WO2015024159A1 - Procédé, station de base et équipement utilisateur pour transmettre des informations - Google Patents

Procédé, station de base et équipement utilisateur pour transmettre des informations Download PDF

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Publication number
WO2015024159A1
WO2015024159A1 PCT/CN2013/081751 CN2013081751W WO2015024159A1 WO 2015024159 A1 WO2015024159 A1 WO 2015024159A1 CN 2013081751 W CN2013081751 W CN 2013081751W WO 2015024159 A1 WO2015024159 A1 WO 2015024159A1
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WIPO (PCT)
Prior art keywords
codebook
base station
user equipment
information
codeword
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PCT/CN2013/081751
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English (en)
Chinese (zh)
Inventor
张翼
周华
吴建明
丁磊
郭爱煌
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富士通株式会社
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Priority to PCT/CN2013/081751 priority Critical patent/WO2015024159A1/fr
Publication of WO2015024159A1 publication Critical patent/WO2015024159A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link

Definitions

  • the present invention relates to the field of communications, and in particular, to an information transmission method, a base station, and a user equipment for performing downlink precoding using a dual codebook.
  • the Small Cell forms a Femto CelL Pico Celk Micro Cell and a Metro Cell by adding a base station (BS, Base Station) that is smaller than a conventional macro base station to a cellular space, and is arranged in a public space such as a home, a business, a city, and a rural area.
  • BS Base Station
  • Such cells can maximize the use of existing spectrum and increase the capacity and coverage of the system.
  • LOS Line Of Sight
  • the CoMP (Coordinate Multipoint) technology is proposed to effectively improve the performance of cell edge users and improve the average throughput at the cell edge.
  • the CoMP technology is based on the sharing of user data information and channel state information (CSI) by different cooperative base stations, and the interference information originally from neighboring cells is converted into useful information through the cooperation of the inter-cell base stations, which essentially breaks through.
  • the limitation of spectrum efficiency for single-point transmission is also called a distributed antenna system (or virtual MIMO system), and includes the following scenarios: cooperation between sectors within a cell for sector edge users; cooperation between eNodeB and home-eNodeB; base station and relay node cooperation.
  • CoMP can be either the cooperation of inter-cell base stations or the cooperation between multiple transmission points in a cell.
  • MIMO Multiple-input multiple-output
  • the precoding technique is simply a way to improve system performance by utilizing channel information and performing a pre-processing at the transmitting end to adapt to the corresponding channel environment.
  • CoMP can be divided into SU-MIMO and MU-MIMO.
  • the SU-MIMO corresponds to a case where a plurality of base stations in CoMP serve one UE
  • MU-MIMO corresponds to a case where a plurality of base stations serve a plurality of UEs.
  • different services require different MIMO modes. Therefore, supporting dynamic switching between SU-MIMO and MU-MIMO in a dense small cell scenario is a basic requirement.
  • the precoding scheme needs to take into account the performance of both SU-MIMO and MU-MIMO.
  • the solution needs to reconstruct the system model to balance the performance of line-of-sight LOS propagation and non-line-of-sight NLOS propagation.
  • the traditional LTE-A dual codebook design does not consider the channel condition between the cooperative eNodeBs, and thus does not support the performance of CoMP well.
  • multipoint transmission in dense small cell scenarios is more complicated than traditional heterogeneous networks, so it should be ensured that the precoding scheme has lower complexity, and the precoding feedback method should be more flexible.
  • Embodiments of the present invention provide an information transmission method, a base station, and a user equipment.
  • the purpose is to provide a downlink precoding scheme that conforms to the CoMP characteristics of dense small cells, and further improve the overall performance and flexibility of the dense small cells.
  • an information transmission method which uses a dual codebook and is applied to a small cell.
  • the method includes:
  • the base station generates the transmission information by using the dual codebook, where the dual codebook includes a first codebook corresponding to intra-cell information and a second codebook corresponding to inter-cell information;
  • the base station sends the transmission information to a user equipment.
  • an information transmission method which uses a dual codebook and is applied to a dense small cell, and the method includes:
  • the dual codebook includes a first codebook corresponding to intra-cell information and a second corresponding to inter-cell information Codebook.
  • a base station which uses a dual codebook and is applied to a dense small cell, where the base station includes:
  • An information generating unit configured to generate transmission information by using a dual codebook, where the dual codebook includes corresponding to a cell a first codebook of information and a second codebook corresponding to inter-cell information;
  • the information sending unit sends the transmission information to the user equipment.
  • a user equipment which uses a dual codebook and is applied to a dense small cell, where the user equipment includes:
  • the information receiving unit receives the transmission information sent by the base station, where the transmission information is generated by the base station by using a dual codebook; the dual codebook includes a first codebook corresponding to intra-cell information and corresponding to inter-cell information. The second codebook.
  • a communication system including:
  • the base station generates the transmission information by using the dual codebook, and sends the transmission information to the user equipment, where the dual codebook includes a first codebook corresponding to intra-cell information and a second codebook corresponding to inter-cell information;
  • the user equipment receives the transmission information sent by the base station.
  • a computer readable program wherein when the program is executed in a base station, the program causes a computer to execute the information transmission method as described above in the base station.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform an information transmission method as described above in a base station.
  • a computer readable program wherein when the program is executed in a user device, the program causes a computer to execute an information transmission method as described above in the user device.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute an information transmission method as described above in a user equipment.
  • An advantageous effect of the embodiment of the present invention is that, by using a dual codebook including a first codebook corresponding to intra-cell information and a second codebook corresponding to inter-cell information, users in multi-user cooperation in a cell can be reduced or eliminated.
  • Inter-device interference improves the performance of eNodeB cooperation in different cells, implements CoMP transmission in dense small cell scenarios, and improves system transmission rate and throughput.
  • Embodiment 1 is a schematic flow chart of an information transmission method according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of a small cell scenario composed of multiple types of base stations
  • FIG. 3 is a system block diagram of an equivalent baseband of a multi-user MIMO system according to an embodiment of the present invention
  • FIG. 4 is another schematic flowchart of an information transmission method according to Embodiment 1 of the present invention.
  • FIG. 8 is a schematic flowchart of the information transmission method according to Embodiment 2 of the present invention.
  • FIG. 9 is another schematic flowchart of an information transmission method according to Embodiment 2 of the present invention.
  • Figure 10 is a block diagram showing the structure of a base station according to Embodiment 3 of the present invention.
  • Figure 11 is a block diagram showing another structure of a base station according to Embodiment 3 of the present invention.
  • FIG. 12 is a schematic structural diagram of a user equipment according to Embodiment 4 of the present invention.
  • FIG. 13 is a schematic diagram of another configuration of a user equipment according to Embodiment 4 of the present invention.
  • Figure 14 is a block diagram showing the configuration of a communication system according to a fifth embodiment of the present invention.
  • FIG. 1 is a schematic flowchart of an information transmission method according to an embodiment of the present invention. As shown in FIG. 1, the method includes:
  • Step 101 The base station generates the transmission information by using the dual codebook, where the dual codebook includes a first codebook corresponding to the information in the cell and a second codebook corresponding to the inter-cell information.
  • Step 102 The base station sends the transmission information to the user equipment.
  • a dual codebook structure can be used for dense small cells.
  • FIG. 2 is a schematic diagram of a small cell scenario composed of multiple types of base stations, where P represents a Pico Cell and F represents a Femto Cell.
  • 3 is a system block diagram of an equivalent baseband of a multi-user MIMO system according to an embodiment of the present invention. The present invention will be described in detail below by taking the scenes shown in Figs. 2 and 3 as an example.
  • the base station is configured with M transmit antennas
  • ⁇ is sent by the base station to user k.
  • Data, and user data ⁇ is multiplied by a precoding vector for linear precoding before being sent out, and finally multiplexed by the base station
  • the multiplexed M-way data stream is sent to M user equipments, where the corresponding baseband reception signal of the k-th user equipment can be expressed as
  • & is the total transmit power, which is additive white Gaussian noise, which is the k-th user equipment.
  • the matrix and can be modeled as
  • p is the Rice factor, and satisfies 0 ⁇ p ⁇ oc.
  • 1 -fe is the fading component of the channel matrix, and ⁇ obeys the Rayleigh distribution. And can be expressed in the form of Kronecker product, ie
  • Hkr hkwRkt 112 (5)
  • ⁇ ⁇ matrix of the kth user whose distribution obeys ⁇ (0,1) ;
  • the spatial correlation matrix of the Mx M dimension assuming that the mean and correlation matrix of the Rice channel matrix are available at the transmitting end, and can be expressed as
  • the base station generates the transmission information by using the dual codebook in step 101, and the method may include: determining, by the base station, the first codebook according to the SU-MIMO mode or the MU-MIMIO mode; determining the second code according to the adjustment range parameter between the cells. And performing joint precoding using the first codebook and the second codebook to generate transmission information.
  • FIG. 4 is another schematic flowchart of an information transmission method according to an embodiment of the present invention. As shown in FIG. 4, the method includes:
  • Step 401 the base station determines whether the transmission mode is MU-MIMO mode; if it is determined that it is not MU-MIMO mode, step 402 is performed; if it is determined to be MU-MIMO mode, step 403 is performed;
  • Step 402 The base station determines an existing codebook of the LTE as the first codebook.
  • the Rel.8 codebook when the transmission mode is SU-MIMO mode, for example, in the case of 4Tx, the Rel.8 codebook has a lot of SU-MIMO in both the ULA antenna and the DP antenna configuration compared to other codebook designs. Good performance, while the Rel.8 codebook has excellent features (such as ⁇ characteristics, nesting, constraint symbol sets, etc.), This consideration is based on the way in which the Rel.8 codebook is reused.
  • Step 403 The base station receives the codeword number sent by the multiple user equipments and the corresponding correlation coefficient.
  • Step 404 The base station generates the first codebook according to the codeword number and the corresponding correlation coefficient.
  • the base station may generate the first codebook according to the codeword number fed back by the user equipment and the corresponding correlation coefficient.
  • the user equipment may select multiple vectors from the Glassman codebook to form different precoding matrices, and sort according to the sum of the correlation coefficients of the vectors in the precoding matrix; calculate the correlation between the channel vector and each vector of the precoding matrix a value; and using short-term channel feedback to transmit the codeword number most relevant to the channel vector and its corresponding correlation coefficient to the base station.
  • Step 405 The base station determines the second codebook according to the adjustment range parameter between the cells.
  • the base station can adjust the amplitude and phase of the signals received by the user equipment by using the small-scale adjustment as much as possible to maximize the power of the user equipment to receive the signal.
  • the base station may further receive a codeword sequence number sent by the user equipment, where the codeword sequence number is generated by the user equipment according to the amplitude adjustment range parameter and the phase adjustment precision parameter; and the base station generates the second codebook according to the codeword sequence number.
  • Step 406 The base station generates the transmission information by using the dual codebook. For details on how to use the codebook to generate the transmission information, reference may be made to the prior art.
  • Step 407 The base station sends the transmission information to the user equipment.
  • the precoding matrix W 1 ; , ⁇ in the codebook can be formed by selecting K vectors in the M x N t dimensional Grassmann codebook, for the M x N t dimension of Glassman
  • a total of different precoding matrices can be constructed, and the constructed matrix is sorted according to values, and ⁇ is the correlation coefficient of the vectors in the precoding matrix.
  • a precoding matrix is selected to form a codebook, a matrix with a smaller value can be preferentially selected. Because of the precoding matrix with a small value, it will be beneficial to suppress the co-channel interference (CCI) of multi-user equipment.
  • CCI co-channel interference
  • the introduction of Grassmann precoding can provide higher gain for each user equipment, and
  • the correlation of vectors in the Glassman codebook constitutes a non- ⁇ precoding matrix that can effectively suppress CCI, and has better performance than traditional single-user MIMO systems and codebook-based finite-feedback matrix precoding multi-user MIMO systems.
  • the precoding vectors used by each user equipment are not required to be orthogonal to each other, and may have a certain correlation, as long as the correlation between the preferred precoding vectors fed back by each user equipment is less than a certain Pre-set thresholds allow these user devices to be grouped together for multi-user MU-MIMO transmission.
  • a Rice multi-user precoding scheme based on partial instantaneous channel information and channel statistical information may also be considered for the intra-cell codebook W1 of MU-MIMO.
  • the core idea is that according to the above MU-MIMO codebook, it is assumed for simplicity that each user equipment calculates its channel vector and correlation value of each codeword (the codeword can also be selected based on system capacity and SINR), and the feedback and channel vector are the most The associated codeword number and its corresponding correlation value are given to the base station, and the base station estimates each user channel vector by using the constraint maximum likelihood estimation, and finally uses the channel matrix estimated by each user equipment to schedule multiple users for precoding.
  • the base station schedules M user equipments from each user equipment to multiplex the same channel resources in each time slot, then the lx N of the first user equipment , the dimension channel matrix can be rewritten as
  • the second item on the right side is the interference of other user equipments on the current user equipment.
  • the base station can eliminate interference by designing a precoding matrix.
  • a precoding scheme based on the zero-forcing criterion can be considered.
  • the channel matrix defining the selected user associations is
  • s is the subset of users that are scheduled.
  • the precoding vector of the first user equipment can be expressed as Where ⁇ is the kth column of H; (A) + represents the pseudo-inverse operation to A;
  • the receiver-to-noise-noise ratio of the first user equipment can be expressed as
  • each user equipment calculates the correlation value between its channel vector and the codebook element (the codeword can also be selected based on the system capacity and SINR), and uses the short-term channel feedback to correlate the code most relevant to the channel vector.
  • the word number and its corresponding correlation coefficient are fed back to the base station.
  • the feedback information of each user equipment can be determined by the following formula
  • k l, ..., K; the feedback information ⁇ is the codeword number selected by the user equipment k; the phase which is the maximum correlation value; the modulus value of the maximum correlation value.
  • W ⁇ iWw, Ww, ..., ⁇ , ⁇ ⁇ is the above MU-MIMO codebook of dimension N.
  • the Rice fading channel obeys the complex Gaussian distribution CN( ⁇ k , Bk), and its probability density function can be expressed as
  • the base station can select and schedule the cooperative user equipment according to the estimated channel vector and determine its precoding.
  • an optimal set of user equipment can be selected by the scheduling algorithm to maximize the system capacity. Assuming that each time slot of the base station can schedule M user equipments to multiplex the same channel resources from the user equipments, the selected group of user equipments should satisfy
  • the information fed back to the base station by each user equipment in the cell includes the phase and modulus of the codeword number N that best matches the channel vector and its corresponding correlation value, and obviously has a lower feedback overhead.
  • p 0, the Rice fading channel will degenerate into a Rayleigh fading channel, and the feedback overhead of the present invention can be further reduced without affecting the transmission rate of the system.
  • the mean of the fading channel matrix h k can be simplified to
  • the first codebook is regenerated when it is determined to be the MU-MIMO mode, but the present invention is not limited thereto. For example, instead of performing the SU-MIMO mode or the MU-MIMIO mode, the codeword number and the corresponding correlation coefficient sent by the user equipment may be directly received, and the first codebook may be generated according to the codeword number and the corresponding correlation coefficient.
  • a joint precoding matrix formed by joint transmission of multiple base stations on a certain PRB may be expressed as
  • each of ⁇ , cm,..., ⁇ , ⁇ is selected from the intra-cell codebook W1 Precoding matrix;
  • W diagi , 6 is a precoding matrix selected from inter-cell codebook W2.
  • Each constant factor can be regarded as a small scale adjustment factor; / / ⁇ represents a large-scale adjustment factor, A represents the large-scale fading of the user equipment to the first serving base station.
  • the W2 codebook space size can be designed according to the actual CoMP cell environment. If more precise inter-cell adjustment is needed, more groups [ ⁇ ] can be obtained, and more optional precoding matrices are generated, but the feedback overhead is also increased accordingly. .
  • the second codebook is regenerated in the case where it is determined to be the MU-MIMO mode, but the present invention is not limited thereto.
  • the codeword sequence number sent by the user equipment may be directly received, and the second codebook may be generated according to the codeword sequence number.
  • MU-MIMO transmission is constituted by four user equipments in the same cell.
  • BLER block error rate
  • the throughput is calculated and the average value is obtained, and the average service user throughput comparison of MU-MIMO can be obtained.
  • the dense small cell dual codebook structure of the present invention is used, which has better performance than the traditional LTE Rel.8 codebook (LTE downlink codebook).
  • the MU-MIMO performance at 4Tx mainly depends on the precoding of Rank-1 and Rank-2, and the Rank-1 and Rank-2 of the codebook W1 in the small area are equipped with Glassman. The box principle is generated. Compared with the traditional Rel.8 Rank-1 and Rank-2 codebooks, it has better performance support for MU-MIMO.
  • the small interval codebook W2 is more accurate on the basis of W1. Channel information tracking.
  • the dual codebook structure has a more flexible feedback mode than the traditional Rel.8 single codebook structure.
  • the embodiment of the invention provides an information transmission method, which uses a dual codebook and is applied to a dense small cell.
  • the embodiment of the present invention is described from the user equipment side, and the same content as that of Embodiment 1 will not be described again.
  • FIG. 8 is a schematic flowchart of an information transmission method according to an embodiment of the present invention. As shown in FIG. 8, the method includes: Step 801: A user equipment receives transmission information sent by a base station, where the transmission information is generated by a base station by using a dual codebook.
  • the dual codebook includes a first codebook corresponding to intra-cell information and a second codebook corresponding to inter-cell information.
  • FIG. 9 is another schematic flowchart of an information transmission method according to an embodiment of the present invention. As shown in FIG. 9, the method includes:
  • Step 901 The user equipment sends a codeword number and a corresponding correlation coefficient to the base station, so that the base station generates the first codebook according to the codeword number and the corresponding correlation coefficient.
  • the user equipment may select multiple vectors from the Glassman codebook to form different precoding matrices, and sort according to the sum of the correlation coefficients of the vectors in the precoding matrix; calculate the vector of the channel vector and the precoding matrix. Correlation value; and transmitting the codeword number most relevant to the channel vector and its corresponding correlation coefficient to the base station by using short-term channel feedback.
  • Step 902 The user equipment sends a codeword sequence number to the base station, so that the base station generates a second codebook according to the codeword sequence number.
  • the codeword sequence number is generated by the user equipment according to the amplitude adjustment range parameter and the phase adjustment precision parameter.
  • Step 903 The user equipment receives the transmission information sent by the base station, where the transmission information is generated by the base station using the dual codebook.
  • the embodiment of the invention provides a base station, which uses a dual codebook and is applied to a dense small cell.
  • the embodiment of the present invention corresponds to the information transmission method of Embodiment 1, and the same content is not described again.
  • FIG. 10 is a schematic diagram of a structure of a base station according to an embodiment of the present invention.
  • the base station 1000 includes: an information generating unit 1001 and an information sending unit 1002.
  • Other parts of the base station 1000 are not shown in the figures, and reference may be made to the prior art.
  • the information generating unit 1001 generates the transmission information by using the dual codebook; wherein the dual codebook includes a first codebook corresponding to the information in the cell and a second codebook corresponding to the inter-cell information; and the information sending unit 1002 sends the information to the user equipment. transmit information.
  • FIG. 11 is another schematic diagram of a configuration of a base station according to an embodiment of the present invention.
  • the base station 1100 includes: an information generating unit 1001 and an information transmitting unit 1002, as described above.
  • the information generating unit 1001 may specifically include: a first codebook determining unit 1101, a second codebook determining unit 1102, and a joint precoding unit 1103; wherein, the first codebook determining unit 1101 is configured according to the SU-MIMO mode. Or the MU-MIMIO mode determines the first codebook; the second codebook determining unit 1102 determines the second codebook according to the adjustment range parameter between the cells; the joint precoding unit 1103 performs joint precoding by using the first codebook and the second codebook. To generate transmission information. As shown in FIG.
  • the base station 1100 may further include: a mode determining unit 1104, determining whether the transmission mode is a MU-MIMO mode; and the first codebook determining unit 1101 is specifically configured to: when it is determined that the mode is not the MU-MIMO mode, The existing codebook of LTE is determined as the first codebook.
  • the base station 1100 may further include: a first parameter receiving unit 1105, if it is determined to be a MU-MIMO mode, receiving a codeword number sent by a plurality of user equipments and a corresponding correlation coefficient;
  • the determining unit 1101 is further configured to: generate a first codebook according to the codeword number and the corresponding correlation coefficient.
  • the base station 1100 may further include: a signal adjustment unit 1106, which enables the user equipment to receive the amplitude and phase of the plurality of base station signals as closely as possible through small-scale adjustment, so as to maximize the power of the user equipment to receive the signal.
  • a signal adjustment unit 1106 which enables the user equipment to receive the amplitude and phase of the plurality of base station signals as closely as possible through small-scale adjustment, so as to maximize the power of the user equipment to receive the signal.
  • the base station 1100 may further include: a second parameter receiving unit 1107, configured to receive a codeword serial number sent by the user equipment, where the codeword serial number is generated by the user equipment according to the amplitude adjustment range parameter and the phase adjustment precision parameter;
  • the codebook determining unit 1102 is further configured to: generate a second codebook according to the codeword sequence number.
  • FIG. 11 shows a case where the mode judging unit 1104 regenerates the first codebook and the second codebook in the case where it is determined to be the MU-MIMO mode, but the present invention is not limited thereto.
  • the first parameter receiving unit may directly receive the codeword number sent by the user equipment and the corresponding correlation coefficient, and the first codebook determining unit generates the first codebook according to the codeword number and the corresponding correlation coefficient.
  • the second parameter receiving unit directly receives the codeword serial number sent by the user equipment, and the second codebook determining unit generates the second codebook according to the codeword serial number.
  • the embodiment of the invention provides a user equipment, which uses a dual codebook and is applied to a dense small cell.
  • the embodiment of the present invention corresponds to the information transmission method of Embodiment 2, and the same content will not be described again.
  • FIG. 12 is a schematic diagram of a configuration of a user equipment according to an embodiment of the present invention.
  • the user equipment 1200 includes: an information receiving unit 1201. Other parts of the user equipment 1200 that are not shown in the figure may be referred to current technology.
  • the information receiving unit 1201 receives the transmission information sent by the base station, where the transmission information is generated by the base station using the dual codebook; the dual codebook includes the first codebook corresponding to the information in the cell and the second codebook corresponding to the information between the cells. .
  • FIG. 13 is another schematic structural diagram of a user equipment according to an embodiment of the present invention, as shown in FIG.
  • the 1300 includes: an information receiving unit 1201, as described above.
  • the user equipment may further include: a first parameter sending unit 1302, configured to send a codeword number and a corresponding correlation coefficient to the base station, so that the base station generates the first codebook according to the codeword number and the corresponding correlation coefficient.
  • a first parameter sending unit 1302 configured to send a codeword number and a corresponding correlation coefficient to the base station, so that the base station generates the first codebook according to the codeword number and the corresponding correlation coefficient.
  • the user equipment 1300 may further include: a matrix selecting unit 1303 and a correlation value calculating unit 1304; the matrix selecting unit 1303 selects a plurality of vectors from the Glassman codebook to form different precoding matrices, and according to precoding The sum of the correlation coefficients of the vectors in the matrix is sorted; the correlation value calculation unit 1304 calculates a correlation value between the channel vector and each vector of the precoding matrix; and the first parameter transmitting unit 1302 is further configured to: use the short-term channel feedback to compare the channel The vector most relevant codeword number and its corresponding correlation coefficient are sent to the base station.
  • the user equipment 1300 may further include: a second parameter sending unit 1305, configured to send a codeword sequence number to the base station, so that the base station generates a second codebook according to the codeword sequence number; wherein, the codeword sequence number is adjusted by the user equipment according to the amplitude Generated by the range parameter and the phase adjustment accuracy parameter.
  • a second parameter sending unit 1305 configured to send a codeword sequence number to the base station, so that the base station generates a second codebook according to the codeword sequence number; wherein, the codeword sequence number is adjusted by the user equipment according to the amplitude Generated by the range parameter and the phase adjustment accuracy parameter.
  • Embodiments of the present invention provide a communication system that uses a dual codebook and is applied to a dense small cell. The same contents as those of Embodiments 1 to 4 will not be described again.
  • FIG. 14 is a schematic diagram of a configuration of a communication system according to an embodiment of the present invention.
  • the communication system 1400 includes: a base station 1401 and a user equipment 1402.
  • the base station 1401 can form a dense small cell with other base stations, but the present invention is not limited thereto. this.
  • the base station 1401 generates a transmission information by using a dual codebook, and transmits the transmission information to the user equipment;
  • the dual codebook includes a first codebook corresponding to information in the cell and a second codebook corresponding to inter-cell information; and the user equipment 1402 receives the transmission information sent by the base station.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a user equipment, the program causes the computer to execute the information transmission method as described in Embodiment 2 above in the user equipment.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the information transmission method as described in Embodiment 2 above in the user equipment.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a base station, the program causes a computer to execute the information transmission method as described in Embodiment 1 above in the base station.
  • An embodiment of the present invention also provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the information transmission method as described in Embodiment 1 above in a base station.
  • the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, and the like.
  • One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

Conformément à des modes de réalisation, la présente invention concerne un procédé, une station de base et un équipement utilisateur (UE) pour transmettre des informations. Le procédé pour transmettre des informations comprend les opérations suivantes : la station de base génère des informations de transmission avec des livres de codes doubles constitués d'un premier livre de codes correspondant à des informations intra-cellule et un second livre de codes correspondant à des informations inter-cellules; et la station de base transmet les informations de transmission à un UE. Selon les modes de réalisation de la présente invention, un brouillage entre des UE est réduit ou éliminé lorsque multiples utilisateurs dans une cellule coopèrent les uns avec les autres, les performances sont améliorées lorsque des nœuds B évolués (eNB) dans différentes cellules coopèrent les uns avec les autres, une transmission multipoint coordonnée (CoMP) est réalisée dans une scène de petite cellule intensive, et la vitesse et le débit de transmission du système sont accrus.
PCT/CN2013/081751 2013-08-19 2013-08-19 Procédé, station de base et équipement utilisateur pour transmettre des informations WO2015024159A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101969366A (zh) * 2010-09-26 2011-02-09 华中科技大学 用于8发射天线mimo系统的预编码方法
CN102111352A (zh) * 2009-12-23 2011-06-29 中兴通讯股份有限公司 多点协作联合发送网络中的信息反馈方法、装置和系统
CN102130754A (zh) * 2011-03-11 2011-07-20 中兴通讯股份有限公司 一种实现协同预编码的方法和系统
CN103168430A (zh) * 2010-08-16 2013-06-19 三星电子株式会社 用于八根发射天线的码书及使用该码书的多输入多输出通信系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102111352A (zh) * 2009-12-23 2011-06-29 中兴通讯股份有限公司 多点协作联合发送网络中的信息反馈方法、装置和系统
CN103168430A (zh) * 2010-08-16 2013-06-19 三星电子株式会社 用于八根发射天线的码书及使用该码书的多输入多输出通信系统
CN101969366A (zh) * 2010-09-26 2011-02-09 华中科技大学 用于8发射天线mimo系统的预编码方法
CN102130754A (zh) * 2011-03-11 2011-07-20 中兴通讯股份有限公司 一种实现协同预编码的方法和系统

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