CN107896123B - Large-scale antenna beam transmission method, base station and terminal - Google Patents

Large-scale antenna beam transmission method, base station and terminal Download PDF

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Publication number
CN107896123B
CN107896123B CN201610875801.1A CN201610875801A CN107896123B CN 107896123 B CN107896123 B CN 107896123B CN 201610875801 A CN201610875801 A CN 201610875801A CN 107896123 B CN107896123 B CN 107896123B
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terminal
csi
signal
base station
downlink
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CN107896123A (en
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高秋彬
陈润华
拉盖施
李传军
李辉
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Priority to CN201610875801.1A priority Critical patent/CN107896123B/en
Priority to PCT/CN2017/087809 priority patent/WO2018059005A1/en
Priority to TW106124473A priority patent/TWI757313B/en
Publication of CN107896123A publication Critical patent/CN107896123A/en
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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
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618—Space-time coding
    • H04L1/0675—Space-time coding characterised by the signaling
    • H04L1/0693—Partial feedback, e.g. partial channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

The invention relates to the technical field of wireless communication, in particular to a large-scale antenna beam transmission method, a base station and a terminal, which are used for improving the transmission efficiency and enhancing the reliability in the large-scale antenna beam transmission and comprise the following steps: the base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at the terminal from a plurality of downlink transmission beams; the base station determines a first beam forming mode corresponding to a data channel between the base station and the terminal, the first beam forming mode is carried in a control signal and is sent to the terminal through the control channel, the terminal receives a signal sent by the base station according to the first beam forming mode, the first beam forming mode is to carry out beam forming on the signal of the data channel through a main downlink sending beam and/or at least one auxiliary downlink beam, and therefore when the base station sends the signal to the terminal, the beam forming mode can be flexibly selected to carry out beam forming on the signal, the data transmission efficiency is improved, and the reliability of data transmission is enhanced.

Description

Large-scale antenna beam transmission method, base station and terminal
Technical Field
The invention relates to the technical field of wireless communication, in particular to a large-scale antenna beam transmission method, a base station and a terminal.
Background
In order to further improve MIMO (Multiple-Input Multiple-Output) technology, a large-scale antenna technology is introduced into a mobile communication system. For a base station, a fully digital large-scale antenna may have up to 128/256/512 antenna elements and up to 128/256/512 transceiver elements, one connected to each antenna element. By transmitting pilot signals of up to 128/256/512 antenna ports, the terminal is caused to measure and feed back channel state information. For terminals, antenna arrays of up to 32/64 antenna elements may also be configured. And a huge beam forming gain is obtained by beam forming at two sides of the base station and the terminal so as to make up for signal attenuation caused by path loss. Especially in high frequency band communication, such as 30GHz frequency point, the path loss makes the coverage of wireless signals extremely limited. By the large-scale antenna technology, the coverage range of wireless signals can be expanded to a practical range.
In the prior art, when large-scale antenna beam transmission is performed, a beam forming corresponding relationship between a base station and a terminal is generally determined through a training process, which roughly comprises the following steps:
1) and the base station sends a downlink beam training signal. The base station has a plurality of candidate downlink transmission beams, each candidate downlink transmission beam corresponds to a group of beam forming weights, and the base station can transmit a beam training signal for each candidate downlink transmission beam, namely the beam training signal of each candidate downlink transmission beam is formed by the beam forming weight corresponding to the beam and then transmitted.
2) And the terminal receives a downlink beam training signal sent by the base station and selects a recommended downlink sending beam through the measurement of the beam training signal. For example, the terminal may select the candidate downlink transmission beam with the strongest training signal received power as the recommended beam.
3) And aiming at each recommended downlink transmission beam, the terminal determines a corresponding downlink receiving beam.
4) And the terminal reports the recommended relevant information of the downlink transmission beam to the base station. The related information includes an identifier of the recommended downlink transmission beam (for example, a number of the downlink transmission beam), strength information of the downlink transmission beam training signal received by the terminal (for example, a received signal power level), and the like.
5) And the base station determines the selected downlink transmission beam according to the relevant information of the downlink transmission beam reported by the terminal.
Through the above process, one or more corresponding downlink transmission beams can be determined for one terminal, and the downlink receiving beam at the terminal side can be determined, and in the data transmission process, the base station selects one downlink beam from the determined downlink transmission beams to transmit signals to the terminal, and the selected downlink beam cannot be changed after being determined.
The problems with the above process are: after determining a plurality of downlink transmission beams corresponding to the terminal, when the base station transmits data to the terminal each time, only one downlink transmission beam can be selected from the plurality of downlink transmission beams for signal transmission, and the selected downlink transmission beam cannot be changed, which may cause a serious performance bottleneck when a large number of signals need to be transmitted, and the reliability is not very high.
In summary, the large-scale antenna beam transmission method in the prior art has the technical problems of low reliability and low transmission efficiency.
Disclosure of Invention
The invention provides a large-scale antenna beam transmission method, a base station and a terminal, which are used for improving the transmission efficiency and enhancing the reliability in large-scale antenna beam transmission.
In a first aspect, an embodiment of the present invention provides a large-scale antenna beam transmission method, including:
the base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at the terminal from a plurality of downlink transmission beams;
the base station sends the configuration information of the main downlink transmission beam and the configuration information of the at least one auxiliary downlink transmission beam to the terminal;
the base station determines a first beam forming mode corresponding to a signal of a data channel between the base station and the terminal, wherein the first beam forming mode is to carry out beam forming on the signal of the data channel through the main downlink sending beam and/or the at least one auxiliary downlink beam;
and the base station carries the indication information of the first beam forming mode in a control signal and sends the indication information to the terminal through a control channel, so that the terminal receives a signal sent by the base station to the data channel according to the first beam forming mode.
Optionally, the determining, by the base station, a primary downlink transmission beam and at least one secondary downlink transmission beam for the terminal from a plurality of downlink transmission beams includes:
the base station sends training signals to the terminal according to the downlink sending beams, so that the terminal determines the signal intensity information of the downlink sending beams and sends the information to the base station;
the base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at the terminal from the plurality of downlink transmission beams according to the received signal intensity information of the plurality of downlink transmission beams; or
The base station receives recommended downlink transmission beam information reported by the terminal, and determines a main downlink transmission beam and at least one auxiliary downlink transmission beam for the terminal based on the recommended downlink transmission beam information; or
The base station determines signal intensity information of a plurality of uplink receiving beams according to the received data signals and/or control signals of the terminal;
the base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at the terminal according to the determined signal intensity information of the plurality of uplink receiving beams; or
The base station selects at least one downlink transmission beam from the plurality of downlink transmission beams as a downlink channel state information reference signal (CSI-RS) transmission beam, and transmits a CSI-RS signal to the terminal by using the downlink CSI-RS transmission beam;
and the base station receives the channel state information which is sent by the terminal and determined aiming at the CSI-RS signal, and determines a main downlink sending beam and at least one auxiliary downlink sending beam aiming at the terminal according to the channel state information.
Optionally, the receiving, by the base station, channel state information determined for the CSI-RS signal and sent by the terminal, and determining a primary downlink transmission beam and at least one auxiliary downlink transmission beam for the terminal according to the channel state information includes:
the base station receives channel state information which is sent by the terminal and determined aiming at each CSI-RS signal, according to the channel state information, the downlink CSI-RS sending wave beam corresponding to the CSI-RS signal with the best channel quality in the channel state information is used as the main downlink wave beam, and one or more downlink CSI-RS sending wave beams except the downlink CSI-RS sending wave beam corresponding to the CSI-RS signal with the best channel quality in the channel state information are used as the at least one auxiliary downlink wave beam.
Optionally, the carrying, by the base station, the first beamforming manner in a control signal, and sending, after beamforming the control signal in the second beamforming manner, the control signal to the terminal through the control channel includes:
the base station configures N control resource subsets for the terminal, wherein one control resource subset comprises a plurality of resource units used for control channel transmission, and one control resource subset is associated with one downlink transmission beam;
the base station sends the configuration information of the N control resource subsets to the terminal so that the terminal monitors the N control resource subsets;
the base station carries the indication information of the first beamforming mode in the control signal, and sends the indication information to the terminal through one or more control resource subsets in the N control resource subsets, so that the terminal obtains the first beamforming mode in the control signal when monitoring that an effective control channel exists in the N control resource subsets, wherein the effective control channel refers to the fact that the control signal of the control channel is sent to the terminal or to a terminal group where the terminal is located.
Optionally, the carrying, by the base station, the indication information of the first beamforming method in a control signal, and before sending the indication information to the terminal through a control channel, further includes:
the base station determines a second beam forming mode corresponding to a control signal of a control channel between the base station and the terminal, wherein the second beam forming mode is to carry out beam forming on the control signal of the control channel through the main downlink transmission beam and/or the at least one auxiliary downlink beam;
the base station carries the indication information of the first beamforming mode in a control signal, and sends the indication information to the terminal through a control channel, including:
and the base station carries the indication information of the first beam forming mode in a control signal, and after the second beam forming mode carries out beam forming on the control signal, the control signal is sent to the terminal through the control channel.
Optionally, the base station updates the first beamforming mode according to the channel state information corresponding to the primary downlink transmission beam and the channel state information corresponding to the at least one auxiliary downlink transmission beam, which are fed back by the terminal; or
And when the base station continuously receives the hybrid automatic repeat request HARQ non-response NACK feedback sent by the terminal or cannot receive the feedback of the terminal, updating the first beam forming mode according to the main downlink sending beam and the at least one auxiliary downlink sending beam.
Optionally, the CSI-RS signal configuration information sent by the base station to the terminal includes configuration information of a CSI-RS signal downlink transmission beam, where the CSI-RS signal downlink transmission beam is one of the main downlink transmission beam and the at least one auxiliary downlink transmission beam;
the base station transmits the CSI-RS signals by using the CSI-RS signal downlink transmission wave beam;
and the base station receives channel state information obtained by the terminal based on the measurement of the CSI-RS signal.
Optionally, the base station sends CSI process configuration information to the terminal, where the CSI process configuration information includes association indication information of one or more CSI-RS signals;
and the base station receives channel state information obtained by the terminal through measurement according to one or more CSI-RS signals related to the CSI process in the terminal.
Optionally, the first beamforming manner includes some or all of the following:
the method comprises the steps of carrying out beam forming on signals of a data channel through a main downlink transmission beam, carrying out beam forming on the signals of the data channel through an auxiliary downlink transmission beam, carrying out space division multiplexing beam forming on the signals of the data channel through the main downlink transmission beam and the auxiliary downlink beam, and carrying out diversity beam forming on the signals of the data channel through the main downlink transmission beam and the auxiliary downlink beam.
Optionally, the second beamforming manner includes some or all of the following:
the method comprises the steps of carrying out beam forming on a control signal of a control channel through a main downlink transmission beam, carrying out beam forming on the control signal of the control channel through an auxiliary downlink transmission beam, and carrying out diversity beam forming on the control signal of the control channel through the main downlink transmission beam and the auxiliary downlink beam.
In a second aspect, an embodiment of the present invention provides a large-scale antenna beam transmission method, including:
a terminal receives configuration information of a main downlink transmission beam and configuration information of at least one auxiliary downlink transmission beam transmitted by a base station, and determines the main downlink transmission beam and the at least one auxiliary downlink transmission beam;
the terminal receives a control signal sent by the base station, wherein the control signal comprises a first beam forming mode corresponding to a signal of a data channel between the base station and the terminal, and the first beam forming mode is to perform beam forming on the signal of the data channel through the main downlink sending beam and/or the at least one auxiliary downlink beam;
and the terminal receives the signal of the data channel sent by the base station according to the first beamforming mode.
Optionally, the receiving, by the terminal, a control signal sent by the base station includes:
the terminal receives the control signal which is sent by the base station through the control channel between the base station and the terminal and is shaped by the beam in a second beam forming mode, wherein the second beam forming mode is to shape the control signal of the control channel by the main downlink sending beam and/or the at least one auxiliary downlink beam.
Optionally, the terminal receives CSI-RS signal configuration information sent by the base station, where the CSI-RS signal configuration information includes configuration information of a CSI-RS signal downlink transmission beam, and the CSI-RS signal downlink transmission beam is one of the main downlink transmission beam and the at least one auxiliary downlink transmission beam;
the terminal determines a CSI-RS downlink receiving wave beam corresponding to the CSI-RS signal downlink transmitting wave beam and receives the CSI-RS signal transmitted by the base station according to the CSI-RS downlink receiving wave beam;
and the terminal obtains a channel estimation value according to the received CSI-RS signal, and sends the channel state information to the base station after obtaining the channel state information according to the channel estimation value.
Optionally, the method further comprises:
the terminal receives CSI process configuration information sent by the base station, wherein the CSI process configuration information comprises association indication information of one or more CSI-RS signals;
the terminal determines one or more CSI-RS signals associated with each process according to the association indication information;
the terminal obtains a channel estimation value according to the received CSI-RS signal, obtains channel state information according to the channel estimation value and then sends the channel state information to the base station, and the method comprises the following steps:
the terminal obtains channel estimation values of one or more CSI-RS signals associated with each process according to the received CSI-RS signals;
and the terminal determines channel state information according to the channel estimation value of one or more CSI-RS signals associated with each process and feeds the channel state information back to the base station.
Optionally, the determining, by the terminal, channel state information according to the channel estimation value of one or more CSI-RS signals associated with each process and feeding back the channel state information to the base station includes:
the terminal respectively determines channel state information corresponding to each CSI-RS signal according to the channel estimation value of each CSI-RS signal associated with each process, and feeds back the channel state information corresponding to each CSI-RS signal to the base station; or
The terminal determines comprehensive channel state information according to the channel estimation value of the CSI-RS signal associated with each CSI-RS process, and the comprehensive channel state information is fed back to the base station; or
The terminal selects one or more CSI-RS signals according to the channel estimation value of each CSI-RS signal associated with each process, respectively determines and feeds back channel state information corresponding to each selected CSI-RS signal, and feeds back identification information of each selected CSI-RS signal to the base station.
Optionally, the receiving, by the terminal, the signal sent by the base station through the data channel according to the first beamforming method includes:
the first beam forming mode is that a data channel adopts main downlink transmission beams for transmission, and the terminal receives the data channel by using downlink receiving beams corresponding to the main downlink transmission beams; or
The first beam forming mode is that a data channel adopts auxiliary downlink transmission beams for transmission, and the terminal receives downlink receiving beams corresponding to the auxiliary downlink transmission beams; or
The first beam forming mode is that a data channel adopts a main downlink transmission beam and an auxiliary downlink beam for space division multiplexing transmission, and the terminal receives by using downlink receiving beams corresponding to the main downlink transmission beam and the auxiliary downlink transmission beam respectively;
the first beam forming mode is that a data channel adopts a main downlink transmission beam and an auxiliary downlink beam for diversity transmission, and the terminal receives by using downlink receiving beams corresponding to the main downlink transmission beam and the auxiliary downlink transmission beam respectively.
In a third aspect, an embodiment of the present invention provides a large-scale antenna beam transmission method, including:
a base station configures N control resource subsets for a terminal, wherein one control resource subset comprises a plurality of resource units for control channel transmission;
the base station sends configuration information of the N control resource subsets to the terminal, wherein the configuration information comprises indication information of downlink sending beams corresponding to each control resource subset;
and the base station sends a control signal to the terminal in at least one control resource subset of the N control resource subsets.
Optionally, the sending, by the base station, a control signal to the terminal in one or more of the N control resource subsets includes:
and the base station sends the control signal to the terminal in a downlink sending beam corresponding to at least one control resource subset in the N control resource subsets.
In a fourth aspect, an embodiment of the present invention provides a large-scale antenna beam transmission method, including:
a terminal receives configuration information of N control resource subsets sent by a base station, wherein one control resource subset comprises a plurality of resource units used for control channel transmission, and the configuration information comprises indication information of downlink sending beams corresponding to each control resource subset;
and the terminal receives a control signal sent by the base station through at least one control resource subset in the N control resource subsets.
Optionally, the receiving, by the terminal, a control signal sent by the base station through at least one of the N control resource subsets includes:
the terminal determines to receive the downlink receiving wave beam of the control resource subset according to the indication information of the downlink sending wave beam corresponding to the at least one control resource subset;
and the terminal receives a control signal in the control resource subset by using the downlink receiving beam.
In a fifth aspect, an embodiment of the present invention provides a base station, including:
a processing unit configured to determine a primary downlink transmission beam and at least one secondary downlink transmission beam for a terminal from a plurality of downlink transmission beams; determining a first beamforming mode corresponding to a signal of a data channel between terminals, wherein the first beamforming mode is to perform beamforming on the signal of the data channel through the main downlink transmission beam and/or the at least one auxiliary downlink beam;
a transceiver unit, configured to send configuration information of the primary downlink transmission beam and configuration information of the at least one secondary downlink transmission beam to the terminal; and carrying the indication information of the first beamforming mode in a control signal, and sending the indication information to the terminal through a control channel, so that the terminal receives a signal sent by a base station through the data channel according to the first beamforming mode in the control signal.
Optionally, the transceiver unit is specifically configured to: transmitting training signals to the terminal according to the downlink transmission beams so that the terminal determines the signal intensity information of the downlink transmission beams and transmits the signal intensity information to the base station;
the processing unit is specifically configured to: determining a primary downlink transmission beam and at least one auxiliary downlink transmission beam for the terminal from the plurality of downlink transmission beams according to the signal strength information of the plurality of downlink transmission beams received by the transceiver unit; or
The processing unit is specifically configured to: receiving, by the transceiver unit, recommended downlink transmission beam information reported by the terminal; determining a primary downlink transmission beam and at least one auxiliary downlink transmission beam for the terminal based on the recommended downlink transmission beam information; or
The processing unit is specifically configured to: determining signal intensity information of a plurality of uplink receiving beams according to the data signals and/or the control signals of the terminal received by the transceiver unit; determining a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at the terminal according to the determined signal intensity information of the plurality of uplink receiving beams; or
The processing unit is specifically configured to: selecting at least one downlink transmission beam from the plurality of downlink transmission beams as a downlink channel state information reference signal (CSI-RS) transmission beam, and transmitting a CSI-RS signal to the terminal by using the downlink CSI-RS transmission beam; and determining a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at the terminal according to the channel state information received by the transceiver unit and sent by the terminal.
Optionally, the processing unit is specifically configured to:
and receiving, by the transceiver unit, channel state information determined for each CSI-RS signal sent by the terminal, and according to the channel state information, taking a downlink CSI-RS transmission beam corresponding to a CSI-RS signal with the best channel quality in the channel state information as the primary downlink beam, and taking one or more downlink CSI-RS transmission beams other than the downlink CSI-RS transmission beam corresponding to the CSI-RS signal with the best channel quality in the channel state information as the at least one secondary downlink beam.
Optionally, the processing unit is specifically configured to:
configuring N control resource subsets for the terminal, wherein one control resource subset comprises a plurality of resource units used for control channel transmission, and one control resource subset is associated with one downlink transmission beam;
sending the configuration information of the N control resource subsets to the terminal through the transceiver unit so that the terminal monitors the N control resource subsets;
and carrying the indication information of the first beamforming mode in the control signal, and sending the indication information to the terminal through one or more control resource subsets of the N control resource subsets, so that the terminal obtains the first beamforming mode in the control signal when monitoring that an effective control channel exists in the N control resource subsets, wherein the effective control channel refers to that the control signal of the control channel is sent to the terminal or to a terminal group where the terminal is located.
Optionally, the processing unit is further configured to:
carrying the indication information of the first beamforming mode in a control signal, and before sending the indication information to the terminal through a control channel, determining a second beamforming mode corresponding to the control signal of the control channel between the terminals, wherein the second beamforming mode is to perform beamforming on the control signal of the control channel through the main downlink sending beam and/or the at least one auxiliary downlink beam;
and carrying the indication information of the first beam forming mode in a control signal, and sending the control signal to the terminal through the control channel after the control signal is subjected to beam forming in the second beam forming mode.
Optionally, the processing unit is further configured to:
updating the first beam forming mode according to the channel state information corresponding to the main downlink transmission beam and the channel state information corresponding to the at least one auxiliary downlink transmission beam which are fed back by the terminal; or
And updating the first beam forming mode according to the main downlink transmission beam and the at least one auxiliary downlink transmission beam when the hybrid automatic repeat request (HARQ) non-response NACK feedback sent by the terminal is continuously received or the feedback of the terminal cannot be received.
Optionally, the transceiver unit is further configured to: the CSI-RS signal configuration information is sent to the terminal and comprises configuration information of a CSI-RS signal downlink sending beam, and the CSI-RS signal downlink sending beam is one of the main downlink sending beam and the at least one auxiliary downlink sending beam; transmitting the CSI-RS signal by using the CSI-RS signal downlink transmission wave beam; and receiving channel state information obtained by the terminal based on the measurement of the CSI-RS signal.
Optionally, the transceiver unit is further configured to: sending CSI process configuration information to the terminal, wherein the CSI process configuration information comprises association indication information of one or more CSI-RS signals; and receiving channel state information obtained by the terminal through measurement according to one or more CSI-RS signals related to the CSI process in the terminal.
Optionally, the first beamforming manner includes some or all of the following:
the method comprises the steps of carrying out beam forming on signals of a data channel through a main downlink transmission beam, carrying out beam forming on the signals of the data channel through an auxiliary downlink transmission beam, carrying out space division multiplexing beam forming on the signals of the data channel through the main downlink transmission beam and the auxiliary downlink beam, and carrying out diversity beam forming on the signals of the data channel through the main downlink transmission beam and the auxiliary downlink beam.
Optionally, the second beamforming manner includes some or all of the following:
the method comprises the steps of carrying out beam forming on a control signal of a control channel through a main downlink transmission beam, carrying out beam forming on the control signal of the control channel through an auxiliary downlink transmission beam, and carrying out diversity beam forming on the control signal of the control channel through the main downlink transmission beam and the auxiliary downlink beam.
In a sixth aspect, an embodiment of the present invention provides a terminal, including:
a transceiver unit, configured to receive configuration information of a main downlink transmission beam and configuration information of at least one auxiliary downlink transmission beam sent by a base station, and determine the main downlink transmission beam and the at least one auxiliary downlink transmission beam; receiving a control signal sent by the base station, wherein the control signal comprises a first beamforming mode corresponding to a signal of a data channel between the base station and a terminal, and the first beamforming mode is to perform beamforming on the signal of the data channel through the main downlink transmission beam and/or the at least one auxiliary downlink beam;
and the processing unit is used for receiving the signal of the data channel sent by the base station according to the first beamforming mode.
Optionally, the transceiver unit is specifically configured to:
and receiving the control signal which is sent by the base station through the control channel between the base station and the terminal and is shaped by a second beam forming mode, wherein the second beam forming mode is to shape the control signal of the control channel by the main downlink sending beam and/or the at least one auxiliary downlink beam.
Optionally, the transceiver unit is further configured to: receiving CSI-RS signal configuration information sent by the base station, wherein the CSI-RS signal configuration information comprises configuration information of a CSI-RS signal downlink sending beam, and the CSI-RS signal downlink sending beam is one of the main downlink sending beam and the at least one auxiliary downlink sending beam;
the processing unit is further configured to: determining a CSI-RS downlink receiving wave beam corresponding to the CSI-RS signal downlink transmitting wave beam, and receiving a CSI-RS signal transmitted by the base station according to the CSI-RS downlink receiving wave beam; and obtaining a channel estimation value according to the received CSI-RS signal, and sending the channel state information to the base station through the transceiving unit after obtaining the channel state information according to the channel estimation value.
Optionally, the transceiver unit is further configured to: receiving CSI process configuration information sent by the base station, wherein the CSI process configuration information comprises association indication information of one or more CSI-RS signals;
determining one or more CSI-RS signals associated with each process according to the association indication information;
the processing unit is specifically configured to: obtaining channel estimation values of one or more CSI-RS signals associated with each process according to the received CSI-RS signals; and determining channel state information according to the channel estimation values of one or more CSI-RS signals associated with each process and feeding back the channel state information to the base station.
Optionally, the processing unit is specifically configured to:
respectively determining channel state information corresponding to each CSI-RS signal according to the channel estimation value of each CSI-RS signal associated with each process, and feeding back the channel state information corresponding to each CSI-RS signal to the base station; or
Determining comprehensive channel state information according to the channel estimation value of the CSI-RS signal associated with each CSI-RS process, and feeding the comprehensive channel state information back to the base station; or
And selecting one or more CSI-RS signals according to the channel estimation value of each CSI-RS signal associated with each process, respectively determining and feeding back channel state information corresponding to each selected CSI-RS signal, and feeding back the identification information of each selected CSI-RS signal to the base station.
In a seventh aspect, an embodiment of the present invention provides a base station, including:
a processing unit, configured to configure N control resource subsets for a terminal, where one control resource subset includes a plurality of resource units for control channel transmission;
a transceiver unit, configured to send configuration information of the N control resource subsets to the terminal, where the configuration information includes indication information of a downlink transmission beam corresponding to each control resource subset; and sending a control signal to the terminal in at least one control resource subset of the N control resource subsets.
Optionally, the transceiver unit is specifically configured to: and sending the control signal to the terminal by a downlink sending beam corresponding to at least one control resource subset in the N control resource subsets.
In an eighth aspect, an embodiment of the present invention provides a terminal, including:
a transceiver unit, configured to receive configuration information of N control resource subsets sent by a base station, where one control resource subset includes multiple resource units used for control channel transmission, and the configuration information includes indication information of a downlink transmission beam corresponding to each control resource subset; and receiving a control signal sent by the base station through at least one control resource subset in the N control resource subsets.
Optionally, the terminal further includes a processing unit, configured to: determining to receive the downlink receiving beam of the control resource subset according to the indication information of the downlink transmitting beam corresponding to the at least one control resource subset;
the transceiver unit is specifically configured to: receiving control signals within the subset of control resources with the downlink receive beam.
In the embodiment of the invention, a base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at a terminal from a plurality of downlink transmission beams; the method comprises the steps that a base station determines a first beam forming mode corresponding to a signal of a data channel between the base station and a terminal, the first beam forming mode is carried in a control signal and is sent to the terminal through the control channel, so that the terminal receives the signal sent by the base station through the data channel according to the first beam forming mode in the control signal, wherein the first beam forming mode is to carry out beam forming on the signal of the data channel through a main downlink sending beam and/or at least one auxiliary downlink beam, and therefore, when the base station sends the control signal and the data signal to the terminal, the beam forming mode can be flexibly selected to carry out beam forming on the signal, the data transmission efficiency is improved, and the reliability of data transmission is enhanced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a diagram of a system architecture suitable for use with an embodiment of the present invention;
fig. 2 is a flowchart of a large-scale antenna beam transmission method according to an embodiment of the present invention;
fig. 3 is a flowchart of a large-scale antenna beam transmission method according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating control resource subsets according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a base station according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a terminal according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a base station according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) System, a Long Term Evolution (Long Term Evolution) System, a LTE Frequency Division Duplex (FDD) System, a LTE Time Division Duplex (TDD) System, a Universal Mobile Telecommunications System (UMTS) System, a Worldwide Interoperability for Microwave Access (WiMAX) Communication System, and a future 5G Communication System.
Fig. 1 is a schematic diagram illustrating a system architecture to which an embodiment of the present invention is applicable, and as shown in fig. 1, the system architecture to which an embodiment of the present invention is applicable includes a base station 101, and a terminal 102, a terminal 103, and a terminal 104, which are connected wirelessly.
Any of terminals 102, 103, and 104 may communicate with one or more core networks via a Radio Access Network (RAN), and a terminal may refer to a User Equipment (UE), an Access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network, and the like.
The Base Station 101 may be a device for communicating with a terminal, and for example, may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or the like.
The beam forming is a signal preprocessing technology based on an antenna array, and generates a directional beam by adjusting the weighting coefficient of each array element in the antenna array, so that obvious array gain can be obtained. Therefore, the beamforming technology has great advantages in the aspects of coverage extension, edge throughput improvement, interference suppression and the like.
The embodiments of the present invention will be described in further detail with reference to the drawings attached hereto.
As shown in fig. 2, a large-scale antenna beam transmission method provided in an embodiment of the present invention includes:
step 201, the base station determines a primary downlink transmission beam and at least one secondary downlink transmission beam for the terminal from a plurality of downlink transmission beams.
Step 202, the base station sends the configuration information of the main downlink transmission beam and the configuration information of at least one auxiliary downlink transmission beam to the terminal.
Step 203, the terminal receives configuration information of a main downlink transmission beam and configuration information of at least one auxiliary downlink transmission beam sent by the base station, and determines the main downlink transmission beam and the at least one auxiliary downlink transmission beam.
Step 204, the base station determines a first beam forming mode corresponding to a signal of a data channel between terminals, wherein the first beam forming mode is to perform beam forming on the signal of the data channel through the main downlink transmission beam and/or the at least one auxiliary downlink beam.
Step 205, the base station carries the indication information of the first beamforming mode in the control signal and sends the indication information to the terminal through the control channel.
And step 206, the terminal receives the control signal sent by the base station, and determines the signal receiving mode to be the signal receiving mode in the first beam forming mode according to the first beam forming mode in the control signal.
And step 207, the base station sends the signal to the terminal through a data channel in a first beam forming mode.
And step 208, the terminal receives the signal through a first beam forming mode.
In step 201, the base station determines a primary downlink transmission beam and at least one auxiliary downlink transmission beam for a terminal, where the specific modes include at least the following:
first, a base station determines a primary downlink transmission beam and at least one auxiliary downlink transmission beam for a terminal by transmitting a training signal to the terminal
Training process:
1) and the base station sends a downlink beam training signal to the terminal. Base station sharing
Figure BDA0001125494840000177
A plurality of candidate downlink transmission beams, each downlink beam corresponds to a group of beam forming weight values, the transmission beam forming weight value of the nth beam is
Figure BDA0001125494840000171
Where K is the number of antenna elements for beam forming, which may be less than the number of antenna elements for the base station. The base station may transmit a downlink beam training signal for each candidate downlink transmit beam. For example, to
Figure BDA0001125494840000172
A downlink transmission beam, which can be transmitted by the base station
Figure BDA0001125494840000173
A downlink beam training signal. This is achieved by
Figure BDA0001125494840000174
The downlink beam training signals may be TDM (Time Division Multiplexing), FDM (Frequency Division Multiplexing), CDM (Code Division Multiplexing), orA combination of various multiplexing schemes. For example, in OFDM (Orthogonal Frequency Division Multiplexing) based systems,
Figure BDA0001125494840000175
a training signal can occupy
Figure BDA0001125494840000176
One OFDM symbol, with each training signal occupying 1 OFDM symbol.
The training signal of each downlink transmission beam is sent out after being shaped by the beam shaping weight corresponding to the beam. In the following description, "transmit with one beam", "transmit on one beam", "transmit with one beam", "transmit through one beamforming", and the like, refer to that signals are transmitted from a physical antenna after being shaped with beamforming weights corresponding to the beams. Assuming that a signal to be transmitted on one resource unit is s, a signal after being shaped by an nth beam is:
y＝[y1 y2…yK]T＝Wns，
wherein y iskWill be mapped to antenna element k for transmission.
The beam training signal is transmitted periodically, or aperiodically.
2) And the terminal receives the downlink beam training signals sent by the base station, and obtains the signal intensity information of each downlink beam training signal through the measurement of the downlink beam training signals.
The terminal reports the information related to the downlink transmission beam to the base station. The related information includes an identification of the downlink transmission beam, for example, a number of the downlink transmission beam. According to different multiplexing modes of the downlink beam/beam training signal, information of the downlink transmission beam fed back by the terminal can be different. For example, the downlink beam training signals are time division multiplexed on different OFDM symbols or subframes, and the terminal measures and feeds back downlink time information. For another example, the downlink beamforming training signal is multiplexed in different frequency resources, and the terminal measures and feeds back downlink frequency information. The information related to the downlink transmission beam may further include strength information of a downlink transmission beam training signal received by the terminal, such as a received signal power level.
3) And the base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at the terminal from the plurality of downlink transmission beams according to the received signal intensity information of the plurality of downlink transmission beams.
For example, the base station uses one downlink transmission beam with the strongest corresponding signal strength as a primary downlink transmission beam, and selects M downlink transmission beams other than the primary downlink transmission beam as secondary downlink transmission beams, where M is greater than or equal to 1.
Through the steps, the determination of one main downlink transmission beam and at least one auxiliary downlink transmission beam can be realized.
And secondly, the base station receives the recommended downlink transmission beam information reported by the terminal, and determines a main downlink transmission beam and at least one auxiliary downlink transmission beam for the terminal based on the recommended downlink transmission beam information
In step 2) of the mode one training process, the terminal may further select a recommended downlink transmission beam according to the signal strength information of each obtained downlink beam training signal. For example, the terminal may select the downlink transmission beam with the strongest training signal received power as the recommended downlink transmission beam.
And then the terminal sends the recommended downlink transmission beams to the base station, sends the signal intensity information corresponding to the recommended downlink transmission beams to the base station, and the base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam from the recommended downlink transmission beams.
After that, the terminal identifies a corresponding downlink reception beam for each recommended downlink transmission beam (of course, the terminal may be configured to identify one corresponding downlink reception beam for each of all downlink transmission beams, and is not limited to the recommended downlink transmission beam).
In addition, for one downlink beam training signal, the terminal may attempt to receive each downlink reception beam separately, and select the downlink reception beam with the strongest reception signal power as the downlink reception beam corresponding to the downlink transmission beam.
And thirdly, the base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at the terminal based on reciprocity of the uplink and downlink signals
And the base station determines the signal intensity information of a plurality of uplink receiving beams according to the received data signals and/or control signals of the terminal, and determines a main downlink transmitting beam and at least one auxiliary downlink transmitting beam aiming at the terminal according to the determined signal intensity information of the plurality of uplink receiving beams.
In a system in which reciprocity between uplink and downlink channels is established, a base station has a correspondence relationship between an uplink reception beam and a downlink transmission beam (specifically, between a weight of the uplink reception beam and a weight of the downlink transmission beam) for the same terminal, and the correspondence relationship is known by the base station. The base station receives a data signal and/or a control signal sent by the terminal, determines an uplink receiving beam, and then determines a corresponding downlink sending beam (determines a weight of the downlink sending beam) based on the channel reciprocity and the corresponding relation of the uplink beam and the downlink beam.
Specifically, the base station may select a downlink transmission beam corresponding to an uplink reception beam with the highest received uplink signal strength as a primary downlink transmission beam, and select one or more downlink transmission beams corresponding to uplink reception beams with the highest received uplink signal strength from the remaining uplink reception beams as secondary downlink transmission beams.
And fourthly, the base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam for the terminal based on the channel state information fed back by the terminal in the CSI-RS signal feedback process
The following CSI-RS (Channel state information references signals) feedback process provided in the embodiment of the present invention is as follows:
1. CSI-RS signal transmission process
1) And the base station determines at least 2 downlink CSI-RS sending beams. The determination method can be as follows:
a) and the base station selects based on the downlink transmission beam related information according to the downlink transmission beam related information reported by the terminal and received in the training process. For example, if the strength information of the transmission beam is included in the information on the downlink transmission beam, the base station may select several beams with the highest strength as the downlink CSI-RS transmission beams.
b) And the base station selects a downlink CSI-RS (channel state information-reference signal) sending beam based on the reciprocity of the uplink channel and the downlink channel. In a system in which reciprocity of uplink and downlink channels is established, a base station has a correspondence relationship between an uplink reception beam and a downlink transmission beam (between a weight of the uplink reception beam and a weight of the downlink transmission beam) for the same terminal, and the correspondence relationship is known by the base station. The base station receives a data signal and/or a control signal sent by the terminal, determines an uplink receiving beam, and then determines a corresponding downlink sending beam (determines a weight of the downlink sending beam) based on the channel reciprocity and the corresponding relation of the uplink beam and the downlink beam. The base station may select a downlink transmission beam corresponding to a plurality of uplink reception beams with the highest received uplink signal strength as a downlink CSI-RS transmission beam.
2) And the base station transmits the CSI-RS signal. The base station transmits one CSI-RS signal on each downlink CSI-RS transmission beam. Each CSI-RS signal comprises at least one antenna port. Sending CSI-RS on a downlink beam means that the signal of each antenna port of the CSI-RS signal is sent from the antenna after the downlink beam forming.
3) And the base station informs the terminal of the downlink transmission beam related information corresponding to each CSI-RS signal. The downlink transmission beam related information may be an identification of a downlink transmission beam of the CSI-RS signal, such as a number of the downlink transmission beam. The notification method comprises the following steps:
a) and the base station includes the relevant information of the downlink transmission beam in the configuration information of each CSI-RS, for example, the identification of the downlink transmission beam. The configuration information of the CSI-RS may be transmitted through a higher layer signaling, or may be transmitted through a physical layer signaling, such as DCI (downlink control information).
b) And the base station informs the terminal of the relevant information of the downlink CSI-RS sending wave beam through an independent signaling process (which means that the configuration process of the CSI-RS is independent). The base station further comprises indication information in the configuration information of each CSI-RS, and the indication information indicates which downlink CSI-RS transmission beam is adopted by each CSI-RS for transmission. For example, the downlink CSI-RS transmission beam includes 2 beams, and the configuration information of the CSI-RS may include 1 bit indicating that the beam is downlink CSI-RS transmission beam 0 or downlink CSI-RS transmission beam 1 for transmission.
4) And the terminal receives the configuration information of each CSI-RS, receives the related information of the downlink transmission beam of each CSI-RS signal and determines the downlink reception beam of each CSI-RS.
The terminal has determined the downlink receive beam corresponding to each downlink transmit beam in the training process. And the terminal acquires the downlink transmission beam of each CSI-RS from the received information, and then determines the downlink receiving beam of each CSI-RS according to the corresponding relation between the downlink transmission beam and the downlink receiving beam.
5) And the terminal receives the CSI-RS signals by applying the downlink receiving wave beam of each CSI-RS, performs channel estimation and calculates channel state information based on the channel estimation value. The Channel state information may include CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), RI (rank indication), and other parameters.
The channel state information is calculated in the following possible modes:
a) and each CSI-RS is independently calculated, and the terminal independently calculates the channel state information according to the channel value estimated by each CSI-RS.
b) And integrating the channel estimation values of the multiple CSI-RSs for calculation. For example, assuming that data transmission from the base station to the terminal is multi-stream space division multiplexing, each data stream is transmitted from one downlink CSI-RS transmission beam, and since interference exists among multiple data streams, the terminal needs to calculate interference generated by other data streams when calculating information such as CQI, PMI, RI, and the like of each data stream, and therefore, it needs to calculate by integrating channel estimation results of multiple CSI-RSs.
For another example, assuming that data transmission from the base station to the terminal is multi-stream diversity transmission, one data stream is transmitted from multiple downlink CSI-RS transmission beams, and the terminal needs to calculate a synthesis result transmitted by the multiple CSI-RS transmission beams when calculating information such as CQI, PMI, RI, and the like of the data stream, so that calculation needs to be performed by synthesizing channel estimation results of multiple CSI-RSs.
2. CSI-RS feedback procedure
In the first mode, the CSI feedback process may be performed in a multi-CSI process mode (each downlink CSI-RS sends a CSI process).
1) And the base station configures a plurality of CSI processes for the terminal. Each CSI process is associated with one CSI-RS (one of a plurality of CSI-RSs in a CSI-RS transmission process). The association method may include an identifier of one CSI-RS in the configuration message of the CSI process, where the identifier points to one CSI-RS described in the CSI-RS transmission process.
2) And the terminal receives the CSI process configuration information and feeds back the CSI process configuration information according to the CSI process configuration.
The method comprises the steps that the terminal determines a CSI-RS signal related to the terminal according to configuration information of each CSI process, then determines a downlink receiving wave beam of the CSI-RS according to a mode described by a CSI-RS sending process, receives the CSI-RS signal and calculates channel state information.
3) And the terminal feeds back channel state information to the base station according to the CSI process configuration information. The feedback is in the form of:
a) and the terminal respectively determines the channel state information corresponding to each CSI-RS signal according to the channel estimation value of the CSI-RS signal associated with each process, and feeds back the channel state information corresponding to each CSI-RS signal to the base station.
b) And the terminal selects one or more CSI-RS signals according to a certain criterion according to the channel estimation value of each CSI-RS signal associated with each process, respectively determines and feeds back the channel state information corresponding to each selected CSI-RS signal, and feeds back the identification information of each selected CSI-RS signal to the base station. The selection criteria may be the strongest received signal, or the strongest transmission capability, or the largest channel capacity, or the best channel quality, etc.
c) And the terminal determines comprehensive channel state information according to the channel estimation value of the CSI-RS signal associated with each CSI-RS process, and feeds the comprehensive channel state information back to the base station.
In the second mode, the feedback process of the CSI can also be carried out in a single CSI process mode
1) And the base station configures 1 CSI process for the terminal. The CSI process is associated with a plurality of CSI-RSs (CSI-RSs in a CSI-RS transmission process). The association method may include, in a configuration message of the CSI process, identifiers of the multiple CSI-RSs, where the identifiers point to one or more CSI-RSs described in the CSI-RS transmission process.
2) And the terminal receives the configuration information of the CSI process and feeds back the configuration information according to the configuration of the CSI process.
The method comprises the steps that the terminal determines the associated CSI-RS according to the configuration of each CSI process, then determines the downlink receiving wave beam of the CSI-RS according to the mode described by the CSI-RS sending process, receives the CSI-RS and calculates the channel state information.
3) And the terminal feeds back channel state information to the base station according to the configuration of the CSI process. The feedback is in the form of:
a) and the terminal respectively determines the channel state information corresponding to each CSI-RS signal according to the channel estimation value of the CSI-RS signal associated with the CSI process, and feeds back the channel state information corresponding to each CSI-RS signal to the base station.
b) And the terminal selects one or more CSI-RS signals according to a certain criterion according to the channel estimation values of all the CSI-RS signals associated with the CSI process, respectively determines and feeds back the channel state information corresponding to each selected CSI-RS signal, and feeds back the identification information of each selected CSI-RS signal to the base station. The selection criteria may be the strongest received signal, or the strongest transmission capability, or the largest channel capacity, or the best channel quality, etc.
c) And the terminal determines comprehensive channel state information according to the channel estimation value of the CSI-RS signal associated with the CSI process, and feeds the comprehensive channel state information back to the base station.
The base station receives channel state information which is sent by the terminal and determined aiming at each CSI-RS signal, according to the channel state information, the downlink CSI-RS sending beam corresponding to the CSI-RS signal with the best channel quality in the channel state information is used as a main downlink beam, and one or more downlink CSI-RS sending beams except the downlink CSI-RS sending beam corresponding to the CSI-RS signal with the best channel quality in the channel state information are used as auxiliary downlink beams.
In step 202, the base station sends the configuration information of the primary downlink transmission beam and the configuration information of the at least one secondary downlink transmission beam to the terminal.
In step 203, the terminal receives configuration information of a primary downlink transmission beam and configuration information of at least one auxiliary downlink transmission beam transmitted by the base station, and determines the primary downlink transmission beam and the at least one auxiliary downlink transmission beam.
In the step 204, the base station determines a first beamforming manner corresponding to a signal of a data channel between terminals, where the first beamforming manner is to perform beamforming on the signal of the data channel through the primary downlink transmission beam and/or the at least one auxiliary downlink beam.
The signal of the data channel may be a data signal, a CSI-RS signal, another signal, or the like.
Specifically, the first beamforming manner includes some or all of the following:
1) carrying out beam forming on signals of a data channel through a main downlink transmission beam;
2) carrying out beam forming on signals of the data channel through the auxiliary downlink transmission beam;
3) carrying out space division multiplexing beam forming on signals of the data channel through the main downlink transmitting beam and the auxiliary downlink beam;
space division multiplexing refers to beamforming transmission of multiple data on different downlink transmission beams.
4) And performing diversity beamforming on signals of the data channel through the main downlink transmitting beam and the auxiliary downlink beam.
Diversity refers to beamforming transmission of one data stream over multiple downlink transmission beams.
The first beamforming method may specify, in an initial state, for example, to perform beamforming on a signal of a data channel through a main downlink transmission beam, or to perform beamforming on a signal of a data channel through one or more auxiliary downlink transmission beams, or to perform spatial multiplexing beamforming on a signal of a data channel through a main downlink transmission beam and an auxiliary downlink beam, or to perform diversity beamforming on a signal of a data channel through a main downlink transmission beam and an auxiliary downlink beam, or the like.
In the process of sending the subsequent signal, the first beamforming method may be updated, specifically: the base station updates the first beam forming mode according to the channel state information corresponding to the main downlink transmission beam and the channel state information corresponding to at least one auxiliary downlink transmission beam fed back by the terminal; or when the base station continuously receives HARQ (Hybrid Automatic Repeat reQuest) NACK (non-acknowledgement) feedback sent by the terminal or cannot receive the feedback of the terminal, updating the first beamforming mode according to the main downlink transmission beam and the at least one auxiliary downlink transmission beam.
Alternatively, the first beamforming method may be updated using the following method:
a terminal receives CSI-RS signal configuration information sent by a base station, wherein the CSI-RS signal configuration information comprises configuration information of a CSI-RS signal downlink sending wave beam, and the CSI-RS signal downlink sending wave beam is one of the main downlink sending wave beam and the at least one auxiliary downlink sending wave beam;
the terminal determines a CSI-RS downlink receiving wave beam corresponding to the CSI-RS signal downlink transmitting wave beam, and receives the CSI-RS signal transmitted by the base station according to the CSI-RS downlink receiving wave beam;
the terminal obtains a channel estimation value according to the received CSI-RS signal, and sends the channel state information to the base station after obtaining the channel state information according to the channel estimation value;
and the base station updates the first beamforming mode according to the obtained channel estimation value.
Alternatively, the selection may be performed based on channel state information fed back by the terminal. For example, the base station receives Channel Quality Information (CQI) of a CSI process (or CSI-RS) of a primary downlink transmission beam and a CSI process (CSI-RS) of a secondary downlink transmission beam reported by the terminal, and selects a beam with higher CQI for data transmission.
Or, the base station selects a beam corresponding to the CSI process (or CSI-RS) recommended by the terminal for data transmission.
In some cases, in order to improve reliability of data transmission, the primary downlink transmission beam and the secondary downlink transmission beam may be selected for transmit diversity transmission, that is, the same data stream is transmitted from the primary downlink transmission beam and the secondary downlink transmission beam at the same time.
In step 205, the base station carries the indication information of the first beamforming method in the control signal and sends the indication information to the terminal through the control channel.
Specifically, at least the following two ways can be implemented to send the first beamforming way to the terminal:
in a first mode
Step A, a base station configures N control resource subsets for a terminal, wherein one control resource subset comprises a plurality of resource units used for control channel transmission, and one control resource subset is associated with one downlink transmission beam;
b, the base station sends the configuration information of the N control resource subsets to the terminal;
step C, the terminal monitors the N control resource subsets;
step D, the base station carries the indication information of the first beam forming mode in a control signal and sends the indication information to the terminal through one or more control resource subsets in the N control resource subsets;
and step E, when monitoring that the effective control channels exist in the N control resource subsets, the terminal acquires the first beam forming mode in the control signals, wherein the effective control channels refer to the control signals of the control channels which are sent to the terminal or sent to the terminal group where the terminal is located.
Mode two
Step A, a base station determines a second beam forming mode corresponding to a control signal of a control channel between terminals, wherein the second beam forming mode is to carry out beam forming on the control signal of the control channel through a main downlink transmission beam and/or at least one auxiliary downlink beam;
specifically, the second beamforming manner includes some or all of the following:
1) carrying out beam forming on signals of a data channel through a main downlink transmission beam;
2) carrying out beam forming on signals of the data channel through the auxiliary downlink transmission beam;
3) and performing diversity beamforming on signals of the data channel through the main downlink transmitting beam and the auxiliary downlink beam.
And step B, the base station carries the indication information of the first beam forming mode in a control signal, and the control signal is sent to a terminal through a control channel after being subjected to beam forming by the second beam forming mode.
The base station performs beamforming on a control signal through a second beamforming method and then transmits the control signal to the terminal through a control channel, wherein the control signal includes a beamforming method in which the terminal receives data transmitted by the base station through a data channel, and specifically, the control signal includes a first beamforming method.
And the base station sends a control signal containing the indication information of the beam forming mode transmitted by the data channel to the terminal through the control channel. For example, the indication information about the beamforming method for data channel transmission contained in the control channel is represented by using 2 bits, and can be represented according to the method described in table 1.
TABLE 1
Figure BDA0001125494840000261
In step 206, the terminal receives the control signal sent by the base station, and determines, according to the first beamforming manner in the control signal, that the manner of receiving the signal is to receive the signal through the first beamforming manner.
In step 207, the base station transmits the signal to the terminal through the data channel by using the first beamforming method.
In step 208, the terminal receives the signal through the first beamforming method.
The terminal receives a signal transmitted by the base station. And receiving by adopting a first beam forming mode.
Possible ways include:
a) if the base station carries out beam forming on the signals of the data channel through the main downlink transmitting beam, the terminal receives the signals through a downlink receiving beam corresponding to the main downlink transmitting beam;
b) if the base station carries out beam forming on the signals of the data channel through the auxiliary downlink sending beam, the terminal receives the signals through the downlink receiving beam corresponding to the auxiliary downlink sending beam;
c) if the base station carries out space division multiplexing beam forming on the signals of the data channel through the main downlink transmitting beam and the auxiliary downlink beam, the terminal receives the signals through downlink receiving beams corresponding to the main downlink transmitting beam and the auxiliary downlink transmitting beam;
d) and if the base station carries out diversity beam forming on the signals of the data channel through the main downlink transmitting beam and the auxiliary downlink beam, the terminal receives the signals through downlink receiving beams corresponding to the main downlink transmitting beam and the auxiliary downlink transmitting beam.
And the terminal receives the signal by using the determined downlink receiving wave beam and demodulates the data.
In the embodiment of the present invention, through the above steps 201 to 208, the control signal and the data signal are transmitted by using the main downlink transmission beam and/or the auxiliary downlink transmission beam, so that the stability of information transmission is improved, and the efficiency of data transmission is improved.
In the embodiment of the invention, a base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at a terminal from a plurality of downlink transmission beams; the method comprises the steps that a base station determines a first beam forming mode corresponding to a signal of a data channel between the base station and a terminal, the first beam forming mode is carried in a control signal and is sent to the terminal through the control channel, so that the terminal receives the signal sent by the base station through the data channel according to the first beam forming mode in the control signal, wherein the first beam forming mode is to carry out beam forming on the signal of the data channel through a main downlink sending beam and/or at least one auxiliary downlink beam, and therefore, when the base station sends the control signal and the data signal to the terminal, the beam forming mode can be flexibly selected to carry out beam forming on the signal, the data transmission efficiency is improved, and the reliability of data transmission is enhanced.
Based on the same inventive concept, an embodiment of the present invention provides a large-scale antenna beam transmission method, as shown in fig. 3, including:
step 301, a base station configures N control resource subsets for a terminal, wherein one control resource subset includes a plurality of resource units for control channel transmission;
step 302, the base station sends configuration information of the N control resource subsets to the terminal, where the configuration information includes indication information of downlink transmission beams corresponding to each control resource subset;
step 303, the terminal receives configuration information of the N control resource subsets sent by the base station;
step 304, the base station sends a control signal to the terminal in at least one control resource subset of the N control resource subsets;
step 305, the terminal receives the control signal sent by the base station through at least one of the N control resource subsets.
In the step 305, the following steps may be specifically implemented:
the terminal determines to receive the downlink receiving wave beam of the control resource subset according to the downlink sending wave beam indication information of the at least one control resource subset; and the terminal receives the control signals of the control resource subset by using the downlink receiving beam.
The base station configures N control resource subsets for the terminal, wherein one control resource subset comprises a plurality of resource units used for control channel transmission, and one control resource subset is associated with one downlink transmission beam.
The control resource subsets may be CDM, TDM, or FDM multiplexed. Preferably, TDM multiplexing is used between the control resource subsets.
An example of a control resource subset configuration is shown in fig. 4. Fig. 4 includes 2 control resource subsets, which are respectively configured on different OFDM symbols.
In the embodiment of the invention, the base station can send the control signal to the terminal through the control resource subsets, and the control signal can be sent on one control resource subset or a plurality of control resource subsets during sending, thereby realizing flexible sending of the control signal and improving the transmission efficiency and stability.
Based on the same inventive concept, an embodiment of the present invention further provides a base station, as shown in fig. 5, including:
a processing unit 501, configured to determine a primary downlink transmission beam and at least one secondary downlink transmission beam for a terminal from a plurality of downlink transmission beams; determining a first beamforming mode corresponding to a signal of a data channel between terminals, wherein the first beamforming mode is to perform beamforming on the signal of the data channel through the main downlink transmission beam and/or the at least one auxiliary downlink beam;
a transceiver unit 502, configured to send configuration information of the primary downlink transmission beam and configuration information of the at least one secondary downlink transmission beam to the terminal; and carrying the indication information of the first beamforming mode in a control signal, and sending the indication information to the terminal through a control channel, so that the terminal receives a signal sent by a base station through the data channel according to the first beamforming mode in the control signal.
Optionally, the transceiver unit 502 is specifically configured to: transmitting training signals to the terminal according to the downlink transmission beams so that the terminal determines the signal intensity information of the downlink transmission beams and transmits the signal intensity information to the base station;
the processing unit 501 is specifically configured to: determining a primary downlink transmission beam and at least one auxiliary downlink transmission beam for the terminal from the plurality of downlink transmission beams according to the signal strength information of the plurality of downlink transmission beams received by the transceiver unit 502; or
The processing unit 501 is specifically configured to: receiving, by the transceiver unit 502, recommended downlink transmission beam information reported by the terminal; determining a primary downlink transmission beam and at least one auxiliary downlink transmission beam for the terminal based on the recommended downlink transmission beam information; or
The processing unit 501 is specifically configured to: determining signal strength information of a plurality of uplink receiving beams according to the data signal and/or the control signal of the terminal received by the transceiver unit 502; determining a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at the terminal according to the determined signal intensity information of the plurality of uplink receiving beams; or
The processing unit 501 is specifically configured to: selecting at least one downlink transmission beam from the plurality of downlink transmission beams as a downlink channel state information reference signal (CSI-RS) transmission beam, and transmitting a CSI-RS signal to the terminal by using the downlink CSI-RS transmission beam; according to the channel state information received by the transceiver unit 502 and sent by the terminal, a primary downlink transmission beam and at least one secondary downlink transmission beam for the terminal are determined.
Optionally, the processing unit 501 is specifically configured to:
the transceiver unit 502 receives channel state information determined for each CSI-RS signal sent by the terminal, and according to the channel state information, uses a downlink CSI-RS transmission beam corresponding to a CSI-RS signal with the best channel quality in the channel state information as the primary downlink beam, and uses one or more downlink CSI-RS transmission beams except the downlink CSI-RS transmission beam corresponding to the CSI-RS signal with the best channel quality in the channel state information as the at least one secondary downlink beam.
Optionally, the processing unit 501 is specifically configured to:
configuring N control resource subsets for the terminal, wherein one control resource subset comprises a plurality of resource units used for control channel transmission, and one control resource subset is associated with one downlink transmission beam;
sending configuration information of the N control resource subsets to the terminal through the transceiver unit 502, so that the terminal monitors the N control resource subsets;
and carrying the indication information of the first beamforming mode in the control signal, and sending the indication information to the terminal through one or more control resource subsets of the N control resource subsets, so that the terminal obtains the first beamforming mode in the control signal when monitoring that an effective control channel exists in the N control resource subsets, wherein the effective control channel refers to that the control signal of the control channel is sent to the terminal or to a terminal group where the terminal is located.
Optionally, the processing unit 501 is further configured to:
carrying the indication information of the first beamforming mode in a control signal, and before sending the indication information to the terminal through a control channel, determining a second beamforming mode corresponding to the control signal of the control channel between the terminals, wherein the second beamforming mode is to perform beamforming on the control signal of the control channel through the main downlink sending beam and/or the at least one auxiliary downlink beam;
and carrying the indication information of the first beam forming mode in a control signal, and sending the control signal to the terminal through the control channel after the control signal is subjected to beam forming in the second beam forming mode.
Optionally, the processing unit 501 is further configured to:
updating the first beam forming mode according to the channel state information corresponding to the main downlink transmission beam and the channel state information corresponding to the at least one auxiliary downlink transmission beam which are fed back by the terminal; or
And updating the first beam forming mode according to the main downlink transmission beam and the at least one auxiliary downlink transmission beam when the hybrid automatic repeat request (HARQ) non-response NACK feedback sent by the terminal is continuously received or the feedback of the terminal cannot be received.
Optionally, the transceiver 502 is further configured to: the CSI-RS signal configuration information is sent to the terminal and comprises configuration information of a CSI-RS signal downlink sending beam, and the CSI-RS signal downlink sending beam is one of the main downlink sending beam and the at least one auxiliary downlink sending beam; transmitting the CSI-RS signal by using the CSI-RS signal downlink transmission wave beam; and receiving channel state information obtained by the terminal based on the measurement of the CSI-RS signal.
Optionally, the transceiver 502 is further configured to: sending CSI process configuration information to the terminal, wherein the CSI process configuration information comprises association indication information of one or more CSI-RS signals; and receiving channel state information obtained by the terminal through measurement according to one or more CSI-RS signals related to the CSI process in the terminal.
Optionally, the first beamforming manner includes some or all of the following:
the method comprises the steps of carrying out beam forming on signals of a data channel through a main downlink transmission beam, carrying out beam forming on the signals of the data channel through an auxiliary downlink transmission beam, carrying out space division multiplexing beam forming on the signals of the data channel through the main downlink transmission beam and the auxiliary downlink beam, and carrying out diversity beam forming on the signals of the data channel through the main downlink transmission beam and the auxiliary downlink beam.
Optionally, the second beamforming manner includes some or all of the following:
the method comprises the steps of carrying out beam forming on a control signal of a control channel through a main downlink transmission beam, carrying out beam forming on the control signal of the control channel through an auxiliary downlink transmission beam, and carrying out diversity beam forming on the control signal of the control channel through the main downlink transmission beam and the auxiliary downlink beam.
In the embodiment of the invention, a base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at a terminal from a plurality of downlink transmission beams; the method comprises the steps that a base station determines a first beam forming mode corresponding to a signal of a data channel between the base station and a terminal, the first beam forming mode is carried in a control signal and is sent to the terminal through the control channel, so that the terminal receives the signal sent by the base station through the data channel according to the first beam forming mode in the control signal, wherein the first beam forming mode is to carry out beam forming on the signal of the data channel through a main downlink sending beam and/or at least one auxiliary downlink beam, and therefore, when the base station sends the control signal and the data signal to the terminal, the beam forming mode can be flexibly selected to carry out beam forming on the signal, the data transmission efficiency is improved, and the reliability of data transmission is enhanced.
Based on the same inventive concept, an embodiment of the present invention further provides a terminal, as shown in fig. 6, including:
a transceiver unit 602, configured to receive configuration information of a main downlink transmission beam and configuration information of at least one auxiliary downlink transmission beam sent by a base station, and determine the main downlink transmission beam and the at least one auxiliary downlink transmission beam; receiving a control signal sent by the base station, wherein the control signal comprises a first beamforming mode corresponding to a signal of a data channel between the base station and a terminal, and the first beamforming mode is to perform beamforming on the signal of the data channel through the main downlink transmission beam and/or the at least one auxiliary downlink beam;
a processing unit 601, configured to receive, according to the first beamforming manner, a signal sent by the base station to the data channel.
Optionally, the transceiver 602 is specifically configured to:
and receiving the control signal which is sent by the base station through the control channel between the base station and the terminal and is shaped by a second beam forming mode, wherein the second beam forming mode is to shape the control signal of the control channel by the main downlink sending beam and/or the at least one auxiliary downlink beam.
Optionally, the transceiver 602 is further configured to: receiving CSI-RS signal configuration information sent by the base station, wherein the CSI-RS signal configuration information comprises configuration information of a CSI-RS signal downlink sending beam, and the CSI-RS signal downlink sending beam is one of the main downlink sending beam and the at least one auxiliary downlink sending beam;
the processing unit 601 is further configured to: determining a CSI-RS downlink receiving wave beam corresponding to the CSI-RS signal downlink transmitting wave beam, and receiving a CSI-RS signal transmitted by the base station according to the CSI-RS downlink receiving wave beam; and obtaining a channel estimation value according to the received CSI-RS signal, and sending the channel state information obtained according to the channel estimation value to the base station through the transceiver unit 602.
Optionally, the transceiver 602 is further configured to: receiving CSI process configuration information sent by the base station, wherein the CSI process configuration information comprises association indication information of one or more CSI-RS signals;
determining one or more CSI-RS signals associated with each process according to the association indication information;
the processing unit 601 is specifically configured to: obtaining channel estimation values of one or more CSI-RS signals associated with each process according to the received CSI-RS signals; and determining channel state information according to the channel estimation values of one or more CSI-RS signals associated with each process and feeding back the channel state information to the base station.
Optionally, the processing unit 601 is specifically configured to:
respectively determining channel state information corresponding to each CSI-RS signal according to the channel estimation value of each CSI-RS signal associated with each process, and feeding back the channel state information corresponding to each CSI-RS signal to the base station; or
Determining comprehensive channel state information according to the channel estimation value of the CSI-RS signal associated with each CSI-RS process, and feeding the comprehensive channel state information back to the base station; or
And selecting one or more CSI-RS signals according to the channel estimation value of each CSI-RS signal associated with each process, respectively determining and feeding back channel state information corresponding to each selected CSI-RS signal, and feeding back the identification information of each selected CSI-RS signal to the base station.
In the embodiment of the invention, a base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at a terminal from a plurality of downlink transmission beams; the method comprises the steps that a base station determines a first beam forming mode corresponding to a signal of a data channel between the base station and a terminal, the first beam forming mode is carried in a control signal and is sent to the terminal through the control channel, so that the terminal receives the signal sent by the base station through the data channel according to the first beam forming mode in the control signal, wherein the first beam forming mode is to carry out beam forming on the signal of the data channel through a main downlink sending beam and/or at least one auxiliary downlink beam, and therefore, when the base station sends the control signal and the data signal to the terminal, the beam forming mode can be flexibly selected to carry out beam forming on the signal, the data transmission efficiency is improved, and the reliability of data transmission is enhanced.
Based on the same inventive concept, an embodiment of the present invention further provides a base station, as shown in fig. 7, including:
a processing unit 701, configured to configure N control resource subsets for a terminal, where one control resource subset includes a plurality of resource units for control channel transmission;
a transceiver unit 702, configured to send configuration information of the N control resource subsets to the terminal, where the configuration information includes indication information of downlink transmission beams corresponding to each control resource subset; and sending a control signal to the terminal in at least one control resource subset of the N control resource subsets.
Optionally, the transceiver 702 is specifically configured to: and sending the control signal to the terminal by a downlink sending beam corresponding to at least one control resource subset in the N control resource subsets.
In the embodiment of the invention, the base station can send the control signal to the terminal through the control resource subsets, and the control signal can be sent on one control resource subset or a plurality of control resource subsets during sending, thereby realizing flexible sending of the control signal and improving the transmission efficiency and stability.
Based on the same inventive concept, an embodiment of the present invention further provides a terminal, as shown in fig. 8, including:
a transceiver unit 802, configured to receive configuration information of N control resource subsets sent by a base station, where a control resource subset includes multiple resource units used for control channel transmission, and the configuration information includes indication information of a downlink transmission beam corresponding to each control resource subset; and receiving a control signal sent by the base station through at least one control resource subset in the N control resource subsets.
Optionally, the terminal further includes a processing unit 801 configured to: determining to receive the downlink receiving beam of the control resource subset according to the indication information of the downlink transmitting beam corresponding to the at least one control resource subset;
the transceiver unit 802 is specifically configured to: receiving control signals within the subset of control resources with the downlink receive beam.
In the embodiment of the invention, the base station can send the control signal to the terminal through the control resource subsets, and the control signal can be sent on one control resource subset or a plurality of control resource subsets during sending, thereby realizing flexible sending of the control signal and improving the transmission efficiency and stability.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (40)

1. A method for massive antenna beam transmission, comprising:
the base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at the terminal from a plurality of downlink transmission beams;
the base station sends the configuration information of the main downlink transmission beam and the configuration information of the at least one auxiliary downlink transmission beam to the terminal;
the base station determines a first beam forming mode corresponding to a signal of a data channel between the base station and the terminal, wherein the first beam forming mode is to carry out beam forming on the signal of the data channel through the main downlink sending beam and/or the at least one auxiliary downlink beam;
and the base station carries the indication information of the first beam forming mode in a control signal and sends the indication information to the terminal through a control channel, so that the terminal receives a signal sent by the base station to the data channel according to the first beam forming mode.
2. The method of claim 1, wherein the base station determining a primary downlink transmission beam and at least one secondary downlink transmission beam for the terminal from among a plurality of downlink transmission beams comprises:
the base station sends training signals to the terminal according to the downlink sending beams, so that the terminal determines the signal intensity information of the downlink sending beams and sends the information to the base station;
the base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at the terminal from the plurality of downlink transmission beams according to the received signal intensity information of the plurality of downlink transmission beams; or
The base station receives recommended downlink transmission beam information reported by the terminal, and determines a main downlink transmission beam and at least one auxiliary downlink transmission beam for the terminal based on the recommended downlink transmission beam information; or
The base station determines signal intensity information of a plurality of uplink receiving beams according to the received data signals and/or control signals of the terminal;
the base station determines a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at the terminal according to the determined signal intensity information of the plurality of uplink receiving beams; or
The base station selects at least one downlink transmission beam from the plurality of downlink transmission beams as a downlink channel state information reference signal (CSI-RS) transmission beam, and transmits a CSI-RS signal to the terminal by using the downlink CSI-RS transmission beam;
and the base station receives the channel state information which is sent by the terminal and determined aiming at the CSI-RS signal, and determines a main downlink sending beam and at least one auxiliary downlink sending beam aiming at the terminal according to the channel state information.
3. The method of claim 2, wherein the base station receives channel state information determined for the CSI-RS signal and transmitted by the terminal, and determines a primary downlink transmission beam and at least one secondary downlink transmission beam for the terminal according to the channel state information, comprising:
the base station receives channel state information which is sent by the terminal and determined aiming at each CSI-RS signal, according to the channel state information, the downlink CSI-RS sending wave beam corresponding to the CSI-RS signal with the best channel quality in the channel state information is used as the main downlink wave beam, and one or more downlink CSI-RS sending wave beams except the downlink CSI-RS sending wave beam corresponding to the CSI-RS signal with the best channel quality in the channel state information are used as the at least one auxiliary downlink wave beam.
4. The method of claim 1, wherein the base station carries indication information of the first beamforming method in a control signal, and sends the indication information to the terminal through the control channel, and the method comprises:
the base station configures N control resource subsets for the terminal, wherein one control resource subset comprises a plurality of resource units used for control channel transmission, and one control resource subset is associated with one downlink transmission beam;
the base station sends the configuration information of the N control resource subsets to the terminal so that the terminal monitors the N control resource subsets;
the base station carries the indication information of the first beamforming mode in the control signal, and sends the indication information of the first beamforming mode to the terminal through one or more control resource subsets in the N control resource subsets, so that the terminal obtains the indication information of the first beamforming mode in the control signal when monitoring that an effective control channel exists in the N control resource subsets, wherein the effective control channel refers to the fact that the control signal of the control channel is sent to the terminal or to a terminal group where the terminal is located.
5. The method of claim 1, wherein the base station carries indication information of the first beamforming method in a control signal, and before sending the indication information to the terminal through a control channel, the method further comprises:
the base station determines a second beam forming mode corresponding to a control signal of a control channel between the base station and the terminal, wherein the second beam forming mode is to carry out beam forming on the control signal of the control channel through the main downlink transmission beam and/or the at least one auxiliary downlink beam;
the base station carries the indication information of the first beamforming mode in a control signal, and sends the indication information to the terminal through a control channel, including:
and the base station carries the indication information of the first beam forming mode in a control signal, and after the second beam forming mode carries out beam forming on the control signal, the control signal is sent to the terminal through the control channel.
6. The method of claim 1, wherein the method further comprises:
the base station updates the first beam forming mode according to the channel state information corresponding to the main downlink transmission beam and the channel state information corresponding to the at least one auxiliary downlink transmission beam which are fed back by the terminal; or
And when the base station continuously receives the hybrid automatic repeat request HARQ non-response NACK feedback sent by the terminal or cannot receive the feedback of the terminal, updating the first beam forming mode according to the main downlink sending beam and the at least one auxiliary downlink sending beam.
7. The method of claim 6, wherein the method further comprises:
the base station transmits CSI-RS signal configuration information to the terminal, wherein the CSI-RS signal configuration information comprises configuration information of a CSI-RS signal downlink transmission beam, and the CSI-RS signal downlink transmission beam is one of the main downlink transmission beam and the at least one auxiliary downlink transmission beam;
the base station transmits the CSI-RS signals by using the CSI-RS signal downlink transmission wave beam;
and the base station receives channel state information obtained by the terminal based on the measurement of the CSI-RS signal.
8. The method of claim 7, wherein the method further comprises:
the base station sends CSI process configuration information to the terminal, wherein the CSI process configuration information comprises association indication information of one or more CSI-RS signals;
and the base station receives channel state information obtained by the terminal through measurement according to one or more CSI-RS signals associated with the CSI process.
9. The method of any of claims 1 to 8, wherein the first beamforming manner comprises some or all of:
the method comprises the steps of carrying out beam forming on signals of a data channel through a main downlink transmission beam, carrying out beam forming on the signals of the data channel through an auxiliary downlink transmission beam, carrying out space division multiplexing beam forming on the signals of the data channel through the main downlink transmission beam and the auxiliary downlink beam, and carrying out diversity beam forming on the signals of the data channel through the main downlink transmission beam and the auxiliary downlink beam.
10. The method of claim 5, wherein the second beamforming manner comprises some or all of the following:
the method comprises the steps of carrying out beam forming on a control signal of a control channel through a main downlink transmission beam, carrying out beam forming on the control signal of the control channel through an auxiliary downlink transmission beam, and carrying out diversity beam forming on the control signal of the control channel through the main downlink transmission beam and the auxiliary downlink beam.
11. A method for massive antenna beam transmission, comprising:
a terminal receives configuration information of a main downlink transmission beam and configuration information of at least one auxiliary downlink transmission beam transmitted by a base station, and determines the main downlink transmission beam and the at least one auxiliary downlink transmission beam;
the terminal receives a control signal sent by the base station, wherein the control signal comprises a first beam forming mode corresponding to a signal of a data channel between the base station and the terminal, and the first beam forming mode is to perform beam forming on the signal of the data channel through the main downlink sending beam and/or the at least one auxiliary downlink beam;
and the terminal receives the signal of the data channel sent by the base station according to the first beamforming mode.
12. The method of claim 11, wherein the terminal receives a control signal transmitted by a base station, comprising:
the terminal receives the control signal which is sent by the base station through the control channel between the base station and the terminal and is shaped by the beam in a second beam forming mode, wherein the second beam forming mode is to shape the control signal of the control channel by the main downlink sending beam and/or the at least one auxiliary downlink beam.
13. The method of claim 11, wherein the method further comprises:
the terminal receives CSI-RS signal configuration information sent by the base station, wherein the CSI-RS signal configuration information comprises configuration information of a CSI-RS signal downlink sending wave beam, and the CSI-RS signal downlink sending wave beam is one of the main downlink sending wave beam and the at least one auxiliary downlink sending wave beam;
the terminal determines a CSI-RS signal downlink receiving wave beam corresponding to the CSI-RS signal downlink transmitting wave beam, and receives the CSI-RS signal transmitted by the base station according to the CSI-RS signal downlink receiving wave beam;
and the terminal obtains a channel estimation value according to the received CSI-RS signal, and sends the channel state information to the base station after obtaining the channel state information according to the channel estimation value.
14. The method of claim 13, wherein the method further comprises:
the terminal receives CSI process configuration information sent by the base station, wherein the CSI process configuration information comprises association indication information of one or more CSI-RS signals;
the terminal determines one or more CSI-RS signals associated with each process according to the association indication information;
the terminal obtains a channel estimation value according to the received CSI-RS signal, obtains channel state information according to the channel estimation value and then sends the channel state information to the base station, and the method comprises the following steps:
the terminal obtains channel estimation values of one or more CSI-RS signals associated with each process according to the received CSI-RS signals;
and the terminal determines channel state information according to the channel estimation value of one or more CSI-RS signals associated with each CSI process and feeds the channel state information back to the base station.
15. The method of claim 14, wherein the terminal determines and feeds back channel state information to the base station according to channel estimation values of one or more CSI-RS signals associated with each CSI process, comprising:
the terminal respectively determines channel state information corresponding to each CSI-RS signal according to the channel estimation value of each CSI-RS signal associated with each process, and feeds back the channel state information corresponding to each CSI-RS signal to the base station; or
The terminal determines comprehensive channel state information according to the channel estimation value of the CSI-RS signal associated with each CSI process, and the comprehensive channel state information is fed back to the base station; or
The terminal selects one or more CSI-RS signals according to the channel estimation value of each CSI-RS signal associated with each process, respectively determines and feeds back channel state information corresponding to each selected CSI-RS signal, and feeds back identification information of each selected CSI-RS signal to the base station.
16. The method as claimed in any of claims 11 to 15, wherein the receiving, by the terminal, the signal of the data channel transmitted by the base station according to the first beamforming manner comprises:
the first beam forming mode is that a data channel adopts main downlink transmission beams for transmission, and the terminal receives the data channel by using downlink receiving beams corresponding to the main downlink transmission beams; or
The first beam forming mode is that a data channel adopts auxiliary downlink transmission beams for transmission, and the terminal receives downlink receiving beams corresponding to the auxiliary downlink transmission beams; or
The first beam forming mode is that a data channel adopts a main downlink transmission beam and an auxiliary downlink beam for space division multiplexing transmission, and the terminal receives by using downlink receiving beams corresponding to the main downlink transmission beam and the auxiliary downlink transmission beam respectively;
the first beam forming mode is that a data channel adopts a main downlink transmission beam and an auxiliary downlink beam for diversity transmission, and the terminal receives by using downlink receiving beams corresponding to the main downlink transmission beam and the auxiliary downlink transmission beam respectively.
17. A method for massive antenna beam transmission, comprising:
a base station configures N control resource subsets for a terminal, wherein one control resource subset comprises a plurality of resource units for control channel transmission;
the base station sends configuration information of the N control resource subsets to the terminal, wherein the configuration information comprises indication information of downlink sending beams corresponding to each control resource subset;
and the base station sends a control signal to the terminal in at least one control resource subset of the N control resource subsets.
18. The method of claim 17, wherein the base station transmitting control signals to the terminal within one or more of the N subsets of control resources, comprises:
and the base station sends the control signal to the terminal in a downlink sending beam corresponding to at least one control resource subset in the N control resource subsets.
19. A method for massive antenna beam transmission, comprising:
a terminal receives configuration information of N control resource subsets sent by a base station, wherein one control resource subset comprises a plurality of resource units used for control channel transmission, and the configuration information comprises indication information of downlink sending beams corresponding to each control resource subset;
and the terminal receives a control signal sent by the base station through at least one control resource subset in the N control resource subsets.
20. The method of claim 19, wherein the terminal receiving the control signal transmitted by the base station over at least one of the N subsets of control resources comprises:
the terminal determines to receive the downlink receiving wave beam of the control resource subset according to the indication information of the downlink sending wave beam corresponding to the at least one control resource subset;
and the terminal receives a control signal in the control resource subset by using the downlink receiving beam.
21. A base station, comprising:
a processing unit configured to determine a primary downlink transmission beam and at least one secondary downlink transmission beam for a terminal from a plurality of downlink transmission beams; determining a first beamforming mode corresponding to a signal of a data channel between terminals, wherein the first beamforming mode is to perform beamforming on the signal of the data channel through the main downlink transmission beam and/or the at least one auxiliary downlink beam;
a transceiver unit, configured to send configuration information of the primary downlink transmission beam and configuration information of the at least one secondary downlink transmission beam to the terminal; and carrying the indication information of the first beamforming mode in a control signal, and sending the control signal to the terminal through a control channel, so that the terminal receives a signal sent by the base station through the data channel according to the first beamforming mode.
22. The base station of claim 21,
the transceiver unit is specifically configured to: transmitting training signals to the terminal according to the downlink transmission beams so that the terminal determines the signal intensity information of the downlink transmission beams and transmits the signal intensity information to the base station;
the processing unit is specifically configured to: determining a primary downlink transmission beam and at least one auxiliary downlink transmission beam for the terminal from the plurality of downlink transmission beams according to the signal strength information of the plurality of downlink transmission beams received by the transceiver unit; or
The processing unit is specifically configured to: receiving, by the transceiver unit, recommended downlink transmission beam information reported by the terminal; determining a primary downlink transmission beam and at least one auxiliary downlink transmission beam for the terminal based on the recommended downlink transmission beam information; or
The processing unit is specifically configured to: determining signal intensity information of a plurality of uplink receiving beams according to the data signals and/or the control signals of the terminal received by the transceiver unit; determining a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at the terminal according to the determined signal intensity information of the plurality of uplink receiving beams; or
The processing unit is specifically configured to: selecting at least one downlink transmission beam from the plurality of downlink transmission beams as a downlink channel state information reference signal (CSI-RS) transmission beam, and transmitting a CSI-RS signal to the terminal by using the downlink CSI-RS transmission beam; and determining a main downlink transmission beam and at least one auxiliary downlink transmission beam aiming at the terminal according to the channel state information received by the transceiver unit and sent by the terminal.
23. The base station of claim 22, wherein the processing unit is specifically configured to:
and receiving, by the transceiver unit, channel state information determined for each CSI-RS signal sent by the terminal, and according to the channel state information, taking a downlink CSI-RS transmission beam corresponding to a CSI-RS signal with the best channel quality in the channel state information as the primary downlink beam, and taking one or more downlink CSI-RS transmission beams other than the downlink CSI-RS transmission beam corresponding to the CSI-RS signal with the best channel quality in the channel state information as the at least one secondary downlink beam.
24. The base station of claim 21, wherein the processing unit is specifically configured to:
configuring N control resource subsets for the terminal, wherein one control resource subset comprises a plurality of resource units used for control channel transmission, and one control resource subset is associated with one downlink transmission beam;
sending the configuration information of the N control resource subsets to the terminal through the transceiver unit so that the terminal monitors the N control resource subsets;
and carrying the indication information of the first beamforming mode in the control signal, and sending the indication information of the first beamforming mode to the terminal through one or more control resource subsets of the N control resource subsets, so that the terminal obtains the indication information of the first beamforming mode in the control signal when monitoring that an effective control channel exists in the N control resource subsets, wherein the effective control channel refers to that the control signal of the control channel is sent to the terminal or to a terminal group where the terminal is located.
25. The base station of claim 21, wherein the processing unit is further configured to:
carrying the indication information of the first beamforming mode in a control signal, and before sending the indication information to the terminal through a control channel, determining a second beamforming mode corresponding to the control signal of the control channel between the terminals, wherein the second beamforming mode is to perform beamforming on the control signal of the control channel through the main downlink sending beam and/or the at least one auxiliary downlink beam;
and carrying the indication information of the first beam forming mode in a control signal, and sending the control signal to the terminal through the control channel after the control signal is subjected to beam forming in the second beam forming mode.
26. The base station of claim 21, wherein the processing unit is further configured to:
updating the first beam forming mode according to the channel state information corresponding to the main downlink transmission beam and the channel state information corresponding to the at least one auxiliary downlink transmission beam which are fed back by the terminal; or
And updating the first beam forming mode according to the main downlink transmission beam and the at least one auxiliary downlink transmission beam when the hybrid automatic repeat request (HARQ) non-response NACK feedback sent by the terminal is continuously received or the feedback of the terminal cannot be received.
27. The base station of claim 26, wherein the transceiver unit is further configured to:
the CSI-RS signal configuration information is sent to the terminal and comprises configuration information of a CSI-RS signal downlink sending beam, and the CSI-RS signal downlink sending beam is one of the main downlink sending beam and the at least one auxiliary downlink sending beam;
transmitting the CSI-RS signal by using the CSI-RS signal downlink transmission wave beam;
and receiving channel state information obtained by the terminal based on the measurement of the CSI-RS signal.
28. The base station of claim 27, wherein the transceiver unit is further configured to:
sending CSI process configuration information to the terminal, wherein the CSI process configuration information comprises association indication information of one or more CSI-RS signals;
and receiving channel state information obtained by the terminal through measurement according to one or more CSI-RS signals related to the CSI process.
29. The base station of any of claims 23 to 28, wherein the first beamforming manner comprises some or all of the following:
the method comprises the steps of carrying out beam forming on signals of a data channel through a main downlink transmission beam, carrying out beam forming on the signals of the data channel through an auxiliary downlink transmission beam, carrying out space division multiplexing beam forming on the signals of the data channel through the main downlink transmission beam and the auxiliary downlink beam, and carrying out diversity beam forming on the signals of the data channel through the main downlink transmission beam and the auxiliary downlink beam.
30. The base station of claim 25 wherein the second beamforming means comprises some or all of:
the method comprises the steps of carrying out beam forming on a control signal of a control channel through a main downlink transmission beam, carrying out beam forming on the control signal of the control channel through an auxiliary downlink transmission beam, and carrying out diversity beam forming on the control signal of the control channel through the main downlink transmission beam and the auxiliary downlink beam.
31. A terminal, comprising:
a transceiver unit, configured to receive configuration information of a main downlink transmission beam and configuration information of at least one auxiliary downlink transmission beam sent by a base station, and determine the main downlink transmission beam and the at least one auxiliary downlink transmission beam; receiving a control signal sent by the base station, wherein the control signal comprises a first beamforming mode corresponding to a signal of a data channel between the base station and a terminal, and the first beamforming mode is to perform beamforming on the signal of the data channel through the main downlink transmission beam and/or the at least one auxiliary downlink beam;
and the processing unit is used for receiving the signal of the data channel sent by the base station according to the first beamforming mode.
32. The terminal according to claim 31, wherein the transceiver unit is specifically configured to:
and receiving the control signal which is sent by the base station through the control channel between the base station and the terminal and is shaped by a second beam forming mode, wherein the second beam forming mode is to shape the control signal of the control channel by the main downlink sending beam and/or the at least one auxiliary downlink beam.
33. The terminal of claim 31, wherein the transceiver unit is further configured to: receiving CSI-RS signal configuration information sent by the base station, wherein the CSI-RS signal configuration information comprises configuration information of a CSI-RS signal downlink sending beam, and the CSI-RS signal downlink sending beam is one of the main downlink sending beam and the at least one auxiliary downlink sending beam;
the processing unit is further configured to: determining a CSI-RS downlink receiving wave beam corresponding to the CSI-RS signal downlink transmitting wave beam, and receiving a CSI-RS signal transmitted by the base station according to the CSI-RS downlink receiving wave beam; and obtaining a channel estimation value according to the received CSI-RS signal, and sending the channel state information to the base station through the transceiving unit after obtaining the channel state information according to the channel estimation value.
34. The terminal of claim 33, wherein the transceiver unit is further configured to: receiving CSI process configuration information sent by the base station, wherein the CSI process configuration information comprises association indication information of one or more CSI-RS signals;
determining one or more CSI-RS signals associated with each process according to the association indication information;
the processing unit is specifically configured to: obtaining channel estimation values of one or more CSI-RS signals associated with each process according to the received CSI-RS signals; and determining channel state information according to the channel estimation values of one or more CSI-RS signals associated with each process and feeding back the channel state information to the base station.
35. The terminal of claim 34, wherein the processing unit is specifically configured to:
respectively determining channel state information corresponding to each CSI-RS signal according to the channel estimation value of each CSI-RS signal associated with each process, and feeding back the channel state information corresponding to each CSI-RS signal to the base station; or
Determining comprehensive channel state information according to the channel estimation value of the CSI-RS signal associated with each CSI process, and feeding the comprehensive channel state information back to the base station; or
And selecting one or more CSI-RS signals according to the channel estimation value of each CSI-RS signal associated with each process, respectively determining and feeding back channel state information corresponding to each selected CSI-RS signal, and feeding back the identification information of each selected CSI-RS signal to the base station.
36. The terminal according to any one of claims 31 to 35, wherein the processing unit is specifically configured to:
the first beam forming mode is that a data channel adopts main downlink transmission beams for transmission, and the processing unit adopts downlink receiving beams corresponding to the main downlink transmission beams for receiving; or
The first beam forming mode is that a data channel adopts auxiliary downlink transmission beams for transmission, and the processing unit receives downlink receiving beams corresponding to the auxiliary downlink transmission beams; or
The first beam forming mode is that a data channel adopts a main downlink transmission beam and an auxiliary downlink beam for space division multiplexing transmission, and the processing unit receives the data channel by using downlink receiving beams corresponding to the main downlink transmission beam and the auxiliary downlink transmission beam respectively;
the first beam forming mode is that a data channel adopts a main downlink transmission beam and an auxiliary downlink beam for diversity transmission, and the processing unit receives by using downlink receiving beams corresponding to the main downlink transmission beam and the auxiliary downlink transmission beam respectively.
37. A base station, comprising:
a processing unit, configured to configure N control resource subsets for a terminal, where one control resource subset includes a plurality of resource units for control channel transmission;
a transceiver unit, configured to send configuration information of the N control resource subsets to the terminal, where the configuration information includes indication information of a downlink transmission beam corresponding to each control resource subset; and sending a control signal to the terminal in at least one control resource subset of the N control resource subsets.
38. The base station of claim 37, wherein the transceiver unit is further configured to transmit the control signal to the terminal on a downlink transmission beam corresponding to at least one of the N control resource subsets.
39. A terminal, comprising:
a transceiver unit, configured to receive configuration information of N control resource subsets sent by a base station, where one control resource subset includes multiple resource units used for control channel transmission, and the configuration information includes indication information of a downlink transmission beam corresponding to each control resource subset; and receiving a control signal sent by the base station through at least one control resource subset in the N control resource subsets.
40. The terminal of claim 39, wherein the terminal further comprises a processing unit to: determining to receive the downlink receiving beam of the control resource subset according to the indication information of the downlink transmitting beam corresponding to the at least one control resource subset;
the transceiver unit is specifically configured to: receiving control signals within the subset of control resources with the downlink receive beam.
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