CN108207026B - Method and apparatus for determining DOA information of serving UE - Google Patents

Method and apparatus for determining DOA information of serving UE Download PDF

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Publication number
CN108207026B
CN108207026B CN201611170641.7A CN201611170641A CN108207026B CN 108207026 B CN108207026 B CN 108207026B CN 201611170641 A CN201611170641 A CN 201611170641A CN 108207026 B CN108207026 B CN 108207026B
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doa
information
doa information
ues
base station
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CN108207026A (en
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吕星哉
赵松峄
张鹏杰
蒋智宁
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Nokia Shanghai Bell Co Ltd
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Nokia Shanghai Bell Co Ltd
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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
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/04—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/0009—Transmission of position information to remote stations
    • G01S5/0081—Transmission between base stations
    • 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
    • H04B7/0452—Multi-user MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/74—Multi-channel systems specially adapted for direction-finding, i.e. having a single antenna system capable of giving simultaneous indications of the directions of different signals

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

According to an aspect of the present invention, there is provided a method for determining DOA information of a serving UE in a base station, the method comprising the steps of: receiving a plurality of candidate DOA information from one or more adjacent base stations, wherein the candidate DOA information comprises DOA information obtained by the adjacent base stations through DOA detection; and determining the real DOA information of the service UE in the DOA information obtained by performing DOA detection by the UE based on the candidate DOA information. The invention has the following advantages: the base station determines the real DOA of the self-service UE based on the DOA information from other adjacent base stations, so as to eliminate the transmission interference to other UEs when the beamforming operation is executed; in addition, the scheme of the invention has lower calculation complexity and smaller interactive expense among the base stations.

Description

Method and apparatus for determining DOA information of serving UE
Technical Field
The present invention relates to the field of computer technologies, and in particular, to a method and an apparatus for determining DOA information of a serving UE in a base station.
Background
Multi-cell interference is an important factor limiting wireless network throughput and capacity improvement. In addition, both analog beamforming and digital beamforming are key technologies for improving signal strength in a 5G system. It is therefore very promising to develop a next generation wireless communication system capable of avoiding interference based on multi-cell beamforming technology.
Direction of arrival (DOA) -based Cooperative Beamforming (CBF) is an effective and low-complexity solution for multi-cell interference. The base station obtains the characteristics of the downlink channel by utilizing the mutual difference of wireless channels in the time division duplex system. It can obtain DOA information from an uplink Sounding Reference Signal (SRS), and accordingly eliminate a transmission Signal pointing to the direction, so as to eliminate transmission interference to the UE.
This scheme may work well in environments where the wireless environment is low or medium spatial dispersion. Since DOA information changes slowly, this scheme does not require very strong backhaul like in other interference avoidance, and is thus easy to deploy. And in the target serving cell, the interference DOA information can be easily transformed into a precoding matrix.
However, in order to obtain an accurate DOA, the antenna array at the base station side must have a good angular resolution, for example, the spacing between different antenna elements is 0.5 wavelength, which can support accurate sampling of spatial channel information. Unfortunately, this ideal spacing is difficult to maintain in real-world scenarios, since the wavelength is related to the carrier frequency, and the same antenna system will deploy new or multiple carrier frequencies. For example, in current china mobile networks, the typical and widely deployed LTE TDD frequency is 2.6GHz, which corresponds to an antenna element spacing of 0.65 wavelength.
With 0.65 wavelength (λ) spaced antenna arrays, the base station cannot determine the orientation from the SRS signal because the spatial channels are undersampled and false power peaks appear in the angular profile calculated by the receiving end. Fig. 1 shows a schematic diagram of the calculated beam angle distribution of a 0.65 wavelength spaced antenna array with a beam arrival direction of 45 degrees.
It can be seen that there is a "false" peak at minus 45 degrees. In this case, the base station cannot determine the location of the UE. Without the position information, the base station cannot use any effective DOA-based CBF method to cancel transmission interference to other UEs and thereby improve throughput.
Disclosure of Invention
The invention aims to provide a method and a device for determining DOA information of a serving UE in a base station.
According to an aspect of the present invention, a method for determining DOA information of a serving UE in a base station is provided, wherein the base station obtains the DOA information of the serving UE by performing DOA detection on the serving UE, and the DOA information includes the DOA information of the serving UE and DOA information of other UEs, the method includes the following steps:
a, receiving a plurality of candidate DOA information from one or a plurality of adjacent base stations, wherein the candidate DOA information comprises DOA information obtained by the adjacent base stations through DOA detection;
and b, determining the real DOA information of the service UE in the DOA information obtained by performing DOA detection by the UE based on the candidate DOA information.
According to an aspect of the present invention, there is provided a direction determining apparatus for determining DOA information of a serving UE in a base station, wherein the base station obtains the DOA information of the serving UE by performing DOA detection on the serving UE, and the DOA information includes the DOA information of the serving UE and DOA information of other UEs, the direction determining apparatus comprising:
the device comprises a receiving device and a sending device, wherein the receiving device is used for receiving a plurality of candidate DOA information from one or a plurality of adjacent base stations, and the candidate DOA information comprises DOA information obtained by the adjacent base stations through DOA detection;
and the determining device is used for determining the real DOA information of the service UE in the DOA information obtained by the DOA detection of the determining device based on the candidate DOA information.
Compared with the prior art, the invention has the following advantages: the base station determines the real DOA of the self-service UE based on the DOA information from other adjacent base stations, so as to eliminate the transmission interference to other UEs when the beamforming operation is executed; in addition, the scheme of the invention has lower calculation complexity and smaller interactive expense among the base stations.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 shows a schematic diagram of beam angle distribution of an exemplary receiving-end antenna array;
FIG. 2 illustrates a flow chart of a method for determining DOA information of a serving UE in a base station according to the present invention;
fig. 3 is a schematic structural diagram of a position determining apparatus for determining DOA information of a serving UE in a base station according to the present invention;
fig. 4a shows a schematic diagram of a performance comparison of an exemplary cooperative beamforming scheme according to the present invention with a real-time zero-forcing cooperative beamforming scheme;
fig. 4b shows a diagram of an exemplary cooperative beamforming scheme versus a no cooperative beamforming scheme according to the present invention.
The same or similar reference numbers in the drawings identify the same or similar elements.
Detailed Description
The present invention is described in further detail below with reference to the attached drawing figures.
Fig. 2 shows a flowchart of a method for determining DOA information of a serving UE in a base station according to the present invention. The method according to the present invention includes step S1 and step S2.
Referring to fig. 1, in step S1, a position determining apparatus receives a plurality of candidate DOA information from one or more neighboring base stations.
The base station firstly obtains DOA information of the service UE by performing DOA detection on the service UE, and the DOA information comprises the DOA information of the service UE and the DOA information of other UEs.
Specifically, the base station performs DOA detection based on the SRS signal. Therein, the base station may employ various estimation algorithms to determine the DOA information of the serving UE, such as the MUSIC algorithm or the ESPRIT algorithm, among others.
And the candidate DOA information comprises DOA information obtained by the adjacent base station through DOA detection.
Next, in step S2, the direction determination device determines the true DOA information of the serving UE from among DOA information obtained by performing DOA detection by itself, based on the candidate DOA information.
According to a preferred embodiment of the present invention, the method comprises step S3 (not shown), and the step S2 comprises step S201 (not shown).
In step S3, the azimuth determining apparatus acquires and stores antenna array orientation information of one or more neighboring base stations.
Wherein the antenna array face (boresight) is used for indicating the orientation of the antenna array of the base station.
In step S201, the direction determination device determines DOA information corresponding to the serving UE and the other UE among DOA information obtained by performing DOA detection by itself, based on antenna array orientation information of itself and a neighboring base station, for a plurality of candidate DOA information from the neighboring base station.
Specifically, the base station calculates DOAs of the neighboring base station and the serving UE based on adding or subtracting each candidate DOA to or from the offset of the antenna array face of the neighboring base station, respectively, and if a certain obtained DOA matches with the DOA itself obtained through DOA detection, the DOA matching with the candidate DOA in the DOA obtained through DOA detection is the true DOA of the serving UE.
According to a first example of the present invention, the position determining means is included in base station node _1, and the spacing between base station node _1 and the antenna array of the adjacent base station is 0.65 wavelength. The azimuth determining apparatus receives the antenna array orientation information from the neighboring base station node _2 and stores the antenna array orientation information boresight _ node2 corresponding to the base station node _2 in step S3.
Then, the direction determination device performs DOA detection based on the SRS signal, and obtains two DOA information DOA _1 and DOA _2 of the serving UE (indicated by UE _ 1) of base station node _ 1.
The position determination device receives two candidate DOA information can _ DOA1 and can _ DOA2 from base station node _2 in step S1. Next, the orientation determining means adds or subtracts each candidate DOA to or from the offset of the antenna array face of the neighboring base station to calculate the DOAs of the neighboring base station and the serving UE in step S201, and determines that the DOA obtained based on can _ DOA1 matches DOA _2 obtained by DOA detection of base station node _1, and then the orientation determining means determines that DOA _2 is the true DOA of UE _ 1.
Preferably, the method according to the present invention comprises step S4 (not shown).
In step S4, the position determining apparatus performs a cooperative beamforming operation based on the determined DOA information respectively corresponding to the serving UE and the other UEs, and cancels the transmission interfaces corresponding to the other UEs, thereby eliminating transmission interference to the other UEs.
Specifically, the position determining means may use a look-up table recording beam position information and derive beamforming matrices corresponding to the positions of the serving UE and the other UEs using DOAs corresponding to the serving UE and the other UEs as leads. For each DOA pair, beams may be searched and designed offline, such that interference from the currently serving UE to other UEs after beamforming operations are performed is nullified.
Continuing with the foregoing first example, the position determining apparatus performs a cooperative beamforming operation based on the true DOA information DOA _2 of UE _1 and DOA information DOA _1 of other UEs, and cancels a transmission interface of a UE corresponding to the DOA _1 direction, thereby eliminating transmission interference to the UE.
Preferably, if there are a plurality of other UEs, the performing means may select one or more of the other UEs; coordinated beamforming operations are then performed based on the DOA information of the selected one or more other UEs to cancel transmission interference to the one or more other UEs.
Wherein the position determining means may choose which UEs to cancel their transmission interference in various ways, for example, only the earliest determined other UEs may be chosen, or other UEs with the strongest signal power may be chosen, etc., and those skilled in the art may choose the appropriate way based on the actual needs and on the trade-off between performance and computational complexity.
Preferably, the method includes step S5 (not shown).
In step S5, the direction determination device sends DOA information obtained by performing DOA detection to one or more neighboring base stations, so that the neighboring base stations can determine the DOA information of the UEs served by the neighboring base stations.
According to the method of the invention, the base station determines the real DOA of the UE serving itself based on the DOA information from other adjacent base stations, thereby cancelling the interfaces of other UEs when performing beamforming operation, and eliminating the transmission interference to other UEs; in addition, the method of the invention has lower calculation complexity and smaller interactive expense among the base stations.
Fig. 3 is a schematic structural diagram illustrating a position determining apparatus for determining DOA information of a serving UE in a base station according to the present invention. The orientation determining apparatus according to the present invention includes a receiving apparatus 1 and a determining apparatus 2.
Referring to fig. 3, the reception apparatus 1 receives a plurality of candidate DOA information from one or more neighboring base stations.
The base station firstly obtains DOA information of the service UE by performing DOA detection on the service UE, and the DOA information comprises the DOA information of the service UE and the DOA information of other UEs.
Specifically, the base station performs DOA detection based on the SRS signal. Therein, the base station may employ various estimation algorithms to determine the DOA information of the serving UE, such as the MUSIC algorithm or the ESPRIT algorithm, among others.
And the candidate DOA information comprises DOA information obtained by the adjacent base station through DOA detection.
Then, the determining device 2 determines the true DOA information of the serving UE in the DOA information obtained by performing the DOA detection by itself based on the candidate DOA information.
According to a preferred embodiment of the invention, the position determining means comprise acquisition means (not shown).
The acquisition means acquires and stores antenna array orientation information of one or more neighboring base stations.
Wherein the antenna array face (boresight) is used for indicating the orientation of the antenna array of the base station.
The determination device 2 determines DOA information corresponding to the serving UE and the other UE among DOA information obtained by performing DOA detection by itself, based on antenna array orientation information of itself and a neighboring base station, for a plurality of candidate DOA information from the neighboring base station.
Specifically, the determination means 2 calculates DOAs of the neighboring base station and the serving UE based on adding or subtracting respective candidate DOAs to offsets of antenna array faces of the neighboring base station, respectively, and if a certain obtained DOA matches with a DOA obtained by DOA detection itself, a DOA matching the candidate DOA among DOAs obtained by DOA detection is a true DOA of the serving UE.
According to a first example of the present invention, the position determining means is included in base station node _1, and the spacing between base station node _1 and the antenna array of the adjacent base station is 0.65 wavelength. The acquisition means receives the antenna array orientation information from the neighboring base station node _2 to store the antenna array orientation information boresight _ node2 corresponding to the base station node _ 2.
Then, the direction determination device performs DOA detection based on the SRS signal, and obtains two DOA information DOA _1 and DOA _2 of the serving UE (indicated by UE _ 1) of base station node _ 1.
The reception apparatus 1 receives two candidate DOA information can _ DOA1 and can _ DOA2 from the base station node _ 2. Then, the determination means 2 calculates DOAs of the neighboring base station and the serving UE by adding or subtracting the respective candidate DOAs to the offsets of the antenna array faces of the neighboring base station, respectively, and determines that DOA obtained based on can _ DOA1 matches DOA _2 obtained by DOA detection by base station node _1, and the orientation determination means determines that DOA _2 is a true DOA of UE _ 1.
Preferably, the position determining apparatus according to the present invention comprises an executing apparatus (not shown).
The execution device executes the cooperative beamforming operation based on the determined DOA information respectively corresponding to the service UE and other UEs, and eliminates the transmission interference to other UEs.
In particular, the performing means may use a look-up table that records beam bearing information and take DOAs corresponding to the serving UE and other UEs as a guide to derive beamforming matrices corresponding to the bearings of the serving UE and other UEs. For each DOA pair, beams may be searched and designed offline, such that interference from the currently serving UE to other UEs after beamforming operations are performed is nullified.
Continuing with the foregoing first example, the position determining apparatus performs a cooperative beamforming operation based on the true DOA information DOA _2 of UE _1 and DOA information DOA _1 of other UEs, and cancels a transmission interface of a UE corresponding to the DOA _1 direction, thereby eliminating transmission interference to the UE.
Preferably, if there are a plurality of other UEs, the position determining means may select one or more of the other UEs; coordinated beamforming operations are then performed based on the DOA information of the selected one or more other UEs to cancel transmission interference to the one or more other UEs.
Wherein the position determining means may choose which UEs to cancel their transmission interference in various ways, for example, only the earliest determined other UEs may be chosen, or other UEs with the strongest signal power may be chosen, etc., and those skilled in the art may choose the appropriate way based on the actual needs and on the trade-off between performance and computational complexity.
Preferably, the position determining means comprises transmitting means (not shown).
The sending device sends DOA information obtained by carrying out DOA detection to one or more adjacent base stations so that the adjacent base stations can determine the DOA information of the UE served by the adjacent base stations.
According to the scheme of the invention, the base station determines the real DOA of the self-service UE based on the DOA information from other adjacent base stations, thereby eliminating the transmission interference to other UEs when the beamforming operation is executed; in addition, the scheme of the invention has lower calculation complexity and smaller interactive expense among the base stations.
Fig. 4a shows a schematic diagram of a performance comparison of an exemplary cooperative beamforming scheme according to the present invention with a real-time zero-forcing cooperative beamforming scheme.
Fig. 4b shows a diagram of an exemplary cooperative beamforming scheme versus a no cooperative beamforming scheme according to the present invention.
The simulation experiment shown in fig. 4a and 4b uses simulation data obtained by using predetermined parameters. Where the traffic model is a full buffer model, this means that the network is fully loaded.
The process of cooperative beamforming may use a zero-forcing based algorithm to derive the codebook offline. The codebook is generated by: firstly, generating a grid A with a beam from 60 degrees to 60 degrees and a granularity of 10 degrees; then, generating two grids B and C which respectively point to two adjacent base stations and have the same granularity, wherein the beam of the grid B ranges from-120 degrees to-60 degrees, and the beam of the grid C ranges from 60 degrees to 180 degrees; next, a zero-forcing algorithm is used to generate CBF weights, where one beam in grid a represents the location of the serving UE and a beam in grid B or grid C represents the location of other UEs interfered by the serving UE.
Wherein the direction vector of the beam may be calculated based on the following equation (1):
Figure BDA0001183402180000081
where d denotes the spacing of the antenna elements, λ denotes the wavelength of the operating carrier frequency, and θ denotes the orientation of the radio waves.
Wherein, the beam set of grid a can be represented as: the beam set of a ═ e (θ) }, θ ═ 60, -50., 60, grid B may be expressed as a beam set of B ═ e (Φ) }, Φ ═ 120, -110., -50, grid C may be expressed as: c ═ e (Φ) }, Φ ═ 70, 80.
For each θ from grid A, and φ from grid B and grid C, the following matrices can be obtained:
Q(θ,φ)＝[a(θ),a(φ)]T
and then, obtaining:
P(θ,φ)＝QH(θ,φ)(Q(θ,φ)QH(θ,φ))-1＝[ω1(θ,φ),ω2(θ,φ)](2)
where P (θ, Φ) represents a beamforming vector for a serving UE located at the azimuth θ, and ω 1(θ, Φ) represents beamforming vectors for other UEs located at the azimuth Φ. And, the [ alpha ]]TIs a transposition operation]HIs a Hermite operation. The vector is incorporated into the codebook. When a base station needs to be in the coverage of serving a UE located at the azimuth θ and cancel transmission interference to other UEs located at Φ, the sum can be used as a query index to obtain a corresponding beamforming vector to apply to data transmission.
Referring to fig. 4a, for Cell Aggregated Throughput (Cell Aggregated Throughput) and Cell Edge Throughput (Cell Edge Throughput), compared with a scheme of implementing a cooperative beamforming vector (Real-time based ZF CBF) by an ideal Real-time zero-forcing algorithm, the DOA-based cooperative beamforming scheme (DOAbased CBF) proposed by the present scheme can achieve similar performance, while the complexity and interaction overhead are much lower.
Referring to fig. 4b, it can be seen that in a fully loaded network, the DOA-based cooperative beamforming scheme proposed by the present invention can obtain a cell edge throughput gain of about 17% while maintaining the same level of cell aggregate throughput compared to the No cooperative beamforming scheme (No CBF case).
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the system claims may also be implemented by one unit or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.

Claims (10)

1. A method for determining DOA information of a serving UE in a base station, wherein the base station obtains the DOA information of the serving UE by performing DOA detection on the serving UE, and the DOA information comprises the DOA information of the serving UE and the DOA information of other UEs, the method comprises the following steps:
a, receiving a plurality of candidate DOA information from one or a plurality of adjacent base stations, wherein the candidate DOA information comprises DOA information obtained by the adjacent base stations through DOA detection;
b, determining the real DOA information of the service UE in the DOA information obtained by performing DOA detection by the UE based on the candidate DOA information;
wherein, based on the candidate DOA information, determining the real DOA information of the serving UE in the DOA information obtained by performing DOA detection by itself includes:
for a plurality of candidate DOA information from an adjacent base station, the DOAs of the adjacent base station and the service UE are calculated by respectively adding or subtracting the candidate DOAs with the offset of the antenna array face of the adjacent base station, if a certain obtained DOA is matched with the DOA obtained by the DOA detection, the DOA matched with the candidate DOA in the DOA obtained by the DOA detection is the real DOA of the service UE.
2. The method according to claim 1, wherein the method comprises the steps of:
-obtaining antenna array orientation information of one or more neighbouring base stations, stored;
wherein the step b comprises the following steps:
-determining, for a plurality of candidate DOA information from a neighboring base station, DOA information corresponding to the serving UE and other UEs, respectively, among DOA information obtained by performing DOA detection by itself, based on antenna array orientation information of itself and the neighboring base station.
3. The method according to claim 1 or 2, wherein the method comprises the steps of:
and m, based on the determined DOA information respectively corresponding to the service UE and the other UEs, executing cooperative beamforming operation, and canceling transmission interfaces corresponding to the other UEs, thereby eliminating transmission interference to the other UEs.
4. The method of claim 3, wherein the step m comprises the steps of:
-if there are a plurality of other UEs, selecting one or more of the other UEs;
-performing a cooperative beamforming operation based on DOA information of the selected one or more other UEs, thereby cancelling transmission interference to the one or more other UEs.
5. The method according to claim 1, wherein the method comprises the steps of:
sending DOA information obtained by performing DOA detection to one or more adjacent base stations, so that the adjacent base stations can determine the DOA information of the UE served by the adjacent base stations.
6. A direction determining device for determining DOA information of a serving UE in a base station, wherein the base station obtains the DOA information of the serving UE by performing DOA detection on the serving UE, and the DOA information comprises the DOA information of the serving UE and the DOA information of other UEs, the direction determining device comprises:
the device comprises a receiving device and a sending device, wherein the receiving device is used for receiving a plurality of candidate DOA information from one or a plurality of adjacent base stations, and the candidate DOA information comprises DOA information obtained by the adjacent base stations through DOA detection;
a determining device, configured to determine, based on the candidate DOA information, real DOA information of the serving UE in DOA information obtained by performing DOA detection by itself;
wherein, based on the candidate DOA information, determining the real DOA information of the serving UE in the DOA information obtained by performing DOA detection by itself includes:
for a plurality of candidate DOA information from an adjacent base station, the DOAs of the adjacent base station and the service UE are calculated by respectively adding or subtracting the candidate DOAs with the offset of the antenna array face of the adjacent base station, if a certain obtained DOA is matched with the DOA obtained by the DOA detection, the DOA matched with the candidate DOA in the DOA obtained by the DOA detection is the real DOA of the service UE.
7. The position-determining device of claim 6, wherein the position-determining device comprises:
acquiring means for acquiring antenna array orientation information of one or more neighboring base stations, which has been stored;
wherein the determining means is for:
-determining, for a plurality of candidate DOA information from a neighboring base station, DOA information corresponding to the serving UE and other UEs, respectively, among DOA information obtained by performing DOA detection by itself, based on antenna array orientation information of itself and the neighboring base station.
8. The position determining apparatus according to claim 6 or 7, wherein the position determining apparatus comprises:
and the execution device is used for executing the cooperative beamforming operation based on the determined DOA information respectively corresponding to the service UE and the other UEs, and canceling the transmission interfaces corresponding to the other UEs, thereby eliminating the transmission interference to the other UEs.
9. The position-determining device of claim 8, wherein the performing means is to:
-if there are a plurality of other UEs, selecting one or more of the other UEs;
-performing a cooperative beamforming operation based on DOA information of the selected one or more other UEs, thereby cancelling transmission interference to the one or more other UEs.
10. The position-determining device of claim 6, wherein the position-determining device comprises:
and the sending device is used for sending the DOA information obtained by the DOA detection to one or more adjacent base stations so that the adjacent base stations can determine the DOA information of the UE served by the adjacent base stations.
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