CN110620604A - Beam allocation method, device, base station and computer readable storage medium - Google Patents

Beam allocation method, device, base station and computer readable storage medium Download PDF

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Publication number
CN110620604A
CN110620604A CN201810632040.6A CN201810632040A CN110620604A CN 110620604 A CN110620604 A CN 110620604A CN 201810632040 A CN201810632040 A CN 201810632040A CN 110620604 A CN110620604 A CN 110620604A
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Prior art keywords
synthesized
beams
energy
ratio
determining
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Inventor
周娜
周将运
刘汉超
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ZTE Corp
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ZTE Corp
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Priority to CN201810632040.6A priority Critical patent/CN110620604A/en
Priority to PCT/CN2019/090650 priority patent/WO2019242524A1/en
Publication of CN110620604A publication Critical patent/CN110620604A/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
    • H04B7/0413—MIMO systems
    • 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
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Abstract

The embodiment of the invention provides a beam distribution method, a beam distribution device, a base station and a computer readable storage medium, wherein the energy projection ratio of each synthesized beam is determined by at least two preset synthesized beams; at least one synthesized beam meeting the activation threshold is selected from the synthesized beams as an activation beam and is distributed to the user terminal, so that a plurality of synthesized beams are formed by respectively synthesizing each single beam in advance, and then the energy projection ratio of the synthesized beams is directly calculated, thereby improving the accuracy of beam activation and further improving the downlink flow of the cell.

Description

Beam allocation method, device, base station and computer readable storage medium
Technical Field
Embodiments of the present invention relate to the field of communications, and in particular, to a method, an apparatus, a base station, and a computer-readable storage medium for beam allocation.
Background
In a Massive MIMO (Multiple-Input Multiple-Output) system, a cell is divided into a plurality of prefabricated beams to cover, an activated beam is selected for a terminal according to a certain strategy, and a base station sends data to the terminal through the activated beam.
Disclosure of Invention
The embodiment of the invention provides a beam allocation method, a beam allocation device, a base station and a computer readable storage medium, and aims to at least solve the problem of inaccurate beam activation in the related art.
In order to solve the above technical problem, an embodiment of the present invention provides a beam allocation method, including:
determining the energy projection ratio of each preset at least two synthesized beams;
and selecting at least one synthesized beam meeting the activation threshold from the synthesized beams as an activated beam and distributing the activated beam to the user terminal.
An embodiment of the present invention further provides a beam allocation apparatus, including:
the projection determination module is used for determining the energy projection ratio of each preset at least two synthesized beams;
and the beam activation module is used for selecting at least one synthesized beam meeting the activation threshold from the synthesized beams as an activated beam and distributing the activated beam to the user terminal.
The embodiment of the invention also provides a base station, which comprises a processor, a memory and a communication bus;
the communication bus is used for realizing connection communication between the processor and the memory;
the processor is configured to execute a computer program stored in the memory to implement the steps of the beam allocation method described above.
Embodiments of the present invention also provide a computer-readable storage medium, in which one or more computer programs are stored, and the computer programs can be executed by one or more processors to implement the steps of the beam allocation method described above.
The embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides a beam distribution method, a beam distribution device, a base station and a computer readable storage medium, wherein the energy projection ratio of each synthesized beam is determined by at least two preset synthesized beams; at least one synthesized beam meeting the activation threshold is selected from the synthesized beams as an activated beam and is distributed to the user terminal, so that at least two synthesized beams are formed by respectively synthesizing each single beam in advance, and then the energy projection ratio of the at least two synthesized beams is directly calculated, thereby improving the accuracy of beam activation and further improving the downlink flow of the cell.
In addition, the embodiment of the invention also determines the inner ring MCS break according to the synthesized beam, improves the accuracy of the inner ring MCS break calculation, and further improves the downlink flow of the cell.
Additional features and corresponding advantages of embodiments of the invention are set forth in the description that follows, and it is to be understood that at least some of the advantages will be apparent from the description of the invention herein.
Drawings
FIG. 1 is a schematic diagram of a Massive MIMO system base station;
fig. 2 is a flowchart of a beam allocation method according to a first embodiment of the present invention;
fig. 3 is a flowchart of a beam allocation method according to a second embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a beam distribution apparatus according to a fourth embodiment of the present invention;
fig. 5 is a schematic diagram of a base station according to a fifth embodiment of the present invention.
Detailed Description
In a Massive MIMO system, please refer to fig. 1, which mainly includes two hardware components, namely a PHY (Physical Layer) module and a CMAC (Media Access Control sublayer) module. PHY refers to the physical layer, the bottom layer of LTE (Long Term Evolution, fourth generation mobile phone mobile communication standard, commonly known as 4G), and generally refers to a chip for interfacing with external signals. CMAC refers to the medium access control sublayer. In the existing Massive MIMO system, a PHY module reports beam energy, a CMAC module carries out beam activation and breakage of an inner ring MCS according to the reported beam energy, an activation result is issued to the PHY, and the PHY synthesizes a beam according to the activation result and carries out communication to UE (user equipment), namely, the PHY activates and synthesizes the beam. This may result in inaccurate activation of the beam and inaccurate inner loop translation, which affects the downlink traffic of the cell. In each embodiment of the present invention, the PHY module is responsible for reporting the beam, and reports the beam energy ratio of each synthesized beam synthesized by SRS (Sounding reference signal) to the CMAC module; and the CMAC module activates the beam and converts the inner-loop MCS according to the beam energy ratio of the synthesized beam reported by the PHY module. And then the synthesized beam index is sent to the PHY, so that the beam energy finally synthesized by the PHY is the energy which is used by the active beam and the inner-ring MCS in a depreciation way.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
First embodiment
Referring to fig. 2, fig. 2 is a flowchart of a beam allocation method according to a first embodiment of the present invention, including:
s201, determining the energy projection ratio of each preset at least two synthesized beams;
and S202, selecting at least one synthesized beam meeting the activation threshold from the synthesized beams as an activation beam, and distributing the activation beam to the user terminal.
In some embodiments, determining the energy projection ratio of each of the at least two preset synthetic beams may include:
determining the energy projection of each synthesized beam according to the covariance matrixes of the two polarization directions of the two vertical plates of the antenna and the weight of each synthesized beam; and determining the percentage of the energy projection of each synthesized beam relative to the cell-specific reference signal CRS broadcast weight to obtain the energy projection ratio of each synthesized beam. Therein, the antenna usually comprises two antennas, each antenna having two polarization directions, i.e. two pairs of polarization direction covariance matrices. Assuming that there are 255 synthesized beams in the embodiment, there are 255 synthesized beams with weights WCRS＝[w0,w1,....w255]Where w255 is the complementary value, filling the last bit of the covariance matrix. The 255 synthesized beam weights are arranged from small to large (1-8) according to the number of the synthesized single beams.
In each embodiment of the present invention, only 255 synthetic beams are listed, and there is no limitation that the number of the synthetic beams is 255, and the corresponding design may be performed according to an actual system, or may be less than 255, or more than 255, and the embodiment of the present invention does not limit the same.
In some embodiments, determining the energy projection of each synthesized beam according to the covariance matrices of the two polarization directions of the antenna perpendicular to the two panels and the weight of each synthesized beam may include:
extracting covariance matrices of two polarization directions according to two vertical antenna platesAndwherein the content of the first and second substances,
n＝0,1；andrepresenting the covariance matrices on the two antennas, respectively, each comprising two polarization-wise covariance matrices, i.e. in practice four covariance matrices, respectivelyAnd
combining the extracted covariance matrixes to obtain an average value to obtain an average covariance matrixThe average here is an arithmetic average.
Calculating the energy projection of each beam according to the average covariance matrix and the weight of each synthesized beamWherein M isCRS-1 is the number of the largest synthesized beam, in this embodiment 255. The energy projection of each beam is calculated, and then the energy projection ratio of each synthesized beam can be obtained according to the percentage of the energy projection of the 255 synthesized beams relative to the broadcast weight of the CRS (Cell-specific Reference Signal), and the specific algorithm is as follows:after the energy projection ratio is obtained, the PHY module may report the energy projection ratio to the CMAC module.
In some embodiments, selecting, from among the synthesized beams, at least one synthesized beam that satisfies the activation threshold as the activation beam may include: determining a synthetic beam satisfying an activation threshold from among the synthetic beams; and selecting the synthetic beam with the minimum beam number as the active beam from the synthetic beams meeting the active threshold. The activation threshold is a limit value of the energy projection size of the synthesized beam, which is generally compared with the maximum energy in the synthesized beam, that is, the 255 th synthesized beam is obtained by synthesizing all the single beams, the energy value of the synthesized beam is also the highest, the activation threshold represents a certain ratio of the maximum energy value, for example, 85%, and when the energy projection size is greater than or equal to 85%, the synthesized beam can be considered to satisfy the activation threshold and can be activated.
However, not all the synthesized beams need to be activated when meeting the activation threshold, and based on the consideration of resource utilization, the lower the number of single beams occupied by the synthesized beams is, the higher the efficiency is on the premise of meeting the activation threshold requirement. For example, there are 8 groups of synthesized beams satisfying the activation threshold, where the number of single beams included in each group is 3, 4,5,6, 7, and 8, and the synthesized beam including a single beam is preferably the activation beam.
In addition, in some embodiments, selecting the synthetic beam with the smallest number of beams as the active beam may further include: when the synthesized beam with the smallest number of beams includes at least two, the synthesized beam with the highest energy projection ratio is selected as the active beam. The synthesized beam with the minimum beam number may also be multiple, and when there are multiple synthesized beams, because the number of beams is the same, the synthesized beam with the highest energy projection ratio can be activated as the activated beam from the energy size perspective, so that the communication quality can be ensured as much as possible.
In some embodiments, it may further include:
obtaining the SINR value of the width filtering signal and interference plus noise ratio under the current transmission scheme of the user terminal as the SINRCQI(ii) a Energy ratio according to each synthesized beam, and SINRCQIWithin, determineThe loop modulation is MCS-lossy from the coding strategy.
Specifically, the energy ratio and SINR of each synthesized beamCQIDetermining the inner loop modulation and coding strategy MCS impairments may comprise:
calculating a signal power Ps ═ Pall _ UE (ActSet _ inx) according to the projected energy ratio of each synthesized beam; wherein, Pall _ UE is the energy ratio of each synthesized beam; the AckSet _ inx is a bitmap index corresponding to an activated beam of the user terminal;
calculating space division multiplexing interference I according to projection energy ratio of each synthesized beamSDMAAnd channel mismatch penalty IChanLoss(ii) a Wherein, ISDMA＝∑k∈UeSetPall_UE(SdmaSetkInx) where UeSet is a paired terminal space-division paired with a user terminal, SdmaSetkInx is the bitmap index corresponding to the activated beam of each paired terminal; i isChanLoss-Pall _ UE (AckSet _ inx), where end is the bitmap index corresponding to the largest synthesized beam;
acquisition of null capability loss through home horizontal and home vertical beams of a user terminal
According to space division multiplexing interference ISDMAChannel mismatch loss IChanLossAnd loss of nulling capabilityConversion calculationWherein α and β are each a configurable parameter;
through SINR'pairResulting in an inner loop MCS penalty. The calculated inner ring MCS is more accurate in loss, and therefore the downlink flow of the cell can be further improved.
In this embodiment, the SRS synthesized beam scheme is used to replace a single beam summation scheme in the prior art, that is, the PHY module directly reports the energy ratio of 255 beams synthesized by the SRS, and the CMAC module activates the beams and converts the inner loop MCS according to the energy ratio of the 255 beams reported by the PHY module. Therefore, the wave beam energy finally synthesized is used for wave beam activation and inner loop conversion, compared with the original single wave beam summation scheme, the new scheme is firstly synthesized and then activated, and is more accurate and real, so that the space division multiplexing performance is improved, and the downlink flow of a cell is improved.
Second embodiment
Referring to fig. 3, fig. 3 is a flowchart of a beam allocation method according to a second embodiment of the present invention, including:
s301, calculating the energy projection ratio
(1) Presetting a beam:
presetting 255 synthesized beam weights WCRS＝[w0,w1,....w255]The 255 synthetic beams are arranged from small to large (1-8) according to the number of the beams;
(2) and (3) extraction of covariance matrixes:
extracting covariance matrices of two polarization directions according to two vertical antenna platesAndnamely:
merging and averaging:
the extracted results are combined and averaged,
and calculating the energy projection by using the combined and averaged covariance matrix and the 255 synthesized beam weights.
(4) Beam energy projection
(5) Energy projection fraction calculation
The percentage of the energy projection of the 255 synthetic beams relative to the CRS (Cell-specific Reference Signal) broadcast weight is calculated, respectively, and the energy projection ratio is reported to the CMAC. The calculation method is described as follows:
m＝0,1,2,...MCRS-1
in the formula MCRS-1 equals 255.
S302, generating an active beam
(1) The PHY reports the projection energy ratio of the 255 active beam bitmaps to the CMAC;
(2) according to a synthesized beam projection energy ratio table reported by a PHY (physical layer), the CMAC finds out a synthesized beam set An which has the minimum number of activated beams and meets An activation threshold according to the sequence of the number of the activated beams from small to large;
(3) and finding out the synthesized beam combination with the highest energy ratio of the activated beams from An as the activated beams.
S303, inner ring MCS breaking
In this embodiment, Pall _ UE represents 255 energy ratios reported by the current UE.
(1) Acquiring the value of the broadband filtering SINR of the user u under the current transmission scheme as the SINRCQI(linear value);
(2) calculating the signal power Ps ═ Pall _ UE (ActSet _ inx); wherein, the ActSet _ inx is a bitmap index corresponding to the activated beam set of the user u.
(3) Calculating space division multiplexing interference ISDMA＝∑k∈UeSetPall_UE(SdmaSetkInx); the UeSet is UE space-division paired with user u, and the SdmaSetk _ inx is bitmap index corresponding to the active beam set of user k.
(4) ComputingChannel mismatch penalty IChannLossPall _ UE (end) -Pall _ UE (AckSet _ inx); where end is 255.
(5) Acquisition of null capacity loss by user u's home horizontal beam and home vertical beam look-up table
(6) Converted inner ring SINR'pair：
Wherein, alpha is a configurable parameter, and beta is a configurable parameter.
(7) Through SINR'pairMapping CQI, mapping CQI to obtain corresponding SE, and mapping SE to obtain inner loop MCS.
Third embodiment
The present embodiment provides a specific application of the beam allocation method, wherein it is assumed that the energy ratio of the active beam of the single beam summation method exceeds the active threshold, and the detection of the synthesized beam method does not reach the threshold.
The parameter configuration is shown in the following table:
synthetic beam function switch Open
Active beam energy ratio 85％
Whether beam overlap can be spatially separated Whether or not
1. Cell1 has 4 UEs distributed near, middle and far for downlink space division, which are UE 0-UE 3.
2. The energy fraction of the synthetic beam method of the remote UE3 is obtained and compared to the energy fraction of the single beam summation method. Through the beam allocation methods in the above embodiments, it can be measured that the energy ratio of the synthesized beam is lower than the sum energy ratio of the single beam for the same UE3 at the same far point position, the energy ratio of the sum method of the single beam has reached a threshold of 85%, all the beams of the UE3 are activated, the UE3 that is not matched with the space division should be matched with the other UEs, the inter-stream interference is severe, and the space division multiplexing performance of the cell is affected. And the energy ratio of the method for synthesizing beams does not reach the threshold of 85%, the beams of the UE3 are not activated, and it can be found through the step two that more beams need to be selected for activation to reach the activation threshold. However, the more the active beams, the greater the probability of overlapping beams with other UEs, and because the UEs with the beams overlapping cannot be space-divided, the probability of space-division pairing becomes smaller, the inter-stream interference is also reduced, the space-division multiplexing performance of the cell is improved, and the downlink traffic of the cell is improved.
Assume that the single beam summation method active beam energy ratio does not meet the activation threshold, while the composite beam method detects that the threshold has been exceeded.
The parameter configuration is shown in the following table:
synthetic beam function switch Open
Active beam energy ratio 85％
Whether beam overlap can be spatially separated Whether or not
1. Cell1 has 4 UEs distributed near, middle and far for downlink space division, which are UE 0-UE 3.
2. The energy fraction of the synthetic beam method for the acquisition midpoint UE2 is compared to the energy fraction of the single beam summation method. The beam allocation method in the above embodiments may measure that the same UE2, at the same midpoint position, the energy ratio of the synthesized beam is higher than the energy ratio of the sum of single beams, and the energy ratio of the sum of single beams does not reach the threshold of 85%, and none of the beams of the UE may be activated. Then the more active beams, the higher the probability of beam overlap with other UEs (the UEs with overlapping beams cannot be space-divided), so the probability of space-division pairing becomes smaller, and the UE2 should be paired with space division, but not paired with other UEs to be space-divided, which affects the space-division multiplexing performance of the cell. The energy ratio of the beam synthesis method reaches a threshold of 85%, the beams of the UE2 are activated and can be matched with other UEs for space division, the space division multiplexing performance of the cell is improved, and the downlink flow of the cell is improved.
The synthetic beam method can make the MCS internal ring loss more accurate, and the cell downlink flow is improved
The parameter configuration is shown in the following table:
synthetic beam function switch Open
Active beam energy ratio 85％
Whether beam overlap can be spatially separated Whether or not
1. Cell1 has 3 UEs distributed near, middle and far for downlink space division, which are UE 0-UE 2.
2. The beam allocation method in the above embodiments can obtain:
the UE1 activates beam 0,1, the corresponding energy projection is [ 11000000 ];
the paired UE2 activates beams 2,3, and the corresponding energy projection is [ 00110000 ];
the paired UE3 activates beams 4,5,6, with a corresponding energy projection of [ 00001110 ]; where 0 denotes an inactive single beam and 1 denotes an active single beam.
The single beam summation method comprises the following steps:
reporting 16 projection energies of the UE1, 2D combining 8 projection energies,representing the projected energy of the user UE1 in beam i, i ═ 0: 7.
The beam synthesis method can obtain the following steps:
and reporting 255 projection energies Pall _ UE of the UE 1.
bin2dec('11000000')＝192,
bin2dec('00110000')＝48,bin2dec('00001110')＝14
bin2dec('11111111')＝255
Signal power Ps＝Pall_UE(192)
Space division multiplexing interference ISDMA＝Pall_UE(48)+Pall_UE(14)
Channel mismatch penalty IChannLoss＝Pall_UE(255)-Pall_UE(192)
3. The inner ring folding loss information of the midpoint UE2 is obtained by the beam allocation method in each embodiment, the inner ring folding loss of the synthesized beam is smaller than that of the single beam summation method, the inner ring MCS finally scheduled by the synthesized beam method UE2 is 5, the inner ring MCS finally scheduled by the single beam summation method is 1 or 2, and the inner ring MCS finally scheduled is raised, so that the space division multiplexing performance of the cell is improved, and the downlink traffic of the cell is improved.
Fourth embodiment
Referring to fig. 4, fig. 4 is a schematic diagram illustrating a beam distribution apparatus provided in this embodiment, including:
a projection determining module 41, configured to determine an energy projection ratio of each of at least two preset synthetic beams;
and a beam activation module 42, configured to select at least one synthesized beam satisfying an activation threshold from the synthesized beams as an activated beam, and allocate the activated beam to the user terminal.
In some embodiments, determining the energy projection ratio of each of the at least two preset synthetic beams may include:
determining the energy projection of each synthesized beam according to the covariance matrixes of the two polarization directions of the two vertical plates of the antenna and the weight of each synthesized beam; and determining the percentage of the energy projection of each synthesized beam relative to the cell-specific reference signal CRS broadcast weight to obtain the energy projection ratio of each synthesized beam. Therein, the antenna usually comprises two antennas, each antenna having two polarization directions, i.e. two pairs of polarization direction covariance matrices. Assuming that there are 255 synthesized beams in the embodiment, there are 255 synthesized beams with weights WCRS＝[w0,w1,....w255]Where w255 is the complementary value, filling the last bit of the covariance matrix. The 255 synthesized beam weights are arranged from small to large (1-8) according to the number of the synthesized single beams.
In each embodiment of the present invention, only 255 synthetic beams are listed, and there is no limitation that the number of the synthetic beams is 255, and the corresponding design may be performed according to an actual system, or may be less than 255, or more than 255, and the embodiment of the present invention does not limit the same.
In some embodiments, determining the energy projection of each synthesized beam according to the covariance matrices of the two polarization directions of the antenna perpendicular to the two panels and the weight of each synthesized beam may include:
extracting covariance matrices of two polarization directions according to two vertical antenna platesAndwherein the content of the first and second substances,
n＝0,1；andrepresenting the covariance matrices on the two antennas, respectively, each comprising two polarization-wise covariance matrices, i.e. in practice four covariance matrices, respectivelyAnd
combining the extracted covariance matrixes to obtain an average value to obtain an average covariance matrixThe average here is an arithmetic average.
Calculating the energy projection of each beam according to the average covariance matrix and the weight of each synthesized beamWherein M isCRS-1 is the number of the largest synthesized beam, in this embodiment 255. The energy projection of each beam is calculated, and then the energy projection ratio of each synthesized beam can be obtained according to the percentage of the energy projection of the 255 synthesized beams relative to the broadcast weight of the CRS (Cell-specific Reference Signal), and the specific algorithm is as follows:after the energy projection ratio is obtained, the PHY module may report the energy projection ratio to the CMAC module.
In some embodiments, selecting, from among the synthesized beams, at least one synthesized beam that satisfies the activation threshold as the activation beam may include: determining a synthetic beam satisfying an activation threshold from among the synthetic beams; and selecting the synthetic beam with the minimum beam number as the active beam from the synthetic beams meeting the active threshold. The activation threshold is a limit value of the energy projection size of the synthesized beam, which is generally compared with the maximum energy in the synthesized beam, that is, the 255 th synthesized beam is obtained by synthesizing all the single beams, the energy value of the synthesized beam is also the highest, the activation threshold represents a certain ratio of the maximum energy value, for example, 85%, and when the energy projection size is greater than or equal to 85%, the synthesized beam can be considered to satisfy the activation threshold and can be activated.
However, not all the synthesized beams need to be activated when meeting the activation threshold, and based on the consideration of resource utilization, the lower the number of single beams occupied by the synthesized beams is, the higher the efficiency is on the premise of meeting the activation threshold requirement. For example, there are 8 groups of synthesized beams satisfying the activation threshold, where the number of single beams included in each group is 3, 4,5,6, 7, and 8, and the synthesized beam including a single beam is preferably the activation beam.
In addition, in some embodiments, selecting the synthetic beam with the smallest number of beams as the active beam may further include: when the synthesized beam with the smallest number of beams includes at least two, the synthesized beam with the highest energy projection ratio is selected as the active beam. The synthesized beam with the minimum beam number may also be multiple, and when there are multiple synthesized beams, because the number of beams is the same, the synthesized beam with the highest energy projection ratio can be activated as the activated beam from the energy size perspective, so that the communication quality can be ensured as much as possible.
In some embodiments, an inner loop MCS determination module 43 may be further included for:
obtaining the SINR value of the width filtering signal and interference plus noise ratio under the current transmission scheme of the user terminal as the SINRCQI(ii) a Energy ratio according to each synthesized beam, and SINRCQIAnd determining the MCS depreciation of the inner ring modulation and coding strategy.
Specifically, the energy ratio and SINR of each synthesized beamCQIDetermining the inner loop modulation and coding strategy MCS impairments may comprise:
calculating a signal power Ps ═ Pall _ UE (ActSet _ inx) according to the projected energy ratio of each synthesized beam; wherein, Pall _ UE is the energy ratio of each synthesized beam; the AckSet _ inx is a bitmap index corresponding to an activated beam of the user terminal;
calculating space division multiplexing interference I according to projection energy ratio of each synthesized beamSDMAAnd channel mismatch penalty IChanLoss(ii) a Wherein, ISDMA＝∑k∈UeSetPall_UE(SdmaSetkInx) where UeSet is a paired terminal space-division paired with a user terminal, SdmaSetkInx is bit corresponding to the active beam of each paired terminalmap index; i isChanLoss-Pall _ UE (AckSet _ inx), where end is the bitmap index corresponding to the largest synthesized beam;
acquisition of null capability loss through home horizontal and home vertical beams of a user terminal
According to space division multiplexing interference ISDMAChannel mismatch loss IChanLossAnd loss of nulling capabilityConversion calculationWherein α and β are each a configurable parameter;
through SINR'pairResulting in an inner loop MCS penalty. The calculated inner ring MCS is more accurate in loss, and therefore the downlink flow of the cell can be further improved.
In this embodiment, the SRS synthesized beam scheme is used to replace a single beam summation scheme in the prior art, that is, the PHY module directly reports the energy ratio of 255 beams synthesized by the SRS, and the CMAC module activates the beams and converts the inner loop MCS according to the energy ratio of the 255 beams reported by the PHY module. Therefore, the wave beam energy finally synthesized is used for wave beam activation and inner loop conversion, compared with the original single wave beam summation scheme, the new scheme is firstly synthesized and then activated, and is more accurate and real, so that the space division multiplexing performance is improved, and the downlink flow of a cell is improved.
Fifth embodiment
Referring to fig. 5, fig. 5 is a schematic diagram of a base station according to the present embodiment, including a processor 51, a memory 52 and a communication bus 53;
the communication bus 53 is used for realizing connection communication between the processor 51 and the memory 52;
the processor 51 is configured to execute a computer program stored in the memory 52 to implement the procedures of the beam allocation methods in the foregoing embodiments of the present invention, which are not described herein again.
Sixth embodiment
The present embodiment provides a computer-readable storage medium, where one or more computer programs are stored in the computer-readable storage medium, and the computer programs may be executed by one or more processors to implement the beam allocation methods in the foregoing embodiments, which are not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the invention described above may be implemented in a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented in program code executable by a computing device, such that they may be stored on a storage medium (ROM/RAM, magnetic disk, optical disk) and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (12)

1. A method of beam allocation, comprising:
determining the energy projection ratio of each preset at least two synthesized beams;
and selecting at least one synthesized beam meeting the activation threshold from the synthesized beams as an activated beam and distributing the activated beam to the user terminal.
2. The method of claim 1, wherein the determining the energy projection ratio of each of the at least two predetermined composite beams comprises:
determining the energy projection of each synthesized beam according to the covariance matrixes of the two polarization directions of the two vertical plates of the antenna and the weight of each synthesized beam;
and determining the percentage of the energy projection of each synthesized beam relative to the cell-specific reference signal CRS broadcast weight to obtain the energy projection ratio of each synthesized beam.
3. The method of claim 2, wherein the determining the energy projection of each of the synthesized beams according to the covariance matrices of the two polarization directions of the antenna perpendicular to the two panels and the weight of each synthesized beam comprises:
extracting covariance matrices of two polarization directions according to two vertical antenna platesAndwherein the content of the first and second substances,
merging the extracted covariance matrixes to obtain an average value to obtain an average covariance matrix
Calculating the energy projection of each beam according to the average covariance matrix and the weight of each synthesized beam
4. The beam allocation method according to any one of claims 1-3, wherein said selecting at least one of the synthesized beams that satisfies an activation threshold as an active beam comprises:
determining a synthetic beam satisfying an activation threshold from among the synthetic beams;
and selecting the synthetic beam with the minimum beam number as the active beam from the synthetic beams meeting the activation threshold.
5. The method of claim 4, wherein the selecting the synthetic beam with the smallest number of beams as the active beam from the synthetic beams satisfying the active threshold comprises:
when the synthesized beam with the minimum number of beams includes at least two beams, the synthesized beam with the highest energy projection ratio is selected as the active beam.
6. The beam allocation method of any one of claims 1-3, further comprising:
obtaining the SINR value of the width filtering signal and interference plus noise ratio under the current transmission scheme of the user terminal as the SINRCQI；
According to the energy ratio of each synthesized beam and the SINRCQIAnd determining the MCS depreciation of the inner ring modulation and coding strategy.
7. The method of claim 6, wherein the energy ratio is determined according to each of the synthesized beams and the SINRCQIDetermining the inner loop modulation and coding strategy MCS impairment comprises:
calculating a signal power Ps ═ Pall _ UE (ActSet _ inx) according to a projected energy ratio of each of the synthesized beams; wherein, the Pall _ UE is an energy ratio of each synthesized beam; the AckSet _ inx is a bitmap index corresponding to an activated beam of the user terminal;
calculating space division multiplexing interference I according to the projection energy ratio of the synthesized beamsSDMAAnd channel mismatch penalty IChanLoss(ii) a Wherein, ISDMA＝∑k∈UeSetPall_UE(SdmaSetkInx) where UeSet is a paired terminal space-division paired with a user terminal, SdmaSetkInx is the bitmap index corresponding to the activated beam of each paired terminal; i isChanLoss-Pall _ UE (AckSet _ inx), where end is the bitmap index corresponding to the largest synthesized beam;
acquisition of null capability loss through home horizontal and home vertical beams of a user terminal
According to the space division multiplexing interference ISDMAChannel mismatch loss IChanLossAnd the loss of nulling capabilityConversion calculationWherein α and β are each a configurable parameter;
through SINR'pairResulting in an inner loop MCS penalty.
8. A method for beam allocation according to any of claims 1-3, wherein the number of synthesized beams is 255.
9. A beam allocation apparatus comprising:
the projection determination module is used for determining the energy projection ratio of each preset at least two synthesized beams;
and the beam activation module is used for selecting at least one synthesized beam meeting the activation threshold from the synthesized beams as an activated beam and distributing the activated beam to the user terminal.
10. The beam allocating apparatus as claimed in claim 9, further comprising an inner-loop MCS determining module, configured to obtain a SINR value SINRCQI of a width-filtered signal-to-interference-plus-noise ratio in a current transmission scheme of the user terminal, and determine an inner-loop modulation and coding scheme MCS according to an energy ratio of each of the synthesized beams and the SINR value.
11. A base station comprising a processor, a memory and a communication bus;
the communication bus is used for realizing connection communication between the processor and the memory;
the processor is adapted to execute a computer program stored in the memory to implement the steps of the beam allocation method according to any of claims 1-8.
12. A computer-readable storage medium, having one or more computer programs stored thereon, the computer programs being executable by one or more processors to perform the steps of the beam allocation method according to any one of claims 1-8.
CN201810632040.6A 2018-06-19 2018-06-19 Beam allocation method, device, base station and computer readable storage medium Withdrawn CN110620604A (en)

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