WO2017166200A1 - Procédé et dispositif de transmission de données - Google Patents

Procédé et dispositif de transmission de données Download PDF

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Publication number
WO2017166200A1
WO2017166200A1 PCT/CN2016/078108 CN2016078108W WO2017166200A1 WO 2017166200 A1 WO2017166200 A1 WO 2017166200A1 CN 2016078108 W CN2016078108 W CN 2016078108W WO 2017166200 A1 WO2017166200 A1 WO 2017166200A1
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matrix
precoding matrix
data
base station
transmission
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PCT/CN2016/078108
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English (en)
Chinese (zh)
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金帆
汪利标
覃名富
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华为技术有限公司
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Priority to PCT/CN2016/078108 priority Critical patent/WO2017166200A1/fr
Priority to CN201680082985.4A priority patent/CN108886200A/zh
Publication of WO2017166200A1 publication Critical patent/WO2017166200A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method and apparatus.
  • MIMO Multiple Input Multiple Output
  • the rate gain of the traditional single-user MIMO technology depends not only on the number of antennas of the transmitter, but also There are also certain requirements on the number of antennas of the receiver. Since the receiver is limited by its size, it is usually not possible to equip too many antennas, and the gain of single-user MIMO technology is also limited by the wireless channel. When the transmit/receive channel correlation is strong, a higher space division cannot be obtained. Use the gain.
  • multi-user MIMO technology is more applicable.
  • multi-user MIMO technology how to reduce interference between multiple users is a key issue.
  • TDD Time Division Duplex
  • the transmitting end uses the reciprocity of the uplink and downlink channels to acquire downlink channel information, and constructs mutually orthogonal beams to reduce inter-user interference.
  • FDD Frequency Division Duplex
  • the embodiments of the present invention provide a data transmission method and apparatus, which are used to solve the problem that the base station side obtains accurate downlink channel information in the prior art, and the multi-user interference problem is difficult to avoid, which affects the performance of the multi-purpose MIMO.
  • a data transmission method including:
  • the base station selects M user equipment UEs in the cell, at least one of the M UEs is in a beam coverage range with a first downtilt angle, and at least one of the M UEs is in the a beam coverage having a second downtilt angle, wherein the beam having the first downtilt angle belongs to a beam of a first polarization direction of the active antenna system AAS, and the beam having the second downtilt angle belongs to the AAS a beam in a bipolar direction, the number of beams having a first downtilt angle and the number of beams having a second downtilt angle are at least two, and M is a positive integer greater than or equal to 2, and the base station passes the AAS covers the cell;
  • the base station performs data transmission with the M UEs on the same time-frequency resource according to different precoding matrices through the beams corresponding to the M UEs.
  • Another data transmission method including:
  • the base station selects a plurality of user equipment UEs in the cell, where the multiple UEs include a first UE, a second UE, a third UE, and a fourth UE, where the first UE is in a first beam coverage range, The second UE is in the second beam coverage, the third UE is in the third beam coverage, and the fourth UE is in the fourth beam coverage; the first beam and the second beam belong to a beam of the first polarization direction of the active antenna system AAS, the third beam and the fourth beam belong to a beam of the second polarization direction of the AAS; the beam of the first polarization direction has a first downtilt angle The second polarization direction beam has a second downtilt angle, wherein the base station covers the cell by using the AAS;
  • the base station performs data transmission with the first UE by using the first beam, and performs data transmission with the second UE by using the second beam on the same time-frequency resource, and the third beam is used to The third UE performs data transmission, and performs data transmission with the fourth UE by using the fourth beam.
  • a computer readable storage medium wherein executable program code is stored, the program code being used to implement the method of the first aspect or the second aspect.
  • a data transmission apparatus comprising means for performing the method of the first aspect or the second aspect.
  • a base station comprising the apparatus provided by the fourth aspect.
  • a base station including: a transceiver, a processor, and a memory, wherein: the processor reads a program in the memory, performing the first aspect or the second aspect Methods.
  • data of different UEs may be vertically separated by using different precoding.
  • the matrix pre-codes the data of different UEs, so that the data of different UEs can be isolated in the horizontal direction. Since the data of different UEs are effectively isolated in the horizontal and vertical directions, the data transmission is reduced during the user. interference.
  • FIG. 1 is a schematic flowchart of a data transmission method according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic flowchart of a data transmission method according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic structural diagram of an antenna array of the base station according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of four narrow beams formed in an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an optional mapping relationship between four narrow beams formed in an embodiment of the present invention and a dual-polarized antenna in an AAS;
  • FIG. 6 is a schematic flowchart diagram of a data transmission method according to Embodiment 3 of the present invention.
  • FIG. 7 is a schematic diagram of a data transmission apparatus according to Embodiment 4 of the present invention.
  • FIG. 8 is a schematic diagram of a base station according to Embodiment 4 of the present invention.
  • the narrow beams formed in the embodiments of the present invention have a certain degree of spatial isolation.
  • the narrow beams of different terminals can be isolated in the vertical direction by setting different downtilt angles for the antennas in different polarization directions.
  • the narrow beams of different terminals can be isolated in the horizontal direction. Since the narrow beams formed in the embodiment of the present invention have a certain spatial isolation degree, the interference between users can be reduced in the multi-user multiple input multiple output (Multi-user MIMO, MU-MIMO), thereby improving the MU- MIMO performance.
  • Multi-user MIMO Multi-user MIMO
  • MU-MIMO multi-user multiple input multiple output
  • an Active Antenna System is used.
  • AAS is a new type of RF device in wireless communication. It can be defined as the integration of antenna and radio. It can be regarded as the integration of Remote Radio Unit (RRU) and antenna at the physical site. The function of the RRU unit is combined with the function of the antenna. Due to the characteristics of AAS integration, the RF multi-channel technology can be used to control the vertical array of antennas and the array of horizontal arrays, and the antennas in the vertical and horizontal directions can be flexibly controlled to improve the coverage of wireless signals. Quality improves the purpose of network capacity.
  • a data transmission method As shown in FIG. 1, the method includes:
  • the base station selects M user equipment UEs in the cell, where at least one of the M UEs is in a beam coverage range with a first downtilt angle, and at least one UE of the M UEs is in a second downtilt angle.
  • the beam having the first downtilt angle belongs to a beam of a first polarization direction of the active antenna system AAS
  • the beam having the second downtilt angle belongs to a beam of the second polarization direction of the AAS
  • the number of the beam having the first downtilt angle and the beam having the second downtilt angle are at least two
  • M is a positive integer greater than or equal to 2
  • the base station covers the cell by using the AAS.
  • first downtilt angle is greater than or less than the second downtilt angle.
  • the base station performs data transmission with the M UEs by using the beams corresponding to the M UEs according to different precoding matrices on the same time-frequency resource.
  • the data of different UEs can be isolated in the vertical direction, and different precoding matrices are used for different UEs.
  • the data is pre-coded to realize the isolation of data of different UEs in the horizontal direction. Since the data of different UEs are effectively isolated in the horizontal and vertical directions, the interference between users is reduced during data transmission.
  • the following describes the data transmission method provided by the embodiment of the present invention in detail by taking four narrow beams formed by the AAS as an example.
  • the first beam and the second beam belong to a beam in a first polarization direction of the AAS, and the third beam and the fourth beam belong to a beam in a second polarization direction of the AAS;
  • the beam in the direction has a first downtilt angle, and the beam in the second polarization direction has a second downtilt angle.
  • the base station selects multiple user equipments in the cell, where the multiple UEs include the first UE, the second UE, the third UE, and the fourth UE.
  • the first UE is in the first beam coverage area.
  • the second UE is in the second beam coverage, the third UE is in the third beam coverage, and the fourth UE is in the fourth beam coverage, and the base station covers the Community
  • the base station performs data transmission with the first UE by using the first beam, and performs data transmission with the second UE by using the second beam, by using the third beam.
  • the beam performs data transmission with the third UE, and performs data transmission with the fourth UE by using the fourth beam.
  • the first beam and the second beam belong to a beam of a first polarization direction of the AAS
  • the third beam and the fourth beam belong to a beam of the second polarization direction of the AAS
  • the narrow beam has different polarization directions.
  • the data of the first UE, the second UE, the third UE, and the fourth UE are isolated in the vertical direction according to different downtilt angles; on the same time-frequency resource, the first is obtained by using different precoding matrices respectively.
  • the data of the UE, the second UE, the third UE, and the fourth UE are pre-coded, and the data of the first UE, the second UE, the third UE, and the fourth UE are isolated in the horizontal direction, because the first UE The data of the second UE, the third UE, and the fourth UE are effectively isolated in both the horizontal and vertical directions, thereby reducing interference between users during data transmission.
  • a possible implementation manner is: the base station determines whether to enable MU-MIMO transmission on the same time-frequency resource according to the cell load condition in the cell, as follows:
  • the base station performs selection of the multiple UEs when determining that the cell load exceeds a load threshold.
  • the base station starts multiple UEs when determining that the cell load exceeds a load threshold.
  • MU-MIMO transmission on the same time-frequency resource, thereby making full use of time-frequency resources and reducing cell load. If the cell load does not exceed the load threshold, the UE may transmit with different UEs on different time-frequency resources.
  • the base station selects multiple UEs, including:
  • the base station acquires signal strengths of the multiple UEs, where the signal strength may be an Reference Signal Received Power (RSRP) value and a reference signal reception quality of the multiple UEs (Reference Signal) Received Quality, RSRQ), etc., are not limited in the embodiment of the present invention;
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Received Quality
  • the base station selects, according to the correspondence between the signal strength interval and the beam coverage range, the first UE in the first beam coverage, the second UE in the second beam coverage, the third UE in the third beam coverage, and the third The fourth UE within the coverage of the four beams.
  • the different signal strength intervals correspond to different beam coverage ranges, and according to the signal strengths of the multiple UEs, the beam coverage ranges corresponding to the multiple UEs may be determined.
  • the base station determines a precoding matrix corresponding to the multiple UEs according to a correspondence between a beam coverage range and a precoding matrix, where a precoding matrix corresponding to the multiple UEs is a rank in a codebook set.
  • a precoding matrix indicator (PMI) in the codebook set is a precoding matrix with a rank of 2 for precoding matrices of 2, 8, 12, and 15. among them:
  • a precoding matrix with a PMI of 2 is denoted as W 2 , a possible implementation form is
  • a precoding matrix with a PMI of 8 is denoted as W 8 , a possible implementation form is
  • a precoding matrix with a PMI of 12 is denoted as W 12 , a possible implementation form is
  • a precoding matrix with a PMI of 15 is denoted as W 15 , a possible implementation form is
  • the base station sends the PMI of the precoding matrix corresponding to the multiple UEs to the corresponding UE.
  • the base station sends the PMI of the first precoding matrix corresponding to the first UE to the first UE, and sends the PMI of the second precoding matrix corresponding to the second UE to the second UE, and the third UE corresponds to the third UE.
  • the PMI of the precoding matrix is sent to the third UE, and the PMI of the fourth precoding matrix corresponding to the fourth UE is sent to the fourth UE, where the first precoding matrix, the second precoding matrix, the third precoding matrix, and
  • the fourth precoding matrix is a different precoding matrix with a rank of 2 in the codebook set.
  • the multiple UEs report the PMI of the precoding matrix selected by the multiple UEs from the codebook set to the base station based on the channel measurement.
  • the base station after receiving the PMI reported by the multiple UEs, the base station performs the following processing:
  • the base station uses the base station as the multiple The precoding matrix determined by the UE performs precoding processing on the data of the plurality of UEs, respectively.
  • the base station when the base station determines that the precoding matrix corresponding to the PMI reported by the first UE is different from the first precoding matrix determined by the base station for the first UE, the base station adopts a first precoding matrix pair.
  • the data of the first UE is pre-coded; the base station determines that the precoding matrix corresponding to the PMI reported by the second UE and the second precoding matrix determined by the base station for the second UE are not Simultaneously, precoding the data of the second UE by using a second precoding matrix; the base station determining, by the base station, a precoding matrix corresponding to the PMI reported by the third UE, and the base station being the third UE
  • the third precoding matrix is different, the data of the third UE is pre-coded by using a third precoding matrix; the base station determines the precoding matrix corresponding to the PMI reported by the fourth UE.
  • the fourth precoding matrix determined by the base station for the fourth UE is different The fourth pre-coding matrix
  • the specific processing procedure is as follows:
  • the base station performs precoding processing on the data of the first UE according to the first equivalent precoding matrix, where the first equivalent precoding matrix is a matrix obtained by multiplying the first precoding matrix by the first weighting matrix,
  • the first precoding matrix is a precoding matrix with a rank of 2 in the codebook set;
  • the base station maps the pre-coded data to the first beam for transmission.
  • the first equivalent precoding matrix is specifically: According to the obtained first equivalent precoding matrix, the data of the first UE is transmitted on the beam 0; correspondingly, the UE that is considered to be within the coverage of the beam 0 can be measured by using the PMI2.
  • the first equivalent precoding matrix is specifically: According to the obtained first equivalent precoding matrix, the data of the first UE is transmitted on the beam 1; correspondingly, the UE located within the coverage of the beam 1 can be measured by using the PMI 8.
  • the first equivalent precoding matrix is specifically: According to the obtained first equivalent precoding matrix, the data of the first UE is transmitted on the beam 2; correspondingly, the UE located within the coverage of the beam 2 can be measured by using the PMI 12.
  • the first equivalent precoding matrix is specifically: According to the obtained first equivalent precoding matrix, the data of the first UE is transmitted on the beam 3; correspondingly, the UE that is considered to be within the coverage of the beam 3 can be measured by using the PMI 15.
  • the following describes the formation process of the narrow beams, that is, beam 0, beam 1, beam 2, and beam 3, by taking the distribution 2*4 of the antenna array of the AAS of the base station as an example.
  • the antenna array structure of the base station is as shown in FIG. 3.
  • the 8TRX (8-antenna reception/transmission) dual-polarized antenna forms an antenna array of 2 rows and 4 columns.
  • the downtilt angles of the antennas in the two polarization directions are different, specifically: the beam formed by the antennas having the polarization direction of +45 degrees sets the first downtilt angle, such as Setting a small downtilt angle so that the beam formed by the four antennas in the same polarization direction covers the outer circle; the beam formed by the four antennas having the polarization direction of -45 degrees sets the second downtilt angle, such as setting the first A downtilt angle with a large downtilt angle, so that the beam formed by the four antennas in the same polarization direction covers the inner ring.
  • FIG. 4 Show.
  • Beam 0 is the left inner beam
  • beam 1 is the left outer beam
  • beam 2 is the right inner beam
  • beam 3 is the right outer beam.
  • the processing procedure of the base station performing data transmission by using the second beam and the second UE is similar to the processing procedure of the first UE, as follows:
  • the base station performs precoding processing on the data of the second UE according to the second equivalent precoding matrix, and then maps the precoded data to the second beam for transmission, where the second The equivalent precoding matrix is a matrix obtained by multiplying the second precoding matrix by the first weighting matrix, and the second precoding matrix is a precoding matrix of rank 2 in the codebook set.
  • the processing procedure of the base station performing data transmission by using the third beam and the third UE is similar to the processing procedure of the first UE, as follows:
  • the base station performs precoding processing on the data of the third UE according to the third equivalent precoding matrix, and then maps the precoded data to the third beam for transmission, where the third The equivalent precoding matrix is a matrix obtained by multiplying a third precoding matrix and a first weighting matrix, and the third precoding matrix is a precoding matrix with a rank of 2 in the codebook set.
  • the processing procedure of the base station performing data transmission by using the fourth beam and the fourth UE is similar to the processing procedure of the first UE, as follows:
  • the base station performs precoding processing on the data of the fourth UE according to the fourth equivalent precoding matrix, and then maps the precoded data to the fourth beam for transmission, where the fourth The equivalent precoding matrix is a matrix obtained by multiplying a fourth precoding matrix by a set first weighting matrix, and the fourth precoding matrix is a precoding matrix with a rank of 2 in the codebook set.
  • the base station may map the pre-coded data of the multiple UEs to the beams of different polarization directions of the AAS for transmission by using the second weighting matrix.
  • the base station separately performs precoding processed data of the first UE, precoding processed data of the second UE, and precoding processing of the third UE by using a second weighting matrix
  • the data and the pre-coded data of the fourth UE are mapped to the first beam, the second beam, the third beam, and the fourth beam for transmission.
  • the second weighting matrix is a P ⁇ Q-dimensional matrix, and an element having a value of zero in the second weighting matrix and an element having a value other than zero are alternately distributed, wherein P is the AAS including dual polarization.
  • the number of antennas, Q is the number of narrow beams formed. In the embodiment of the present invention, the number of narrow beams formed is 4, that is, Q is 4.
  • the data of the multiple UEs may be mapped to different beams for transmission by using the foregoing second weighting matrix, where the first beam, the second beam, the third beam, and the fourth beam are dual-polarized antennas in the AAS.
  • the mapping relationship between them is shown in Figure 5.
  • the solution provided by the embodiment of the present invention is especially applicable to a high-load scenario.
  • the higher the load the greater the probability of multi-user (MU) pairing, and the average throughput of the cell is significantly increased.
  • the effective gain is derived from the multi-user spatial division multiplexing gain.
  • the solution provided by the embodiment of the present invention can obtain a large spatial multiplexing gain, and by setting different downtilt angles for antennas with different polarization directions, the coverage of the inner and outer rings is isolated, and therefore, the interference between the inner and outer beams is also Smaller.
  • the base station in addition to the data transmission using the four-beam transmission manner described in the foregoing embodiment shown in FIG. 3, the base station may also be used according to a network load condition, such as a resource block (Resource Block, RB).
  • a network load condition such as a resource block (Resource Block, RB).
  • the two-beam transmission method is selected for data transmission.
  • the multiple UEs selected by the base station in the cell include a fifth UE and a sixth UE, where the fifth UE is in a first beam or a second beam coverage, and the sixth UE is in the a third beam or a fourth beam coverage; the first beam and the second beam belong to a beam of a first polarization direction of the active antenna system AAS, and the third beam and the fourth beam belong to the A beam in the second polarization direction of the AAS; the beam in the first polarization direction has a first downtilt angle, and the beam in the second polarization direction has a second downtilt angle.
  • the base station performs data transmission with the fifth UE by using the first beam and the second beam to enhance the signal strength of the fifth UE.
  • the process is as follows:
  • the base station performs precoding processing on the data of the fifth UE according to the fifth equivalent precoding matrix, where the fifth equivalent precoding matrix is the fifth precoding matrix and the set third weight matrix Multiplying the obtained matrix, the fifth precoding matrix is a precoding matrix of rank 2 in the codebook set;
  • the base station maps the pre-coded data to the first beam and the second beam for transmission.
  • the third weighting matrix is:
  • the fifth equivalent precoding matrix is specifically: According to the obtained fifth equivalent precoding matrix, the data of the fifth UE is transmitted on beam 0 and beam 1; correspondingly, UEs located within the coverage of beam 0 and beam 1 can be considered to be measured using PMI2.
  • the fifth equivalent precoding matrix is specifically: According to the obtained fifth equivalent precoding matrix, the data of the fifth UE is transmitted on the beam 0 and the beam 1; correspondingly, the UE located in the coverage of the beam 0 and the beam 1 can be considered to be measured by using the PMI 8.
  • the fifth equivalent precoding matrix is specifically: According to the obtained fifth equivalent precoding matrix, the data of the fifth UE is transmitted on the beam 2 and the beam 3; correspondingly, the UE located in the coverage of the beam 2 and the beam 3 can be regarded as being measured by using the PMI 8.
  • the fifth equivalent precoding matrix is specifically: According to the obtained fifth equivalent precoding matrix, the data of the fifth UE is transmitted on the beam 2 and the beam 3; correspondingly, the UE located in the coverage of the beam 2 and the beam 3 can be regarded as being measured by using the PMI 8.
  • the fifth equivalent precoding matrix not only the data of the fifth UE but also the first beam and the second beam transmission may be acquired, and the third may be acquired.
  • the process of performing data transmission with the sixth UE by using the third beam and the fourth beam by the base station is similar to the processing procedure of the fifth UE, as follows:
  • the base station performs precoding processing on the data of the sixth UE according to the sixth equivalent precoding matrix, and then maps the precoded data to the third beam and the fourth beam for transmission.
  • the sixth equivalent precoding matrix is a matrix obtained by multiplying a sixth precoding matrix and the third weighting matrix, and the sixth precoding matrix is a precoding matrix with a rank of 2 in the codebook set.
  • the base station can flexibly select a four-beam transmission mode and two beam transmissions. Way to transmit data or signaling. For example, when the network load is less than the set threshold, the two-beam transmission mode is selected to transmit data or signaling to avoid the problem of wasted beam resources due to the presence of more idle beams; when the network load is greater than or equal to the set threshold, Four-beam transmission mode is selected to transmit data or signaling to reduce network load.
  • the pre-coded data of the different UEs may be weighted by using a 90° bridge matrix, thereby implementing antennas with different polarization directions. Power sharing. Specifically, when the base station maps data of the multiple UEs to beams of different polarization directions for transmission, the specific processing procedure is as follows:
  • the base station performs weighting processing on the pre-coded data of the multiple UEs according to the set 90° bridge matrix, and maps the weighted processed data to beams of different polarization directions for transmission. .
  • the base station performs precoding processing on the data of the multiple UEs according to the equivalent precoding matrix corresponding to the multiple UEs, so as to map data of the multiple UEs to corresponding antenna ports.
  • the base station performs precoding processing on the data of the multiple UEs according to the equivalent precoding matrix corresponding to the multiple UEs, so as to map data of the multiple UEs to corresponding antenna ports.
  • the data of the virtual beam transform processing of the plurality of UEs is subjected to a first weighting process to make the powers of the antennas of different polarization directions the same; and then, the data of the first weighting process of the plurality of UEs is subjected to power amplification processing;
  • performing, according to the inverse matrix of the 90° bridge matrix performing second weighting processing on the data after the power amplification processing of the multiple UEs; and finally, performing data of the second weighting processing of the multiple UEs, respectively Map to different beams for transmission.
  • the base station performs the first according to the 90° bridge matrix.
  • the pre-coded data of the UE is weighted, and the processed data of the first UE is mapped to the first beam for transmission; according to the 90° bridge matrix, the second UE is used.
  • mapping the processed data of the second UE to the second beam for transmission Performing weighting processing on the pre-coded data, mapping the processed data of the second UE to the second beam for transmission; according to the 90° bridge matrix, for the third UE Performing a weighting process on the pre-coded data, mapping the processed data of the third UE to the third beam for transmission; and, according to the 90° bridge matrix, to the fourth UE
  • the pre-coded data is weighted, and the processed data of the fourth UE is mapped to the fourth beam for transmission.
  • the data of the pre-coded data of the fifth UE and the data of the pre-coded data of the sixth UE are processed by using a 90° bridge matrix, and the foregoing
  • the processing procedure for the first UE in the four-beam transmission mode is similar, and will not be exemplified one by one.
  • Embodiment 3 As shown in FIG. 6, the data transmission of any UE is taken as an example, wherein the data sequence of the UE is s1, and the processing procedure is as follows: the base station adopts an equivalent precoding matrix, and records for The data sequence s1 is pre-coded to map the data sequence s1 to different antenna ports. In this embodiment, two antenna ports are taken as an example, which are denoted as p1 and p2. Then, the base station performs pre-coding processing.
  • the data is subjected to virtual beam transformation to map the pre-coded data to antennas of different polarization directions, and different polarization directions are respectively recorded as q1 and q2, wherein the matrix used by the virtual beam transformation is Then, the base station performs the first weighting process on the data after the virtual beam transform processing by using the set 90° bridge matrix, and the obtained sequence is recorded as which is Then, the base station pair Perform power amplification processing and transform using the inverse matrix of the 90° bridge matrix, and the resulting sequence is recorded as Finally, the base station will Map to beam A or beam B for transmission.
  • the 90° bridge matrix is a U matrix, then Therefore, all precoding matrices with a rank of 2 in the codebook set are polled. After that, the powers of the antennas with different polarization directions can be equal, that is,
  • the power equalization is achieved regardless of the form of the precoding matrix.
  • the precoding matrix is [1 1] T and [1 -1] T
  • the power of the antennas in the two polarization directions is completely Focused on one polarization direction
  • the precoding matrix is [1 j] T and [1 -j] T
  • the antennas of the two polarization directions can share power, so the weighting by the bridge matrix can The power between the antennas in different polarization directions is shared.
  • the AAS includes eight dual-polarized antennas as an example.
  • the number of dual-polarized antennas included in the AAS is not limited, and other numbers of dual-polarized antennas are used.
  • the processing of the data transmission is similar to the embodiment of the present invention, and is not illustrated here.
  • the above method processing flow can be implemented by a software program, which can be stored in the storage medium.
  • a software program which can be stored in the storage medium.
  • the above method steps are performed.
  • a data transmission apparatus includes: a selection module 71 and a processing module 72, wherein the selection module 71 and the processing Module 72 may perform the embodiment illustrated in FIG. 1, the embodiment illustrated in FIG. 2, or the method described in the embodiment illustrated in FIG. 6.
  • the data transmission device provided by the embodiment of the present invention will be described below by taking the method described in the embodiment shown in FIG. 2 by the selection module 71 and the processing module 72 as an example. details as follows:
  • a selection module 71 configured to select a plurality of user equipment UEs in a cell, where the multiple UEs include a first UE, a second UE, a third UE, and a fourth UE, where the first UE is in a first beam coverage In the range, the second UE is in the second beam coverage, the third UE is in the third beam coverage, and the fourth UE is in the fourth beam coverage; the first beam and the The second beam belongs to a beam in a first polarization direction of the active antenna system AAS, and the third beam and the fourth beam belong to a beam in a second polarization direction of the AAS; the beam in the first polarization direction Having a first downtilt angle, the beam of the second polarization direction having a second downtilt angle, wherein the device covers the cell through the AAS;
  • the processing module 72 is configured to perform data transmission with the first UE by using the first beam, and perform data transmission with the second UE by using the second beam, by using the first beam.
  • the three beams perform data transmission with the third UE, and perform data transmission with the fourth UE by using the fourth beam.
  • the selecting module 71 is specifically configured to:
  • the multiple UEs are selected.
  • the selecting module 71 is specifically configured to:
  • the first UE in the first beam coverage the second UE in the second beam coverage, and the third in the third beam coverage range.
  • the apparatus provided by the embodiment of the present invention further includes: an acquiring module, configured to acquire signal strengths of the multiple UEs, for example, the acquiring module separately collects statistics, where the multiple UEs are in the first beam, the second beam, and the first The uplink RSRP (UL RSRP) value of the Sounding Reference Signal (SRS) on the three beams and the fourth beam.
  • an acquiring module configured to acquire signal strengths of the multiple UEs, for example, the acquiring module separately collects statistics, where the multiple UEs are in the first beam, the second beam, and the first The uplink RSRP (UL RSRP) value of the Sounding Reference Signal (SRS) on the three beams and the fourth beam.
  • UL RSRP The uplink RSRP
  • the selecting module 71 acquires the signal strengths of the multiple UEs by using the acquiring module, and determines, according to the signal strengths of the multiple UEs, a signal strength interval to which the signal strengths of the multiple UEs belong; Corresponding relationship between the signal strength interval and the beam coverage range, selecting the first UE in the first beam coverage, the second UE in the second beam coverage, the third UE in the third beam coverage, and the fourth beam coverage The fourth UE within.
  • processing module 72 is specifically configured to:
  • Precoding the data of the first UE according to the first equivalent precoding matrix where the first equivalent precoding matrix is a matrix obtained by multiplying the first precoding matrix by the first weighting matrix, where A precoding matrix is a precoding matrix with a rank of 2 in the codebook set;
  • processing module 72 is specifically configured to:
  • the second equivalent precoding matrix is a matrix obtained by multiplying the second precoding matrix by the first weighting matrix
  • the second precoding matrix is a precoding matrix with a rank of 2 in the codebook set
  • the pre-coded data is mapped onto the second beam for transmission.
  • processing module 72 is specifically configured to:
  • the third equivalent precoding matrix is a matrix obtained by multiplying the third precoding matrix by the first weighting matrix
  • the third precoding matrix is a precoding matrix with a rank of 2 in the codebook set
  • the pre-coded data is mapped onto the third beam for transmission.
  • processing module 72 is specifically configured to:
  • the fourth equivalent precoding matrix is a matrix obtained by multiplying the fourth precoding matrix by the first weighting matrix
  • the fourth precoding matrix is a precoding matrix with a rank of 2 in the codebook set
  • the pre-coded data is mapped onto the fourth beam for transmission.
  • processing module 72 is specifically configured to:
  • the 90° bridge matrix performs weighting processing on the pre-coded data of the third UE, and maps the processed data of the third UE to the third beam for transmission;
  • the 90° bridge matrix performs weighting processing on the pre-coded data of the fourth UE, and maps the processed data of the fourth UE to the fourth beam for transmission.
  • a base station including the apparatus described in the embodiment shown in FIG.
  • a base station in this embodiment may refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface.
  • the base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), this application is not limited.
  • a base station including a transceiver 81, and at least one processor 82 connected to the transceiver 81, wherein:
  • the processor 82 reads the program in the memory 83 and performs the following process:
  • the multiple UEs include a first UE, a second UE, a third UE, and a fourth UE, where the first UE is in a first beam coverage range, where the The second UE is in the second beam coverage, the third UE is in the third beam coverage, and the fourth UE is in the fourth beam coverage; the first beam and the second beam belong to a beam in a first polarization direction of the source antenna system AAS, the third beam and the fourth beam belong to a beam in a second polarization direction of the AAS; the beam in the first polarization direction has a first downtilt angle, The beam in the second polarization direction has a second downtilt angle, wherein the device covers the cell through the AAS;
  • the transceiver 81 is configured to receive and transmit data under the control of the processor 82.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 82 and various circuits of memory represented by memory 83.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 81 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 82 is responsible for managing the bus architecture and general processing, and the memory 83 can store data used by the processor 82 in performing the operations.
  • the specific execution is:
  • the multiple UEs are selected.
  • the specific execution is:
  • the first UE in the first beam coverage the second UE in the second beam coverage, the third UE in the third beam coverage, and the fourth beam coverage.
  • the fourth UE in the range is selected, according to the correspondence between the signal strength interval and the beam coverage range.
  • the processor when the processor performs data transmission with the first UE by using the first beam, the processor specifically performs:
  • Precoding the data of the first UE according to the first equivalent precoding matrix where the first equivalent precoding matrix is a matrix obtained by multiplying the first precoding matrix by the first weighting matrix, where A precoding matrix is a precoding matrix with a rank of 2 in the codebook set;
  • the processor when the processor performs data transmission with the second UE by using the second beam, the processor specifically performs:
  • the second equivalent precoding matrix is a matrix obtained by multiplying the second precoding matrix by the first weighting matrix
  • the second precoding matrix is a precoding matrix with a rank of 2 in the codebook set
  • the pre-coded data is mapped onto the second beam for transmission.
  • the processor when the processor performs data transmission with the third UE by using the third beam, the processor specifically performs:
  • the third equivalent precoding matrix is a matrix obtained by multiplying the third precoding matrix by the first weighting matrix
  • the third precoding matrix is a precoding matrix with a rank of 2 in the codebook set
  • the pre-coded data is mapped onto the third beam for transmission.
  • the processor when the processor performs data transmission with the fourth UE by using the fourth beam, the processor specifically performs:
  • the fourth equivalent precoding matrix is a matrix obtained by multiplying the fourth precoding matrix by the first weighting matrix
  • the fourth precoding matrix is a precoding matrix with a rank of 2 in the codebook set
  • the pre-coded data is mapped onto the fourth beam for transmission.
  • the processor performs data transmission with the first UE by using the first beam, and performs data transmission with the second UE by using the second beam, on the same time-frequency resource.
  • Performing data transmission with the third UE by using the third beam, and performing data transmission with the fourth UE by using the fourth beam specifically performing:
  • the 90° bridge matrix performs weighting processing on the pre-coded data of the third UE, and maps the processed data of the third UE to the third beam for transmission;
  • the 90° bridge matrix performs weighting processing on the pre-coded data of the fourth UE, and maps the processed data of the fourth UE to the fourth beam for transmission.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the present invention is directed to a method, apparatus (system), and computer program according to an embodiment of the present invention.
  • the flow chart and/or block diagram of the product is described. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de transmission de données. Le procédé comprend les étapes suivantes : une station de base sélectionne de multiples équipements utilisateur (UE) dans une cellule, les multiples UE comprenant un premier UE, un deuxième UE, un troisième UE et un quatrième UE, le premier UE étant dans la couverture d'un premier faisceau, le deuxième UE étant dans la couverture d'un deuxième faisceau, le troisième UE étant dans la couverture d'un troisième faisceau et le quatrième UE étant dans la couverture d'un quatrième faisceau ; le premier faisceau et le deuxième faisceau étant des faisceaux dans une première direction de polarisation d'un AAS, et le troisième faisceau et le quatrième faisceau étant des faisceaux dans une seconde direction de polarisation de l'ASS ; les faisceaux dans la première direction de polarisation ayant un premier angle d'inclinaison vers le bas, et les faisceaux dans la seconde direction de polarisation ayant un second angle d'inclinaison vers le bas ; et sur les mêmes ressources temps-fréquence, une transmission de données avec le premier UE est réalisée au moyen du premier faisceau, une transmission de données avec le deuxième UE est réalisée au moyen du deuxième faisceau, une transmission de données avec le troisième UE est réalisée au moyen du troisième faisceau, et une transmission de données avec le quatrième UE est réalisée au moyen du quatrième faisceau.
PCT/CN2016/078108 2016-03-31 2016-03-31 Procédé et dispositif de transmission de données WO2017166200A1 (fr)

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CN201680082985.4A CN108886200A (zh) 2016-03-31 2016-03-31 一种数据传输方法和装置

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CN101459454A (zh) * 2007-12-12 2009-06-17 李群 天线与射频前端的组合结构及其用于多载波通信的方法
CN104051864A (zh) * 2013-03-11 2014-09-17 中国电信股份有限公司 多输入多输出八天线和基站
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