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CN109219062B - Beam determination method, terminal and network side equipment - Google Patents

Beam determination method, terminal and network side equipment Download PDF

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Publication number
CN109219062B
CN109219062B CN201710522946.8A CN201710522946A CN109219062B CN 109219062 B CN109219062 B CN 109219062B CN 201710522946 A CN201710522946 A CN 201710522946A CN 109219062 B CN109219062 B CN 109219062B
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analog
information
alternative
terminal
digital
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CN109219062A (en
Inventor
左君
徐国珍
王森
王爱玲
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection

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

Abstract

The embodiment of the invention provides a beam determining method, a terminal and network side equipment, wherein the method comprises the following steps: receiving reference signals sent by network side equipment on a plurality of analog beams configured for a terminal; selecting at least one analog beam among the plurality of analog beams according to the received power of the reference signal; determining alternative analog beams according to the selected at least one analog beam; and sending the beam information of the alternative analog beam to the network side equipment. According to the scheme, in the analog beam selection stage, the terminal feeds back a plurality of alternative analog beams, digital beam forming or digital codebook selection is carried out on the selected alternative beams, and the optimal analog beam is determined from the plurality of alternative beams according to the gain of analog-digital hybrid beam forming.

Description

Beam determination method, terminal and network side equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method for determining a beam, a terminal, and a network device.
Background
In the current 3GPP standardization process, a multi-antenna system adopts a mixed architecture of a digital domain and an analog domain. The analog beams are generally selected based on a Beam scanning (Beam scanning) technology, and a Beam with the strongest RSRP is selected as an optimal analog Beam by measuring Reference Signal Received Power (RSRP) of the analog beams, so as to determine digital beams (such as PMI feedback) and perform data transceiving.
Hybrid beamforming techniques are employed in 5G NR systems. The base station can sequentially determine the analog beam and the digital beam for communication according to the information fed back by the user.
In the prior art, a method for a base station to determine an analog beam includes: the base station configures a plurality of analog beams, and sends a reference signal in a beam scanning manner, a user measures Reference Signal Received Power (RSRP) of the analog beams, selects a beam with the strongest RSRP from the analog beams configured by the base station as an analog beam, and performs digital beam forming (for example, digital beam forming is performed by a TDD system in LTE according to channel information reported by the user) or digital codebook selection (for example, a digital beam forming vector is selected by an FDD system in LTE according to a PMI fed back by the user) after the analog beam is determined. The effect of digital beamforming is therefore limited by the analog beam selected.
As shown in fig. 1, in the prior art, when the intensity of the analog beam a is stronger, the analog beam a is directly selected, and actually, the overall intensity of the analog beam B and the digital beam B therein is stronger than the overall intensity of the analog beam a and the digital beam a, the optimal beam should be the analog beam B and the digital beam B.
In particular, when a user is in the side lobes of two adjacent analog beams, the intensity of the analog beam has a relatively limited effect on the user, but the gain of the digital beam is now more pronounced.
The gain of beam forming is determined by the analog beam and the digital beam together, and if the analog beam and the digital beam are selected separately, namely the digital beam is determined after the analog beam is determined only according to the RSRP of the analog beam, it is difficult to ensure that the final beam forming effect is optimal.
Disclosure of Invention
The invention provides a method for determining a beam, a terminal and network side equipment, which ensure the beam forming effect.
To solve the above technical problem, an embodiment of the present invention provides the following solutions:
a method of beam determination, comprising:
receiving reference signals sent by network side equipment on a plurality of analog beams configured for a terminal;
selecting at least one analog beam among the plurality of analog beams according to the received power of the reference signal;
determining alternative analog beams according to the selected at least one analog beam;
and sending the beam information of the alternative analog beam to the network side equipment.
Wherein the selecting at least one of the plurality of analog beams according to the received power of the reference signal comprises:
measuring the receiving power of the plurality of analog beams according to the reference signal to obtain the receiving power of the parameter signal;
selecting at least one analog beam among the plurality of analog beams according to the received power of the reference signal.
Wherein the selecting at least one of the plurality of analog beams according to the received power of the reference signal comprises:
selecting, among the plurality of analog beams, that RSRP is satisfied according to the received power of the reference signalA>RSRPavailableA plurality of first analog beams of x N%; or
Selecting, among the plurality of analog beams, that RSRP is satisfied according to the received power of the reference signalB>RSRPmaxA plurality of second analog beams of x N% as alternative analog beams;
wherein, RSRPAThe received power, RSRP, of the reference signal representing the first analog beamavailableRepresenting the power strength of the analog beams that can be used for access;
RSRPBreceived power, RSRP, of reference signals representing the second analog beammaxThe receiving power of the analog beam with the strongest receiving power of the reference signal received by the terminal is represented; n is a positive integer.
Wherein N is a positive integer greater than or equal to 95.
Wherein, according to the selected at least one analog beam, the step of determining the alternative analog beam comprises:
and determining the selected at least one first analog beam or the selected at least one second analog beam as an alternative analog beam.
Wherein, according to the selected at least one analog beam, the step of determining the alternative analog beam comprises:
if the number of the selected at least one first beam or the number of the selected at least one second beam is larger than a preset value, selecting M analog beams with receiving power larger than a preset power threshold value from the at least one first beam or the at least one second beam as alternative analog beams; or
And adjusting the value of N to enable the number of the selected at least one first beam or the number of the selected at least one second beam to be smaller than or equal to the preset value.
The method for determining the beam further comprises the following steps:
receiving configuration information of a Sounding Reference Signal (SRS) sent by the network side equipment according to the received beam information of the alternative analog beam;
and sending an SRS to the network side equipment according to the configuration information, so that the network side equipment obtains the beam information of the digital beam corresponding to the alternative analog beam by utilizing reciprocity of uplink and downlink channels according to the SRS, and determines a mixed beam according to the beam information of the digital beam and the beam information of the alternative analog beam.
The method for determining the beam further comprises the following steps:
and determining a mixed beam according to the beam information of the alternative analog beam and a codebook set of the pre-configured digital beam, and feeding back the beam information of the mixed beam to the network side equipment.
Wherein, the step of determining the mixed beam according to the beam information of the alternative analog beam and the codebook set of the pre-configured digital beam comprises:
receiving a channel state information reference signal (CSI-RS) sent by the network side equipment through the alternative analog beam;
acquiring downlink channel information according to the received CSI-RS;
obtaining an optimal digital codebook index corresponding to the alternative analog beam according to the downlink channel information and a codebook set of a pre-configured digital beam;
calculating the hybrid beam forming gain according to the downlink channel information and the optimal digital codebook index corresponding to the alternative analog beam;
and determining the analog beam and the digital beam with the strongest mixed beam forming gain as a mixed beam.
The method for determining the beam further comprises the following steps:
and receiving data information sent by the network side equipment in the mixed beam.
The embodiment of the present invention further provides a method for determining a beam, including:
transmitting a reference signal to a terminal on a plurality of analog beams configured for the terminal;
and receiving beam information of alternative analog beams fed back by the terminal, wherein the alternative analog beams are determined by the terminal according to the received power of the reference signal, at least one analog beam selected from the multiple analog beams and the selected at least one analog beam.
Wherein, after receiving the beam information of the alternative analog beam fed back by the terminal, the method further comprises:
determining a mixed beam according to the received beam information of the alternative analog beam; or
And receiving the beam information of the mixed beam transmitted by the terminal.
Wherein, the step of determining the mixed beam according to the beam information of the received alternative analog beam comprises:
determining a digital beam according to the received beam information of the alternative analog beam;
and determining a mixed beam according to the alternative analog beam and the digital beam.
Wherein, the step of determining the digital beam according to the beam information of the received alternative analog beam comprises:
configuring configuration information of a sending SRS according to the received beam information of the alternative analog beam, and sending the configuration information to a terminal;
receiving an SRS sent by the terminal according to the configuration information;
and obtaining the beam information of the digital beam corresponding to the alternative analog beam according to the SRS by utilizing the reciprocity of the uplink and downlink channels.
Wherein the step of determining a hybrid beam based on the digital beam and the alternative analog beam comprises:
calculating a hybrid beam forming gain according to the beam information of the analog beam and the beam information of the digital beam;
and selecting the analog beam and the digital beam combination with the strongest mixed beam forming gain as the mixed beam.
The step of receiving the beam information of the mixed beam transmitted by the terminal includes:
transmitting CSI-RS information to the terminal according to the received beam information of the alternative analog beam;
receiving beam information of a mixed beam fed back by a terminal, wherein the mixed beam is downlink channel information obtained by the terminal according to the received CSI-RS; obtaining an optimal digital codebook index corresponding to the alternative analog beam according to the downlink channel information and a codebook set of the digital beam configured in advance; calculating the mixed beam forming gain according to the downlink channel information and the optimal digital codebook index corresponding to the alternative analog beam; and combining the analog beam with the strongest hybrid beam forming gain and the digital beam.
The method for determining the beam further comprises the following steps:
data information is transmitted to the terminal in a hybrid beam.
An embodiment of the present invention further provides a terminal, including:
the receiver is used for receiving reference signals sent by the network side equipment on a plurality of analog beams configured for the terminal;
a processor configured to select at least one analog beam among the plurality of analog beams according to a received power of the reference signal; determining alternative analog beams according to the selected at least one analog beam;
a transmitter, configured to send the beam information of the alternative analog beam to the network side device.
Wherein, when the processor selects at least one analog beam, it is specifically configured to: measuring the receiving power of the plurality of analog beams according to the reference signal to obtain the receiving power of the parameter signal; selecting at least one analog beam among the plurality of analog beams according to the received power of the reference signal.
Wherein, when the processor selects the analog beam according to the received power of the parameter signal, the processor is specifically configured to: selecting, among the plurality of analog beams, that RSRP is satisfied according to the received power of the reference signalA>RSRPavailableA plurality of first analog beams of x N%; or selecting the received power of the reference signal to satisfy RSRP among the plurality of analog beamsB>RSRPmaxA plurality of second analog beams of x N% as alternative analog beams;
wherein, RSRPAThe received power, RSRP, of the reference signal representing the first analog beamavailableRepresenting the power strength of the analog beams that can be used for access;
RSRPBreceived power, RSRP, of reference signals representing the second analog beammaxThe receiving power of the analog beam with the strongest receiving power of the reference signal received by the terminal is represented; n is a positive integer.
Wherein N is a positive integer greater than or equal to 95.
When the processor selects the alternative analog beam, the processor is specifically configured to determine the selected at least one first analog beam or the selected at least one second analog beam as the alternative analog beam; or judging whether the number of the selected at least one first beam or the number of the selected at least one second beam is greater than a preset value, and selecting M analog beams with receiving power greater than a preset power threshold value from the at least one first beam or the at least one second beam as alternative analog beams; or adjusting the value of N to enable the number of the selected at least one first beam or the number of the selected at least one second beam to be smaller than or equal to the preset value.
Wherein the receiver is further configured to: receiving configuration information of a Sounding Reference Signal (SRS) sent by the network side equipment according to the received beam information of the alternative analog beam;
the transmitter is further configured to send an SRS to the network side device according to the configuration information, so that the network side device obtains beam information of a digital beam corresponding to the alternative analog beam according to the SRS by using reciprocity of uplink and downlink channels, and determines a hybrid beam according to the beam information of the digital beam and the beam information of the alternative analog beam.
The transmitter is further configured to determine a mixed beam according to the beam information of the alternative analog beam and a codebook set of the preconfigured digital beam, and feed back the beam information of the mixed beam to the network-side device.
Wherein the receiver is further configured to: receiving a channel state information reference signal (CSI-RS) sent by the network side equipment through the alternative analog beam;
acquiring downlink channel information according to the received CSI-RS;
obtaining an optimal digital codebook index corresponding to the alternative analog beam according to the downlink channel information and a codebook set of a pre-configured digital beam;
calculating the hybrid beam forming gain according to the downlink channel information and the optimal digital codebook index corresponding to the alternative analog beam;
and determining the analog beam and the digital beam with the strongest mixed beam forming gain as a mixed beam.
Wherein, the receiver is further configured to receive data information sent by the network side device in a hybrid beam.
An embodiment of the present invention further provides a terminal, including:
the receiving module is used for receiving reference signals sent by network side equipment on a plurality of analog beams configured for the terminal;
a processing module, configured to select at least one analog beam among the plurality of analog beams according to a received power of the reference signal; determining alternative analog beams according to the selected at least one analog beam;
a sending module, configured to send the beam information of the alternative analog beam to the network side device.
An embodiment of the present invention further provides a terminal, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above.
Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.
An embodiment of the present invention further provides a network side device, including:
a transmitter for transmitting a reference signal to a terminal on a plurality of analog beams configured for the terminal;
and the receiver is used for receiving beam information of alternative analog beams fed back by the terminal, wherein the alternative analog beams are determined by the terminal according to the received power of the reference signal, at least one analog beam selected from the plurality of analog beams and the selected at least one analog beam.
An embodiment of the present invention further provides a network side device, including:
a transmitting module, configured to transmit a reference signal to a terminal on a plurality of analog beams configured for the terminal;
and a receiving module, configured to receive beam information of a candidate analog beam fed back by the terminal, where the candidate analog beam is determined by the terminal by selecting at least one analog beam from the multiple analog beams according to the received power of the reference signal and according to the selected at least one analog beam.
An embodiment of the present invention further provides a network side device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above.
Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.
The scheme of the invention at least comprises the following beneficial effects:
according to the scheme of the invention, reference signals sent by network side equipment on a plurality of analog beams configured for a terminal are received; selecting at least one analog beam among the plurality of analog beams according to the received power of the reference signal; determining alternative analog beams according to the selected at least one analog beam; and sending the beam information of the alternative analog beams to the network side equipment, so that the terminal can feed back a plurality of alternative analog beams in an analog beam selection stage, perform digital beam forming or digital codebook selection in the selected alternative beams, and determine an optimal analog beam from the plurality of alternative beams according to the gain of analog-digital hybrid beam forming.
Drawings
FIG. 1 is a diagram of a conventional beam;
fig. 2 is a flowchart of a beam determination method according to a first embodiment of the present invention;
FIG. 3 is a flow chart of a beam determination method according to a second embodiment of the present invention;
fig. 4 is a flowchart of a third embodiment of the beam determination method of the present invention;
fig. 5 is a flowchart of a fourth embodiment of the beam determination method of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 2, an embodiment of the present invention provides a method for determining a beam, including:
step 21, receiving reference signals sent by a network side device on a plurality of analog beams configured for a terminal;
step 22, selecting at least one analog beam from the plurality of analog beams according to the received power of the reference signal;
step 23, determining alternative analog beams according to the selected at least one analog beam;
and step 24, sending the beam information of the alternative analog beam to the network side device.
In this embodiment of the present invention, reference signals sent by a network side device on a plurality of analog beams configured for a terminal are received; selecting at least one analog beam among the plurality of analog beams according to the received power of the reference signal; determining alternative analog beams according to the selected at least one analog beam; and sending the beam information of the alternative analog beams to the network side equipment, so that the terminal can feed back a plurality of alternative analog beams in an analog beam selection stage, perform digital beam forming or codebook selection of the digital beams in the selected alternative analog beams, and determine the optimal analog beam from the plurality of alternative analog beams according to the gain of analog-digital mixed beam forming.
In this embodiment, step 22 may specifically include:
step 221, measuring the received power of the plurality of analog beams according to the reference signal to obtain the received power of the parameter signal;
step 222, selecting at least one analog beam from the plurality of analog beams according to the received power of the reference signal.
Wherein step 222 may comprise:
step 2221, according to the received power of the reference signal, selecting the analog beams that satisfy RSRPA>RSRPavailableX N% of a plurality of first analog beams, wherein RSRPAThe received power, RSRP, of the reference signal representing the first analog beamavailableCan represent byIn the power intensity of the accessed analog beam, N is a positive integer, preferably, N is a positive integer greater than or equal to 95; or
Step 2222, according to the received power of the reference signal, selecting the analog beams that satisfy RSRPB>RSRPmaxA plurality of second analog beams of x N% as alternative analog beams;
wherein, RSRPBReceived power, RSRP, of reference signals representing the second analog beammaxThe receiving power of the analog beam with the strongest receiving power of the reference signal received by the terminal is represented; n is a positive integer, preferably, N is a positive integer greater than or equal to 95.
In this embodiment, step 23 may specifically include:
step 231, determining the selected at least one first analog beam as an alternative analog beam; or
Step 232, determining the selected at least one second analog beam as an alternative analog beam; or
Step 233, if the number of the selected at least one first beam or the number of the selected at least one second beam is greater than a preset value, selecting M analog beams with receiving power greater than a preset power threshold from the at least one first beam or the at least one second beam as alternative analog beams; or
Step 234, adjusting the value of N to make the number of the selected at least one first beam or the number of the selected at least one second beam smaller than or equal to the preset value.
As shown in fig. 3, another embodiment of the present invention provides a method for determining a beam, including:
step 31, receiving reference signals sent by a network side device on a plurality of analog beams configured for a terminal;
step 32, selecting at least one analog beam from the plurality of analog beams according to the received power of the reference signal;
step 33, determining alternative analog beams according to the selected at least one analog beam;
step 34, sending the beam information of the alternative analog beam to the network side device;
step 35, receiving configuration information of a sounding reference signal SRS, which is sent by the network side device according to the received beam information of the alternative analog beam;
step 36, sending an SRS to the network side device according to the configuration information, so that the network side device obtains, according to the SRS, beam information of a digital beam corresponding to the alternative analog beam by using reciprocity of uplink and downlink channels, and determines a hybrid beam according to the beam information of the digital beam and the beam information of the alternative analog beam.
Specifically, if the uplink and downlink channels of the system have reciprocity, the base station configures SRS information according to the alternative analog beam fed back by the user and transmits the information to the user; the user sends the SRS on the wave beam configured by the base station according to the configuration information, the base station receives and detects the SRS on the alternative analog wave beam to obtain the uplink channel information, the downlink channel information is estimated by utilizing the channel reciprocity, the optimal digital wave beam forming is calculated according to the downlink channel information, so that the base station can obtain the digital wave beam forming vector of each alternative analog wave beam, obtain the mixed wave beam forming gain (the mixed wave beam forming gain can be obtained by calculating the norm of the product of a channel matrix and a digital wave beam forming matrix), and select the analog wave beam with the strongest mixed wave beam forming gain to be matched with the digital wave beam, thereby determining the mixed wave beam.
As shown in fig. 4, another embodiment of the present invention provides a method for determining a beam, including:
step 41, receiving reference signals sent by a network side device on a plurality of analog beams configured for a terminal;
step 42, selecting at least one analog beam from the plurality of analog beams according to the received power of the reference signal;
step 43, determining alternative analog beams according to the selected at least one analog beam;
step 44, sending the beam information of the alternative analog beam to the network side device;
and step 45, determining a mixed beam according to the beam information of the alternative analog beam and the codebook set of the pre-configured digital beam, and feeding back the beam information of the mixed beam to the network side equipment.
Wherein, step 45 may specifically include:
step 451, receiving a channel state information reference signal CSI-RS sent by the network side device through the alternative analog beam;
step 452, obtaining downlink channel information according to the received CSI-RS;
step 453, obtaining an optimal digital codebook index corresponding to the candidate analog beam according to the downlink channel information and a codebook set of a pre-configured digital beam;
step 454, calculating a hybrid beam forming gain according to the downlink channel information and the optimal digital codebook index corresponding to the alternative analog beam;
step 455, determine the analog beam and the digital beam with the strongest hybrid beam forming gain, and combine them into a hybrid beam.
Further, the method for determining a beam may further include:
and receiving data information sent by the network side equipment in the mixed beam.
In this embodiment of the present invention, if there is no reciprocity between the uplink and downlink channels of the system, the digital beam may be selected according to a pre-configured digital codebook (which may be a digital codebook configured according to an alternative analog beam), where the digital codebook is a set of digital codebooks that have been pre-configured and known to the base station and the user. The base station (belonging to network side equipment) sends CSI-RS through alternative analog beam information fed back by a user, the user determines downlink channel information and an optimal digital codebook index (PMI) corresponding to each analog beam according to the received CSI-RS, and selects an analog beam + digital beam combination with the strongest hybrid beam forming gain, wherein one selection rule is the beam combination with the strongest norm of an equivalent channel (the product of a channel matrix and a digital codebook). Then, the user feeds back corresponding information (including CRI, PMI, CQI, RI, etc.) to the base station, and the base station determines the optimal analog beam + digital beam combination according to the received feedback information.
In the method for determining a beam provided in the above embodiment of the present invention, in the analog beam selection stage, a user feeds back a plurality of candidate analog beams, and performs digital beamforming or digital codebook selection in the selected candidate beams, and determines an optimal analog beam from the plurality of candidate analog beams according to a gain of analog-digital hybrid beamforming, thereby increasing a data communication rate of the 5G NR device.
The embodiment of the invention overcomes the defect of beam selection purely based on analog beam information; adapted for beam coverage edge users; the frequency of analog beam replacement can be limited by adjusting parameters of selection criteria of alternative analog beams, and the stability of the system is maintained.
An embodiment of the present invention further provides a terminal, including:
the receiving module is used for receiving reference signals sent by network side equipment on a plurality of analog beams configured for the terminal;
a processing module, configured to select at least one analog beam among the plurality of analog beams according to a received power of the reference signal; determining alternative analog beams according to the selected at least one analog beam;
a sending module, configured to send the beam information of the alternative analog beam to the network side device.
It should be noted that the terminal is an apparatus corresponding to the method shown in fig. 2 to 4, and all the implementations in the embodiments shown in fig. 2 to 4 are applicable to the embodiment of the terminal, and the same technical effect can be achieved.
An embodiment of the present invention further provides a terminal, including:
the receiver is used for receiving reference signals sent by the network side equipment on a plurality of analog beams configured for the terminal;
a processor configured to select at least one analog beam among the plurality of analog beams according to a received power of the reference signal; determining alternative analog beams according to the selected at least one analog beam;
a transmitter, configured to send the beam information of the alternative analog beam to the network side device.
Wherein, when the processor selects at least one analog beam, it is specifically configured to: measuring the receiving power of the plurality of analog beams according to the reference signal to obtain the receiving power of the parameter signal; selecting at least one analog beam among the plurality of analog beams according to the received power of the reference signal.
Wherein, when the processor selects the analog beam according to the received power of the parameter signal, the processor is specifically configured to: selecting, among the plurality of analog beams, that RSRP is satisfied according to the received power of the reference signalA>RSRPavailableA plurality of first analog beams of x N%; or selecting the received power of the reference signal to satisfy RSRP among the plurality of analog beamsB>RSRPmaxA plurality of second analog beams of x N% as alternative analog beams;
wherein, RSRPAThe received power, RSRP, of the reference signal representing the first analog beamavailableRepresenting the power strength of the analog beams that can be used for access;
RSRPBreceived power, RSRP, of reference signals representing the second analog beammaxThe receiving power of the analog beam with the strongest receiving power of the reference signal received by the terminal is represented; n is a positive integer.
Wherein N is a positive integer greater than or equal to 95.
When the processor selects the alternative analog beam, the processor is specifically configured to determine the selected at least one first analog beam or the selected at least one second analog beam as the alternative analog beam; or judging whether the number of the selected at least one first beam or the number of the selected at least one second beam is greater than a preset value, and selecting M analog beams with receiving power greater than a preset power threshold value from the at least one first beam or the at least one second beam as alternative analog beams; or adjusting the value of N to enable the number of the selected at least one first beam or the number of the selected at least one second beam to be smaller than or equal to the preset value.
Wherein the receiver is further configured to: receiving configuration information of a Sounding Reference Signal (SRS) sent by the network side equipment according to the received beam information of the alternative analog beam;
the transmitter is further configured to send an SRS to the network side device according to the configuration information, so that the network side device obtains beam information of a digital beam corresponding to the alternative analog beam according to the SRS by using reciprocity of uplink and downlink channels, and determines a hybrid beam according to the beam information of the digital beam and the beam information of the alternative analog beam.
The transmitter is further configured to determine a mixed beam according to the beam information of the alternative analog beam and a codebook set of the preconfigured digital beam, and feed back the beam information of the mixed beam to the network-side device.
Wherein the receiver is further configured to: receiving a channel state information reference signal (CSI-RS) sent by the network side equipment through the alternative analog beam;
acquiring downlink channel information according to the received CSI-RS;
obtaining an optimal digital codebook index corresponding to the alternative analog beam according to the downlink channel information and a codebook set of a pre-configured digital beam;
calculating the hybrid beam forming gain according to the downlink channel information and the optimal digital codebook index corresponding to the alternative analog beam;
and determining the analog beam and the digital beam with the strongest mixed beam forming gain as a mixed beam.
Wherein, the receiver is further configured to receive data information sent by the network side device in a hybrid beam.
It should be noted that, in the embodiment of the terminal, the receiver and the processor may be connected through a bus or an interface, and the transmitter and the processor may be connected through a bus or an interface, and the terminal-side methods shown in fig. 2 to 4 are all applicable to the embodiment of the terminal, and the same technical effect can be achieved.
An embodiment of the present invention further provides a terminal, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above with reference to fig. 2-4.
Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method described above with respect to fig. 2-4.
As shown in fig. 5, an embodiment of the present invention further provides a method for determining a beam, including:
step 51, transmitting reference signals to the terminal on a plurality of analog beams configured for the terminal;
and step 52, receiving beam information of alternative analog beams fed back by the terminal, wherein the alternative analog beams are determined by the terminal according to the received power of the reference signal, at least one analog beam selected from the analog beams, and the selected at least one analog beam.
This embodiment of the present invention transmits a reference signal to a terminal by on a plurality of analog beams configured for the terminal; and receiving beam information of alternative analog beams fed back by the terminal, wherein the alternative analog beams are determined by the terminal according to the received power of the reference signal, at least one analog beam selected from the multiple analog beams and the selected at least one analog beam. Therefore, a plurality of alternative analog beams can be fed back by a user in the analog beam selection stage, digital beam forming or digital codebook selection is carried out in the selected alternative beams, an optimal analog beam is determined from the plurality of alternative beams according to the gain of analog-digital mixed beam forming, and the data communication rate of the 5G NR equipment is improved.
Further, after receiving the beam information of the alternative analog beam fed back by the terminal, the method may further include:
step 53, determining a mixed beam according to the received beam information of the alternative analog beam; or
And step 54, receiving the beam information of the mixed beam transmitted by the terminal.
Wherein, step 53 may specifically include:
step 531, determining a digital beam according to the beam information of the received alternative analog beam; and determining a mixed beam according to the alternative analog beam and the digital beam.
Wherein, step 531 may comprise:
step 5311, configuring the configuration information of the SRS to be transmitted according to the received beam information of the alternative analog beam, and sending the configuration information to the terminal;
step 5312, receiving the SRS sent by the terminal according to the configuration information;
step 5313, obtaining beam information of a digital beam corresponding to the alternative analog beam according to the SRS by using reciprocity of uplink and downlink channels;
step 5314, calculating a hybrid beam forming gain according to the beam information of the analog beam and the beam information of the digital beam;
step 5315, selecting the analog beam and digital beam combination with the strongest hybrid beam forming gain as the hybrid beam.
Wherein, step 54 may specifically include:
step 541, sending CSI-RS information to the terminal according to the received beam information of the alternative analog beam;
step 542, receiving beam information of a mixed beam fed back by a terminal, wherein the mixed beam is downlink channel information obtained by the terminal according to the received CSI-RS; obtaining an optimal digital codebook index corresponding to the alternative analog beam according to the downlink channel information and a codebook set of the digital beam configured in advance; calculating the mixed beam forming gain according to the downlink channel information and the optimal digital codebook index corresponding to the alternative analog beam; and selecting the combination of the analog beam and the digital beam with the strongest hybrid beam forming gain.
Further, the method for determining a beam provided in this embodiment of the present invention may further include:
step 55, data information is sent to the terminal in the hybrid beam.
In the method for determining a beam provided in the above embodiment of the present invention, in the analog beam selection stage, a user feeds back a plurality of candidate analog beams, and performs digital beamforming or digital codebook selection in the selected candidate beams, and determines an optimal analog beam from the plurality of candidate beams according to a gain of analog-digital hybrid beamforming, thereby increasing a data communication rate of the 5G NR device.
The embodiment of the invention overcomes the defect of beam selection purely based on analog beam information; adapted for beam coverage edge users; the frequency of analog beam changes may be limited by adjusting parameters of the selection criteria of the alternative analog beams (e.g., parameter N described above), maintaining system stability.
An embodiment of the present invention further provides a network side device, including:
a transmitting module, configured to transmit a reference signal to a terminal on a plurality of analog beams configured for the terminal;
and a receiving module, configured to receive beam information of a candidate analog beam fed back by the terminal, where the candidate analog beam is determined by the terminal by selecting at least one analog beam from the multiple analog beams according to the received power of the reference signal and according to the selected at least one analog beam.
It should be noted that the embodiment of the network side device is a device corresponding to the embodiment of the method shown in fig. 5, and all implementation manners in the embodiment of the method shown in fig. 5 are applied to the embodiment of the network side device, and the same technical effects can be achieved.
An embodiment of the present invention further provides a network side device, including:
a transmitter for transmitting a reference signal to a terminal on a plurality of analog beams configured for the terminal;
and the receiver is used for receiving beam information of alternative analog beams fed back by the terminal, wherein the alternative analog beams are determined by the terminal according to the received power of the reference signal, at least one analog beam selected from the plurality of analog beams and the selected at least one analog beam.
In the embodiment of the network side device, the method of the network side shown in fig. 5 is all applied to the embodiment of the terminal, and the same technical effect can be achieved.
An embodiment of the present invention further provides a network side device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above with reference to fig. 5.
Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method described above with respect to fig. 5.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (25)

1. A method for determining a beam, comprising:
receiving reference signals sent by network side equipment on a plurality of analog beams configured for a terminal;
selecting at least one analog beam among the plurality of analog beams according to the received power of the reference signal;
determining alternative analog beams according to the selected at least one analog beam;
if the uplink and downlink channels of the system have reciprocity, the beam information of the alternative analog beam is sent to the network side equipment; receiving and detecting an SRS on the alternative analog beams by the network side equipment to obtain uplink channel information, estimating the downlink channel information by utilizing channel reciprocity, calculating optimal digital beam forming according to the downlink channel information to obtain digital beam forming vectors of the alternative analog beams, obtaining mixed beam forming gain, and selecting the analog beam with the strongest mixed beam forming gain and the digital beam for pairing so as to determine the mixed beam;
if the uplink and downlink channels of the system have no reciprocity, determining a mixed beam according to the beam information of the alternative analog beam and a codebook set of the pre-configured digital beam, wherein the method comprises the following steps: receiving a channel state information reference signal (CSI-RS) sent by the network side equipment through the alternative analog beam; acquiring downlink channel information according to the received CSI-RS; obtaining an optimal digital codebook index corresponding to the alternative analog beam according to the downlink channel information and a codebook set of a pre-configured digital beam; calculating the hybrid beam forming gain according to the downlink channel information and the optimal digital codebook index corresponding to the alternative analog beam; and determining the analog beam and the digital beam with the strongest mixed beam forming gain as a mixed beam.
2. The method of claim 1, wherein the step of selecting at least one of the plurality of analog beams according to the received power of the reference signal comprises:
measuring the receiving power of the plurality of analog beams according to the reference signal to obtain the receiving power of the reference signal;
selecting at least one analog beam among the plurality of analog beams according to the received power of the reference signal.
3. The method of claim 2, wherein the step of selecting at least one of the plurality of analog beams based on the received power of the reference signal comprises:
selecting, among the plurality of analog beams, that RSRP is satisfied according to the received power of the reference signalA>RSRPavailableA plurality of first analog beams of x N%; or
Selecting, among the plurality of analog beams, that RSRP is satisfied according to the received power of the reference signalB>RSRPmaxA plurality of second analog beams of x N% as alternative analog beams;
wherein, RSRPAThe received power, RSRP, of the reference signal representing the first analog beamavailableRepresenting the power strength of the analog beams that can be used for access;
RSRPBreceived power, RSRP, of reference signals representing the second analog beammaxThe receiving power of the analog beam with the strongest receiving power of the reference signal received by the terminal is represented; n is a positive integer.
4. The method of determining a beam of claim 3, wherein N is a positive integer greater than or equal to 95.
5. The method of claim 3, wherein the step of determining the alternative analog beam based on the selected at least one analog beam comprises:
and determining the selected at least one first analog beam or the selected at least one second analog beam as an alternative analog beam.
6. The method of claim 3, wherein the step of determining the alternative analog beam based on the selected at least one analog beam comprises:
if the number of the selected at least one first beam or the number of the selected at least one second beam is larger than a preset value, selecting M analog beams with receiving power larger than a preset power threshold value from the at least one first beam or the at least one second beam as alternative analog beams; or
And adjusting the value of N to enable the number of the selected at least one first beam or the number of the selected at least one second beam to be smaller than or equal to the preset value.
7. The method for determining a beam according to claim 1, further comprising:
and receiving data information sent by the network side equipment in the mixed beam.
8. A method for determining a beam is applied to a network side device, and the method for determining the beam comprises the following steps:
transmitting a reference signal to a terminal on a plurality of analog beams configured for the terminal;
receiving beam information of alternative analog beams fed back by the terminal, wherein the alternative analog beams are determined by the terminal according to at least one selected analog beam in the plurality of analog beams according to the received power of the reference signal;
if the uplink and downlink channels of the system have reciprocity, receiving and detecting an SRS on the alternative analog beams to obtain uplink channel information, estimating the downlink channel information by utilizing the channel reciprocity, and calculating the optimal digital beam forming according to the downlink channel information so as to obtain the digital beam forming vector of each alternative analog beam and obtain mixed beam forming gain;
if the uplink and downlink channels of the system have no reciprocity, after receiving the beam information of the alternative analog beam fed back by the terminal, receiving the beam information of the mixed beam sent by the terminal, including: transmitting CSI-RS information to the terminal according to the received beam information of the alternative analog beam; receiving beam information of a mixed beam fed back by a terminal, wherein the mixed beam is downlink channel information obtained by the terminal according to the received CSI-RS; obtaining an optimal digital codebook index corresponding to the alternative analog beam according to the downlink channel information and a pre-configured digital beam codebook set; calculating the mixed beam forming gain according to the downlink channel information and the optimal digital codebook index corresponding to the alternative analog beam; and combining the analog beam with the strongest hybrid beam forming gain and the digital beam.
9. The method of claim 8, wherein the step of determining the hybrid beam according to the beam information of the received alternative analog beam comprises:
determining a digital beam according to the received beam information of the alternative analog beam;
and determining a mixed beam according to the alternative analog beam and the digital beam.
10. The method of claim 9, wherein the step of determining the digital beam based on the beam information of the received alternative analog beam comprises:
configuring configuration information of a sending SRS according to the received beam information of the alternative analog beam, and sending the configuration information to a terminal;
receiving an SRS sent by the terminal according to the configuration information;
and obtaining the beam information of the digital beam corresponding to the alternative analog beam according to the SRS by utilizing the reciprocity of the uplink and downlink channels.
11. The method of claim 9, wherein the step of determining a hybrid beam based on the digital beam and the alternative analog beam comprises:
calculating a hybrid beam forming gain according to the beam information of the analog beam and the beam information of the digital beam;
and selecting the analog beam and the digital beam combination with the strongest mixed beam forming gain as the mixed beam.
12. The method for determining a beam according to claim 9, further comprising:
data information is transmitted to the terminal in a hybrid beam.
13. A terminal, comprising:
the receiver is used for receiving reference signals sent by the network side equipment on a plurality of analog beams configured for the terminal;
a processor configured to select at least one analog beam among the plurality of analog beams according to a received power of the reference signal; determining alternative analog beams according to the selected at least one analog beam;
a transmitter, configured to send beam information of the alternative analog beam to the network side device;
receiving and detecting an SRS on the alternative analog beams by the network side equipment to obtain uplink channel information, estimating the downlink channel information by utilizing channel reciprocity, and calculating optimal digital beam forming according to the downlink channel information so as to obtain digital beam forming vectors of the alternative analog beams and obtain mixed beam forming gain;
the receiver is further configured to: if the uplink and downlink channels of the system have reciprocity, receiving configuration information of a Sounding Reference Signal (SRS) sent by the network side equipment according to the received beam information of the alternative analog beam;
the transmitter is further configured to send an SRS to the network side device according to the configuration information, so that the network side device obtains beam information of a digital beam corresponding to the alternative analog beam according to the SRS by using reciprocity of uplink and downlink channels, and determines a hybrid beam according to the beam information of the digital beam and the beam information of the alternative analog beam;
the transmitter is further configured to determine a hybrid beam according to the beam information of the alternative analog beam and a codebook set of a pre-configured digital beam if an uplink channel and a downlink channel of the system have no reciprocity;
the receiver is further configured to: receiving a channel state information reference signal (CSI-RS) sent by the network side equipment through the alternative analog beam; acquiring downlink channel information according to the received CSI-RS; obtaining an optimal digital codebook index corresponding to the alternative analog beam according to the downlink channel information and a codebook set of a pre-configured digital beam; calculating the hybrid beam forming gain according to the downlink channel information and the optimal digital codebook index corresponding to the alternative analog beam; and determining the analog beam and the digital beam with the strongest mixed beam forming gain as a mixed beam.
14. The terminal of claim 13, wherein the processor, when selecting at least one analog beam, is configured to: measuring the receiving power of the plurality of analog beams according to the reference signal to obtain the receiving power of the reference signal; selecting at least one analog beam among the plurality of analog beams according to the received power of the reference signal.
15. The terminal of claim 14, wherein the processor, when selecting the analog beam based on the received power of the reference signal, is configured to: selecting, among the plurality of analog beams, that RSRP is satisfied according to the received power of the reference signalA>RSRPavailableA plurality of first analog beams of x N%; or selecting the received power of the reference signal to satisfy RSRP among the plurality of analog beamsB>RSRPmaxA plurality of second analog beams of x N% as alternative analog beams;
wherein, RSRPAThe received power, RSRP, of the reference signal representing the first analog beamavailableRepresenting the power strength of the analog beams that can be used for access;
RSRPBreceived power, RSRP, of reference signals representing the second analog beammaxThe receiving power of the analog beam with the strongest receiving power of the reference signal received by the terminal is represented; n is a positive integer.
16. The terminal of claim 15, wherein N is a positive integer greater than or equal to 95.
17. The terminal according to claim 15, wherein the processor is configured to, when selecting the alternative analog beam, specifically, determine the selected at least one first analog beam or the selected at least one second analog beam as the alternative analog beam; or judging whether the number of the selected at least one first beam or the number of the selected at least one second beam is greater than a preset value, and selecting M analog beams with receiving power greater than a preset power threshold value from the at least one first beam or the at least one second beam as alternative analog beams; or adjusting the value of N to enable the number of the selected at least one first beam or the number of the selected at least one second beam to be smaller than or equal to the preset value.
18. The terminal of claim 13, wherein the receiver is further configured to receive data information sent by the network-side device in a hybrid beam.
19. A terminal, comprising:
the receiving module is used for receiving reference signals sent by network side equipment on a plurality of analog beams configured for the terminal;
a processing module, configured to select at least one analog beam among the plurality of analog beams according to a received power of the reference signal; determining alternative analog beams according to the selected at least one analog beam;
a sending module, configured to send the beam information of the alternative analog beam to the network side device;
receiving and detecting an SRS on the alternative analog beams by the network side equipment to obtain uplink channel information, estimating the downlink channel information by utilizing channel reciprocity, and calculating optimal digital beam forming according to the downlink channel information so as to obtain digital beam forming vectors of the alternative analog beams and obtain mixed beam forming gain;
the receiving module is further configured to: if the uplink and downlink channels of the system have reciprocity, receiving configuration information of a Sounding Reference Signal (SRS) sent by the network side equipment according to the received beam information of the alternative analog beam;
the sending module is further configured to send an SRS to the network side device according to the configuration information, so that the network side device obtains beam information of a digital beam corresponding to the alternative analog beam according to the SRS by using reciprocity of uplink and downlink channels, and determines a hybrid beam according to the beam information of the digital beam and the beam information of the alternative analog beam;
the sending module is further configured to determine a hybrid beam according to the beam information of the alternative analog beam and a codebook set of a pre-configured digital beam if an uplink channel and a downlink channel of the system have no reciprocity;
the receiving module is further configured to: receiving a channel state information reference signal (CSI-RS) sent by the network side equipment through the alternative analog beam; acquiring downlink channel information according to the received CSI-RS; obtaining an optimal digital codebook index corresponding to the alternative analog beam according to the downlink channel information and a codebook set of a pre-configured digital beam; calculating the hybrid beam forming gain according to the downlink channel information and the optimal digital codebook index corresponding to the alternative analog beam; and determining the analog beam and the digital beam with the strongest mixed beam forming gain as a mixed beam.
20. A terminal, comprising: a processor, a memory storing a computer program which, when executed by the processor, performs the method of any one of claims 1-7.
21. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 1-7.
22. A network-side device, comprising:
a transmitter for transmitting a reference signal to a terminal on a plurality of analog beams configured for the terminal;
the receiver is used for receiving beam information of alternative analog beams fed back by the terminal, wherein the alternative analog beams are determined by the terminal by selecting at least one analog beam from the analog beams according to the received power of the reference signal and according to the selected at least one analog beam;
if the uplink and downlink channels of the system have reciprocity, receiving and detecting an SRS on the alternative analog beams to obtain uplink channel information, estimating the downlink channel information by utilizing the channel reciprocity, and calculating the optimal digital beam forming according to the downlink channel information so as to obtain the digital beam forming vector of each alternative analog beam and obtain the mixed beam forming gain;
if the uplink and downlink channels of the system have no reciprocity, after receiving the beam information of the alternative analog beam fed back by the terminal, receiving the beam information of the mixed beam sent by the terminal, including: transmitting CSI-RS information to the terminal according to the received beam information of the alternative analog beam; receiving beam information of a mixed beam fed back by a terminal, wherein the mixed beam is downlink channel information obtained by the terminal according to the received CSI-RS; obtaining an optimal digital codebook index corresponding to the alternative analog beam according to the downlink channel information and a pre-configured digital beam codebook set; calculating the mixed beam forming gain according to the downlink channel information and the optimal digital codebook index corresponding to the alternative analog beam; and combining the analog beam with the strongest hybrid beam forming gain and the digital beam.
23. A network-side device, comprising:
a transmitting module, configured to transmit a reference signal to a terminal on a plurality of analog beams configured for the terminal;
a receiving module, configured to receive beam information of an alternative analog beam fed back by a terminal, where the alternative analog beam is determined by the terminal according to at least one selected analog beam among the multiple analog beams according to the received power of the reference signal;
if the uplink and downlink channels of the system have reciprocity, receiving and detecting an SRS on the alternative analog beams to obtain uplink channel information, estimating the downlink channel information by utilizing the channel reciprocity, and calculating the optimal digital beam forming according to the downlink channel information so as to obtain the digital beam forming vector of each alternative analog beam and obtain the mixed beam forming gain;
if the uplink and downlink channels of the system have no reciprocity, after receiving the beam information of the alternative analog beam fed back by the terminal, receiving the beam information of the mixed beam sent by the terminal, including: transmitting CSI-RS information to the terminal according to the received beam information of the alternative analog beam; receiving beam information of a mixed beam fed back by a terminal, wherein the mixed beam is downlink channel information obtained by the terminal according to the received CSI-RS; obtaining an optimal digital codebook index corresponding to the alternative analog beam according to the downlink channel information and a pre-configured digital beam codebook set; calculating the mixed beam forming gain according to the downlink channel information and the optimal digital codebook index corresponding to the alternative analog beam; and combining the analog beam with the strongest hybrid beam forming gain and the digital beam.
24. A network-side device, comprising: a processor, a memory storing a computer program which, when executed by the processor, performs the method of any one of claims 8-12.
25. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 8-12.
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