then, at step S780, the user equipment user equipment i2 and j2 are the calculated frequency-domain pre-coding matrix to a user equipment and the user equipment i1 j1. For example, a user equipment i2 and j2 user equipment may transmit a precoding matrix index. Subsequently, the user equipment and the user equipment i1 j1 in step S790 by using the transmission signal precoding matrix.
[0115]
Above in connection with FIGS. 2 to 7 for the new waveform (e.g. UFMC) based time-domain filtering described interference cancellation scheme according to the present invention, however, the present invention is equally applicable to the conventional waveform. When applied to a conventional waveform, waveform parameter will not be considered. For example, when the CP-OFDM, since there is no, it is possible to replace the filter for each sub-band of the filter coefficient matrix F above as a cyclic prefix plus matrix, add cyclic prefix matrix may be expressed as:
[0116]
[0117]
Wherein, the I N represents a unit matrix of rank N, N CP represents the length of the cyclic prefix.
[0118]
In addition, the precoding matrix calculation scheme and a signaling flow between the device and the same as described above. Accordingly, the present invention can be applied to communication interference scenario with a new waveform to eliminate the conventional waveform coexistence with good backward compatibility.
[0119]
Further, the present invention is also applicable to a hybrid single-carrier technology and multi-carrier technology. To eliminate the interference between the first embodiment of the D2D user equipment as example, assume that the user equipment uses i1 and i2 UFMC, j1 and j2 and the user equipment using the DFT-S-OFDM. The received signal frequency, the user equipment and the user equipment i2 j2 domain can be expressed as:
[0120]
[0121]
[0122]
T where J1 denotes a cyclic prefix added to the matrix, where the cyclic prefix length set L the FIR -1.
[0123]
In addition, X- i1 = P i1 W is (N . 1 ) S i1 , S i1 represents the time i1 user domain information; X- j1 = P j1 W is (N . 1 ) S j1 , S j1 represents the time domain information of the user j1.
[0124]
Then, the precoding matrix may be determined according to the first embodiment P method i1 and P J1 .
[0125]
Above in connection with various embodiments described interference cancellation scheme proposed by the present invention, the program takes into account the future new waveform mobile communication characteristic in determining a precoding matrix in the process, thus using the precoding matrix capable of such a useful signal space and the interference signal space orthogonal to each other, in order to achieve better interference cancellation effects. Furthermore, by the pre-coding process, the present invention also can effectively reduce the interference of different users caused by the frequency offset. Further, the embodiment of the present invention can also be applied to a conventional waveform, and therefore has a good backward compatibility.
[0126]
The present invention can be applied to various products. For example, the above embodiments may include any type of base station in an evolved Node B (eNB), such as a macro eNB, and a small eNB. Small eNB may be smaller than a macro cell covering the cell eNB, such as eNB pico, micro and home eNB (femto) eNB. Instead, the network side device or the base station may also include any other type of base station, such as base transceiver stations and NodeB (BTS). The base station may include: a body configured to control wireless communication (also referred to as base station apparatus); and one or more remote radio heads disposed at different places of the main body (RRH). Further, various types of terminal devices can also be temporarily or semi-persistent perform the base station functions as a work station.
[0127]
On the other hand, a user equipment, for example, the above-described embodiments may be implemented as a communication terminal device (such as a smart phone, a tablet personal computer (PC), a notebook PC, a portable game terminal, a portable / mobile router and dongle type digital camera ) or a vehicle terminal apparatus (such as a car navigation device), may also be implemented to perform a machine to machine (M2M) communication terminal device, also known as machine type communication (MTC) terminal device. In addition, the terminal device or user equipment may also be a wireless communication module on each terminal attached to the terminal (such as a wafer, comprising a single integrated circuit module).
[0128]
The following implemented in conjunction with a smart phone as an example to describe a terminal device or user equipment of FIG.
[0129]
Figure 8 shows a block diagram of a schematic configuration of a smart phone. 8, a smart phone 2500 includes a processor 2501, memory 2502, storage device 2503, an external connection interface 2504, the image pickup device 2506, a sensor 2507, a microphone 2508, an input device 2509, a display device 2510, a speaker 2511, a wireless communication interface 2512, a switch 2515 or more antennas, one or more antennas 2516, bus 2517, a battery 2518 and an auxiliary controller 2519.
[0130]
The processor 2501 may be, for example, (SoC), or on a CPU chip, a smart phone and controls the application layer and the additional layer 2500 function. The memory 2502 includes a RAM and ROM, and stores data and programs executed by the processor 2501. Memory device 2503 may include a storage medium, such as a semiconductor memory and a hard disk. 2504 external connection interface for connecting an external device (such as a memory card, and a universal serial bus (USB) device) 2500 to the smart phone interfaces.
[0131]
Image pickup apparatus 2506 includes an image sensor (such as a charge coupled device (CCD) and complementary metal oxide semiconductor (CMOS)), and generates a captured image. Sensor 2507 may include a set of sensors, such as a measuring sensor, a gyro sensor, a geomagnetic sensor and an acceleration sensor. Microphone input to the smart phone 2508 2500 sound into an audio signal. The input device 2509 comprises, for example, is configured to detect a touch on the screen of the touch sensor device 2510, a keypad, a keyboard, buttons or switches displayed, and receives operation input from a user or information. The display device 2510 includes a screen (such as a liquid crystal display (LCD) and organic light emitting diode (OLED) display), and displays the output image 2500 is a smart phone. The audio output signal is converted from a smart phone 2500 2511 speaker sound.
[0132]
A wireless communication interface 2512 to support any cellular communications scheme (such as LTE and LTE- Advanced), and performs wireless communication. Wireless communication interface 2512 may generally comprise, for example, a processor 2513 and a radio frequency baseband (BB) (RF) circuit 2514. BB processor 2513 may perform, for example, encoding / decoding, modulation / demodulation, and a multiplexing / demultiplexing, and performs various types of signal processing for wireless communication. Meanwhile, RF circuitry 2514 may include, for example, mixers, filters and amplifiers, and to transmit and receive wireless signals via the antenna 2516. Wireless communication interface 2512 may be an integrated thereon BB processor 2513 and an RF circuit chip 2514 of a module. As shown, the wireless communication interface 2512 may include a plurality of processors BB plurality of RF circuits 2513 and 25,148. However, a wireless communication interface 2512 may also include a single processor BB 2513 or 2514 single RF circuit.
[0133]
Further, in addition to a cellular communication scheme, a wireless communication interface 2512 may also support additional types of wireless communication scheme, such as a short-distance wireless communication scheme, a near field communication scheme and wireless local area network (LAN) scheme. In this case, a wireless communication interface 2512 may include a processor 2513 BB for each wireless communication scheme and the RF circuit 2514.
[0134]
Each of the circuits comprises a plurality (e.g. a circuit for different wireless communication schemes) in a wireless communication interface 2512 and switch between antenna connection destination of the antenna switch 2516 in 2515.
[0135]
Each antenna 2516 includes a single or a plurality of antenna elements (such as including a plurality of antenna elements in MIMO antenna), and 2512 for transmitting and receiving wireless signal from the wireless communication interface. As illustrated, a smart phone may include a plurality of antennas 25 008 2516. However, the smart phone 2500 also may include a single antenna 2516.
[0136]
In addition, the smart phone 2500 may include an antenna for wireless communication scheme for each of 2516. In this case, the antenna switch 2515 may be omitted from the configuration of the smartphone 2500.
[0137]
2517 bus processor 2501, memory 2502, storage device 2503, an external connection interface 2504, the image pickup device 2506, a sensor 2507, a microphone 2508, an input device 2509, a display device 2510, a speaker 2511, a wireless communication interface 2512 and an auxiliary controller 2519 each other connection. Battery 2518 supplies power to the respective components of the smart phone 2500 via a feeder, the feeder being partially in the drawing shown as a dashed line. Example, auxiliary controller 2519 operates the smartphone 2500 minimum necessary functions in the sleep mode.
[0138]
Smart phone 2500 shown in FIG. 8, the terminal device may be a transceiver 2512 implemented by the wireless communication interface. The function of each functional unit of the terminal device at least a portion may be implemented by the processor 2501 or 2519 secondary controller. For example, battery power consumption may be reduced by the secondary controller 2518. Processor 2519 performs some of the functions 2501. Further, processor 2501 or controller 2519 may perform secondary functions of each functional unit of the terminal apparatus by performing at least a portion of the memory 2502 or storage device 2503 stores a program.
[0139]
9 with reference to FIGS eNB will be described as an example of a base station implemented.
[0140]
9 illustrates a block diagram of a schematic configuration of the eNB. As shown in FIG. 9, eNB 2300 includes one or more antennas 2310 and base station apparatus 2320. Each base station apparatus 2320 and antenna 2310 may be a cable connected to each other via radio frequency (RF).
[0141]
Each antenna 2310 includes a single or a plurality of antenna elements (such as including a multiple input multiple output (MIMO) antennas in a plurality of antenna elements), and base station apparatus 2320 to transmit and receive wireless signals. As shown in FIG. 9, eNB 2300 can comprise a plurality of antennas 2310. For example, multiple antennas may be compatible with a plurality of frequency bands used by eNB 2300 2310. While FIG. 9 shows an example eNB 2300 comprises a plurality of antennas 2310, but the eNB 2300 may also include a single antenna 2310.
[0142]
The base station apparatus 2320 includes a controller 2321, a memory 2322, a network interface 2323 and a wireless communication interface 2325.
[0143]
The controller 2321 may, for example, CPU or DSP, and operation of the various higher layer of the base station apparatus 2320. For example, the controller 2321 generates packet data according to the data signal processed by the wireless communication interface 2325 and to send the generated packet via the network interface 2323. The controller 2321 may be tied to the data from the baseband processor to generate a plurality of packet bundle, bundling and transmitting the generated packet. The controller 2321 may have a function to execute control logic: the control such as a radio resource control, radio bearer control, mobility management, admission control and scheduling. This control may be incorporated close to the core network node or the eNB performed. The memory 2322 includes a RAM and ROM, and stores programs and various kinds of control performed by the data controller 2321 (such as a list of the terminal, the transmission power data and schedule data).
[0144]
The network interface 2323 for the base station apparatus 2320 is connected to a core network communications interface 2324. The controller 2321 may communicate via the network interface 2323 to the core network node or another eNB. In this case, eNB 2300 and the core network node or the eNB may be connected to each other through the logical interface (such as the S1 interface and the X2 interface). The network interface 2323 may also be a wireless communication interface, or a wired communication interface for the wireless backhaul. If the network interface is a wireless communication interface 2323, compared with the band wireless communication interface 2325, a network interface to a higher-band 2323 may be used for wireless communication.
[0145]
A wireless communication interface 2325 to support any cellular communication protocol (such as Long Term Evolution (LTE) and LTE- Advanced), and via the antenna 2310 is supplied to a terminal located in the cell eNB 2300 wireless connection. Wireless communication interface 2325 may generally comprise, for example, a processor 2326 and an RF circuit BB 2327. BB processor 2326 may perform, for example, encoding / decoding, modulation / demodulation, and a multiplexing / demultiplexing, and performs layer (e.g. L1, medium access control (the MAC), Radio Link Control (RLC) and packet data convergence protocol ( the PDCP)) in various types of signal processing. Instead of the controller 2321, BB processor 2326 may have the above-described part or all of the logic functions. BB processor 2326 may be a memory storing a communication control program, or is configured to execute a program comprising a processor module and associated circuitry. Update to the BB processor 2326 functional changes. The module 2320 may be inserted into the card slot of the base station apparatus or blade. Alternatively, the module may be a chip on a card or blade is mounted. Meanwhile, RF circuitry 2327 may include, for example, mixers, filters and amplifiers, and to transmit and receive wireless signals via the antenna 2310.
[0146]
9, a wireless communication interface 2325 may include a plurality of processors 2326 BB. For example, a plurality of BB processor 2326 may be compatible with a plurality of frequency bands used by eNB 2300. 9, a wireless communication interface 2325 may include a plurality of RF circuits 2327. For example, a plurality of RF circuitry 2327 may be compatible with a plurality of antenna elements. While FIG. 9 shows a wireless communication interface 2325 comprises a plurality of RF circuits 2326 and 2327 processors BB plurality example, the wireless communication interface 2325 may also include a single processor BB 2326 or 2327 single RF circuit.
[0147]
ENB 2300 in FIG. 9, the base station side transceiver device 2325 may be implemented by a wireless communication interface. Function of at least a portion of each unit may be executed by the controller 2321. For example, at least a portion of the controller 2321 may perform functions of each unit by executing a program stored in the memory 2322.
[0148]
In the above embodiment, a series of processes executed by each device or component may be implemented by software, hardware or a combination of software and hardware. Included in the software program may be stored in advance in a storage medium inside or outside each device or set of components. As one example, during the execution of these programs are written into a random access memory (RAM) and executed by a processor (e.g. the CPU), to perform various processes described in the above embodiment.
[0149]
FIG 10 is a block diagram illustrating an exemplary configuration of computer hardware execute the program of the present invention according to a program.
[0150]
In the computer 1000, a central processing unit (CPU) 1001, a read only memory (ROM) 1002 and random access memory (RAM) 1003 are connected to each other by a bus 1004.
[0151]
Input / output interface 1005 is further connected to the bus 1004. Input / output interface 1005 is connected to the following components: an input unit to a keyboard, a mouse, a microphone, or the like 1006; an output to a display unit, a speaker, etc. 1007 formed; a storage unit to a hard disk, a nonvolatile memory or the like 1008; in a network interface card (such as a local area network (LAN) card, modem, etc.) 1009 formed by the communication unit; and a removable media drive 1011 drive 1010, the removable medium 1011 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.
[0152]
In the computer having the above-described structure, CPU 1001 loads the program stored in the storage unit 1008 via the input / output interface 1005 and bus 1004 to the RAM 1003, and executes the program to perform the above process.
[0153]
Programs to be executed may be recorded by the computer (CPU 1001) 1011 on the removable medium as a package medium, the package medium such as magnetic disk (including a flexible disk), optical disc (including compact disk - read only memory (CD-ROM)), digital versatile disc (DVD), etc.), a magneto-optical disk, or a semiconductor memory formed. Moreover, programs to be executed may be via a local area network, such as a computer (CPU 1001), the Internet, digital satellite broadcasting or wired or wireless transmission medium provided.
[0154]
When the removable medium 1011 is mounted in the drive 1010, the input / output interface 1005 installed in the storage unit 1008 via a program. Further, the program may be received by the communication unit 1009, and installed in the storage unit 1008 via a wired or wireless transmission medium. Alternatively, the program can be installed in the ROM 1002 or the storage unit 1008.
[0155]
To the computer executes may be a program to execute the processing according to the sequence described in this specification, or may be performed in parallel or when necessary processing (such as when invoked) to execute a process.
[0156]
Individual devices or units as described herein are merely a logical sense, and not strictly correspond to a physical device or entity. For example, each of the functional units described herein may be implemented by a plurality of physical entities, or a plurality of functional units described herein may be implemented by a single physical entity. Note that in addition, the features described in one embodiment, component, element, step, etc. is not limited to this embodiment, but can also be applied to other embodiments, for example, a particular feature other alternative embodiments, the member , element, step, etc., or in combination therewith.
[0157]
Has been described in detail in conjunction with the above embodiments and technical effects of the invention are shown, but the scope of the present invention is not limited thereto. One of ordinary skill will appreciate that, depending on design requirements and other factors without departing from the principles and spirit of the present invention, various modifications or variations may be made to the embodiments discussed herein. Scope of the invention defined by the appended claims or the equivalents thereof.
[0158]
Further, the present invention may also be configured as follows.
[0159]
An electronic device for performing wireless communication with two communication devices, said electronic device comprising processing circuitry, the processing circuitry is configured to: obtain a first waveform parameters related to the first set of communication devices, the forming a first waveform parameter of a communication signal waveform for the first set of communication devices relating; notification to said first waveform parameter of said second set of communication devices, so that the second set of communication devices can be determining a precoding matrix for communication with the second set of communication devices based on the first waveform parameter.
[0160]
Wherein said first group of communication device sets a first communication device comprises a communication device and a second communication apparatus, the second set of communication devices comprises a third communication device and the fourth communication apparatus, the processing circuit is further configured to : obtaining the first waveform parameters related to the formation of the signal waveform transmitted by the first communication device; the first waveform parameter notification to the fourth communication apparatus, so that the fourth communication device to determining a precoding matrix by using the third communication device based on the first waveform parameter.
[0161]
The processing circuit is further configured to: derive an estimate of the communication device by the second channel state information; and the acquired channel status information notifying the fourth communication device, so that the fourth communication device can be based on the said channel state information to determine a precoding matrix to be used by the third communications device.
[0162]
Wherein the second communication device the estimated channel state information includes: channel state information of a channel between the first communication apparatus and the second communication device, and the third communication device and the second the channel state information of a channel between the communication devices.
[0163]
Wherein the precoding matrix for the signal of the third communication device to be transmitted are precoded, for interference cancellation.
[0164]
The processing circuit is further configured to: obtain a second waveform parameters related to the second set of communication devices, the second waveform signal waveform parameters formed for the second set of communication related to the communication device; said second waveform parameter to notify the first set of communication devices, so that the first set of communication devices can determine a precoding communication with the first set of communication devices based on the second waveform parameter matrix.
[0165]
The processing circuit is further configured to: allocate communication resources to the same two groups of communication devices; and instructing the communication device sets the first report, respectively the second waveform and the waveform parameter parameter.
[0166]
Wherein said first waveform parameter comprises one or more of: a multi-carrier filter types, filter length, the filter band attenuation, a Fast Fourier Transform \ Inverse Fast Fourier Transform (FFT \ IFFT) transform length, carrier spacing, number of data streams transmitted in parallel, the length of the discrete Fourier transform (DFT) spread.
[0167]
Wherein the signal waveform comprises one or more of the following: a multi-carrier common filter (UFMC), having a weighted overlap-add (the WOLA) cyclic prefix - orthogonal frequency-division multiplexing (CP-OFDM), flexible The cyclic prefix - orthogonal frequency-division multiplexing (FCP-OFDM), filtered - orthogonal frequency-division multiplexing (F-OFDM), a cyclic prefix - orthogonal frequency-division multiplexing, a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM).
[0168]
The second communication device a first set of communication devices in a communication system, the communication system comprises a first set of communication devices and a second set of communication devices, the communication device comprises second processing circuitry, the processing circuitry is configured to: based on determining the first set of parameters related to the communication device a first waveform and the second waveform a second set of parameters related communication device for communication with the communication device of the first group precoding matrix, wherein said first waveform parameter of a signal waveform for forming a first set of communication with the communication device related to the second waveform parameter of said second set of communication with a communication device for forming waveform of signals.
[0169]
Wherein said first set of communication devices comprises a first communication device and the second communication device, said second set of communication devices comprises a third communication device and the fourth communication device, the processing circuit is further configured to: based For the formation of the signal waveforms associated with the formation of the first communication device transmits a first signal waveform and waveform parameters of said third communication device and a second transmitted waveform parameters determined by the said pre-coding matrix used by the first communication device.
[0170]
The processing circuit is further configured to: estimate the channel state information of a channel between the first communication apparatus and the second communication device, and between the third communication device and the second communication device estimates the channel state information of a channel.
[0171]
The processing circuit is further configured to: based on channel state information estimated by the processing circuit, and the channel state information estimated by the second set of communication devices in the fourth communication device to the first communication by determining pre-coding matrix devices.
[0172]
The processing circuit is further configured to: based on the determined precoding matrix, to generate a pre-coding matrix index transmitting to the first communication device.
[0173]
Communication method in a communication system, the communication system includes a base, a first set of communication devices by the first communication device and the second communication device consisting of a second and a third set of communication devices by a communication device and a fourth component communication device, the method comprising: reporting to the base station waveform parameters set by the first communication device in a first communication device, and said waveform formation parameter signal waveform transmitted by the first communication device related; estimated by the first set of communication devices in the second communication device to said base station at said second communication device by the channel state information; acquired by the base station device from said first set of communication parameters and waveforms channel state information to the fourth communication apparatus said second set of communication devices; determined by said fourth communication device based on the following pre-coding matrix for the second communication apparatus of the third set of communication devices : the waveform parameters of the third communications device, estimated by the fourth channel state information communication device, and the base station acquired from the first set of communication devices Waveform parameters and channel state information.
[0174]
A communication system, base station apparatus, said base station apparatus comprises a processing circuit, the processing circuitry is configured to: based on a first waveform parameter of the first terminal device service by the base station apparatus and the base station by the neighboring two second waveform parameters determined by the terminal device to the precoding matrix used by a first terminal device, wherein said first waveform parameter of said formed signal waveform transmitted by the first terminal device related to the first two formed waveform parameter signal waveform transmitted by the second terminal device concerned.
[0175]
The processing circuit is further configured to: estimate the channel state information; information based on the estimated channel state information and the channel state estimated by the neighboring base station to determine a precoding matrix by using the first terminal device.
[0176]
Wherein the channel state information processing circuitry includes a channel estimation between the channel state information of a channel between the first terminal device and the base station apparatus, and the second terminal device and the base station apparatus the channel state information.
[0177]
The processing circuit is further configured to: determine a precoding matrix based on the generated pre-coding matrix index to transmit to the first terminal device, wherein the precoding matrix for the first terminal device to be sent precoding signals, for interference cancellation.
[0178]
The processing circuit is further configured to: notify the terminal device the first parameter of the first waveform to the second communication device a set of communication devices by the base station apparatus managed such that the second communication device can be based on the first waveform parameter to determine the precoding matrix by a first set of communication devices by a communication device.
[0179]
The processing circuit is further configured: to the first terminal device and the set of communication with the dispensing device adjacent to the same base station allocates communication resources of the second communication terminal device resources; indicating the type a terminal device reports the first waveform parameter; indicating that the first communication device transmitting the waveform parameters of the first communication device to the second communication device.
[0180]
A second set of communication devices in a communication device, said communication device comprising a first set of communication devices communicate with each other and the second communication device, said communication device comprises a second processing circuitry, the processing circuitry is configured to : waveform parameters based on the second parameter of the first waveform a first communication device and a terminal device by the base station obtained from the base station to determine a precoding matrix used by the first communication device, wherein the forming said waveform parameter signals transmitted by the first communication device related to said first waveform, the second waveform signal is formed waveform parameters transmitted by the terminal device concerned.
[0181]
The processing circuit is further configured to: estimate the channel state information of a channel between the first communication apparatus and the second communication device, and estimating a channel between the terminal device and the second communication device the channel state information.
[0182]
The processing circuit is further configured to: determine a precoding matrix information by using said first communication device based on the estimated channel state.
[0183]
Communication method in a communication system, the method comprising: obtaining a first waveform parameter of said first terminal station served by a base station; by the base station from the neighboring base station to acquire the neighboring base stations and services a second waveform parameter of the second terminal device; by the base station by determining a parameter based on the first waveform and said second waveform parameter of the pre-coding matrix used by the first terminal device, wherein said first wave parameter signal waveform formed by the first terminal device sends related parameters forming the second waveform signal waveform transmitted by the second terminal device concerned.
[0184]
The method further comprising: by the base station estimates channel state information; acquired by the base station from the neighboring base station by the base station estimates channel state information of the neighbor; channel state information based on the estimated by the base station, and the acquired channel status information to determine a precoding matrix by using the first terminal device.
[0185]
The method further comprising: by the base station to the terminal device the first parameter of the first waveform to the second communication device transmits a set of communication devices managed by the base station in; by the second communication device acquiring a third waveform parameter of said first set of communication devices in the communication device, wherein said third waveform parameter of the signal waveform formed first communication device transmitted the relevant; by the second communication device parameter based on the first waveform and the third waveform parameters determined by the precoding matrix used by the first communication device.

WE Claims

[Claim 1]
An electronic device for performing wireless communication with two communication devices, said electronic device comprising processing circuitry, the processing circuitry is configured to: obtain a first waveform parameters related to the first set of communication devices, the forming a first waveform parameter of a communication signal waveform for the first set of communication devices relating; notification to said first waveform parameter of said second set of communication devices, so that the second set of communication devices can be determining a precoding matrix for communication with the second set of communication devices based on the first waveform parameter.
[Claim 2]
The electronic apparatus according to claim 1, wherein said first group of communication device sets a first communication device comprises a communication device and a second communication apparatus, the second set of communication devices comprises a third communication device and the fourth communication apparatus, the processing circuit is further configured to: acquire the first waveform parameters related to the formation of the signal waveform transmitted by the first communication device; said first waveform parameter notification to the fourth communication device , so that the fourth communication device to determine a precoding matrix by using the third communication device based on the first waveform parameter.
[Claim 3]
The electronic apparatus according to claim 2, the processing circuit is further configured to: derive an estimate of the communication device by the second channel state information; and the channel state information of the acquired notification to the fourth communication device to the fourth communication device to the information to determine a precoding matrix by using the third communication device based on the channel state.
[Claim 4]
The channel state information of the electronic apparatus according to claim 3, wherein said second communication device estimates comprises: channel state information of a channel between the first communication apparatus and the second communication device, and the said channel state information of channels between a third communication device and the second communication device.
[Claim 5]
The electronic device according to claim 2 or claim 3, wherein the precoding matrix for the signal of the third communication device to be transmitted are precoded, for interference cancellation.
[Claim 6]
The electronic apparatus according to claim 1, the processing circuit is further configured to: obtain a second waveform parameters related to the second set of communication devices, the second waveform parameter for said second set of communication forming a signal waveform related to a communication device; the second waveform parameter notification to the first set of communication devices, so that the first set of communication devices based on the second waveform parameter can be determined for the communication the precoding matrix of a first set of communication devices.
[Claim 7]
The electronic device according to claim 6, the processing circuit is further configured to: allocate communication resources to the same two groups of communication devices; and instructing the communication device sets respectively the first report of the waveform parameters and said second waveform parameter.
[Claim 8]
The electronic apparatus according to claim 1, wherein said first waveform parameter comprises one or more of: a multi-carrier filter types, filter length, the filter band attenuation, Fast Fourier Transform \ Fast length inverse Fourier transform (FFT \ IFFT) of the carrier spacing, the number of data streams transmitted in parallel, the length of the discrete Fourier transform (DFT) spread.
[Claim 9]
The electronic apparatus according to claim 1, wherein said signal waveform comprises one or more of: a multi-carrier common filter (UFMC), having a weighted overlap-add cyclic prefix (the WOLA) - the orthogonal frequency division multiplexing (CP-OFDM), cyclic prefix flexible - orthogonal frequency-division multiplexing (FCP-OFDM), filtered - orthogonal frequency-division multiplexing (F-OFDM), a cyclic prefix - orthogonal frequency-division multiplexing, dispersion Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM).
[Claim 10]
The second communication device a first set of communication devices in a communication system, the communication system comprises a first set of communication devices and a second set of communication devices, the communication device comprises second processing circuitry, the processing circuitry is configured to: based on determining the first set of parameters related to the communication device a first waveform and the second waveform a second set of parameters related communication device for communication with the communication device of the first group precoding matrix, wherein said first waveform parameter of a signal waveform for forming a first set of communication with the communication device related to the second waveform parameter of said second set of communication with a communication device for forming waveform of signals.
[Claim 11]
The second communication device according to claim 10, wherein said first set of communication devices comprises a first communication device and the second communication device, said second set of communication devices comprises a third communication device and a fourth communication apparatus, the processing circuit is further configured to: based on the formation of the signal waveform relating to the formation of a signal waveform transmitted from the first communication device and a first waveform parameter of said third communication device transmitted the relevant said second waveform parameter, to determine a precoding matrix by using the first communication device.
[Claim 12]
The second communication device according to claim 11, the processing circuit is further configured to: estimate the channel state information of a channel between the first communication apparatus and the second communication device, and said third estimate the channel state information of a channel between the communication device and the second communication device.
[Claim 13]
The second communication device according to claim 12, wherein the processing circuit is further configured to: based on channel state information estimated by the processing circuit, and estimated by the second set of communication devices to a fourth communication device channel state information to determine a precoding matrix by using the first communication device.
[Claim 14]
The second communication device of claim 11 or 13, wherein the processing circuit is further configured to: based on the determined precoding matrix, to generate a pre-coding matrix index transmitting to the first communication device.
[Claim 15]
Communication method in a communication system, the communication system includes a base, a first set of communication devices by the first communication device and the second communication device consisting of a second and a third set of communication devices by a communication device and a fourth component communication device, the method comprising: reporting to the base station waveform parameters set by the first communication device in a first communication device, and said waveform formation parameter signal waveform transmitted by the first communication device related; estimated by the first set of communication devices in the second communication device to said base station at said second communication device by the channel state information; acquired by the base station device from said first set of communication parameters and waveforms channel state information to the fourth communication apparatus said second set of communication devices; determined by said fourth communication device based on the following pre-coding matrix for the second communication apparatus of the third set of communication devices : waveform parameters of said third communication apparatus, estimated by the fourth channel state information communication device, and the base station acquired from the first set of communication provided Preparation of the waveform parameters and channel state information.
[Claim 16]
A communication system, base station apparatus, said base station apparatus comprises a processing circuit, the processing circuitry is configured to: based on a first waveform parameter of the first terminal device service by the base station apparatus and the base station by the neighboring two second waveform parameters determined by the terminal device to the precoding matrix used by a first terminal device, wherein said first waveform parameter of said formed signal waveform transmitted by the first terminal device related to the first two formed waveform parameter signal waveform transmitted by the second terminal device concerned.
[Claim 17]
Based on the estimated channel state information and channel state information estimated by the neighboring base station, determined by the first; estimating channel state information: The base station apparatus according to claim 16, the processing circuit is further configured to precoding matrix used by a terminal device.
[Claim 18]
The base station apparatus according to claim 17, wherein the channel state information processing circuitry includes estimated channel state information of a channel between the first terminal device and the base station apparatus, and the second terminal device the channel state information of the channel between the base station apparatus.
[Claim 19]
The base station apparatus according to claim 16 or 17, the processing circuit is further configured to: determine a precoding matrix based on the generated pre-coding matrix index to transmit to the first terminal device, wherein the precoding matrix precoding signals for the first terminal device to be sent, for interference cancellation.
[Claim 20]
The base station apparatus according to claim 16, the processing circuit is further configured to: notify the terminal device the first parameter of the first waveform to a second set of communication devices managed by the base station apparatus in communication device, such that the second communication device can be based on the first waveform parameter to determine the precoding matrix by a first set of communication devices by a communication device.
[Claim 21]
Communication to the first terminal device and the set of communication with the neighboring base station dispensing device assigned to the second terminal device: a base station apparatus according to claim 20, the processing circuit is further configured to same resource communication resource; indicating that the first terminal device reporting the first waveform parameter; indicating that the first communication device transmitting the waveform parameters of the first communication device to the second communication device.
[Claim 22]
A second set of communication devices in a communication device, said communication device comprising a first set of communication devices communicate with each other and the second communication device, said communication device comprises a second processing circuitry, the processing circuitry is configured to : waveform parameters based on the second parameter of the first waveform a first communication device and a terminal device by the base station obtained from the base station to determine a precoding matrix used by the first communication device, wherein the forming said waveform parameter signals transmitted by the first communication device related to said first waveform, the second waveform signal is formed waveform parameters transmitted by the terminal device concerned.
[Claim 23]
The second communication device according to claim 22, the processing circuit is further configured to: estimate the channel state information of a channel between the first communication apparatus and the second communication device, and estimating the terminal device the channel state information and the second channel between the communication device.
[Claim 24]
A second communication apparatus according to claim 23, the processing circuit is further configured to: determine a precoding matrix information by using said first communication device based on the estimated channel state.
[Claim 25]
Communication method in a communication system, the method comprising: obtaining a first waveform parameter of said first terminal station served by a base station; by the base station from the neighboring base station to acquire the neighboring base stations and services a second waveform parameter of the second terminal device; by the base station by determining a parameter based on the first waveform and said second waveform parameter of the pre-coding matrix used by the first terminal device, wherein said first wave parameter signal waveform formed by the first terminal device sends related parameters forming the second waveform signal waveform transmitted by the second terminal device concerned.
[Claim 26]
The communication method according to claim 25, further comprising: information by the base station estimates the channel state; acquired by the neighboring base station from the base station by the estimated channel state information of the neighbor; by the base station based on the estimated channel state information, and the acquired channel status information to determine a precoding matrix by using the first terminal device.
[Claim 27]
The communication method of claim 25 or claim 26, further comprising: by the base station to the terminal device the first parameter of the first waveform to the second communication transmitted by the communication device of the group managed by the base station apparatus; acquiring a third waveform parameter of the first communication device in the set of communication devices by the second communication device, wherein the signal waveform is formed, the third waveform parameter of the first communication device transmitted For; parameter based on the first waveform and the third waveform parameters determined by the second communication device by the precoding matrix used by the first communication device.