WO2018059002A1 - 一种波束选择方法及相关设备 - Google Patents

一种波束选择方法及相关设备 Download PDF

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Publication number
WO2018059002A1
WO2018059002A1 PCT/CN2017/087489 CN2017087489W WO2018059002A1 WO 2018059002 A1 WO2018059002 A1 WO 2018059002A1 CN 2017087489 W CN2017087489 W CN 2017087489W WO 2018059002 A1 WO2018059002 A1 WO 2018059002A1
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WO
WIPO (PCT)
Prior art keywords
downlink
beams
downlink transmit
transmit beams
terminal
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Ceased
Application number
PCT/CN2017/087489
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English (en)
French (fr)
Inventor
高秋彬
陈润华
拉盖施
王蒙军
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Publication of WO2018059002A1 publication Critical patent/WO2018059002A1/zh
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    • 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
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • 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
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a beam selection method and related equipment.
  • Beamforming is a signal preprocessing technique based on an antenna array. Beamforming produces a directional beam by adjusting the weighting coefficients of each element in the antenna array, so that a significant array gain can be obtained. Therefore, beamforming technology has great advantages in terms of expanding coverage, improving edge throughput, and interference.
  • beamforming is mainly performed on both the base station side and the terminal side.
  • the base station sends a downlink beam training signal
  • the terminal measures the downlink beam training signal, selects the best base station transmit beam, and feeds the beam related information to the base station, and simultaneously selects the corresponding optimal receive beam, and saves it locally.
  • the terminal sends an uplink beam training signal
  • the base station measures the uplink beam training signal, selects the best terminal transmission beam, transmits the beam-related information to the terminal, and selects the corresponding optimal receiving beam, and saves it locally.
  • Data transmission can be performed after the uplink and downlink transmit and receive beams are trained.
  • only the best transmit beam and receive beam are selected, but the spatial independence between the selected transmit beam and the receive beam is not considered, thereby reducing the reliability of data transmission.
  • the embodiment of the invention provides a beam selection method and related device, which are used to solve the technical problem that the reliability of data transmission in the prior art is low.
  • an embodiment of the present invention provides a beam selection method, including:
  • the terminal receives the training signal sent by the N downlink transmit beams of the base station and the beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero;
  • the terminal determines T downlink transmit beams from the N downlink transmit beams based on the training signal and the beam packet information, where T is a positive integer smaller than N.
  • the beam grouping information includes one or more of the following information:
  • the terminal determines, according to the training signal and the beam grouping information, T downlink transmit beams from the N downlink transmit beams, including:
  • the terminal determines, according to the training signal and the beam grouping information, T downlink transmission beams respectively belonging to different groups from the N downlink transmission beams.
  • the terminal determines, according to the training signal and the beam grouping information, T downlink transmit beams from the N downlink transmit beams, including:
  • T downlink transmission beams respectively belonging to different groups from the N downlink transmission beams
  • the method further includes, when the terminal determines, according to the beam grouping information, T downlink transmission beams that belong to different groups, respectively, from the N downlink transmission beams, the method further includes:
  • T downlink receive beams corresponding to the T downlink transmit beams Determining T downlink receive beams corresponding to the T downlink transmit beams, and any two downlink receive beams of the T downlink receive beams are different.
  • the method further includes: when the T downlink transmit beams are determined from the N downlink transmit beams, the method further includes:
  • T downlink receiving beams corresponding to the T downlink transmission beams Determining T downlink receiving beams corresponding to the T downlink transmission beams, and downlink transmission beams corresponding to downlink transmission beams belonging to the same packet in the T downlink transmission beams are different.
  • the method further includes:
  • an embodiment of the present invention provides a beam selection method, including:
  • the base station groups N downlink transmit beams used to send the training signal, where N is an integer greater than zero;
  • the base station groups the N downlink transmit beams used to send the training signal, including:
  • the base station groups the N downlink transmit beams according to spatial correlation of the beams;
  • the base station groups the N downlink transmit beams according to spatial directivity of the beam.
  • the beam grouping information specifically includes one or more of the following information: a number of grouping groups of the N downlink transmission beams, a number of downlink transmission beams in each group, and each of each group The beam identification information of the downlink transmission beam and the signal identification information of the training signal corresponding to each of the downlink transmission beams.
  • the method further includes:
  • the base station receives related information of the T downlink transmit beams sent by the terminal.
  • the T downlink transmit beams belong to different packets.
  • the T downlink transmit beams respectively belong to different packets, and the downlink receive beams corresponding to any two downlink transmit beams of the T downlink transmit beams are different.
  • the T downlink transmit beams respectively belong to different packets, and the downlink receive beams corresponding to the two downlink transmit beams belonging to the same packet in the T downlink transmit beams are different.
  • the method further includes:
  • the base station selects at least two downlink transmit beams from the T downlink transmit beams, and sends the downlink signals to the terminal through the at least two downlink transmit beams simultaneously;
  • the base station selects at least two downlink transmit beams from the T downlink transmit beams, and simultaneously sends the multiple downlink signals to the terminal by using the at least two downlink transmit beams respectively;
  • the base station selects a first downlink transmit beam from the T downlink transmit beams, and sends the downlink signal to the terminal by using the first downlink transmit beam, where the terminal receives by the first
  • the signal quality of the training signal sent by the downlink transmit beam is the best in the training signal sent by the T downlink transmit beams;
  • the base station selects at least two downlink transmission beams from the T downlink transmission beams, and maps the downlink signals to multiple sub-signals on different time-frequency resources to be sent to the terminal by using the at least two downlink transmission beams respectively. .
  • an embodiment of the present invention provides a terminal, including:
  • a first receiving module configured to receive a training signal sent by the N downlink transmit beams of the base station, and beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero;
  • the first determining module is configured to determine T downlink transmit beams from the N downlink transmit beams based on the training signal and the beam packet information, where T is a positive integer smaller than N.
  • the beam grouping information includes one or more of the following information:
  • the number of packet groups of the N downlink transmission beams, the number of downlink transmission beams in each packet, and each packet in each packet The beam identification information of the downlink transmission beam and the signal identification information of the training signal corresponding to each of the downlink transmission beams.
  • the first determining module is configured to:
  • the first determining module is configured to:
  • T downlink transmission beams respectively belonging to different groups from the N downlink transmission beams
  • the first determining module is further configured to: when the terminal determines, according to the beam grouping information, T downlink transmission beams that belong to different groups, respectively, from the N downlink transmission beams, the first determining module is further configured to:
  • T downlink receive beams corresponding to the T downlink transmit beams Determining T downlink receive beams corresponding to the T downlink transmit beams, and any two downlink receive beams of the T downlink receive beams are different.
  • the determining, by the determining, the T downlink transmit beams from the N downlink transmit beams, the first determining module is further configured to:
  • T downlink receiving beams corresponding to the T downlink transmission beams Determining T downlink receiving beams corresponding to the T downlink transmission beams, and downlink transmission beams corresponding to downlink transmission beams belonging to the same packet in the T downlink transmission beams are different.
  • the terminal after the determining, by the terminal, the T downlink transmission beams from the N downlink transmission beams, based on the training signal and the beam grouping information, the terminal further includes:
  • the first sending module is configured to send related information of the T downlink transmit beams to the base station, so that the base station determines, according to the T downlink transmit beams, a downlink transmit beam that sends a downlink signal to the terminal.
  • an embodiment of the present invention further provides a base station, including:
  • a second grouping module configured to group N downlink transmit beams used to send the training signal, where N is an integer greater than zero;
  • a second sending module configured to send beam grouping information of the N downlink transmit beams to the terminal, so that the terminal determines, according to the beam packet information, T downlink transmit beams from the N downlink transmit beams.
  • T is a positive integer less than or equal to N.
  • the second grouping module is configured to:
  • the base station groups the N downlink transmit beams according to spatial correlation of the beams;
  • the base station groups the N downlink transmit beams according to spatial directivity of the beam.
  • the beam grouping information specifically includes one or more of the following information: a number of grouping groups of the N downlink transmission beams, a number of downlink transmission beams in each group, and each of each group Downstream transmission Beam identification information of the beam and signal identification information of the training signal corresponding to each of the downlink transmission beams.
  • the base station after the base station sends the beam packet information of the N downlink transmit beams to the terminal, the base station further includes:
  • a second receiving module configured to receive information about the T downlink transmit beams sent by the terminal.
  • the T downlink transmit beams belong to different packets.
  • the T downlink transmit beams respectively belong to different packets, and the downlink receive beams corresponding to any two downlink transmit beams of the T downlink transmit beams are different.
  • the T downlink transmit beams respectively belong to different packets, and the downlink receive beams corresponding to the two downlink transmit beams belonging to the same packet in the T downlink transmit beams are different.
  • the base station after the receiving the information about the T downlink transmit beams sent by the terminal, the base station further includes:
  • a second selection module configured to select at least two downlink transmit beams from the T downlink transmit beams, and send the downlink signals to the terminal by using the at least two downlink transmit beams simultaneously;
  • an embodiment of the present invention provides a terminal, where the terminal mainly includes a processor, a memory, and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the preset program is stored in the memory.
  • the processor reads the program in the memory and executes the following process according to the program:
  • T downlink transmission beams from the N downlink transmission beams, where T is a positive integer smaller than N.
  • the beam grouping information includes one or more of the following information:
  • the processor determines, according to the training signal and the beam grouping information, T downlink transmission beams that belong to different groups, respectively, from the N downlink transmission beams.
  • the processor determines T downlink transmit beams respectively belonging to different packets from the N downlink transmit beams according to the training signal and the beam packet information;
  • the processor determines T downlink receive beams corresponding to the T downlink transmit beams, and any two downlink receive beams of the T downlink receive beams are different.
  • the processor determines T downlink receive beams corresponding to the T downlink transmit beams, and the downlink receive beams corresponding to the downlink transmit beams belonging to the same packet in the T downlink transmit beams are different.
  • the processor instructs the transceiver to send information about the T downlink transmit beams to the base station, so that the base station determines to send a downlink signal to the terminal based on the T downlink transmit beams. Downstream transmit beam.
  • an embodiment of the present invention provides a base station, including: a processor, a memory, and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the preset program is stored in the memory, and the processor reads Take the program in the memory, according to the program to perform the following process:
  • the processor groups the N downlink transmit beams according to spatial correlation of the beams
  • the processor groups the N downlink transmit beams according to spatial directivity of the beam.
  • the beam grouping information specifically includes one or more of the following information: a number of grouping groups of the N downlink transmission beams, a number of downlink transmission beams in each group, and each of each group The beam identification information of the downlink transmission beam and the signal identification information of the training signal corresponding to each of the downlink transmission beams.
  • the processor instructs the transceiver to receive information about the T downlink transmit beams sent by the terminal.
  • the T downlink transmit beams belong to different packets.
  • the T downlink transmit beams respectively belong to different packets, and the downlink receive beams corresponding to any two downlink transmit beams of the T downlink transmit beams are different.
  • the T downlink transmit beams respectively belong to different packets, and the downlink receive beams corresponding to the two downlink transmit beams belonging to the same packet in the T downlink transmit beams are different.
  • the base station selects at least two downlink transmit beams from the T downlink transmit beams, and sends the downlink signals to the terminal by using the at least two downlink transmit beams simultaneously;
  • the terminal receives the training signal sent by the N downlink transmit beams of the base station and the beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero.
  • the terminal determines T downlink transmit beams from the N downlink transmit beams based on the training signal and the beam packet information, where T is a positive integer smaller than N, so that the determined T downlink transmissions are performed.
  • the beam has better spatial independence, which ensures the reliability of data transmission, and solves the technical problem of low reliability of data transmission in the prior art.
  • FIG. 1 is a flowchart of a specific implementation of a beam selection method according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a specific implementation of another beam selection method according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of another terminal according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of another base station according to an embodiment of the present invention.
  • the specific process of beam selection is as follows:
  • Step 101 The terminal receives the training signal sent by the N downlink transmit beams of the base station and the beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero.
  • the terminal has M receiving beams, N is 4, M is 4, and thus, the received signal received by the terminal is s nm , and s nm is the mth downlink receiving beam for the terminal.
  • Receiving a received signal obtained by the nth downlink transmit beam of the base station, and s nm itself may be a time domain signal or a frequency domain signal, and s nm is a signal sequence.
  • the beam grouping information includes one or more of the following information:
  • the beam grouping information includes: the number of packet groups of four downlink transmission beams, for example, four downlink transmission beams are divided into four groups, three groups, or two groups.
  • each group includes 1 downlink transmit beam; when divided into 2 groups, each group includes 2 downlink transmit beams, or a group It contains one downlink transmit beam and the other group contains three downlink transmit beams.
  • the beam identification information of each downlink transmit beam in each packet for example, when divided into four groups, the beam identification information included in each group is: x 0 , x 1 , x 2 , x 3 .
  • the value of the beam identification information ranges from 0, 1, 2, ..., N-1.
  • the signal identification information of the training signal corresponding to each downlink transmission beam for example, when divided into four groups, the signal identification information of the training signal of the downlink transmission beam included in each group is: y 0 , y 1 , y 2 , y 3 , the value range of the signal identification information is: 0, 1, 2, ... N-1.
  • Step 102 The terminal determines, according to the training signal and the beam grouping information, T downlink transmit beams from the N downlink transmit beams, where T is a positive integer smaller than N.
  • step 102 specifically includes the following steps:
  • the terminal determines, according to the training signal, Q downlink transmit beams from the N downlink transmit beams, where Q is an integer greater than zero;
  • the second step the terminal determines, according to the beam grouping information, T downlink transmission beams from the Q downlink transmission beams, where T is less than or equal to Q.
  • the Q downlink transmission beams are determined from the N downlink transmission beams, including but not limited to the following three manners, specifically:
  • the first type determining, according to the received power of the received signal received by the terminal, the Q received signals whose received power is greater than the preset power, and then determining the Q downlink transmit beams corresponding to the Q received signals.
  • the preset power may specifically be: 5 milliwatts, 7 milliwatts, or 8 milliwatts, or other preset power values.
  • the preset power is 5 mW, taking the received signal of the first receiving beam as an example. If the power of each received signal of the first receiving beam is: 6 mW, 4 mW, 7 Milliwatts, 8 mW, if the received signals exceeding the preset power are s 11 , s 31 , s 41 , the corresponding downlink transmit beams are the first, third, and fourth downlink transmit beams, based on which, it can be determined A downlink transmit beam corresponding to each downlink receive beam is output.
  • the second type determining, according to the signal to interference and noise ratio of the received signal received by the terminal, the Q received signals whose signal to interference and noise ratio is greater than the preset signal to interference and noise ratio, and then determining the Q downlink transmissions corresponding to the Q received signals. Beam.
  • the Q received signals whose signal ratio is greater than the preset signal to noise ratio are determined, and then the Q downlink transmit beams corresponding to the Q received signals are determined.
  • T downlink transmit beams are selected from the Q downlink transmit beams according to the beam packet information.
  • the T downlink transmission beams are determined according to the beam grouping information, including but not limited to the following three implementation manners, specifically:
  • the terminal determines, according to the training signal and the beam grouping information, T downlink transmission beams belonging to different groups from the N downlink transmission beams.
  • four downlink transmission beams are represented by A, B, C, and D
  • four downlink reception beams are represented by A', B', C', and D'
  • packet information of the downlink transmission beam is represented.
  • AB is a group
  • CD is a group. If the determined Q downlink transmit beams are specifically: A' (A B); B' (A); C' (C D); D' (B D), where A' (A B) indicates, and
  • the downlink transmission beam corresponding to the downlink receiving beam A' determines that the T downlink transmission beams are the downlink transmission beam A and the downlink transmission beam D.
  • the terminal determines, according to the training signal and the beam grouping information, T downlink transmission beams belonging to different groups from the N downlink transmission beams;
  • the method further includes: when the terminal determines, according to the beam grouping information, the T downlink transmission beams that belong to different packets from the N downlink transmission beams, the method further includes:
  • T downlink receive beams corresponding to the T downlink transmit beams Determining T downlink receive beams corresponding to the T downlink transmit beams, and any two downlink receive beams of the T downlink receive beams are different.
  • four downlink transmission beams are represented by A, B, C, and D
  • four downlink reception beams are represented by A', B', C', and D'
  • packet information of the downlink transmission beam is represented.
  • AB is a group
  • CD is a group. If the determined downlink downlink transmit beams are specifically: A′(A B); B′(A); C′(C D); D′(B D), determining that T downlink transmit beams are downlink transmissions Beam A and downlink transmit beam D.
  • the T downlink receive beams corresponding to the T downlink transmit beams are also determined, and any two downlink receive beams of the T downlink receive beams are different.
  • the terminal determines, according to the training signal, P downlink receiving beams, where the P downlink receiving beams may be downlink receiving beams for all downlink transmitting beams, or may only be corresponding to T downlink transmitting beams.
  • the downlink receiving beam is not specifically limited in the embodiment of the present application.
  • the P downlink receiving beams are used as an example for the downlink receiving beams of all the downlink transmitting beams, and the implementation manners of determining the P downlink receiving beams from the M downlink receiving beams are specifically described, including but Not limited to the following three ways:
  • the first type determining, according to the received power of the received signal received by the terminal, P received signals whose received power is greater than the preset power, and then determining P downlink receive beams corresponding to the P received signals.
  • the preset power may specifically be: 5 milliwatts, 7 milliwatts, or 8 milliwatts, or other preset power values.
  • the preset power is 5 mW
  • the received signal of the first transmit beam is received by four receive beams as an example. If the receive signals received by the four receive beams respectively have a power of 6 mW, 4 mW, 7 mW, 8 mW, if the received signals exceeding the preset power are s 11 , s 13 , s 14 , the corresponding downlink receiving beams are the first, third, and fourth downlink receiving beams, based on Therefore, the downlink receiving beam corresponding to each downlink transmitting beam can be determined.
  • the second type according to the signal to interference and noise ratio of the received signal received by the terminal, determining P received signals whose signal to interference and noise ratio is greater than the preset signal to interference and noise ratio, and then determining P downlink receiving corresponding to the P received signals. Beam.
  • the third type according to the signal to noise ratio of the received signal received by the terminal, determining P received signals whose signal ratio is greater than the preset signal to noise ratio, and then determining P downlink receiving beams corresponding to the P received signals.
  • the determined P downlink receiving beams are specifically: A (A' B'); B (A'); C (C' D'); D (B' D'), then determining The receive beams corresponding to the T downlink transmit beams should be A' and D' instead of B' and B'.
  • the third type of T downlink downlink beams corresponding to the T downlink transmission beams are different, and the downlink reception beams corresponding to the downlink transmission beams belonging to the same packet in the T downlink transmission beams are different.
  • each downlink transmission beams are represented by A, B, C, and D
  • four downlink reception beams are represented by A', B', C', and D'
  • packet information of the downlink transmission beam is represented.
  • the downlink transmission beams AB are grouped into one group
  • the downlink transmission beams CD are grouped into one group. If the determined Q downlink transmission beams are specifically: A'(A); B'(B); C'(C); D'(D), T downlink transmissions determined from Q downlink transmission beams
  • the beam is: A and B downlink transmission beams belonging to the same packet and C and D downlink transmission beams belonging to the same packet.
  • the T receive beams corresponding to the T transmit beams are also determined, and the downlink receive beams corresponding to the downlink transmit beams belonging to the same packet are different from the T downlink receive beams, that is, the downlink transmit beam AB
  • the downlink receive beams are different, and the downlink receive beams of the downlink transmit beam CD are different.
  • the determined P downlink receiving beams are specifically: A (A' B'); B (A'); (C' D'); D (B' D'), determining that the downlink receive beams corresponding to the T downlink transmit beams are respectively A (B'); B (A'); C (C') D (B '); or C(D')D(B'); or C(C')D(D').
  • Step 101 The terminal receives the training signal sent by the N downlink transmit beams of the base station and the beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero.
  • the receiving signal received by the terminal is s nm , and s nm is obtained by the nth downlink transmitting beam of the base station receiving the base station by the mth downlink receiving beam.
  • the signal is received, and s nm itself can be a time domain signal or a frequency domain signal, and s nm is a signal sequence.
  • the beam grouping information includes one or more of the following information:
  • the beam grouping information includes: the number of grouping groups of 16 downlink transmitting beams, for example, divided into 2 groups, 4 groups, or 8 groups.
  • each group contains 4 downlink transmit beams; when divided into 2 groups, each group includes 8 downlink transmit beams.
  • the beam identification information of each downlink transmit beam in each packet is divided into four groups, and each group of four downlink transmit beams, the beam identification information included in the nth group is: x n0 , x n1 , x n2 , x n3 .
  • the value of the beam identification information ranges from 0, 1, 2, ..., N-1.
  • the signal identification information of the training signal corresponding to each downlink transmission beam for example, when the group is divided into four groups, the signal identification information of the training signal of the downlink transmission beam included in the nth group is: y n0 , y n1 , y n2 , y n3 , the value range of the signal identification information is: 0, 1, 2, ... N-1.
  • Step 102 The terminal determines, according to the training signal and the beam grouping information, T downlink transmit beams from the N downlink transmit beams, where T is a positive integer smaller than N.
  • the value of T may be determined by the base station, notified to the terminal, or agreed to a fixed value in the protocol, or the terminal determines the value of T according to the measurement result of the signal.
  • step 102 specifically includes the following steps:
  • the terminal may not be able to receive MN received signals, and may only receive a part of the signals, for example, only receiving signals of several downlink transmit beams, and subsequent
  • the calculation process can be performed only based on the received signals, and the principle is the same and will not be described again.
  • the second step is: determining, for each downlink transmit beam, its corresponding downlink receive beam.
  • the corresponding receive beam can be determined as follows:
  • the third step the terminal determines, according to the beam grouping information, T downlink transmission beams from the N downlink transmission beams, where T is less than or equal to N.
  • the value of the received power is used as an example.
  • the received signal to interference and noise ratio, the received signal to noise ratio, and the received channel capacity can be used for calculation.
  • the T downlink transmission beams are determined from the N downlink transmission beams according to the beam grouping information, including but not limited to the following three implementation manners, specifically:
  • the terminal determines, according to the training signal and the beam grouping information, T downlink transmission beams belonging to different groups from the N downlink transmission beams.
  • the packet information represented by the downlink transmission beam indicates that AB is a group and the CD is a group in the downlink transmission beam. It is determined that the T downlink transmit beams are the downlink transmit beam A and the downlink transmit beam D.
  • T 2.
  • the specific determining process may be: the terminal first selects the downlink transmit beam with the highest received power from among all the downlink transmit beams as the first one of the T beams, and may be set as the downlink transmit beam A; then the terminal sends the downlink transmission again.
  • the beam with the highest received power is selected from the beams other than all the beams in the packet where the beam A is located, and the second beam is the downlink transmit beam D in this example.
  • T is greater than 2
  • the selection process is similar: all the beams in the group in which the selected beam is located are removed from the N downlink transmission beams, and one beam having the highest received power is selected from the remaining beams.
  • a threshold of the received signal power may be preset, and the terminal determines the downlink.
  • the terminal determines the downlink.
  • the terminal determines, according to the training signal and the beam grouping information, T downlink transmission beams belonging to different groups from the N downlink transmission beams;
  • the method further includes: when the terminal determines, according to the beam grouping information, the T downlink transmission beams that belong to different packets from the N downlink transmission beams, the method further includes:
  • T downlink receive beams corresponding to the T downlink transmit beams Determining T downlink receive beams corresponding to the T downlink transmit beams, and any two downlink receive beams of the T downlink receive beams are different.
  • the embodiment of the present invention four downlink transmit beams are represented by A, B, C, and D, and four downlink receive beams are represented by A′, B′, C′, D′.
  • the packet information represented by the downlink transmission beam indicates that AB is a group and the CD is a group in the downlink transmission beam. It is determined that the T downlink transmit beams are the downlink transmit beam A and the downlink transmit beam C.
  • the specific determining process may be: the terminal first selects the downlink transmit beam with the highest received power from among all the downlink transmit beams as the first one of the T beams, and may be set as the downlink transmit beam A; then the terminal then proceeds from the N downlinks.
  • the following two types of downlink transmit beams are removed from the transmit beam:
  • the downlink transmission beam with the same downlink transmission beam as the downlink reception beam corresponding to the downlink transmission beam A ie, if the downlink reception beam corresponding to one downlink transmission beam is the same as the downlink reception beam corresponding to the downlink transmission beam A), the downlink transmission is performed.
  • the beam is to be excluded
  • the terminal selects the beam with the highest received power from the remaining downlink transmit beams as the second one of the T beams.
  • the downlink transmit beam D is the same as the downlink receive beam corresponding to the downlink transmit beam A, and the second beam is the downlink transmit beam C. If T is greater than 2, the selection process is similar: remove the following two types of beams, and select the one with the highest received power from the remaining beams:
  • a downlink transmission beam having the same downlink downlink beam as the downlink reception beam corresponding to the downlink transmission beam that has been selected ie, if the downlink reception beam corresponding to one downlink transmission beam corresponds to any downlink transmission beam that has been selected. If the receive beams are the same, the downlink transmit beam is to be excluded).
  • a threshold of the received signal power may be preset.
  • the terminal first excludes all downlink transmit beams whose received power is less than the threshold, and then according to the foregoing from the remaining beams. The process determines the downlink transmit beam, and the number of downlink transmit beams that can be determined is the value of T.
  • the terminal transmits the N downlink transmission beams according to the training signal and the beam grouping information.
  • the T downlink transmit beams are determined; and any two corresponding downlink receive beams of the T downlink transmit beams are different.
  • the embodiment of the present invention four downlink transmit beams are represented by A, B, C, and D, and four downlink receive beams are represented by A′, B′, C′, D′.
  • the packet information represented by the downlink transmission beam indicates that AB is a group and the CD is a group in the downlink transmission beam. It is determined that the T downlink transmit beams are the downlink transmit beam A and the downlink transmit beam B.
  • the specific determining process may be: the terminal first selects the downlink transmit beam with the highest received power from among all the downlink transmit beams as the first one of the T beams, and may be set as the downlink transmit beam A; then the terminal then proceeds from the N downlinks.
  • the downlink transmit beam is removed from the transmit beam: the downlink receive beam with the same downlink receive beam and the downlink receive beam corresponding to the downlink transmit beam A (ie, if the downlink receive beam corresponding to one downlink transmit beam and the downlink receive beam A correspond to downlink receive) If the beams are the same, the downlink transmit beam is to be excluded);
  • the terminal selects the beam with the highest received power from the remaining downlink transmit beams as the second one of the T beams.
  • the downlink transmit beam D is the same as the downlink receive beam corresponding to the downlink transmit beam A.
  • the downlink transmit beam B has the highest received power in the remaining downlink transmit beams. Therefore, the second beam is the downlink transmit beam B. If T is greater than 2, the selection process is similar: remove the following beam and select the one with the highest received power from the remaining beams:
  • the downlink receiving beam is the same as the downlink receiving beam corresponding to the downlink receiving beam that is selected (that is, if the downlink receiving beam corresponding to one downlink transmitting beam is the downlink receiving beam corresponding to any selected downlink transmitting beam) If the same, the downlink transmit beam is to be excluded).
  • a threshold of the received signal power may be preset.
  • the terminal first excludes all downlink transmit beams whose received power is less than the threshold, and then according to the foregoing from the remaining beams. The process determines the downlink transmit beam, and the number of downlink transmit beams that can be determined is the value of T.
  • the method further includes:
  • the information about the downlink transmit beam includes the beam identifier of the T downlink transmit beams, such as the number of the downlink transmit beam, q 0 , q 1 , q 2 ... q T-1 .
  • the information of the T downlink transmit beams fed back by the terminal may be different according to the multiplexing manner of the downlink transmit beam or the training signal corresponding to the downlink transmit beam, for example, the training signal is in different OFDM symbols or subframes. Multiplexing, the terminal measures and feeds back the selected downlink time information; or the training signal is multiplexed in different frequency resources, and the terminal measures and feeds back the selected downlink frequency information.
  • the related information of the downlink transmitting beam may further include the receiving received by the terminal. Signal strength information of the signal, such as the power of the received signal.
  • the terminal needs to save the downlink receiving beam corresponding to the T downlink transmitting beams and the correspondence between the T downlink transmitting beams and the downlink receiving beams.
  • the specific downlink signal can be the downlink receiving beam.
  • the number of the beam shaping weight corresponding to the downlink receiving beam may be selected by a person skilled in the art according to actual needs, and is not specifically limited in the embodiment of the present application.
  • Step 201 The base station groups N downlink transmit beams used to send the training signal, where N is an integer greater than zero.
  • the base station may transmit one training signal for each downlink transmission beam, for example, there are N downlink transmission beams, and the base station transmits N training signals.
  • TDM Time Division Multiplexing
  • CDM Code Division Multiplexing
  • FDM Frequency Division Multiplexing
  • Any combination of the two or more modes may be set by a person skilled in the art according to actual needs, and is not specifically limited in the embodiment of the present application.
  • a system based on OFDM Orthogonal Frequent Frequency Division Multuping
  • N training signals can occupy N OFDM symbols.
  • Each training signal occupies one OFDM symbol, and the training signals are TDM multiplexed between them; a plurality of training signals may also be transmitted in one OFDM symbol, and the plurality of training signals are FDM multiplexed or CDM multiplexed.
  • the weight of the downlink transmission beam may be composed of an oversampled DFT vector.
  • the oversampled DFT vector has an O 1 N 1 , specifically:
  • the weight of the downstream transmit beam can be composed of oversampled 2D DFT vectors. Assuming that the number of antenna elements in the first dimension and the second dimension is N 1 and N 2 , respectively, and the oversampling rate factors of the two dimensions are O 1 and O 2 , respectively, the oversampled DFT vector has O 1 O 2 N 1 N 2 :
  • step 201 includes but is not limited to the following two implementation manners, specifically:
  • the base station groups the N downlink transmit beams according to spatial correlation of the beams.
  • the spatial correlation between the downlink transmission beam 1 and the downlink transmission beam 2 is The downlink transmit beams whose spatial correlation is higher than the preset value are then grouped into one group.
  • the array antenna is taken as an example, for example, it is divided into N 1 groups, each group of O 1 beams, and the weight corresponding to the nth group downlink transmission beam is
  • the weights corresponding to the group beam include:
  • the base station groups the N downlink transmit beams according to spatial directivity of the beam.
  • the spatial directivity of the beam refers to the direction of the beam in space, and then the space of the downlink transmission beam is directed within a certain range of angles, such as: 0° to 250°, and 250° to 360°.
  • the beam packet information specifically includes one or more of the following information: a number of packet groups of the N downlink transmit beams, a number of downlink transmit beams in each packet, and each of each packet The beam identification information of the downlink transmission beam and the signal identification information of the training signal corresponding to each of the downlink transmission beams.
  • the beam grouping information includes: the number of packet groups of four downlink transmission beams, for example, four downlink transmission beams are divided into four groups, three groups, or two groups.
  • each group includes 1 downlink transmit beam; when divided into 2 groups, each group includes 2 downlink transmit beams, or a group It contains one downlink transmit beam and the other group contains three downlink transmit beams.
  • the beam identification information of each downlink transmit beam in each packet for example, when divided into four groups, the beam identification information included in each group is: x 0 , x 1 , x 2 , x 3 .
  • the value of the beam identification information ranges from 0, 1, 2, ..., N-1.
  • the signal identification information of the training signal corresponding to each downlink transmission beam for example, when divided into four groups, the signal identification information of the training signal of the downlink transmission beam included in each group is: y 0 , y 1 , y 2 , y 3 , the value range of the signal identification information is: 0, 1, 2, ... N-1.
  • Step 202 The base station sends the beam packet information of the N downlink transmit beams to the terminal, so that the terminal determines T downlink transmit beams from the N downlink transmit beams according to the beam packet information.
  • T is a positive integer less than or equal to N.
  • the beam packet information of the N downlink transmission beams is sent to the terminal, so that the terminal can receive the beam grouping information according to the base station. Determining T downlink transmission beams for transmitting downlink signals is determined from N downlink transmission beams.
  • the method further includes:
  • the base station receives related information of the T downlink transmit beams sent by the terminal.
  • the information about the downlink transmit beam includes the beam identifier of the T downlink transmit beams, such as the number of the downlink transmit beam, q 0 , q 1 , q 2 ... q T-1 .
  • the T downlink transmission beams respectively belong to different groups.
  • the T downlink transmission beams belong to different groups, and the downlink receiving beams corresponding to any two downlink transmission beams of the T downlink transmission beams are different.
  • the T downlink transmit beams belong to different packets, and the downlink receive beams corresponding to the two downlink transmit beams belonging to the same packet in the T downlink transmit beams are different.
  • the T downlink transmit beams meet one or a combination of the following conditions, specifically:
  • the T downlink transmit beams belong to different packets, that is, a maximum of one downlink transmit beam is selected from each packet;
  • the downlink receive beams corresponding to the two downlink transmit beams are different.
  • the third downlink transmit beam belongs to different packets, and the downlink receive beams corresponding to any two downlink transmit beams of the T downlink transmit beams are different.
  • the method further includes:
  • the base station selects at least two downlink transmit beams from the T downlink transmit beams, and sends the downlink signals to the terminal through the at least two downlink transmit beams simultaneously;
  • the base station selects at least two downlink transmit beams from the T downlink transmit beams, and simultaneously sends the multiple downlink signals to the terminal by using the at least two downlink transmit beams respectively;
  • the base station selects a first downlink transmit beam from the T downlink transmit beams, and sends the downlink signal to the terminal by using the first downlink transmit beam, where the terminal receives by the first
  • the signal quality of the training signal sent by the downlink transmit beam is the best in the training signal sent by the T downlink transmit beams;
  • the base station selects at least two downlink transmission beams from the T downlink transmission beams, and maps the downlink signals to multiple sub-signals on different time-frequency resources to be sent to the terminal by using the at least two downlink transmission beams respectively. .
  • the base station can transmit according to the following information transmission manners according to the following information about the T downlink transmission beams sent by the terminal:
  • the base station selects at least two downlink transmission beams from the T downlink transmission beams recommended by the terminal, and the downlink transmission beam A and the downlink transmission beam B are taken as an example.
  • the signal s i is respectively passed through the downlink transmission beam.
  • a and downlink transmit beam B are sent to the terminal, so that the signal s i is transmitted through different spatial paths, thereby ensuring that the terminal can receive multiple statistically independent, received signals carrying the same information, and then performing the received multiple received signals.
  • the base station selects at least two downlink transmission beams from the T downlink transmission beams recommended by the terminal, and the downlink transmission beam A and the downlink transmission beam B are taken as an example.
  • multiple signals such as: s 1 ,
  • the s 2 and the s 3 are simultaneously transmitted by using the downlink transmit beam A and the downlink transmit beam B, where the signal s i can be sent by using the downlink transmit beam A or the downlink transmit beam B or the downlink transmit A and the downlink transmit B, in the embodiment of the present application.
  • Medium no specific limit.
  • the base station receives the related information of the T downlink transmit beams fed back by the terminal, and includes the received power of the received signal corresponding to the training signal sent by the T downlink transmit beams. Therefore, the base station can determine the received signal with the strongest received power according to the received power of the received signal, and further determine the downlink transmit beam corresponding to the received signal as the first downlink transmit beam. Correspondingly, the downlink signal s i is transmitted through the first downlink transmission beam.
  • the base station may switch the signal to other downlinks. Transmission is performed on the transmit beam.
  • the embodiment of the present invention ensures sufficient spatial isolation between the T downlink transmission beams recommended by the terminal, thereby avoiding problems of T downlink transmission beams simultaneously, such as: The probability that the T downlink transmit beams are simultaneously occluded is greatly reduced. In this way, the base station can recover the downlink signal transmission by switching the downlink transmit beam, thereby achieving the technical effect of improving the reliability of the data transmission.
  • the fourth type is beam switching transmission.
  • the base station selects at least two downlink transmission beams from the T downlink transmission beams recommended by the terminal, and the downlink transmission beam A and the downlink transmission beam B are taken as an example. After the downlink transmission beam is selected, the downlink signal s i is mapped to different time and frequency. Multiple sub-signals on the resource are transmitted through different downlink transmit beams. In the same manner, the embodiment of the present invention ensures sufficient spatial isolation between the T downlink transmission beams recommended by the terminal, thereby preventing each sub-signal from being affected by the same, thereby ensuring the reliability of data transmission.
  • the terminal mainly includes:
  • the first receiving module 301 is configured to receive a training signal sent by the N downlink transmit beams of the base station and beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero;
  • the first determining module 302 is configured to determine T downlink transmit beams from the N downlink transmit beams based on the training signal and the beam packet information, where T is a positive integer smaller than N.
  • the beam grouping information includes one or more of the following information:
  • the first determining module 302 is configured to:
  • the first determining module 302 is configured to:
  • T downlink transmission beams respectively belonging to different groups from the N downlink transmission beams
  • the first determining module 302 is further configured to: when the terminal determines, according to the beam grouping information, T downlink transmission beams that belong to different groups, respectively, from the N downlink transmission beams, the first determining module 302 is further configured to:
  • T downlink receive beams corresponding to the T downlink transmit beams Determining T downlink receive beams corresponding to the T downlink transmit beams, and any two downlink receive beams of the T downlink receive beams are different.
  • the first determining module 302 is further configured to: when the T downlink transmit beams are determined from the N downlink transmit beams, the first determining module 302 is further configured to:
  • T downlink receive beams corresponding to the T downlink transmit beams Determining T downlink receive beams corresponding to the T downlink transmit beams, and among the T downlink transmit beams The downlink receive beams corresponding to the downlink transmit beams belonging to the same packet are different.
  • the terminal after the determining, by the terminal, the T downlink transmission beams from the N downlink transmission beams, based on the training signal and the beam grouping information, the terminal further includes:
  • the first sending module 303 is configured to send related information of the T downlink transmit beams to the base station, so that the base station determines, according to the T downlink transmit beams, a downlink transmit beam that sends a downlink signal to the terminal. .
  • an embodiment of the present invention provides a base station.
  • the base station mainly includes:
  • a second grouping module 401 configured to group N downlink transmit beams used to send the training signal, where N is an integer greater than zero;
  • the second sending module 402 is configured to send, to the terminal, the beam grouping information of the N downlink transmit beams, so that the terminal determines, according to the beam packet information, T downlink transmissions from the N downlink transmit beams.
  • the beam, T is a positive integer less than or equal to N.
  • the second grouping module 401 is configured to:
  • the base station groups the N downlink transmit beams according to spatial correlation of the beams;
  • the base station groups the N downlink transmit beams according to spatial directivity of the beam.
  • the beam grouping information specifically includes one or more of the following information: a number of grouping groups of the N downlink transmission beams, a number of downlink transmission beams in each group, and each of each group The beam identification information of the downlink transmission beam and the signal identification information of the training signal corresponding to each of the downlink transmission beams.
  • the base station after the base station sends the beam packet information of the N downlink transmit beams to the terminal, the base station further includes:
  • the second receiving module 403 is configured to receive related information of the T downlink transmit beams sent by the terminal.
  • the T downlink transmit beams belong to different packets.
  • the T downlink transmit beams respectively belong to different packets, and the downlink receive beams corresponding to any two downlink transmit beams of the T downlink transmit beams are different.
  • the T downlink transmit beams respectively belong to different packets, and the downlink receive beams corresponding to the two downlink transmit beams belonging to the same packet in the T downlink transmit beams are different.
  • the base station after the receiving the information about the T downlink transmit beams sent by the terminal, the base station further includes:
  • a second selection module 404 configured to select at least two downlink transmit beams from the T downlink transmit beams, and send the downlink signals to the terminal by using the at least two downlink transmit beams simultaneously;
  • the embodiment of the present invention provides a terminal.
  • the terminal mainly includes a processor 501.
  • the memory 502 and the transceiver 503, the processor 501, the memory 502 and the transceiver 503 are connected by a bus architecture, and the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 501 and The various circuits of the memory represented by memory 502 are linked together.
  • 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.
  • Transceiver 503 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the transceiver 503 receives and transmits data under the control of the processor 501.
  • the memory 502 stores a preset program, and the processor 501 reads the program in the memory 502, and executes the following process according to the program:
  • T downlink transmission beams from the N downlink transmission beams, where T is a positive integer smaller than N.
  • the beam grouping information includes one or more of the following information:
  • the processor 501 determines, according to the training signal and the beam grouping information, the T downlink transmission beams that belong to different groups, respectively, according to the training signal and the beam grouping information.
  • the processor 501 determines, according to the training signal and the beam grouping information, T downlink transmit beams that belong to different groups, respectively, from the N downlink transmit beams;
  • the processor 501 determines T downlink receive beams corresponding to the T downlink transmit beams, and any two downlink receive beams of the T downlink receive beams are different.
  • the processor 501 determines T downlink receiving waves corresponding to the T downlink transmit beams. And a downlink receiving beam corresponding to a downlink transmission beam belonging to the same packet among the T downlink transmission beams is different.
  • the processor 501 instructs the transceiver 503 to send information about the T downlink transmit beams to the base station, so that the base station determines to send the downlink to the terminal based on the T downlink transmit beams.
  • the downstream transmit beam of the signal is the T downlink transmit beams.
  • the embodiment of the present invention provides a base station.
  • the base station mainly includes: a processor 601 and a memory.
  • 602 and transceiver 603, processor 601, memory 602 and transceiver 603 are connected by a bus architecture
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 601 and The various circuits of the memory represented by memory 602 are linked together.
  • 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 603 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 604 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the transceiver 603 receives and transmits data under the control of the processor.
  • the memory 602 stores a preset program, and the processor 601 reads the program in the memory 602, and executes the following process according to the program:
  • T is A positive integer less than or equal to N.
  • the processor 601 groups the N downlink transmit beams according to spatial correlation of the beams;
  • the processor 601 groups the N downlink transmit beams according to spatial directivity of the beam.
  • the beam grouping information specifically includes one or more of the following information: a number of grouping groups of the N downlink transmission beams, a number of downlink transmission beams in each group, and each of each group The beam identification information of the downlink transmission beam and the signal identification information of the training signal corresponding to each of the downlink transmission beams.
  • the processor 601 instructs the transceiver 603 to receive related information of the T downlink transmit beams sent by the terminal.
  • the T downlink transmit beams belong to different packets.
  • the T downlink transmit beams respectively belong to different packets, and the downlink receive beams corresponding to any two downlink transmit beams of the T downlink transmit beams are different.
  • the T downlink transmit beams respectively belong to different packets, and the downlink receive beams corresponding to the two downlink transmit beams belonging to the same packet in the T downlink transmit beams are different.
  • the processor 601 selects at least two downlink transmit beams from the T downlink transmit beams, and sends the downlink signals to the terminal by using the at least two downlink transmit beams simultaneously; or
  • the terminal receives the training signal sent by the N downlink transmit beams of the base station and the beam packet information of the N downlink transmit beams sent by the base station, where N is an integer greater than zero.
  • the terminal determines T downlink transmit beams from the N downlink transmit beams based on the training signal and the beam packet information, where T is a positive integer smaller than N, so that the determined T downlink transmissions are performed.
  • the spatial independence between the beams ensures the reliability of data transmission, thereby solving the technical problem of low reliability of data transmission in the prior art.
  • 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 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 include instructions.
  • the instruction means implements the functions specified in a block or blocks of a flow or a flow and/or a 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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Abstract

本发明公开了一种波束选择方法及相关设备，用于解决现有技术中存在数据传输的可靠性低的技术问题。方法为：终端接收由基站的N个下行发送波束发送的训练信号及由所述基站发送的所述N个下行发送波束的波束分组信息，N为大于零的整数；所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，T为小于N的正整数。

Description

一种波束选择方法及相关设备
本申请要求在2016年9月30日提交中国专利局、申请号为201610877396.7、发明名称为“一种波束选择方法及相关设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，特别涉及一种波束选择方法及相关设备。
背景技术
波束赋形是一种基于天线阵列的信号预处理技术，波束赋形通过调整天线阵列中每个阵元的加权系数产生具有指向性的波束，从而能够获得明显的阵列增益。因此，波束赋形技术在扩大覆盖范围、改善边缘吞吐量以及干扰一直等方面都有很大的优势。
目前，波束赋形主要针对基站侧和终端侧两端进行。对于下行方向，基站发送下行波束训练信号，终端测量下行波束训练信号，选择出最佳的基站发送波束，并将波束相关的信息反馈给基站，同时选择出对应的最佳接收波束，保存在本地。上行方向，终端发送上行波束训练信号，基站测量上行波束训练信号，选择出最佳的终端发送波束，将波束相关的信息传递给终端，同时选择出对应的最佳接收波束，保存在本地。上下行的收发波束训练好之后即可以进行数据传输。但是现有技术中，仅仅选择出最佳的发送波束及接收波束，但并未考虑选择出的发送波束及接收波束之间的空间独立性，从而降低数据传输的可靠性较低。
可见，现有技术中存在数据传输的可靠性低的技术问题。
发明内容
本发明实施例提供一种波束选择方法及相关设备，用于解决现有技术中存在数据传输的可靠性较低的技术问题。
本发明实施例提供的具体方案如下：
第一方面，本发明实施例提供了一种波束选择方法，包括：
终端接收由基站的N个下行发送波束发送的训练信号及由所述基站发送的所述N个下行发送波束的波束分组信息，N为大于零的整数；
所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，T为小于N的正整数。
可能的实施方式中，所述波束分组信息包括下列信息中的一种或者多种：
所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
可能的实施方式中，所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，包括：
所述终端根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束。
可能的实施方式中，所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，包括：
所述终端根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束；
相应的，在所述终端根据所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束的同时，所述方法还包括：
确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行接收波束中任意两个下行接收波束不同。
可能的实施方式中，在所述从所述N个下行发送波束中确定出T个下行发送波束的同时，所述方法还包括：
确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行发送波束中属于同一分组的下行发送波束对应的下行接收波束不同。
可能的实施方式中，在所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束之后，所述方法还包括：
所述终端将所述T个下行发送波束的相关信息发送给所述基站，以使所述基站基于所述T个下行发送波束确定向所述终端发送下行信号的下行发送波束。
第二方面，本发明实施例提供了一种波束选择方法，包括：
基站对用于发送训练信号的N个下行发送波束进行分组，N为大于零的整数；
所述基站将所述N个下行发送波束的波束分组信息发送给终端，以使所述终端根据所述波束分组信息从所述N个下行发送波束中确定出T个下行发送波束，T为小于或等于N的正整数。
可能的实施方式中，所述基站对用于发送训练信号的N个下行发送波束进行分组，包括：
所述基站根据波束的空间相关性，对所述N个下行发送波束进行分组；或
所述基站根据波束的空间指向性，对所述N个下行发送波束进行分组。
可能的实施方式中，所述波束分组信息具体包括下列信息中的一个或者多个：所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
可能的实施方式中，在所述基站将所述N个下行发送波束的波束分组信息发送给终端之后，所述方法还包括：
所述基站接收由所述终端发送的所述T个下行发送波束的相关信息。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中任意两个下行发送波束所对应的下行接收波束不同。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中属于同一个分组的两个下行发送波束所对应的下行接收波束不同。
可能的实施方式中，在所述接收由所述终端发送的所述T个下行发送波束的相关信息之后，所述方法还包括：
所述基站从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号同时通过所述至少两个下行发送波束发送给所述终端；或
所述基站从所述T个下行发送波束中选择至少两个下行发送波束，并将多个下行信号分别通过所述至少两个下行发送波束同时发送给所述终端；或
所述基站从所述T个下行发送波束中选择第一下行发送波束，并将下行信号通过所述第一下行发送波束发送给所述终端，其中，所述终端接收由所述第一下行发送波束发送的训练信号的信号质量为所述T个下行发送波束发送的训练信号中信号质量最好；或
所述基站从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号映射到不同时频资源上的多个子信号分别通过所述至少两个下行发送波束发送给所述终端。
第三方面，本发明实施例提供了一种终端，包括：
第一接收模块，用于接收由基站的N个下行发送波束发送的训练信号及由所述基站发送的所述N个下行发送波束的波束分组信息，N为大于零的整数；
第一确定模块，用于基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，T为小于N的正整数。
可能的实施方式中，所述波束分组信息包括下列信息中的一种或者多种：
所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每 个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
可能的实施方式中，所述第一确定模块用于：
根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束。
可能的实施方式中，所述第一确定模块用于：
根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束；
相应的，在所述终端根据所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束的同时，所述第一确定模块还用于：
确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行接收波束中任意两个下行接收波束不同。
可能的实施方式中，在所述从所述N个下行发送波束中确定出T个下行发送波束的同时，所述第一确定模块还用于：
确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行发送波束中属于同一分组的下行发送波束对应的下行接收波束不同。
可能的实施方式中，在所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束之后，所述终端还包括：
第一发送模块，用于将所述T个下行发送波束的相关信息发送给所述基站，以使所述基站基于所述T个下行发送波束确定向所述终端发送下行信号的下行发送波束。
第四方面，本发明实施例还提供一种基站，包括：
第二分组模块，用于对用于发送训练信号的N个下行发送波束进行分组，N为大于零的整数；
第二发送模块，用于将所述N个下行发送波束的波束分组信息发送给终端，以使所述终端根据所述波束分组信息从所述N个下行发送波束中确定出T个下行发送波束，T为小于或等于N的正整数。
可能的实施方式中，所述第二分组模块用于：
所述基站根据波束的空间相关性，对所述N个下行发送波束进行分组；或
所述基站根据波束的空间指向性，对所述N个下行发送波束进行分组。
可能的实施方式中，所述波束分组信息具体包括下列信息中的一个或者多个：所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送 波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
可能的实施方式中，在所述基站将所述N个下行发送波束的波束分组信息发送给终端之后，所述基站还包括：
第二接收模块，用于接收由所述终端发送的所述T个下行发送波束的相关信息。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中任意两个下行发送波束所对应的下行接收波束不同。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中属于同一个分组的两个下行发送波束所对应的下行接收波束不同。
可能的实施方式中，在所述接收由所述终端发送的所述T个下行发送波束的相关信息之后，所述基站还包括：
第二选择模块，用于从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号同时通过所述至少两个下行发送波束发送给所述终端；或
从所述T个下行发送波束中选择至少两个下行发送波束，并将多个下行信号分别通过所述至少两个下行发送波束同时发送给所述终端；或
从所述T个下行发送波束中选择第一下行发送波束，并将下行信号通过所述第一下行发送波束发送给所述终端，其中，所述终端接收由所述第一下行发送波束发送的训练信号的信号质量为所述T个下行发送波束发送的训练信号中信号质量最好；或
从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号映射到不同时频资源上的多个子信号分别通过所述至少两个下行发送波束发送给所述终端。
第五方面，本发明实施例提供了一种终端，该终端主要包括处理器、存储器和收发机，其中，收发机在处理器的控制下接收和发送数据，存储器中保存有预设的程序，处理器读取存储器中的程序，按照该程序执行以下过程：
通过收发机接收由基站的N个下行发送波束发送的训练信号及由所述基站发送的所述N个下行发送波束的波束分组信息，N为大于零的整数；
基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，T为小于N的正整数。
可能的实施方式中，所述波束分组信息包括下列信息中的一种或者多种：
所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
可能的实施方式中，处理器根据所述终端根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束。
可能的实施方式中，处理器根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束；
相应的，处理器确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行接收波束中任意两个下行接收波束不同。
可能的实施方式中，处理器确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行发送波束中属于同一分组的下行发送波束对应的下行接收波束不同。
可能的实施方式中，处理器指示收发机将所述T个下行发送波束的相关信息发送给所述基站，以使所述基站基于所述T个下行发送波束确定向所述终端发送下行信号的下行发送波束。
第六方面，本发明实施例提供一种基站，包括：处理器、存储器和收发机，其中，收发机在处理器的控制下接收和发送数据，存储器中保存有预设的程序，处理器读取存储器中的程序，按照该程序执行以下过程：
对用于发送训练信号的N个下行发送波束进行分组，N为大于零的整数；
指示收发机将所述N个下行发送波束的波束分组信息发送给终端，以使所述终端根据所述波束分组信息从所述N个下行发送波束中确定出T个下行发送波束，T为小于或等于N的正整数。
可能的实施方式中，处理器根据波束的空间相关性，对所述N个下行发送波束进行分组；或
处理器根据波束的空间指向性，对所述N个下行发送波束进行分组。
可能的实施方式中，所述波束分组信息具体包括下列信息中的一个或者多个：所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
可能的实施方式中，处理器指示收发机接收由所述终端发送的所述T个下行发送波束的相关信息。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中任意两个下行发送波束所对应的下行接收波束不同。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中属于同一个分组的两个下行发送波束所对应的下行接收波束不同。
可能的实施方式中，处理器所述基站从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号同时通过所述至少两个下行发送波束发送给所述终端；或
从所述T个下行发送波束中选择至少两个下行发送波束，并将多个下行信号分别通过所述至少两个下行发送波束同时发送给所述终端；或
从所述T个下行发送波束中选择第一下行发送波束，并将下行信号通过所述第一下行发送波束发送给所述终端，其中，所述终端接收由所述第一下行发送波束发送的训练信号的信号质量为所述T个下行发送波束发送的训练信号中信号质量最好；或
从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号映射到不同时频资源上的多个子信号分别通过所述至少两个下行发送波束发送给所述终端。
基于上述技术方案，本发明实施例中，终端接收由基站的N个下行发送波束发送的训练信号及由所述基站发送的所述N个下行发送波束的波束分组信息，N为大于零的整数；所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，T为小于N的正整数，从而使得确定出的T个下行发送波束之间具有较好空间独立性，保证了数据传输的可靠性，进而解决了现有技术中存在数据传输的可靠性低的技术问题。
附图说明
图1为本发明实施例中提供一种波束选择方法的具体实现流程图；
图2为本发明实施例中提供的另一种波束选择方法的具体实现流程图；
图3为本发明实施例中提供的一种终端的结构示意图；
图4为本发明实施例中提供的一种基站的结构示意图；
图5为本发明实施例中提供的另一种终端的结构示意图；
图6为本发明实施例中提供的另一种基站的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例中，如图1所示，波束选择的具体过程如下：
步骤101：终端接收由基站的N个下行发送波束发送的训练信号及由所述基站发送的所述N个下行发送波束的波束分组信息，N为大于零的整数。
在本发明实施例中，若终端具有M个接收波束，则N以4，M以4为例，这样，终端接收到的接收信号则为snm，snm为终端用第m个下行接收波束接收基站的第n个下行发送波束得到的接收信号，并snm本身可以为时域信号或者频域信号，并且snm为一个信号序列。
本发明实施例中，所述波束分组信息包括下列信息中的一种或者多种：
所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
继续沿用上述举例，波束分组信息包括：4个下行发送波束的分组组数，如：4个下行发送波束被分为4组、3组或者为2组等。
相应的，每个分组中下行发送波束的数量，如：分为4组时，每组中包含1个下行发送波束；分为2组时，每组中包含2个下行发送波束，或一组中包含1个下行发送波束，另一组中包含3个下行发送波束。
每个分组中每个下行发送波束的波束标识信息，如：分为4组时，每组中包含的波束标识信息为：x0、x1、x2、x3。波束标识信息的取值范围为：0,1,2,…N-1。
相应的，与每个下行发送波束对应的训练信号的信号标识信息，如：分为4组时，每组中包含的下行发送波束的训练信号的信号标识信息为：y0、y1、y2、y3，信号标识信息的取值范围为：0,1,2,…N-1。
步骤102：所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，T为小于N的正整数。
在本发明实施例中，步骤102的具体实现过程，具体包括如下步骤：
第一步骤：所述终端基于所述训练信号，从所述N个下行发送波束中确定出Q个下行发送波束，Q为大于零的整数；
第二步骤：所述终端根据所述波束分组信息，从所述Q个下行发送波束中确定出T个下行发送波束，T小于或等于Q。
本发明实施例中，基于训练信号，从N个下行发送波束中确定出Q个下行发送波束，具体包括但不限于以下三种方式，具体的：
第一种：根据终端接收到的接收信号的接收功率，确定出接收功率大于预设功率的Q个接收信号，然后确定与这Q个接收信号对应的Q个下行发送波束。
本发明实施例中，预设功率具体可以为：5毫瓦、7毫瓦或8毫瓦，或者为其它预设 功率值。在具体实现过程中，预设功率以5毫瓦，以第一个接收波束的接收信号为例，若第一个接收波束的每个接收信号的功率为：6毫瓦、4毫瓦、7毫瓦、8毫瓦，则超过预设功率的接收信号为s11、s31、s41，则对应的下行发送波束为第一、第三、第四下行发送波束，基于此，则可以确定出每个下行接收波束对应的下行发送波束。
第二种：根据终端接收到的接收信号的信干噪比，确定出信干噪比大于预设信干噪比的Q个接收信号，然后确定与这Q个接收信号对应的Q个下行发送波束。
第三种：根据终端接收到的接收信号的信噪比，确定出信比大于预设信噪比的Q个接收信号，然后确定与这Q个接收信号对应的Q个下行发送波束。
在确定出Q个下行发送波束之后，则根据波束分组信息，从Q个下行发送波束中选择出T个下行发送波束。
本发明实施例中，根据波束分组信息，确定T个下行发送波束，包括但不限于以下三种实现方式，具体的：
第一种，所述终端根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出属于不同分组的T个下行发送波束。
本发明实施例中，4个下行发送波束以A、B、C、D为代表，4个下行接收波束以A′、B′、C′、D′为代表，且下行发送波束的分组信息表示，下行发送波束中AB为一组，CD为一组。若确定出的Q个下行发送波束具体为：A′(A B)；B′(A)；C′(C D)；D′(B D)，其中，A′(A B)表示，与下行接收波束A′对应的下行发送波束，确定出T个下行发送波束则为下行发送波束A和下行发送波束D。
第二种，所述终端根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出属于不同分组的T个下行发送波束；
相应的，在所述终端根据所述波束分组信息，从所述N个下行发送波束中确定出属于不同分组的T个下行发送波束的同时，所述方法还包括：
确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行接收波束中任意两个下行接收波束不同。
本发明实施例中，4个下行发送波束以A、B、C、D为代表，4个下行接收波束以A′、B′、C′、D′为代表，且下行发送波束的分组信息表示，下行发送波束中AB为一组，CD为一组。若确定出的Q个下行发送波束具体为：A′(A B)；B′(A)；C′(C D)；D′(B D)，确定出T个下行发送波束则为下行发送波束A和下行发送波束D。
在确定出T个下行发送波束之后，还确定与T个下行发送波束对应的T个下行接收波束，且T个下行接收波束中任意两个下行接收波束不同。
本发明实施例中，终端根据训练信号，确定P个下行接收波束，所述P个下行接收波束可以是针对所有的下行发送波束的下行接收波束，也可以是仅仅针对T个下行发送波束对应的下行接收波束，在本申请实施例中不作具体限定。
本发明实施例中，P个下行接收波束以针对所有的下行发送波束的下行接收波束为例，对从M个下行接收波束中确定出P个下行接收波束的实现方式进行详细描述，具体包括但不限于以下三种方式：
第一种：根据终端接收到的接收信号的接收功率，确定出接收功率大于预设功率的P个接收信号，然后确定与这P个接收信号对应的P个下行接收波束。
在本发明实施例中，预设功率具体可以为：5毫瓦、7毫瓦或8毫瓦，或者为其它预设功率值。在具体实现过程中，预设功率以5毫瓦，以4个接收波束接收由第一个发送波束的接收信号为例，若4个接收波束分别接收的接收信号的功率为：6毫瓦、4毫瓦、7毫瓦、8毫瓦，则超过预设功率的接收信号为s11、s13、s14，则对应的下行接收波束为第一、第三、第四下行接收波束，基于此，则可以确定出每个下行发送波束对应的下行接收波束。
第二种：根据终端接收到的接收信号的信干噪比，确定出信干噪比大于预设信干噪比的P个接收信号，然后确定与这P个接收信号对应的P个下行接收波束。
第三种：根据终端接收到的接收信号的信噪比，确定出信比大于预设信噪比的P个接收信号，然后确定与这P个接收信号对应的P个下行接收波束。
本发明实施例中，若确定出的P个下行接收波束具体为：A(A′ B′)；B(A′)；C(C′ D′)；D(B′ D′)，则确定与T个下行发送波束对应的接收波束应该为A′和D′，而不是B′和B′。
第三种，确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行发送波束中属于同一分组的下行发送波束对应的下行接收波束不同。
本发明实施例中，4个下行发送波束以A、B、C、D为代表，4个下行接收波束以A′、B′、C′、D′为代表，且下行发送波束的分组信息表示，将下行发送波束AB分为一组，将下行发送波束CD分为一组。若确定出的Q个下行发送波束具体为：A′(A)；B′(B)；C′(C)；D′(D)，从Q个下行发送波束中确定出的T个下行发送波束为：属于同一分组的A、B下行发送波束和属于同一分组的C、D下行发送波束。
在确定出T个发送波束之后，还确定与T个发送波束对应的T个接收波束，且T个下行接收波束中与属于同一分组的下行发送波束对应的下行接收波束不同，即下行发送波束AB的下行接收波束不同，下行发送波束CD的下行接收波束不同。
本发明实施例中，若确定出的P个下行接收波束具体为：A(A′ B′)；B(A′)；C (C′ D′)；D(B′ D′)，则确定与T个下行发送波束对应的下行接收波束分别为A(B′)；B(A′)；C(C′)D(B′)；或C(D′)D(B′)；或C(C′)D(D′)。
本发明实施例中，对于步骤101及步骤102还包括如下实现方式，下面则进行详细描述：
步骤101：终端接收由基站的N个下行发送波束发送的训练信号及由所述基站发送的所述N个下行发送波束的波束分组信息，N为大于零的整数。
在本发明实施例中，若终端具有M个接收波束，这样，终端接收到的接收信号则为snm，snm为终端用第m个下行接收波束接收基站的第n个下行发送波束得到的接收信号，并snm本身可以为时域信号或者频域信号，并且snm为一个信号序列。
本发明实施例中，所述波束分组信息包括下列信息中的一种或者多种：
所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
例如N＝16，波束分组信息包括：16个下行发送波束的分组组数，例如分为2组，4组，或者8组。
相应的，每个分组中下行发送波束的数量，如：分为4组时，每组中包含4个下行发送波束；分为2组时，每组中包含8个下行发送波束。
每个分组中每个下行发送波束的波束标识信息，如：分为4组，每组4个下行发送波束时，第n组中包含的波束标识信息为：xn0、xn1、xn2、xn3。波束标识信息的取值范围为：0,1,2,…N-1。
相应的，与每个下行发送波束对应的训练信号的信号标识信息，如：分为4组时，第n组中包含的下行发送波束的训练信号的信号标识信息为：yn0、yn1、yn2、yn3，信号标识信息的取值范围为：0,1,2,…N-1。
步骤102：所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，T为小于N的正整数。
关于T的取值，可以由基站确定，通知终端，或者在协议中约定为固定值，或者终端根据信号的测量结果确定T的取值。
在本发明实施例中，步骤102的具体实现过程，具体包括如下步骤：
第一步骤：终端分别用每个下行接收波束接收N个下行发送波束的训练信号，得到MN个接收信号，根据MN个接收信号计算MN个接收功率值， Pnm,n＝0,1,2,…N-1,m＝0,1,2,…M-1为第m个下行接收波束接收第n个下行发送波束的训练信号的接收功率值。
实际系统中，由于信道衰落等的影响，终端不一定能收到MN个接收信号，有可能只能收到其中的一部分信号，例如，只收到其中的几个下行发送波束的信号，后续的计算过程可以只基于接收到的信号进行，原理相同，不再赘述。
第二步骤：对于每个下行发送波束，确定其对应的下行接收波束，例如对于下行发送波束n，其对应的接收波束可以按照如下方式确定：
Figure PCTCN2017087489-appb-000001
对于每个下行发送波束，确定该下行发送波束的接收信号功率为该下行发送波束对应的接收波束接收到的信号功率，即
Figure PCTCN2017087489-appb-000002
第三步骤：所述终端根据所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，T小于或等于N。
这里以接收功率值为例进行描述，实际实现时也可以用接收信干噪比，接收信噪比，接收信道容量等指标进行计算。
本发明实施例中，根据波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，包括但不限于以下三种实现方式，具体的：
第一种，所述终端根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出属于不同分组的T个下行发送波束。
以N＝4，M＝4为例，本发明实施例中，4个下行发送波束以A、B、C、D为代表，4个下行接收波束以A′、B′、C′、D′为代表，且下行发送波束的分组信息表示，下行发送波束中AB为一组，CD为一组。确定出T个下行发送波束则为下行发送波束A和下行发送波束D。这里T＝2。
具体的确定过程可以为：终端先从所有的下行发送波束中选择接收功率最高的下行发送波束作为T个波束中的第一个波束，不妨设为下行发送波束A；然后终端再从除去下行发送波束A所在的分组中的所有波束之外的其他波束中选择接收功率最高的波束为T个波束中的第二个波束，本例中第二个波束为下行发送波束D。如果T大于2，其选择过程类似：从N个下行发送波束中除去已经选择出的波束所在的分组中的所有波束，从其余的波束中选择出接收功率最高的一个波束。
如果T的取值由终端确定，可以预先设定一个接收信号功率的阈值，终端在确定下行 发送波束时，先将所有接收功率小于阈值的下行发送波束排除掉，再从剩余的波束中按照前述过程确定下行发送波束，所能确定出的下行发送波束的个数，即为T的取值。
第二种，所述终端根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出属于不同分组的T个下行发送波束；
相应的，在所述终端根据所述波束分组信息，从所述N个下行发送波束中确定出属于不同分组的T个下行发送波束的同时，所述方法还包括：
确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行接收波束中任意两个下行接收波束不同。
以N＝4，M＝4为例，本发明实施例中，4个下行发送波束以A、B、C、D为代表，4个下行接收波束以A′、B′、C′、D′为代表，且下行发送波束的分组信息表示，下行发送波束中AB为一组，CD为一组。确定出T个下行发送波束则为下行发送波束A和下行发送波束C。
具体的确定过程可以为：终端先从所有的下行发送波束中选择接收功率最高的下行发送波束作为T个波束中的第一个波束，不妨设为下行发送波束A；然后终端再从N个下行发送波束中除去如下两类下行发送波束：
a)下行发送波束A所在的分组中的所有波束；
b)对应的下行接收波束与下行发送波束A对应的下行接收波束相同的下行发送波束(即如果一个下行发送波束对应的下行接收波束与下行发送波束A对应的下行接收波束相同，则该下行发送波束要被排除掉)；
终端从其余的下行发送波束中选择接收功率最高的波束为T个波束中的第二个波束。本例中假设下行发送波束D与下行发送波束A对应的下行接收波束相同，则第二个波束为下行发送波束C。如果T大于2，其选择过程类似：除去如下两类波束，从其余的波束中选择出接收功率最高的一个波束：
a)已经选择出的下行发送波束所在的分组中的所有下行发送波束；
b)对应的下行接收波束与已经选择出的下行发送波束对应的下行接收波束相同的下行发送波束(即如果一个下行发送波束对应的下行接收波束与已经选择出的任意一个下行发送波束对应的下行接收波束相同，则该下行发送波束要被排除掉)。
如果T的取值由终端确定，可以预先设定一个接收信号功率的阈值，终端在确定下行发送波束时，先将所有接收功率小于阈值的下行发送波束排除掉，再从剩余的波束中按照前述过程确定下行发送波束，所能确定出的下行发送波束的个数，即为T的取值。
第三种，所述终端根据所述训练信号及所述波束分组信息，从所述N个下行发送波束 中确定出T个下行发送波束；且所述T个下行发送波束中任意两个对应的下行接收波束不同。
以N＝4，M＝4为例，本发明实施例中，4个下行发送波束以A、B、C、D为代表，4个下行接收波束以A′、B′、C′、D′为代表，且下行发送波束的分组信息表示，下行发送波束中AB为一组，CD为一组。确定出T个下行发送波束则为下行发送波束A和下行发送波束B。
具体的确定过程可以为：终端先从所有的下行发送波束中选择接收功率最高的下行发送波束作为T个波束中的第一个波束，不妨设为下行发送波束A；然后终端再从N个下行发送波束中除去如下下行发送波束：对应的下行接收波束与下行发送波束A对应的下行接收波束相同的下行发送波束(即如果一个下行发送波束对应的下行接收波束与下行发送波束A对应的下行接收波束相同，则该下行发送波束要被排除掉)；
终端从其余的下行发送波束中选择接收功率最高的波束为T个波束中的第二个波束。本例中假设下行发送波束D与下行发送波束A对应的下行接收波束相同，其余的下行发送波束中下行发送波束B的接收功率最高，因此第二个波束为下行发送波束B。如果T大于2，其选择过程类似：除去如下波束，从其余的波束中选择出接收功率最高的一个波束：
对应的下行接收波束与已经选择出的下行发送波束对应的下行接收波束相同的下行发送波束(即如果一个下行发送波束对应的下行接收波束与已经选择出的任意一个下行发送波束对应的下行接收波束相同，则该下行发送波束要被排除掉)。
如果T的取值由终端确定，可以预先设定一个接收信号功率的阈值，终端在确定下行发送波束时，先将所有接收功率小于阈值的下行发送波束排除掉，再从剩余的波束中按照前述过程确定下行发送波束，所能确定出的下行发送波束的个数，即为T的取值。
本发明实施例中，在执行完步骤102之后，所述方法还包括：
所述终端将所述T个下行发送波束的相关信息发送给所述基站，以使所述基站基于所述T个下行发送波束确定向所述终端发送下行信号的下行发送波束。
本发明实施例中，下行发送波束的相关信息包括T个下行发送波束的波束标识，如：下行发送波束的编号，q0、q1、q2…qT-1。在具体实现过程中，根据下行发送波束或与下行发送波束对应的训练信号的复用方式不同，终端反馈的T个下行发送波束的信息可以不同，如：训练信号在不同OFDM符号或者子帧时分复用，终端测量并反馈选择的下行时间信息；或训练信号在不同频率资源复用，终端测量并反馈选择的下行频率信息，进一步，下行发送波束的相关信息中还可以包括终端接收到的接收信号的信号强度信息，如：接收信号的功率。
本发明实施例中，终端需要保存T个下行发送波束对应的下行接收波束，及T个下行发送波束与下行接收波束的对应关系。在具体实现过程中，在终端保存所有下行发送波束对应的下行接收波束时，并保存下行发送波束与下行接收波束的应关系时，对应关系中用于表示下行接收波束的具体可以为下行接收波束的编号，也可以是下行接收波束对应的波束赋形权值本身，本领域普通技术人员可以根据实际需要进行选择，在本申请实施例中不作具体限定。
本发明实施例中，如图2所示，波束选择的具体过程如下：
步骤201：基站对用于发送训练信号的N个下行发送波束进行分组，N为大于零的整数。
本发明实施例中，基站可以为每个下行发送波束发射一个训练信号，如：有N下行发送波束，基站则发送N个训练信号。这N个训练信号之间可以采用TDM(Time Division Multiplexing，时分复用)、CDM(Code Division Multiplexing，码分复用)、FDM(Frequency Division Multiplexing，频分复用)或者为上述三种方式中任意两种或多种方式的组合，本领域普通技术人员可以根据实际需要进行设置，在本申请实施例中不作具体限定。
在本发明实施例中，以OFDM(Orthodonal Frequecy Division Multuplexing，正交频分复用)为基础的系统为例，对训练信号的发送方式进行详细描述，N个训练信号可以占用N个OFDM符号，每个训练信号占用一个OFDM符号，训练信号之间为TDM复用；也可以在一个OFDM符号中发射多个训练信号，这多个训练信号之间是FDM复用或CDM复用。
本发明实施例中，若基站的天线阵列为线性阵列，则下行发送波束的权值可以由过采样的DFT向量组成。对于线性阵列，假设天线振子数为N1，过采样率因子为O1，则过采样的DFT向量有个O1N1个，具体为：
Figure PCTCN2017087489-appb-000003
k＝0,1,2,…N1O1-1
对于平面阵列，下行发送波束的权值可以由过采样的2D DFT向量组成。假设第一维和第二维度的天线阵子数分别为N1、N2，并且两个维度的过采样率因子分别为O1、O2，则过采样的DFT向量有O1O2N1N2个：
Figure PCTCN2017087489-appb-000004
k＝0，1，…，N1O1-1；l＝0，1，…N2O2
Figure PCTCN2017087489-appb-000005
本发明实施例中，步骤201的具体实现过程包括但不限于以下两种实现方式，具体的：
第一种，所述基站根据波束的空间相关性，对所述N个下行发送波束进行分组。
本发明实施例中，若下行发送波束1的权值为a，下行发送波束2的权值为b，则下行发送波束1和下行发送波束2的空间相关性为
Figure PCTCN2017087489-appb-000006
然后将空间相关性高于预设值的下行发送波束分为一组。
其中，以阵列天线为例，例如分为N1组，每组O1个波束，第n组下行发送波束对应的权值为
Figure PCTCN2017087489-appb-000007
以平面天线为例，例如分为N1N2组，每组O1O2个波束，第n1n2(n1＝0,1,…N1-1；n2＝0,1,…N2-1)组波束对应的权值包括：
{zk，l|k＝n1O1，n1O1+1，…，(n1+1)O1-1；l＝n2O2，n2O2+1，(n2+1)O2-1}
第二种，所述基站根据波束的空间指向性，对所述N个下行发送波束进行分组。
本发明实施例中，波束的空间指向性指的是波束在空间的方向，然后将下行发送波束的空间指向在一定角度范围内，如：0°～250°，250°～360°的分为一组。具体的，N以4为例，四个下行发送波束在空间的方向分别为230°、250°、320°、350°，那么则将方向为230°和250°的分为一组，将方向为320°和350°的分为一组。
本发明实施例中，所述波束分组信息具体包括下列信息中的一个或者多个：所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
继续沿用上述举例，波束分组信息包括：4个下行发送波束的分组组数，如：4个下行发送波束被分为4组、3组或者为2组等。
相应的，每个分组中下行发送波束的数量，如：分为4组时，每组中包含1个下行发送波束；分为2组时，每组中包含2个下行发送波束，或一组中包含1个下行发送波束，另一组中包含3个下行发送波束。
每个分组中每个下行发送波束的波束标识信息，如：分为4组时，每组中包含的波束标识信息为：x0、x1、x2、x3。波束标识信息的取值范围为：0,1,2,…N-1。
相应的，与每个下行发送波束对应的训练信号的信号标识信息，如：分为4组时，每 组中包含的下行发送波束的训练信号的信号标识信息为：y0、y1、y2、y3，信号标识信息的取值范围为：0,1,2,…N-1。
步骤202：所述基站将所述N个下行发送波束的波束分组信息发送给终端，以使所述终端根据所述波束分组信息从所述N个下行发送波束中确定出T个下行发送波束，T为小于或等于N的正整数。
本发明实施例中，在基站对用于发送训练信号的N个下行发送波束进行分组之后，则将N个下行发送波束的波束分组信息发送给终端，以使终端能够根据基站发送的波束分组信息从N个下行发送波束中确定用于发送下行信号的T个下行发送波束。
本发明实施例中，在所述基站将所述N个下行发送波束的波束分组信息发送给终端之后，所述方法还包括：
所述基站接收由所述终端发送的所述T个下行发送波束的相关信息。
本发明实施例中，下行发送波束的相关信息包括T个下行发送波束的波束标识，如：下行发送波束的编号，q0、q1、q2…qT-1。
本发明实施例中，所述T个下行发送波束分别属于不同的分组。
本发明实施例中，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中任意两个下行发送波束所对应的下行接收波束不同。
本发明实施例中，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中属于同一个分组的两个下行发送波束所对应的下行接收波束不同。
本发明实施例中，T个下行发送波束满足下列条件之一或者组合，具体的：
第一、T个下行发送波束属于不同的分组，也就是说从每个分组中最多选择出一个作为推荐的下行发送波束；
第二、T个下行发送波束中如果有两个下行发送波束属于同一分组，则这两个下行发送波束对应的下行接收波束不同；
第三、T个下行发送波束属于不同的分组，并且T个下行发送波束中任意两个下行发送波束对应的下行接收波束不同。
本发明实施例中，在所述接收由所述终端发送的所述T个下行发送波束的相关信息之后，所述方法还包括：
所述基站从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号同时通过所述至少两个下行发送波束发送给所述终端；或
所述基站从所述T个下行发送波束中选择至少两个下行发送波束，并将多个下行信号分别通过所述至少两个下行发送波束同时发送给所述终端；或
所述基站从所述T个下行发送波束中选择第一下行发送波束，并将下行信号通过所述第一下行发送波束发送给所述终端，其中，所述终端接收由所述第一下行发送波束发送的训练信号的信号质量为所述T个下行发送波束发送的训练信号中信号质量最好；或
所述基站从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号映射到不同时频资源上的多个子信号分别通过所述至少两个下行发送波束发送给所述终端。
在具体实现过程中，基站根据终端发送的T个下行发送波束的相关信息，能够通过以下但不限于以下几种信号传输方式进行传输：
第一种，发送分集传输。
基站从终端推荐的T个下行发送波束中选择至少两个下行发送波束，以下行发送波束A和下行发送波束B为例，在选定下行发送波束之后，则将信号si分别通过下行发送波束A和下行发送波束B发送给终端，这样信号si则通过不同的空间路径传输，从而保证终端能够接收到多个统计独立、携带同一信息的接收信号，然后把接收到的多个接收信号进行合并或选择其中信号质量最好的接收信号，以降低衰落的影响，从而达到提高信号传输的可靠性的技术效果。
第二种，空分复用传输。
基站从终端推荐的T个下行发送波束中选择至少两个下行发送波束，以下行发送波束A和下行发送波束B为例，在选定下行发送波束之后，将多个信号，如：s1、s2、s3通过下行发送波束A和下行发送波束B同时发送，其中，信号si可以通过下行发送波束A或下行发送波束B或者下行发送A和下行发送B发送出去，在本申请实施例中，不作具体限定。
第三种，波束选择传输。
本发明实施例中，由于基站会接收到由终端反馈的T个下行发送波束的相关信息，其中包含与由T个下行发送波束发送的训练信号对应的接收信号的接收功率。因此，基站可以根据接收信号的接收功率，从中确定出接收功率最强的接收信号，进而确定与该接收信号对应的下行发送波束，作为第一下行发送波束。相应的，通过第一下行发送波束发送下行信号si。
在具体实现过程中，在基站检测到当前的下行发送波束出现问题之后，如：连续的接收到NACK(Negative Acknowledgement，否定应答)，或接收不到任何反馈信息，基站可以将信号切换到其它下行发送波束上进行传输。由于本发明实施例保证了终端推荐的T个下行发送波束之间具有足够的空间隔离度，从而避免T个下行发送波束同时出现问题，如： T个下行发送波束同时遮挡，的概率大大降低，这样，基站通过下行发送波束的切换，能够恢复下行信号的传输，进而达到提高数据传输可靠性的技术效果。
第四种，波束切换传输。
基站从终端推荐的T个下行发送波束中选择至少两个下行发送波束，以下行发送波束A和下行发送波束B为例，在选定下行发送波束之后，将下行信号si映射到不同时频资源上的多个子信号，通过不同的下行发送波束发送。同样的，由于本发明实施例保证了终端推荐的T个下行发送波束之间具有足够的空间隔离度，从而避免每个子信号受到相同的影响，从而保证数据传输的可靠性。
基于同一发明构思，本发明实施例中提供了一种终端，该终端的具体实施可参见方法实施例部分的描述，重复之处不再赘述，如图3所示，该终端主要包括：
第一接收模块301，用于接收由基站的N个下行发送波束发送的训练信号及由所述基站发送的所述N个下行发送波束的波束分组信息，N为大于零的整数；
第一确定模块302，用于基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，T为小于N的正整数。
可能的实施方式中，所述波束分组信息包括下列信息中的一种或者多种：
所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
可能的实施方式中，所述第一确定模块302用于：
根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束。
可能的实施方式中，所述第一确定模块302用于：
根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束；
相应的，在所述终端根据所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束的同时，所述第一确定模块302还用于：
确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行接收波束中任意两个下行接收波束不同。
可能的实施方式中，在所述从所述N个下行发送波束中确定出T个下行发送波束的同时，所述第一确定模块302还用于：
确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行发送波束中 属于同一分组的下行发送波束对应的下行接收波束不同。
可能的实施方式中，在所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束之后，所述终端还包括：
第一发送模块303，用于将所述T个下行发送波束的相关信息发送给所述基站，以使所述基站基于所述T个下行发送波束确定向所述终端发送下行信号的下行发送波束。
基于同一发明构思，本发明实施例提供一种基站，该基站的具体实施可参见方法实施例部分的描述，重复之处不再赘述，如图4所示，该基站主要包括：
第二分组模块401，用于对用于发送训练信号的N个下行发送波束进行分组，N为大于零的整数；
第二发送模块402，用于将所述N个下行发送波束的波束分组信息发送给终端，以使所述终端根据所述波束分组信息从所述N个下行发送波束中确定出T个下行发送波束，T为小于或等于N的正整数。
可能的实施方式中，所述第二分组模块401用于：
所述基站根据波束的空间相关性，对所述N个下行发送波束进行分组；或
所述基站根据波束的空间指向性，对所述N个下行发送波束进行分组。
可能的实施方式中，所述波束分组信息具体包括下列信息中的一个或者多个：所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
可能的实施方式中，在所述基站将所述N个下行发送波束的波束分组信息发送给终端之后，所述基站还包括：
第二接收模块403，用于接收由所述终端发送的所述T个下行发送波束的相关信息。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中任意两个下行发送波束所对应的下行接收波束不同。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中属于同一个分组的两个下行发送波束所对应的下行接收波束不同。
可能的实施方式中，在所述接收由所述终端发送的所述T个下行发送波束的相关信息之后，所述基站还包括：
第二选择模块404，用于从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号同时通过所述至少两个下行发送波束发送给所述终端；或
从所述T个下行发送波束中选择至少两个下行发送波束，并将多个下行信号分别通过 所述至少两个下行发送波束同时发送给所述终端；或
从所述T个下行发送波束中选择第一下行发送波束，并将下行信号通过所述第一下行发送波束发送给所述终端，其中，所述终端接收由所述第一下行发送波束发送的训练信号的信号质量为所述T个下行发送波束发送的训练信号中信号质量最好；或
从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号映射到不同时频资源上的多个子信号分别通过所述至少两个下行发送波束发送给所述终端。
基于同一发明构思，本发明实施例提供了一种终端，该终端的具体实施可参见方法实施例部分的描述，重复之处不再赘述，如图5所示，该终端主要包括包括处理器501、存储器502和收发机503，处理器501、存储器502与收发机503通过总线架构连接，总线架构可以包括任意数量的互联的总线和桥，具体由处理器501代表的一个或多个处理器和存储器502代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机503可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。其中，收发机503在处理器501的控制下接收和发送数据，存储器502中保存有预设的程序，处理器501读取存储器502中的程序，按照该程序执行以下过程：
通过收发机503接收由基站的N个下行发送波束发送的训练信号及由所述基站发送的所述N个下行发送波束的波束分组信息，N为大于零的整数；
基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，T为小于N的正整数。
可能的实施方式中，所述波束分组信息包括下列信息中的一种或者多种：
所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
可能的实施方式中，处理器501根据所述终端根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束。
可能的实施方式中，处理器501根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束；
相应的，处理器501确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行接收波束中任意两个下行接收波束不同。
可能的实施方式中，处理器501确定与所述T个下行发送波束对应的T个下行接收波 束，且所述T个下行发送波束中属于同一分组的下行发送波束对应的下行接收波束不同。
可能的实施方式中，处理器501指示收发机503将所述T个下行发送波束的相关信息发送给所述基站，以使所述基站基于所述T个下行发送波束确定向所述终端发送下行信号的下行发送波束。
第六方面，本发明实施例提供一种基站，该基站的具体实施可参见方法实施例部分的描述，重复之处不再赘述，如图6所示，该基站主要包括：处理器601、存储器602和收发机603，处理器601、存储器602和收发机603之间通过总线架构连接，总线架构可以包括任意数量的互联的总线和桥，具体由处理器601代表的一个或多个处理器和存储器602代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机603可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备，用户接口604还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。其中，收发机603在处理器的控制下接收和发送数据，存储器602中保存有预设的程序，处理器601读取存储器602中的程序，按照该程序执行以下过程：
对用于发送训练信号的N个下行发送波束进行分组，N为大于零的整数；
指示收发机603将所述N个下行发送波束的波束分组信息发送给终端，以使所述终端根据所述波束分组信息从所述N个下行发送波束中确定出T个下行发送波束，T为小于或等于N的正整数。
可能的实施方式中，处理器601根据波束的空间相关性，对所述N个下行发送波束进行分组；或
处理器601根据波束的空间指向性，对所述N个下行发送波束进行分组。
可能的实施方式中，所述波束分组信息具体包括下列信息中的一个或者多个：所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
可能的实施方式中，处理器601指示收发机603接收由所述终端发送的所述T个下行发送波束的相关信息。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中任意两个下行发送波束所对应的下行接收波束不同。
可能的实施方式中，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中属于同一个分组的两个下行发送波束所对应的下行接收波束不同。
可能的实施方式中，处理器601所述基站从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号同时通过所述至少两个下行发送波束发送给所述终端；或
从所述T个下行发送波束中选择至少两个下行发送波束，并将多个下行信号分别通过所述至少两个下行发送波束同时发送给所述终端；或
从所述T个下行发送波束中选择第一下行发送波束，并将下行信号通过所述第一下行发送波束发送给所述终端，其中，所述终端接收由所述第一下行发送波束发送的训练信号的信号质量为所述T个下行发送波束发送的训练信号中信号质量最好；或
从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号映射到不同时频资源上的多个子信号分别通过所述至少两个下行发送波束发送给所述终端。
基于上述技术方案，本发明实施例中，终端接收由基站的N个下行发送波束发送的训练信号及由所述基站发送的所述N个下行发送波束的波束分组信息，N为大于零的整数；所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，T为小于N的正整数，从而使得确定出的T个下行发送波束之间具有空间独立性，保证了数据传输的可靠性，进而解决了现有技术中存在数据传输的可靠性低的技术问题。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实施例的精神和范围。这样，倘若本发明实施例的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (30)

  1. 一种波束选择方法，其特征在于，包括：
    终端接收由基站的N个下行发送波束发送的训练信号及由所述基站发送的所述N个下行发送波束的波束分组信息，N为大于零的整数；
    所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，T为小于N的正整数。
  2. 如权利要求1所述的方法，其特征在于，所述波束分组信息包括下列信息中的一种或者多种：
    所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
  3. 如权利要求1所述的方法，其特征在于，所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，包括：
    所述终端根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束。
  4. 如权利要求1所述的方法，其特征在于，所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，包括：
    所述终端根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束；
    相应的，在所述终端根据所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束的同时，所述方法还包括：
    确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行接收波束中任意两个下行接收波束不同。
  5. 如权利要求1所述的方法，其特征在于，在所述从所述N个下行发送波束中确定出T个下行发送波束的同时，所述方法还包括：
    确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行发送波束中属于同一分组的下行发送波束对应的下行接收波束不同。
  6. 如权利要求1-5任一权项所述的方法，其特征在于，在所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束之后，所述方法还包括：
    所述终端将所述T个下行发送波束的相关信息发送给所述基站，以使所述基站基于所述T个下行发送波束确定向所述终端发送下行信号的下行发送波束。
  7. 一种波束选择方法，其特征在于，包括：
    基站对用于发送训练信号的N个下行发送波束进行分组，N为大于零的整数；
    所述基站将所述N个下行发送波束的波束分组信息发送给终端，以使所述终端根据所述波束分组信息从所述N个下行发送波束中确定出T个下行发送波束，T为小于或等于N的正整数。
  8. 如权利要求7所述的方法，其特征在于，所述基站对用于发送训练信号的N个下行发送波束进行分组，包括：
    所述基站根据波束的空间相关性，对所述N个下行发送波束进行分组；或
    所述基站根据波束的空间指向性，对所述N个下行发送波束进行分组。
  9. 如权利要求8所述的方法，其特征在于，所述波束分组信息具体包括下列信息中的一个或者多个：所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
  10. 如权利要求7-9任一权项所述的方法，其特征在于，在所述基站将所述N个下行发送波束的波束分组信息发送给终端之后，所述方法还包括：
    所述基站接收由所述终端发送的所述T个下行发送波束的相关信息。
  11. 如权利要求7所述的方法，其特征在于，所述T个下行发送波束分别属于不同的分组。
  12. 如权利要求7所述的方法，其特征在于，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中任意两个下行发送波束所对应的下行接收波束不同。
  13. 如权利要求7所述的方法，其特征在于，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中属于同一个分组的两个下行发送波束所对应的下行接收波束不同。
  14. 如权利要求10所述的方法，其特征在于，在所述接收由所述终端发送的所述T个下行发送波束的相关信息之后，所述方法还包括：
    所述基站从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号同时通过所述至少两个下行发送波束发送给所述终端；或
    所述基站从所述T个下行发送波束中选择至少两个下行发送波束，并将多个下行信号分别通过所述至少两个下行发送波束同时发送给所述终端；或
    所述基站从所述T个下行发送波束中选择第一下行发送波束，并将下行信号通过所述第一下行发送波束发送给所述终端，其中，所述终端接收由所述第一下行发送波束发送的训练信号的信号质量为所述T个下行发送波束发送的训练信号中信号质量最好；或
    所述基站从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号映射到不同时频资源上的多个子信号分别通过所述至少两个下行发送波束发送给所述终端。
  15. 一种终端，其特征在于，包括：
    第一接收模块，用于接收由基站的N个下行发送波束发送的训练信号及由所述基站发送的所述N个下行发送波束的波束分组信息，N为大于零的整数；
    第一确定模块，用于基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，T为小于N的正整数。
  16. 如权利要求15所述的终端，其特征在于，所述波束分组信息包括下列信息中的一种或者多种：
    所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
  17. 如权利要求15所述的终端，其特征在于，所述第一确定模块用于：
    根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束。
  18. 如权利要求15所述的终端，其特征在于，所述第一确定模块用于：
    根据所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束；
    相应的，在所述终端根据所述波束分组信息，从所述N个下行发送波束中确定出分别属于不同分组的T个下行发送波束的同时，所述第一确定模块还用于：
    确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行接收波束中任意两个下行接收波束不同。
  19. 如权利要求15所述的终端，其特征在于，在所述从所述N个下行发送波束中确定出T个下行发送波束的同时，所述第一确定模块还用于：
    确定与所述T个下行发送波束对应的T个下行接收波束，且所述T个下行发送波束中属于同一分组的下行发送波束对应的下行接收波束不同。
  20. 如权利要求15-19任一权项所述的终端，其特征在于，在所述终端基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束之后，所 述终端还包括：
    第一发送模块，用于将所述T个下行发送波束的相关信息发送给所述基站，以使所述基站基于所述T个下行发送波束确定向所述终端发送下行信号的下行发送波束。
  21. 一种基站，其特征在于，包括：
    第二分组模块，用于对用于发送训练信号的N个下行发送波束进行分组，N为大于零的整数；
    第二发送模块，用于将所述N个下行发送波束的波束分组信息发送给终端，以使所述终端根据所述波束分组信息从所述N个下行发送波束中确定出T个下行发送波束，T为小于或等于N的正整数。
  22. 如权利要求21所述的基站，其特征在于，所述第二分组模块用于：
    所述基站根据波束的空间相关性，对所述N个下行发送波束进行分组；或
    所述基站根据波束的空间指向性，对所述N个下行发送波束进行分组。
  23. 如权利要求22所述的基站，其特征在于，所述波束分组信息具体包括下列信息中的一个或者多个：所述N个下行发送波束的分组组数、每个分组中下行发送波束的数量、每个分组中每个下行发送波束的波束标识信息及与所述每个下行发送波束对应的训练信号的信号标识信息。
  24. 如权利要求21-23任一权项所述的基站，其特征在于，在所述基站将所述N个下行发送波束的波束分组信息发送给终端之后，所述基站还包括：
    第二接收模块，用于接收由所述终端发送的所述T个下行发送波束的相关信息。
  25. 如权利要求21所述的基站，其特征在于，所述T个下行发送波束分别属于不同的分组。
  26. 如权利要求21所述的基站，其特征在于，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中任意两个下行发送波束所对应的下行接收波束不同。
  27. 如权利要求21所述的基站，其特征在于，所述T个下行发送波束分别属于不同的分组，并且所述T个下行发送波束中属于同一个分组的两个下行发送波束所对应的下行接收波束不同。
  28. 如权利要求24所述的基站，其特征在于，在所述接收由所述终端发送的所述T个下行发送波束的相关信息之后，所述基站还包括：
    第二选择模块，用于从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号同时通过所述至少两个下行发送波束发送给所述终端；或
    从所述T个下行发送波束中选择至少两个下行发送波束，并将多个下行信号分别通过 所述至少两个下行发送波束同时发送给所述终端；或
    从所述T个下行发送波束中选择第一下行发送波束，并将下行信号通过所述第一下行发送波束发送给所述终端，其中，所述终端接收由所述第一下行发送波束发送的训练信号的信号质量为所述T个下行发送波束发送的训练信号中信号质量最好；或
    从所述T个下行发送波束中选择至少两个下行发送波束，并将下行信号映射到不同时频资源上的多个子信号分别通过所述至少两个下行发送波束发送给所述终端。
  29. 一种终端，其特征在于，该终端包括处理器、存储器和收发机，其中，收发机在处理器的控制下接收和发送数据，存储器中保存有预设的程序，处理器读取存储器中的程序，按照该程序执行以下过程：
    通过收发机接收由基站的N个下行发送波束发送的训练信号及由所述基站发送的所述N个下行发送波束的波束分组信息，N为大于零的整数；
    基于所述训练信号及所述波束分组信息，从所述N个下行发送波束中确定出T个下行发送波束，T为小于N的正整数。
  30. 一种基站，其特征在于，包括：处理器、存储器和收发机，其中，收发机在处理器的控制下接收和发送数据，存储器中保存有预设的程序，处理器读取存储器中的程序，按照该程序执行以下过程：
    对用于发送训练信号的N个下行发送波束进行分组，N为大于零的整数；
    指示收发机将所述N个下行发送波束的波束分组信息发送给终端，以使所述终端根据所述波束分组信息从所述N个下行发送波束中确定出T个下行发送波束，T为小于或等于N的正整数。
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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111682889A (zh) * 2019-03-11 2020-09-18 华为技术有限公司 多波束追踪方法和装置
CN112448744B (zh) * 2019-08-30 2022-09-09 成都华为技术有限公司 一种信号测量方法及装置
EP4087345B1 (en) 2020-02-19 2026-04-08 Huawei Technologies Co., Ltd. Beam pair training method and communication apparatus
CN113630169B (zh) * 2020-05-09 2023-10-10 广州海格通信集团股份有限公司 定向波束对准系统、方法、通信设备和存储介质

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8571127B2 (en) * 2010-03-11 2013-10-29 Nec Laboratories America, Inc. MIMO transmission with rank adaptation for multi-gigabit 60 GHz wireless
CN105210306A (zh) * 2013-05-10 2015-12-30 三星电子株式会社 无线通信系统中用于选择发送和接收波束的设备和方法
CN105308880A (zh) * 2014-05-23 2016-02-03 联发科技股份有限公司 高效波束训练方法以及相关通信装置和网络控制装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011150549A1 (en) * 2010-06-01 2011-12-08 Nokia Corporation Apparatus and method for selection of beam groups and subset of beams in communication system
KR101922597B1 (ko) * 2011-12-27 2019-02-21 삼성전자주식회사 Ｆｄｄ 모드로 동작하는 거대 ｍｉｍｏ 시스템에서 채널상태정보 기준신호를 전송하고 수신하기 위한 송수신 장치 및 방법
KR101881847B1 (ko) * 2012-02-21 2018-08-24 삼성전자주식회사 통신 시스템에서 신호를 송수신하는 방법 및 장치
KR102009743B1 (ko) * 2012-06-29 2019-10-21 삼성전자주식회사 빔포밍 기반 통신 시스템에서 신호를 전송하는 방법 및 장치
CN105027461B (zh) * 2013-03-29 2019-06-28 英特尔Ip公司 用于多用户多输入多输出(mu-mimo)的正交波束成形
US9948375B2 (en) * 2013-08-05 2018-04-17 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving reference signal through beam grouping in wireless communication system
KR102071372B1 (ko) * 2013-09-16 2020-01-30 삼성전자 주식회사 무선 통신 시스템에서 빔 포밍을 고려한 drx 제어 방법 및 장치
CN104660311B (zh) * 2013-11-20 2019-03-12 中兴通讯股份有限公司 一种波束赋形方法、确定初始波束索引集合的方法及装置
CN105721033B (zh) * 2016-02-23 2018-12-28 清华大学 一种多用户毫米波通信系统的波束赋形方法及系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8571127B2 (en) * 2010-03-11 2013-10-29 Nec Laboratories America, Inc. MIMO transmission with rank adaptation for multi-gigabit 60 GHz wireless
CN105210306A (zh) * 2013-05-10 2015-12-30 三星电子株式会社 无线通信系统中用于选择发送和接收波束的设备和方法
CN105308880A (zh) * 2014-05-23 2016-02-03 联发科技股份有限公司 高效波束训练方法以及相关通信装置和网络控制装置

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