CN114696882A - Beam forming method, device, system and base station - Google Patents

Beam forming method, device, system and base station Download PDF

Info

Publication number
CN114696882A
CN114696882A CN202210338334.4A CN202210338334A CN114696882A CN 114696882 A CN114696882 A CN 114696882A CN 202210338334 A CN202210338334 A CN 202210338334A CN 114696882 A CN114696882 A CN 114696882A
Authority
CN
China
Prior art keywords
csi
beamforming
terminal
weight
pdsch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210338334.4A
Other languages
Chinese (zh)
Inventor
张志荣
魏明烁
郭瀚
谢伟良
胡春雷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Telecom Corp Ltd
Original Assignee
China Telecom Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Telecom Corp Ltd filed Critical China Telecom Corp Ltd
Priority to CN202210338334.4A priority Critical patent/CN114696882A/en
Publication of CN114696882A publication Critical patent/CN114696882A/en
Pending legal-status Critical Current

Links

Images

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
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Quality & Reliability (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The disclosure provides a beamforming method, a beamforming device, a beamforming system and a beamforming base station, and relates to the field of mobile communication. The method comprises the following steps: calculating weight of CSI-RS beam forming according to first position information of a terminal, wherein the first position information of the terminal comprises a first uplink arrival angle of SRS-Pos sent by the terminal and a first distance from a base station to the terminal; according to the weight of the CSI-RS wave beam forming, the CSI-RS wave beam after wave beam forming is directed to a terminal; receiving CSI sent by a terminal; calculating the weight of beamforming of the PDSCH according to the CSI and the first position information of the terminal; and carrying out PDSCH beamforming according to the weight of the PDSCH beamforming. According to the method, both CSI-RS and PDSCH beamforming do not depend on a codebook, and FDD NR PDSCH beamforming efficiency is improved, so that the coverage area and throughput of FDD NR are improved.

Description

Beam forming method, device, system and base station
Technical Field
The present disclosure relates to the field of mobile communications, and in particular, to a beamforming method, apparatus, system and base station.
Background
In a TDD (Time Division duplex) NR (New Radio interface) system, Downlink Channel state information can be obtained according to SRS (Sounding Reference Signal) according to reciprocity of uplink and Downlink channels, so as to implement fast beamforming on a PDSCH (Physical Downlink Shared Channel).
In an FDD (Frequency Division duplex) NR system, since uplink and downlink channels do not have reciprocity, downlink Channel State Information cannot be acquired according to SRS, and downlink Channel State Information is acquired only according to CSI-RS (Channel State Information-Reference Signal). Due to the fact that a plurality of CSI-RS wave beams are scanned in a time-sharing mode, the optimal CSI-RS wave beam direction is determined and downlink channel state information is acquired through time-sharing measurement of the plurality of CSI-RS wave beams, and the problems that the PDSCH wave beam forming is slow and the performance is poor exist.
Disclosure of Invention
A technical problem to be solved by the present disclosure is to provide a beamforming method, apparatus, system and base station, which can improve beamforming efficiency.
According to an aspect of the present disclosure, a beamforming method is provided, including: calculating the weight of channel state information reference signal (CSI-RS) beam forming according to first position information of a terminal, wherein the first position information of the terminal comprises a first uplink arrival angle of a channel sounding reference signal (SRS-Pos) sent by the terminal and a first distance from a base station to the terminal; according to the weight of the CSI-RS wave beam forming, the CSI-RS wave beam after wave beam forming is directed to a terminal; receiving CSI sent by a terminal, wherein the CSI is determined according to a CSI-RS after beam forming; calculating the weight of beam forming of a Physical Downlink Shared Channel (PDSCH) according to the CSI and the first position information of the terminal; and carrying out PDSCH beamforming according to the weight of the PDSCH beamforming.
In some embodiments, the first uplink angle of arrival is determined from an optimal beam in SRS-Pos; and a first distance, which is determined according to a mapping relation between the Sounding Reference Signal (SRS) -Reference Signal Received Power (RSRP) and the distance, wherein the SRS-RSRP is the RSRP of the best beam of the SRS-Pos.
In some embodiments, calculating the weight of CSI-RS beamforming according to the first location information of the terminal comprises: and determining the weight of CSI-RS beam forming corresponding to the first position information according to the first corresponding relation between the position information and the weight of CSI-RS beam forming.
In some embodiments, calculating the weight of CSI-RS beamforming according to the first location information of the terminal comprises: determining the phase of the CSI-RS wave beam according to the first uplink arrival angle; and determining the amplitude of the CSI-RS beam according to the first distance.
In some embodiments, calculating the weight of beamforming of the PDSCH according to the CSI and the first location information of the terminal includes: correcting the first position information of the terminal according to the CSI to obtain second position information of the terminal; and calculating the weight of beam forming of the PDSCH according to the second position information of the terminal.
In some embodiments, obtaining the second location information of the terminal comprises: calculating a Precoding Matrix Indicator (PMI) of the PDSCH according to the CSI; correcting the first uplink arrival angle by using the PMI to obtain a second uplink arrival angle; and correcting the first distance according to the Channel Quality Indicator (CQI) in the CSI to obtain a second distance.
In some embodiments, calculating the weight of beamforming of the PDSCH according to the second location information of the terminal includes: and determining the beamforming weight of the PDSCH corresponding to the second position information according to the second corresponding relation between the position information and the beamforming weight of the PDSCH.
In some embodiments, calculating the weight of beamforming of the PDSCH according to the second location information of the terminal includes: determining the phase of the PDSCH wave beam according to the second uplink arrival angle; and determining the amplitude of the PDSCH beam according to the second distance.
According to another aspect of the present disclosure, there is also provided a beamforming apparatus, including: the first weight calculation unit is configured to calculate a weight of channel state information reference signal (CSI-RS) beamforming according to first position information of a terminal, wherein the first position information of the terminal comprises a first uplink arrival angle of a channel sounding reference signal (SRS-Pos) sent by the terminal and a first distance from a base station to the terminal; the beam pointing unit is configured to point the CSI-RS beam after beam forming to the terminal according to the weight of the CSI-RS beam forming; the CSI receiving unit is used for receiving CSI sent by the terminal, and the CSI is determined according to the CSI-RS after the wave beam forming; a second weight calculation unit configured to calculate a weight of beamforming of a Physical Downlink Shared Channel (PDSCH) according to the CSI and first location information of the terminal; and a beam forming unit configured to perform PDSCH beam forming according to a weight of the PDSCH beam forming.
In some embodiments, the first uplink angle of arrival is determined from an optimal beam in SRS-Pos; and determining the first distance according to a mapping relation between Sounding Reference Signal (SRS) -Reference Signal Received Power (RSRP) and the distance, wherein the SRS-RSRP is the RSRP of the best beam of the SRS-Pos.
In some embodiments, the first weight calculation unit is configured to determine the CSI-RS beamformed weights corresponding to the first location information according to a first correspondence of the location information and the CSI-RS beamformed weights.
In some embodiments, the first weight calculation unit is configured to determine the phase of the CSI-RS beam according to the first uplink angle of arrival and to determine the amplitude of the CSI-RS beam according to the first distance.
In some embodiments, the second weight calculation unit is further configured to correct the first location information of the terminal according to the CSI to obtain second location information of the terminal, and calculate the weight of beamforming of the PDSCH according to the second location information of the terminal.
In some embodiments, the second weight calculation unit is further configured to calculate a precoding matrix indicator, PMI, of the PDSCH according to the CSI; correcting the first uplink arrival angle by using the PMI to obtain a second uplink arrival angle; and correcting the first distance according to the Channel Quality Indicator (CQI) in the CSI to obtain a second distance.
In some embodiments, the second weight calculating unit is further configured to determine a beamforming weight of the PDSCH corresponding to the second location information according to a second corresponding relationship between the location information and the beamforming weight of the PDSCH.
In some embodiments, the second weight calculation unit is further configured to determine a phase of the PDSCH beam according to the second uplink angle of arrival and determine an amplitude of the PDSCH beam according to the second distance.
According to another aspect of the present disclosure, there is also provided a beamforming apparatus, including: a memory; and a processor coupled to the memory, the processor configured to perform the beamforming method as described above based on instructions stored in the memory.
According to another aspect of the present disclosure, there is also provided a base station, including: the beam forming device is provided.
According to another aspect of the present disclosure, there is also provided a beamforming system, including: the base station described above; and the terminal is configured to calculate the CSI according to the CSI-RS after the beamforming sent by the base station and report the CSI to the base station.
According to another aspect of the present disclosure, there is also provided a non-transitory computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the beamforming method as described above.
In the embodiment of the disclosure, beam forming of a multi-port CSI-RS and a multi-stream PDSCH is rapidly realized by combining the UL AOA, the Distance and the CSI-RS, the beam forming of the CSI-RS and the PDSCH does not depend on a codebook, and FDD NR PDSCH beam forming efficiency is improved, so that the coverage area and the throughput of FDD NR are improved.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The present disclosure may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
fig. 1 is a flow diagram of some embodiments of a beamforming method of the present disclosure;
fig. 2 is a flow chart illustrating further embodiments of a beamforming method of the present disclosure;
fig. 3 is a schematic of some embodiments of a beamforming system of the present disclosure;
fig. 4 is a schematic structural diagram of some embodiments of a beamforming apparatus of the present disclosure; and
fig. 5 is a schematic structural diagram of another embodiment of the beamforming apparatus according to the present disclosure.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
To make the objects, technical solutions and advantages of the present disclosure more apparent, the present disclosure will be described in further detail below with reference to specific embodiments and the accompanying drawings.
Fig. 1 is a flow chart of some embodiments of the beamforming method of the present disclosure, which are performed by a base station.
In step 110, a CSI-RS beamforming weight is calculated according to first location information of the terminal, where the first location information of the terminal includes a first uplink arrival angle of a SRS-Pos (Sounding Reference Signal-Position) sent by the terminal, and a first distance from the base station to the terminal.
In some embodiments, the relative bearing or Angle between the receiving node and the anchor node is calculated by certain hardware devices (e.g., 5G + base stations) sensing the direction of Arrival of the transmitting node signal (e.g., terminal Uplink SRS-Pos), i.e., UL AOA (Uplink Angle-of-Arrival). The positioning algorithm based on UL AOA has the advantages of low algorithm overhead, high positioning precision and the like.
In some embodiments, the first uplink angle-of-arrival is determined from a best beam in SRS-Pos. The Reference Signal Receiving Power (Reference Signal Receiving Power) of the best beam of the SRS-Pos is measured, and the first Distance is determined according to a mapping relation between the SRS-RSRP and Distance.
In some embodiments, the phase of the CSI-RS beam is determined according to the first uplink angle of arrival, and the amplitude of the CSI-RS beam is determined according to the first distance.
In step 120, the CSI-RS beam after beamforming is directed to the terminal according to the weight of CSI-RS beamforming.
In step 130, the CSI sent by the terminal is received, and the CSI is determined according to the beamformed CSI-RS.
In some embodiments, the terminal calculates CSI according to the received beamformed CSI-RS, and reports the CSI to the base station. CSI generally includes three terms: a CQI (Channel Quality Indicator)/RI (rank indication)/PMI (Precoding Matrix Indicator).
In step 140, a weight for beamforming of the PDSCH is calculated according to the CSI and the first location information of the terminal.
In some embodiments, the first location information of the terminal is corrected according to the CSI to obtain the second location information of the terminal, and the beamforming weight of the PDSCH is calculated according to the second location information of the terminal.
In some embodiments, the PMI of the PDSCH is calculated from the CSI; correcting the first uplink arrival angle by using the PMI to obtain a second uplink arrival angle; and correcting the first distance according to the CQI in the CSI to obtain a second distance.
In some embodiments, the phase of the PDSCH beam is determined from the second uplink angle of arrival and the amplitude of the PDSCH beam is determined from the second distance.
In this step, Distance and UL AOA are corrected through CQI and PMI, and beamforming for the multiflow PDSCH can be accurately achieved in real time.
In step 150, PDSCH beamforming is performed according to the weight of PDSCH beamforming.
In the embodiment, by combining the UL AOA, the Distance and the CSI-RS, the beamforming of the multi-port CSI-RS and the multi-stream PDSCH is quickly realized, the beamforming of the CSI-RS and the PDSCH does not depend on a codebook, the speed and the performance of FDD NR PDSCH beamforming are improved, and the coverage area and the throughput of FDD NR are improved.
Fig. 2 is a flowchart illustrating other embodiments of the beamforming method according to the disclosure.
In step 210, the 5G + base station MIMO (Multi-Input Multi-Output) initialization procedure.
In step 220, the terminal location (UL AOA, Distance) is determined.
In some embodiments, the terminal transmits multi-beam SRS-Pos to the 5G + base station. And the 5G + base station acquires the UL AOA by receiving the optimal beam of the SRS-Pos, wherein the UL AOA comprises an upper azimuth angle A-AoA and an uplink pitch angle Z-AoA. Further, the RSRP of the best beam of the SRS-Pos signal, i.e., SRS-RSRP, is measured, for example, SRS-RSRP ═ 85 dBm. And obtaining Distance according to the mapping relation between the SRS-RSRP and the Distance, and determining the position Positon (UL AOA, Distance) of the terminal in a polar coordinate system.
In some embodiments, after receiving the SRS-Pos signals, the 5G + base station compares SRS-RSRP signals of the beams to determine that the beam corresponding to the strongest SRS-RSRP signal is the best beam. As shown in fig. 3, SRS-Pos beam 2 is the best beam for SRS-Pos.
In step 230, the weight of multi-port CSI-RS beamforming is calculated, and the beamformed CSI-RS beam is directed to the terminal.
In some embodiments, for example, the CSI-RS is an 8-port CSI-RS, and the phase (direction) of the CSI-RS beam is determined according to UL AOA, and the amplitude (length) of the CSI-RS beam is determined according to Distance.
In some embodiments, the terminal location has a first correspondence with the weights of the CSI-RS beamforming. For example, a functional relationship between terminal position Positon (UL AOA, Distance) and weights for CSI-RS beamforming is set. Or designing a database, and storing the mapping relationship between the weight of the CSI-RS beamforming and the position of the terminal postion (UL AOA, Distance) in the database, where the mapping relationship can be obtained by calculation according to a functional relationship or obtained according to measured data of an external field. And calculating or searching the weight of CSI-RS beam forming by using the terminal position Positon (UL AOA, Distance) according to the functional relation or the mapping relation.
In this embodiment, the CSI-RS beams are codebook independent and accurate.
In step 240, the terminal calculates CSI according to the received beamformed CSI-RS, and reports the CSI to the 5G + base station.
In step 250, the 5G + base station calculates the PMI and the number of layers (streams) of the PDSCH based on the received CSI.
In some embodiments, a precoding matrix and a number of layers are calculated, complex information of N layers (layers) is mapped to N antenna ports (antenna ports) through the precoding matrix, and one-to-one correspondence between the number of layers and the number of antenna ports is realized.
In step 260, the beamforming weight of the PDSCH is accurately calculated according to the terminal location and CSI combination, and the beamformed multi-stream PDSCH beam is directed to the terminal.
In some embodiments, the Distance 'is obtained by correcting the Distance with the CQI, for example, by correcting the Distance with the RSRP value of the CSI-RS in the CQI, a more accurate Distance' is obtained. The PMI is used to correct the UL AOA to obtain UL AOA ', for example, the direction (bit) information in the precoding matrix indicated by the PMI is extracted to correct the AOA to obtain more accurate AOA'. Determining the phase (direction) and amplitude (length) of the PDSCH beam through Position ' (UL AOA ', Distance '), and pointing the beamformed multi-stream PDSCH beam to the terminal.
In some embodiments, the terminal location has a second correspondence with the weight of PDSCH beamforming. For example, a functional relationship between the terminal position Positon (UL AOA ', Distance') and the weight of PDSCH beamforming is set. Or designing a database, storing mapping relationship between weight of PDSCH beamforming and Positon (UL AOA ', Distance') of terminal position in the database, wherein the mapping relationship can be obtained by calculation according to functional relationship or by measured data of external field. And calculating or searching the weight of PDSCH beamforming by using the terminal position Positon (UL AOA ', Distance') according to the functional relation or the mapping relation.
With the change of the orientation between the terminal and the base station, the transmission characteristic H of the wireless channel changes, theoretically, the precoding matrix is the inverse matrix of the transmission characteristic matrix, and the PMI is used for correcting the UL AOA. Even if the Position (UL AOA, Distance) of the terminal is changed, the change of the UL AOA and Distance can be corrected, so that the beam pointing of the PDSCH is more accurate in real time. And the PDSCH wave beam does not depend on a codebook, and is more accurate.
In the above embodiment, by combining the UL AOA, Distance and CSI-RS, the flexibility and accuracy of FDD NR PDSCH beamforming are improved, so that the coverage and throughput of FDD NR are improved, the resource utilization rate of the 5G + access network, the spectrum efficiency and the user experience are improved, the technical evolution towards the 5G + direction is facilitated, and the application prospect is wide.
Fig. 4 is a schematic structural diagram of some embodiments of the beamforming apparatus of the present disclosure, which includes a first weight calculating unit 410, a beam directing unit 420, a CSI receiving unit 430, a second weight calculating unit 440, and a beamforming unit 450.
The first weight calculating unit 410 is configured to calculate a weight of CSI-RS beamforming according to first location information of the terminal, where the first location information of the terminal includes a first uplink angle of arrival of the SRS-Pos transmitted by the terminal and a first distance from the base station to the terminal.
In some embodiments, the first uplink angle of arrival is determined according to a best beam in SRS-Pos, and the first distance is determined according to a mapping relation between SRS-RSRP and distance, where SRS-RSRP is RSRP of the best beam of SRS-Pos.
In some embodiments, the UL AOA is acquired by receiving the best beam of the SRS-Pos signal. Further, the position Positon (UL AOA, Distance) of the terminal is determined in the polar coordinate system.
In some embodiments, the first weight calculation unit 410 is configured to determine the CSI-RS beamformed weights corresponding to the first location information according to a first correspondence of the location information and the CSI-RS beamformed weights. The first corresponding relationship includes a functional relationship and a mapping relationship.
In some embodiments, a phase of the CSI-RS beam is determined according to the first uplink angle of arrival, and an amplitude of the CSI-RS beam is determined according to the first distance. The CSI-RS beams in this embodiment are codebook independent and more accurate.
The beam pointing unit 420 is configured to point the beamformed CSI-RS beam to the terminal according to the weights of the CSI-RS beamforming.
CSI receiving unit 430 receives CSI sent by the terminal, and the CSI is determined according to the beamformed CSI-RS.
In some embodiments, the terminal calculates CSI (CQI/RI/PMI) according to the received beamformed CSI-RS, and reports the CSI to the 5G + base station.
The second weight calculation unit 440 is configured to calculate a weight of beamforming of the PDSCH according to the CSI and the first location information of the terminal.
In some embodiments, the first location information of the terminal is corrected according to the CSI to obtain the second location information of the terminal. For example, according to CSI, PMI of PDSCH is calculated; correcting the first uplink arrival angle by using the PMI to obtain a second uplink arrival angle; and correcting the first distance according to the CQI in the CSI to obtain a second distance. The second weight calculation unit 440 is further configured to calculate a weight of beamforming of the PDSCH according to the second location information of the terminal.
In some embodiments, the second weight calculating unit 440 is further configured to determine a beamforming weight of the PDSCH corresponding to the second location information according to a second corresponding relationship between the location information and the beamforming weight of the PDSCH. The second corresponding relationship is, for example, a functional relationship or a mapping relationship.
In some embodiments, the second weight calculation unit 440 is further configured to determine the phase of the PDSCH beam according to the second uplink angle of arrival and the amplitude of the PDSCH beam according to the second distance.
The beamforming unit 450 is configured to perform PDSCH beamforming according to the weight of PDSCH beamforming.
In the above embodiment, by combining the UL AOA, Distance, and CSI-RS, the beamforming speed and performance of FDD NR PDSCH are improved, so that the coverage and throughput of FDD NR are improved, the spectrum efficiency and user experience are improved, technical evolution towards the 5G + direction is facilitated, and a wide application prospect is achieved.
Fig. 5 is a schematic structural diagram of another embodiment of the beamforming apparatus of the present disclosure. The apparatus 500 includes a memory 510 and a processor 520. Wherein: the memory 510 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory is used to store instructions in the embodiments corresponding to fig. 1-3. Processor 520 is coupled to memory 510 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 1020 is configured to execute instructions stored in the memory.
In some embodiments, processor 520 is coupled to memory 510 by a BUS BUS 530. The apparatus 500 may also be connected to an external storage system 550 through a storage interface 540 for calling external data, and may also be connected to a network or another computer system (not shown) through a network interface 560. And will not be described in detail herein.
In this embodiment, the memory stores the data instruction, and the processor processes the instruction, so as to improve the beamforming efficiency.
In other embodiments of the present disclosure, a base station, for example, a 5G base station or a 5G + base station, is protected, and the beamforming apparatus in the above embodiments is included.
In other embodiments of the present disclosure, a beamforming system is further protected, where the beamforming system includes the base station in the above embodiments and a terminal, and the terminal is configured to calculate CSI according to a beamformed CSI-RS sent by the base station, and report the CSI to the base station.
The method and the device effectively solve the problems that due to time-sharing scanning of the CSI-RS wave beam, the downlink channel state information can be obtained only through time-sharing measurement, the forming of the PDSCH wave beam is slow, and the performance is poor, and have strong pertinence to the evolution of a wireless network towards the 5G + direction. In addition, especially for 2.1G FDD NR 8TR, the method greatly improves the completeness of the 5G + access network technical scheme and improves the network performance. In addition, the technical scheme disclosed by the invention is low in implementation complexity and easy for system implementation and scheme popularization.
In other embodiments, a computer-readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the embodiments corresponding to fig. 1-3. As will be appreciated by one of skill in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. Those skilled in the art can now fully appreciate how to implement the teachings disclosed herein, in view of the foregoing description.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be appreciated by those skilled in the art that modifications can be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (20)

1. A method of beamforming, comprising:
calculating weight of channel state information reference signal (CSI-RS) beam forming according to first position information of a terminal, wherein the first position information of the terminal comprises a first uplink arrival angle of a channel sounding reference signal (SRS-Pos) sent by the terminal and a first distance from a base station to the terminal;
according to the weight of the CSI-RS wave beam forming, the CSI-RS wave beam after wave beam forming is directed to the terminal;
receiving CSI sent by the terminal, wherein the CSI is determined according to the CSI-RS after beam forming;
calculating the weight of beam forming of a Physical Downlink Shared Channel (PDSCH) according to the CSI and the first position information of the terminal; and
and carrying out PDSCH beamforming according to the weight of the PDSCH beamforming.
2. The beamforming method according to claim 1,
the first uplink arrival angle is determined according to the optimal wave beam in the SRS-Pos; and
the first distance is determined according to a mapping relation between Sounding Reference Signal (SRS) -Reference Signal Received Power (RSRP) and the distance, wherein the SRS-RSRP is the RSRP of the best beam of the SRS-Pos.
3. The beamforming method according to claim 1, wherein calculating weights for CSI-RS beamforming according to the first location information of the terminal comprises:
and determining the weight of CSI-RS beam forming corresponding to the first position information according to the first corresponding relation between the position information and the weight of CSI-RS beam forming.
4. The beamforming method according to claim 1, wherein calculating weights for CSI-RS beamforming according to the first location information of the terminal comprises:
determining the phase of the CSI-RS wave beam according to the first uplink arrival angle; and
determining the amplitude of the CSI-RS beam according to the first distance.
5. The beamforming method according to any of claims 1 to 4, wherein calculating the weight of beamforming for the PDSCH according to the CSI and the first location information of the terminal comprises:
correcting the first position information of the terminal according to the CSI to obtain second position information of the terminal; and
and calculating the weight of beam forming of the PDSCH according to the second position information of the terminal.
6. The beamforming method according to claim 5, wherein obtaining the second location information of the terminal comprises:
calculating a Precoding Matrix Indicator (PMI) of the PDSCH according to the CSI;
correcting the first uplink arrival angle by using the PMI to obtain a second uplink arrival angle; and
and correcting the first distance according to the Channel Quality Indicator (CQI) in the CSI to obtain a second distance.
7. The beamforming method according to claim 6, wherein calculating the beamforming weight of the PDSCH according to the second location information of the terminal comprises:
and determining the beamforming weight of the PDSCH corresponding to the second position information according to the second corresponding relation between the position information and the beamforming weight of the PDSCH.
8. The beamforming method according to claim 6, wherein calculating the beamforming weight of the PDSCH according to the second location information of the terminal comprises:
determining the phase of the PDSCH wave beam according to the second uplink arrival angle; and
and determining the amplitude of the PDSCH wave beam according to the second distance.
9. A beamforming apparatus comprising:
the first weight calculation unit is configured to calculate a weight of channel state information reference signal (CSI-RS) beamforming according to first location information of a terminal, wherein the first location information of the terminal includes a first uplink arrival angle of a channel sounding reference signal (SRS-Pos) sent by the terminal and a first distance from a base station to the terminal;
a beam pointing unit configured to point the CSI-RS beam after beamforming to the terminal according to the weight of the CSI-RS beamforming;
the CSI receiving unit is used for receiving the CSI sent by the terminal, and the CSI is determined according to the CSI-RS after beam forming;
a second weight calculation unit configured to calculate a weight of beamforming of a Physical Downlink Shared Channel (PDSCH) according to the CSI and first location information of the terminal; and
and a beam forming unit configured to perform PDSCH beam forming according to the weight of the beam forming of the PDSCH.
10. The beamforming apparatus according to claim 9, wherein,
a first uplink arrival angle is determined according to the optimal wave beam in the SRS-Pos; and
the first distance is determined according to a mapping relation between Sounding Reference Signal (SRS) -Reference Signal Received Power (RSRP) and the distance, wherein the SRS-RSRP is the RSRP of the best beam of the SRS-Pos.
11. The beamforming apparatus according to claim 9, wherein,
the first weight calculation unit is configured to determine a weight of CSI-RS beamforming corresponding to the first location information according to a first correspondence of location information and a weight of CSI-RS beamforming.
12. The beamforming apparatus according to claim 9, wherein,
the first weight calculation unit is configured to determine a phase of the CSI-RS beam according to the first uplink angle-of-arrival and determine an amplitude of the CSI-RS beam according to the first distance.
13. The beamforming apparatus according to one of claims 9 to 12,
the second weight calculation unit is further configured to correct the first location information of the terminal according to the CSI to obtain second location information of the terminal, and calculate a weight of beamforming of the PDSCH according to the second location information of the terminal.
14. The beamforming apparatus according to claim 13,
the second weight calculation unit is further configured to calculate a Precoding Matrix Indicator (PMI) of the PDSCH according to the CSI; correcting the first uplink arrival angle by using the PMI to obtain a second uplink arrival angle; and correcting the first distance according to the Channel Quality Indicator (CQI) in the CSI to obtain a second distance.
15. The beamforming apparatus according to claim 13,
the second weight calculation unit is further configured to determine a beamforming weight of the PDSCH corresponding to the second location information according to a second corresponding relationship between the location information and the beamforming weight of the PDSCH.
16. The beamforming apparatus according to claim 13,
the second weight calculation unit is further configured to determine a phase of the PDSCH beam according to the second uplink angle of arrival, and determine an amplitude of the PDSCH beam according to the second distance.
17. A beamforming apparatus comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the beamforming method of any of claims 1 to 8 based on instructions stored in the memory.
18. A base station, comprising:
the beamforming apparatus as claimed in any one of claims 9 to 17.
19. A beamforming system comprising:
the base station of claim 18; and
and the terminal is configured to calculate CSI according to the CSI-RS after the wave beam forming sent by the base station and report the CSI to the base station.
20. A non-transitory computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the beamforming method as claimed in any of claims 1 to 8.
CN202210338334.4A 2022-04-01 2022-04-01 Beam forming method, device, system and base station Pending CN114696882A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210338334.4A CN114696882A (en) 2022-04-01 2022-04-01 Beam forming method, device, system and base station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210338334.4A CN114696882A (en) 2022-04-01 2022-04-01 Beam forming method, device, system and base station

Publications (1)

Publication Number Publication Date
CN114696882A true CN114696882A (en) 2022-07-01

Family

ID=82140144

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210338334.4A Pending CN114696882A (en) 2022-04-01 2022-04-01 Beam forming method, device, system and base station

Country Status (1)

Country Link
CN (1) CN114696882A (en)

Similar Documents

Publication Publication Date Title
CN113840324B (en) Measurement reporting method and device
WO2020238471A1 (en) Information feedback method and apparatus, information receiving method and apparatus, information acquisition method and apparatus, communication node and storage medium
EP3280070B1 (en) Channel state information acquisition and feedback method and device
CN106850009B (en) Method for determining communication beam and corresponding device
CN105471546B (en) A kind of feedback and the method and device of receiving channel state information CSI
WO2016141782A1 (en) Hybrid beam-forming transmission method and network device
US10673508B2 (en) Channel state information feedback method, user equipment, and base station
US11277190B2 (en) Determination of a preferred beam in a cellular communication network employing signal beam-forming
CN105991171B (en) A kind of three dimensional channel status information determines method and device
WO2016164058A1 (en) Base station, user equipment, and method for determining precoding matrix
CN114144977B (en) Beam forming method, device, wireless access network equipment and readable storage medium
CN106712895B (en) A kind of method and device of method that feeding back CSI and transmission downlink data
TWI635737B (en) Pilot signal sending and receiving processing method and device
US20230006713A1 (en) Precoding tracking for cell free massive mimo
WO2015030638A1 (en) Positioning of wireless devices
EP3499778A1 (en) Method and apparatus for configuring and determining reference signal, base station, and terminal
CN105450332A (en) Three-dimensional channel state information determination method and device
CN106301692A (en) A kind of channel state information acquisition method and device
CN106160934A (en) A kind of CSI feedback method, device and relevant device
CN112584420B (en) Signal measurement method, terminal and network side equipment
CN106033990A (en) Channel state information feedback method, channel state information obtaining method and devices
EP3399658B1 (en) Method and device for uplink information feedback and downlink data transmission
CN108141266A (en) The method of communication device and operation communication device
CN115119136A (en) Positioning method, terminal and network side equipment
CN107210795A (en) A kind of signal channel quality measuring method, apparatus and system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination