US20150271684A1 - Antenna apparatus for base station and operation method therefor - Google Patents

Antenna apparatus for base station and operation method therefor Download PDF

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Publication number
US20150271684A1
US20150271684A1 US14/730,029 US201514730029A US2015271684A1 US 20150271684 A1 US20150271684 A1 US 20150271684A1 US 201514730029 A US201514730029 A US 201514730029A US 2015271684 A1 US2015271684 A1 US 2015271684A1
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United States
Prior art keywords
antenna
vertical tilting
tilting angle
cell
unit
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Abandoned
Application number
US14/730,029
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English (en)
Inventor
Hae Sung Park
Duk Kyung Kim
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SK Telecom Co Ltd
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SK Telecom Co Ltd
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Assigned to SK TELECOM CO., LTD. reassignment SK TELECOM CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KIM, DUK KYUNG, PARK, HAE SUNG
Publication of US20150271684A1 publication Critical patent/US20150271684A1/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • 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
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present disclosure relates to an antenna apparatus for a base station to improve a basic data transmission rate and promote capability improvements.
  • the air exists between a base station (BS) and a user equipment (UE), and an antenna apparatus is used to transmit and/or receive wireless signals between the BS and the UE.
  • BS base station
  • UE user equipment
  • an antenna apparatus of the BS requires the application of carrier aggregation in which various frequency bands simultaneously operate to handle a rapid increase in data traffic.
  • the BS applying the carrier aggregation transmits antenna beams (Component Carriers: CCs) of a plurality of frequency bands to one cell, so that coverage of antenna beams of each of the various frequency bands exists in one cell.
  • CCs Component Carriers
  • An antenna apparatus 1 the BS 10 transmits antenna beams CC 1 and CC 2 of two frequency bands to one cell, so that coverage of antenna beams of two frequency bands exist with respect to one cell.
  • an antenna apparatus 2 of the BS 20 transmits antenna beams CC 1 and CC 2 of two frequency bands to one cell, so that coverages of antenna beams of two frequency bands exist with respect to one cell.
  • the inventor(s) has noted that when a communication service is provided through a BS applying carrier aggregation, a UE uses a wider bandwidth through the BS, and thus a rapid increase in data traffic is efficiently handled and the data transmission rate is improved.
  • an antenna apparatus for base station (BS) having at least one cell comprises two or more antenna units and a tilting angle control unit.
  • the two or more antenna units is configured to form antenna beams based on predetermined vertical tilting angles for each of two or more different frequency bands with respect to the cell.
  • the tilting angle control unit is configured to control vertical tilting angles designated to the two or more antenna units, respectively, to be different from each other, so as to make coverages of the antenna beams of the two or more different frequency bands formed by the two or more antenna units different from each other with respect to the cell.
  • a method of operating an antenna apparatus for base station (BS) having at least one cell includes: identifying two or more antenna units for forming antenna beams based on predetermined vertical tilting angles for each of two or more different frequency bands with respect to the cell; and controlling vertical tilting angles designated to the two or more antenna units, respectively, to be different from each other, so as to make coverages of antenna beams of the two or more different frequency bands formed by the two or more antenna units different from each other with respect to the cell.
  • FIG. 1 is an example in which a BS to which carrier aggregation is applied provides coverage of antenna beams according to a plurality of frequency bands;
  • FIG. 2 is an example in which BSs having an antenna apparatus for BS provides coverage of antenna beams according to various frequency bands according to an exemplary embodiment of the present disclosure
  • FIG. 3 is a block diagram of a configuration of an antenna apparatus for BS according to an exemplary embodiment of the present disclosure
  • FIG. 4 is sectors (cells) included in BSs having antenna apparatuses for BS according to an exemplary embodiment of the present disclosure.
  • FIGS. 5 and 6 are flowcharts of an operation method of an antenna apparatus for BS according to an exemplary embodiment of the present disclosure.
  • Some embodiments of the present disclosure provide an antenna apparatus for base station (BS) and an operation method thereof, which improve the basic data transmission rate according to the carrier aggregation and also promote more various capability improvements by using a configuration for implementing the carrier aggregation.
  • BS base station
  • BSs 1 and 2 to which carrier aggregation is applied provide coverage of antenna beams according to various frequency bands (for example, two frequency bands) will be described with reference to FIG. 1 .
  • the antenna apparatus 1 for BS of the BS 10 forms the same radiation pattern (or antenna pattern or far-field pattern) for antenna beams CC 1 and CC 2 of two different frequency bands in the same radiated direction with respect to one cell, so that coverages of antenna beams of two different frequency bands exist in one cell.
  • the antenna apparatus 2 for BS of the BS 20 forms the same radiation pattern for antenna beams CC 1 and CC 2 of two different frequency bands in the same radiated direction with respect to one cell, so that coverages of antenna beams of two different frequency bands exist in one cell.
  • a UE uses a wider bandwidth through the BS, and thus a rapid increase in data traffic is able to be efficiently handled and a data transmission rate is able to be improved.
  • the present disclosure provides an antenna apparatus for BS which improves the basic data transmission rate according to the carrier aggregation and also promotes more various capability improvements by using a configuration for implementing the carrier aggregation.
  • a vertical tilting angle of an antenna unit forming the antenna beam CC 1 and a vertical tilting angle of an antenna unit forming the antenna beam CC 2 are the same as each other, so that coverages of the antenna beams of two different frequency bands are nearly the same in one cell as illustrated in FIG. 1 .
  • the term of “antenna beam” indicates a radiation pattern (or antenna pattern or far-field pattern) in the field of antenna design, which refers to directional (angular) dependence of the strength of the radio waves (i.e., signals) from the antenna or other source.
  • the “antenna beam” also indicates a radiation pattern in a particular direction or directional pattern by transmitting the radio waves to a designated coverage area (e.g., one or more cells), for example, depending on a strength of the radio waves (i.e., a power control of a radiation pattern).
  • a designated coverage area e.g., one or more cells
  • a vertical tilting angle of an antenna unit e.g., antenna unit 1 of two or more antenna units 110 a in FIG. 3
  • a vertical tilting angle of an antenna unit e.g., antenna unit 2 of two or more antenna units 110 a in FIG. 3
  • the antenna beam CC 2 are controlled to be different from each other.
  • the antenna apparatus 100 for BS of the BS 10 forms different radiation patterns (or antenna patterns or far-field patterns) in a different direction for antenna beams CC 1 and CC 2 of two different frequency bands with respect to one cell, so that coverages of the antenna beams of the two different frequency bands are different from each other in one cell.
  • the antenna apparatus 200 for BS of the BS 20 forms different radiation patterns (or antenna patterns or far-field patterns) in a different direction for antenna beams CC 1 and CC 2 of two different frequency bands with respect to one cell, so that coverages of the antenna beams of the two different frequency bands are different from each other in one cell.
  • the vertical tilting angle of the antenna unit forming the antenna beam CC 1 and the vertical tilting angle of the antenna unit forming the antenna beam CC 2 are controlled to be in different directions for antenna beams from each other.
  • the coverage of the antenna beam CC 1 of the BS 10 and the coverage of the antenna beam CC 1 of the BS 20 are not overlap each other in areas or cell(s) commonly covered or radiated by the BS 10 and the BS 20
  • the coverage of the antenna beam CC 2 of the BS 10 and the coverage of the antenna beam CC 2 of the BS 20 are not overlap each other in areas or cell(s) commonly covered or radiated by the BS 10 and the BS 20 .
  • the antenna apparatus 100 for BS corresponds to an apparatus included in the BS 10 having (or covering) a cell or cell(s), which includes two or more antenna units 110 a for forming antenna beams for each of two or more different frequency bands based on predetermined vertical tiling angles, and a tilting angle control unit 120 configured to control the predetermined vertical tilting angles of the two or more antenna units 110 a to be set as different tiling angles from each other, so as to make coverages of the antenna beams according to the two or more different frequency bands formed or radiated by the two or more antenna units 110 a with respect to one cell, different from each other.
  • the BS 10 has a single cell (or sector) or a plurality of cells as a service coverage. That is, the BS 10 provides communication services to be transmitted to and/or received from one or more user equipments camped on the single cell or the plurality of cells.
  • the antenna apparatus 100 for BS includes two or more antenna units 110 a , two or more antenna units 110 b , and two or more antenna units 110 c in every one cell.
  • the following description will be made based on the two or more antenna units 110 a for forming antenna beams with respect to one cell (for example, a cell 13 ) among the three cells (for example, cells 11 , 12 , and 13 of FIG. 4 ) included in the BS 10 .
  • the two or more antenna units 110 a form antenna beams for two or more different frequency bands based on predetermined vertical tilting angles with respect to a cell, for example, the cell (for example, the cell 13 ) included in the BS 10 .
  • the two or more antenna units 110 a form (or radiate) antenna beams for two different frequency bands according to predetermined vertical tilting angles with respect to the cell.
  • the two or more antenna units 110 a includes antenna unit 1 for forming an antenna beam of the first frequency band with respect to the cell and antenna unit 2 for forming an antenna beam of the second frequency band with respect to the cell.
  • the antenna apparatus 100 for BS forms the antenna beam (hereinafter, referred to as CC 1 ) of the first frequency band radiated (or transmitted) by antenna unit 1 and forms the antenna beam (hereinafter, referred to as CC 2 ) of the second frequency band radiated (or transmitted) by antenna unit 2 with respect to the cell 13 , so that coverages of both of the antenna beams according to the two different frequency bands exist in the cell 13 .
  • the tilting angle control unit 120 of the antenna apparatus 100 for BS controls the predetermined vertical tilting angles of the two or more antenna units 110 a to be set up as different angles from each other, so as to make the coverages of the antenna beams according to the two or more different frequency bands formed by the two or more antenna units 110 a with respect to the cell set up differently as illustrated in FIG. 2 .
  • the tilting angle control unit 120 makes the coverages of the antenna beams CC 1 and CC 2 for the two different frequency bands each formed by antenna unit 1 and antenna unit 2 with respect to the cell set up differently each other by controlling the predetermined vertical tilting angles of antenna unit 1 and antenna unit 2 to be different from each other.
  • the tilting angle control unit 120 controls both of the vertical tilting angles of antenna unit 1 and antenna unit 2 to set up differently each other.
  • the tilting angle control unit 120 controls either of the vertical tilting angles of antenna unit 1 and antenna unit 2 .
  • the coverage of the antenna beam formed by the antenna unit having a larger vertical tilting angle among the two or more antenna units 110 a becomes smaller.
  • the vertical tilting angle corresponds to an angle toward the y axis from the x axis in a fourth quadrant of x and y plane coordinates as illustrated in FIG. 2 .
  • the coverage of the antenna beam CC 2 formed by antenna unit 2 faces the center of the cell and the coverage of the antenna beam CC 1 formed by antenna unit 1 faces a boundary of the cell.
  • the antenna apparatus 100 for BS controls the configuration for implementing the carrier aggregation, that is, controlling the vertical tilting angles of the respective antenna units according to frequency bands to be different from each other, so as to compensate for capability between the coverage of the antenna beam CC 1 and the coverage of the antenna beam CC 2 and thus increase an improvement effect of a basic data transmission rate according to the carrier aggregation.
  • the antenna apparatus 100 for BS controls the coverages of antenna beams of antenna unit 1 and antenna unit 2 not to overlap coverage of an antenna beam of the same frequency band used in an adjacent cell when the vertical tilting angles of antenna unit 1 and antenna unit 2 are controlled to be different from each other.
  • the antenna apparatus 100 for BS further includes an adjacent cell identification unit 130 and an adjacent cell grouping unit 140 .
  • the adjacent cell identification unit 130 identifies adjacent cells of the cell.
  • the adjacent cell identification unit 130 is highly likely to identify a single cell, for example, a cell of another adjacent BS (for example, the BS 20 ) as the adjacent cell of the cell.
  • the adjacent cell identification unit 130 is highly likely to identify a plurality of cells, for example, other cells of the BS 10 and cells of other BSs (for example, BSs 20 , 30 , and 40 ) as the adjacent cells of the cell.
  • the adjacent cell identification unit 130 identifies other cells 12 and 11 of the same BS 10 , a cell 23 of another BS 20 , a cell 32 of another BS 30 , and cells 43 and 41 of another BS 40 as the adjacent cells of the cell 13 .
  • the tilting angle control unit 120 controls the vertical tiling angles of the two or more antenna units 110 a to thereby avoid overlapping the coverages of the antenna beams for two or more different frequency bands with coverage of an antenna beam of the same frequency band formed by at least one adjacent cell among the adjacent cells identified by the adjacent cell identification unit 130 .
  • the tilting angle control unit 120 controls the vertical tilting angles of antenna unit 1 and antenna unit 2 to thereby avoid overlapping the coverages of the antenna beams CC 1 and CC 2 according to two different frequency bands with the coverage of antenna beams of the same frequency bands formed by at least one adjacent cell.
  • the tilting angle control unit 120 controls a particular antenna unit among the two or more antenna units 110 a such that a vertical tilting angle of the particular antenna unit is set up differently from a vertical tilting angle of another antenna unit of the two or more antenna units 110 a .
  • both the particular antenna and said another antenna unit form an antenna beam of the same frequency band.
  • the particular antenna unit is an antenna unit forming an antenna beam of a particular frequency band among the two or more antenna units 110 a , and the particular frequency band is one of the two or more different frequency bands.
  • At least one adjacent cell identified by the adjacent cell identification unit 130 is a single adjacent cell identified by the adjacent cell identification unit 130 .
  • the two or more different frequency bands correspond to the first frequency band and the second frequency band as described above.
  • the tilting angle control unit 120 controls a vertical tilting angle of antenna unit 1 such that the vertical tilting angle of antenna unit 1 forming an antenna beam of the first frequency band is different from a vertical tilting angle of an antenna unit of BS 20 , where the antenna unit of BS 20 forms an antenna beam of the same first frequency band in the cell 10 as one in the cell 23 of the adjacent cell, that is, the BS 20 .
  • the tilting angle control unit 120 controls the vertical tilting angle of antenna unit 1 of BS 10 to set as vertical tilting angle 1 , so as to be different from vertical tilting angle 2 .
  • the tilting angle control unit 120 make a control such that a vertical tilting angle of a particular antenna unit between antenna units 1 and 2 , for example, antenna unit 2 forming an antenna beam of the second frequency band is different from a vertical tilting angle of an antenna unit of BS 20 forming an antenna beam of the second frequency band in the cell 23 of BS 20 .
  • the tilting angle control unit 120 controls the vertical tilting angle of antenna unit 2 of BS 10 to set as vertical tilting angle 2 , so as to be different from vertical tilting angle 1 .
  • the tilting angle unit 120 controls antenna units 1 and 2 such that coverages of antenna beams of antenna units 1 and 2 do not overlap coverages of antenna beams of the same frequency bands formed in adjacent cell.
  • vertical tilting angles of the antenna units forming the antenna beams CC 1 of the first frequency band are controlled to not overlap each other and vertical tilting angles of the antenna units forming the antenna beams CC 2 of the second frequency band are controlled to not overlap each other, so that the coverage of the antenna beam CC 1 of the BS 10 does not overlap the coverage of the antenna beam CC 1 of the BS 20 and the coverage of the antenna beam CC 2 of the BS 10 does not overlap the coverage of the antenna beam CC 2 of the BS 20 .
  • At least one adjacent cell identified by the adjacent cell identification unit 130 is an adjacent cell identified within an adjacent cell group that is grouped by the adjacent cell grouping unit 140 .
  • the adjacent cell grouping unit 140 is firstly described.
  • the adjacent cell grouping unit 140 groups adjacent cells of the cell 13 , which are identified by the adjacent cell identification unit 130 .
  • the adjacent cell grouping unit 140 groups adjacent cells (for example, cells 11 , 23 , and 32 ) of which vertical tilting angles of antenna units according to respective frequency bands have been completely controlled, among adjacent cells 12 , 11 , 23 , 32 , 43 , and 41 identified by the adjacent cell identification unit 130 .
  • the adjacent cell grouping unit 140 firstly selects N adjacent cells which give the largest interference to the cell 13 from the adjacent cells of which the vertical tilting angles of the antenna units according to the respective frequency bands have been completed controlled among the adjacent cells 12 , 11 , 23 , 32 , 43 , and 41 identified by the adjacent cell identification unit 130 , and then groups the selected adjacent cells.
  • the first frequency band and the second frequency band are described as the two or more different frequency bands. It is assumed that a state where vertical tilting angle 1 is designated to the antenna unit forming the antenna beam CC 1 of the first frequency band and vertical tilting angle 2 (greater than (>) vertical tilting angle 1 ) is designated to the antenna unit forming the antenna beam CC 2 of the second frequency band is A. In contrast, it is assumed that a state where vertical titling angle 2 is designated to the antenna unit forming the antenna beam CC 1 of the first frequency band and vertical tilting angle 1 (lesser than ( ⁇ ) vertical tilting angle 2 ) is designated to the antenna unit forming the antenna beam CC 2 of the second frequency band is B.
  • the adjacent cell grouping unit 140 groups the adjacent cells 11 , 23 , and 32 , the adjacent cell 11 and the adjacent cell 32 correspond to A and the adjacent cell 23 corresponds to B among the adjacent cells 11 , 23 , and 32 within the adjacent cell group as illustrated in FIG. 4 .
  • the same adjacent cells that is, adjacent cells to which vertical tilting angle 1 is designated are the adjacent cells 11 and 32 .
  • the same adjacent cells that is, adjacent cells to which vertical tilting angle 2 is designated are the adjacent cells 11 and 32 .
  • At least one of the adjacent cells identified by the adjacent cell identification unit 130 adjacent cells 11 and 32 among the adjacent cells 11 , 23 , and 32 within the adjacent cell group.
  • the tilting angle control unit 120 controls a vertical tilting angle of a particular antenna unit between antenna units 1 and 2 , for example, antenna unit 1 forming an antenna beam of the first frequency band to be different from vertical tilting angles of antenna units forming antenna beams of the first frequency band in at least one adjacent cell (i.e., the adjacent cells 11 and 32 ) identified within the adjacent cell group.
  • the tilting angle control unit 120 controls the vertical tilting angle of antenna unit 1 to become vertical tilting angle 2 , so as to be different from vertical tilting angle 1 .
  • the tilting angle control unit 120 may make a control such that a vertical tilting angle of a particular antenna unit between antenna units 1 and 2 , for example, antenna unit 2 forming an antenna beam of the second frequency band is different from vertical tilting angles of antenna units forming antenna beams of the second frequency band in the adjacent cells 11 and 32 .
  • the tilting angle control unit 120 controls the vertical tilting angle of antenna unit 2 to become vertical tilting angle 1 , so as to be different from vertical tilting angle 2 .
  • the tilting angle control unit 120 based on vertical tilting angles of antenna units designated with respect to the particular frequency band in respective adjacent cells within the adjacent cell group grouped by the adjacent cell grouping unit 140 , the tilting angle control unit 120 identifies a vertical tilting angle which is most frequently designated to the particular frequency band in the adjacent cell group.
  • the tilting angle control unit 120 identifies the vertical tilting angle, which is most frequently designated to the particular frequency band, for example, the first frequency band in the adjacent cell group including adjacent cells 11 , 23 , and 32 , as vertical tilting angle 1 .
  • At least one of the adjacent cells identified by the adjacent cell identification unit 130 corresponds to adjacent cells (i.e., the adjacent cells 11 and 32 ), which have the same vertical tilting angles corresponding to having vertical tilting angle 1 .
  • the tilting angle control unit 120 identifies the most frequently designated vertical tilting angle in the adjacent cell group including the adjacent cells 11 , 23 , and 32 with respect to a particular frequency band, that is, the second frequency band, as vertical tilting angle 2 .
  • At least one of the adjacent cells identified by the adjacent cell identification unit 130 corresponds to adjacent cells (i.e., the adjacent cells 11 and 32 ), which have the same vertical tilting angles corresponding to having vertical tilting angle 2 .
  • the tilting angle control unit 120 controls the vertical tilting angle of antenna unit 1 to become different from vertical tilting angle 1 which is most frequently designated in the adjacent cell group with respect to the first frequency band. That is, the tilting angle control unit 120 controls the vertical tilting angle of antenna unit 1 to be vertical tilting angle 2 , so as to be different from vertical tilting angle 1 .
  • the tilting angle control unit 120 controls the vertical tilting angle of antenna unit 2 to become different from vertical tilting angle 2 , which is most frequently designated in the adjacent cell group with respect to the second frequency band. That is, the tilting angle control unit 120 controls the vertical tilting angle of antenna unit 2 to be vertical tilting angle 1 , so as to be different from vertical tilting angle 2 .
  • the tilting angle control unit 120 designates the state B, which is opposite to the state A of the vertical tilting angles designated to the antenna units, to the cell, so that the coverage of the cell is controlled to not overlap the coverage of the antenna beam of the same frequency band used in the adjacent cells 11 and 32 .
  • the tilting angle control unit 120 controls and/or designates vertical tilting angles of respective antenna units with respect to all cells (for example, the cells 11 , 12 , and 13 ) of the BS 10 as well as the cell 13 of the BS 10 .
  • the antenna apparatus 100 for BS controls the configuration for implementing the carrier aggregation, that is, control the vertical tilting angles of the respective antenna units according to respective frequency bands to be different from each other, and further controls the vertical tilting angles to be different from vertical tilting angles of antenna units of the same frequency band used in adjacent cells, so that inter-cell interference at the cell boundary is able to be reduced and thus performance is able to be improved.
  • the vertical tilting angles of the antenna units according to the respective frequency bands are different from each other, not only coverage of the antenna beams CC 1 and CC 2 according to respective frequency bands but also the antenna pattern and path loss become different.
  • a radio resource scheduling method suitable for the antenna apparatus 100 for BS according to the present disclosure which makes the vertical tilting angles of the antenna units according to respective frequency bands different from each other as described above, is also needed.
  • the antenna apparatus 100 for BS further includes a scheduling unit 150 .
  • the scheduling unit 150 Based on the vertical tilting angles designated to the two or more antenna units 110 a with respect to the cell 13 of the BS 10 , the scheduling unit 150 sequentially performs radio resource scheduling according to the sequence from the frequency band of the antenna unit having the largest vertical tilting angle to the frequency band of the antenna unit having the smallest vertical tilting angle among the two or more different frequency bands.
  • the two or more different frequency bands will be described as the first frequency band and the second frequency band as described above.
  • the scheduling unit 150 identifies which frequency band of the antenna unit has the largest vertical tilting angle among the vertical tilting angles designated to antenna unit 1 and antenna unit 2 .
  • the scheduling unit 150 identifies the second frequency band of antenna unit 2 , which has the largest vertical tilting angle (i.e., vertical tilting angle 2 ) among vertical tiling angle 1 and vertical tiling angle 1 .
  • the scheduling unit 150 firstly performs the radio resource scheduling with respect to the identified second frequency band between the first frequency band and the second frequency band.
  • the scheduling unit 150 since the scheduling unit 150 firstly performs radio resource scheduling for the second frequency band having the smallest coverage formed by antenna unit 2 having the largest vertical tilting angle, a UE located at the center of the cell receives radio resources based on a result of the performance of the radio resource scheduling and an average yield of the UE having received the radio resources will increase.
  • the scheduling unit 150 identifies the frequency band of the antenna unit having the largest vertical tilting angle among the remaining frequency bands except for the second frequency band for which the radio resource scheduling has been performed between the first frequency band and the second frequency band. In this case, the scheduling unit 150 identifies the first frequency band of antenna unit 1 having vertical tilting angle 1 .
  • the scheduling unit 150 firstly performs the radio resource scheduling for the second frequency band and then performs the radio resource scheduling for the first frequency band. That is, the scheduling unit 150 performs the radio resource scheduling in connection with the first frequency band based on a result of the performance of the radio resource scheduling which has been first performed for the second frequency band (for example, average yield of the UE).
  • the scheduling unit 150 performs the radio resource scheduling according to the sequence from the frequency band having the smallest coverage to the frequency band having the largest coverage (i.e., performing the radio resource scheduling from second frequency band to first frequency band in an ascending manner for a coverage of an antenna beam), so that the UE located at the cell boundary receives radio resources than the UE located at the cell center which has the increased average yield because the UE has already received radio resources.
  • the scheduling unit 150 raises a probability that the UE located at the cell center and the UE located at the cell boundary receive radio resources of frequency bands suitable therefor in consideration of coverage sizes according to respective frequency bands, which become different due to the control of the vertical tilting angles of the respective antenna units.
  • the scheduling unit 150 sequentially performs the radio resource scheduling according to respective frequency bands with respect to all cells (for example, the cells 11 , 12 , and 13 ) of the BS 10 as well as the cell 13 of the BS 10 .
  • the antenna apparatus 100 for BS sequentially performs the radio resource scheduling according to the sequence from the frequency band having the smallest coverage to the frequency band having the largest coverage in consideration of the coverage sizes according to respective frequency bands, which become different due to the control of the configuration for implementing the carrier aggregation, that is, the control of the vertical tilting angles of the respective antenna units, so that the UE located at the cell center and the UE located at the cell boundary are likely to receive radio resources of frequency bands suitable therefor.
  • the antenna apparatus for BS controls the configuration for implementing the carrier aggregation, that is, controls the vertical tilting angles of the respective antenna units according to respective frequency bands to be different from each other and further controls the vertical tilting angles to be different from vertical tilting angles of antenna units of the same frequency bands used in adjacent cells, so that a basic data transmission speed can be improved according to the carrier aggregation and also the UE located at the cell center and the UE located at the cell boundary can receive radio resources of frequency bands suitable therefor.
  • the tilting angle control unit 120 the adjacent cell identification unit 130 , the adjacent cell grouping unit 140 , and the scheduling unit 150 are described as components included in the antenna apparatus for BS installed in each BS, the above described embodiments are not limited to the present disclosure and various embodiments of the present disclosure are embodied.
  • a separate central unit that includes the tilting angle control unit 120 , the adjacent cell identification unit 130 , the adjacent cell grouping unit 140 , and the scheduling unit 150 may be provided, and the central unit may control each BS (for example, BS 10 , 20 , 30 . . . ) or control each antenna apparatus (for example, antenna apparatus 100 , 200 , 300 . . . ) for BS installed in each BS (for example, BS 10 , 20 , 30 . . . ), thereby implementing the present disclosure.
  • each BS for example, BS 10 , 20 , 30 . . .
  • each antenna apparatus for example, antenna apparatus 100 , 200 , 300 . . .
  • the antenna apparatuses 100 comprises input units (not shown) such as one or more buttons, a touch screen, a mic and so on, and output units (not shown) such as a display, an indicator and so on.
  • the tilting angle control unit 120 further includes one or more motors each installed in and connected to each antenna unit to control corresponding vertical tilting angle of each antenna unit.
  • the operation method of the antenna apparatus for BS identifies two or more antenna units 110 a forming antenna beams for two or more different frequency bands with respect to the cell (for example, cell 13 ) among the three cells (for example, cells 11 , 12 , and 13 ) included in the BS 10 in step S 100 .
  • the two or more different frequency bands will be described as two frequency bands (for example, a first frequency band and a second frequency band).
  • the operation method of the antenna apparatus for BS identifies antenna unit 1 forming an antenna beam of the first frequency band and antenna unit 2 forming an antenna beam of the second frequency band with respect to the cell 13 .
  • the operation method of the antenna apparatus for BS identifies adjacent cells of the cell 13 in step S 110 .
  • the operation method of the antenna apparatus for BS identifies other cells 12 and 11 of the same BS 10 , a cell 23 of another BS 20 , a cell 32 of another BS 30 , and cells 43 and 41 of another BS 40 as the adjacent cells of the cell 13 .
  • the operation method of the antenna apparatus for BS groups the adjacent cells identified in step S 110 when the number of adjacent cells identified in step S 110 are plural in step S 120 .
  • the operation method of the antenna apparatus for BS groups adjacent cells (for example, cells 11 , 23 , and 32 ) of which vertical tilting angles of antenna units according to respective frequency bands have been completely controlled, among the adjacent cells 12 , 11 , 23 , 32 , 43 , and 41 identified in step S 110 .
  • the operation method of the antenna apparatus for BS firstly select N adjacent cells which give the largest interference to the cell 13 from the adjacent cells of which the vertical tilting angles of the antenna units according to the respective frequency bands have been completed controlled among the adjacent cells 12 , 11 , 23 , 32 , 43 , and 41 identified in step S 110 , and then groups the selected adjacent cells.
  • the operation method of the antenna apparatus for BS identifies, among the grouped adjacent cells within the adjacent cell group, one or more adjacent cells which have antenna units of which vertical titling angles according to a particular frequency band are the same among two or more different frequency bands in step S 130 .
  • the two or more different frequency bands will be described as the first frequency band and the second frequency band.
  • a state where vertical titling angle 1 is designated to the antenna unit forming the antenna beam CC 1 of the first frequency band and vertical tilting angle 2 (greater than (>) vertical tilting angle 1 ) is designated to the antenna unit forming the antenna beam CC 2 of the second frequency band is A.
  • a state where vertical titling angle 2 is designated to the antenna unit forming the antenna beam CC 1 of the first frequency band and vertical tilting angle 1 (lesser than ( ⁇ ) vertical tilting angle 2 ) is designated to the antenna unit forming the antenna beam CC 2 of the second frequency band is B.
  • the adjacent cell 11 and the adjacent cell 32 correspond to A and the adjacent cell 23 corresponds to B among the adjacent cells 11 , 23 , and 32 within the adjacent cell group as illustrated in FIG. 4 .
  • the same adjacent cells that is, adjacent cells to which vertical tilting angle 1 is designated are the adjacent cells 11 and 32 .
  • the same adjacent cells that is, adjacent cells to which vertical tilting angle 2 is designated are the adjacent cells 11 and 32 .
  • the operation method of the antenna apparatus for BS identifies the adjacent cells 11 and 32 among the respective adjacent cells within the adjacent cell group in step S 130 .
  • the operation method of the antenna apparatus for BS controls the vertical tilting angles of antenna unit 1 and antenna unit 2 to not overlap vertical titling angles designated to the antenna units of the same frequency band in the adjacent cells 11 and 32 identified in step S 130 .
  • the operation method of the antenna apparatus for BS controls the vertical tilting angle of antenna unit 1 forming the antenna beam of a particular frequency band, for example, the first frequency band between the two frequency bands to be different from the vertical tilting angle of the antenna unit forming the antenna beam of the first frequency band in the adjacent cells 11 and 32 .
  • the operation method of the antenna apparatus for BS controls the vertical tilting angle of antenna unit 1 to become vertical tilting angle 2 , so as to be different with vertical tilting angle 1 .
  • the operation method of the antenna apparatus for BS controls the vertical tilting angle of antenna unit 2 forming the antenna beam of a particular frequency band, for example, the second frequency band between the two frequency bands to be different from the vertical tilting angle of the antenna unit forming the antenna beam of the second frequency band in the adjacent cells 11 and 32 .
  • the operation method of the antenna apparatus for BS controls the vertical tilting angle of antenna unit 2 to become vertical tilting angle 1 , so as to be different from vertical tilting angle 2 .
  • the operation method of the antenna apparatus for BS designates the state B, which is opposite to the state A of the vertical tilting angles designated to the antenna units, to the cell, so that the coverage of the cell is controlled to not overlap the coverage of the antenna beam of the same frequency band used in the adjacent cells 11 and 32 .
  • the operation method of the antenna apparatus for BS controls the vertical tilting angles of antenna unit 1 and antenna unit 2 to not overlap vertical tilting angles designated to antenna units of the same frequency bands in the single adjacent cell (for example, the cell 23 of the BS 20 ) identified in step S 110 in step S 140 without steps S 120 and S 130 .
  • the operation method of the antenna apparatus for BS controls the vertical tilting angle of antenna unit 1 to become vertical tilting angle 1 , so as to be different with vertical tilting angle 2 .
  • the operation method of the antenna apparatus for BS controls the vertical tilting angle of antenna unit 2 to become vertical tilting angle 2 , so as to be different with vertical tilting angle 1 .
  • the operation method of the antenna apparatus for BS determines whether the vertical tilting angles are controlled with respect to all cells of the BS 10 in step S 150 .
  • the operation method of the antenna apparatus for BS identifies two or more antenna units 110 a forming antenna beams for two or more different frequency bands with respect to the next cell (for example, the cell 12 ) in step S 160 and enters step S 110 described above.
  • the operation method of the antenna apparatus for BS ends the control of the vertical tilting angles in the BS 10 .
  • the operation method of the antenna apparatus for BS identifies a frequency band of an antenna unit having the largest vertical tilting angle for each cell in step S 210 .
  • the following description will be made based on the cell 13 among the respective cells of the BS 10 .
  • the operation method of the antenna apparatus for BS identifies a frequency band of an antenna unit having the largest vertical tilting angle between antenna 1 and antenna 2 with respect to the cell 13 .
  • the operation method of the antenna apparatus for BS identifies the second frequency band of antenna unit 2 having the largest vertical tilting angle (i.e., vertical tilting angle 2 ).
  • the operation method of the antenna apparatus for BS firstly performs radio resource scheduling in connection with the second frequency band between the first frequency band and the second frequency band in step S 220 .
  • the operation method of the antenna apparatus for BS since the operation method of the antenna apparatus for BS according to an exemplary embodiment of the present disclosure firstly performs radio resource scheduling for the second frequency band having the smallest coverage formed by antenna unit 2 having the largest vertical tilting angle, a UE located at the center of the cell receives radio resources based on a result of the performance of the radio resource scheduling and an average yield of the UE having received the radio resources will increase.
  • the operation method of the antenna apparatus for BS determines whether the radio resource scheduling is completed for all frequency bands of the cell 13 in step S 230 .
  • the operation method of the antenna apparatus for BS identifies a frequency band of an antenna unit having the largest vertical tilting angle of the other frequency band except for the second frequency band for which the radio resource scheduling has been performed between the first frequency band and the second frequency band in step S 240 .
  • the operation method of the antenna apparatus for BS according to an exemplary embodiment of the present disclosure identifies the first frequency band of antenna unit 1 having vertical tilting angle 1 .
  • the operation method of the antenna apparatus for BS according to an exemplary embodiment of the present disclosure performs the radio resource scheduling in connection with the first frequency band in step S 220 . That is, the operation method of the antenna apparatus for BS according to an exemplary embodiment of the present disclosure performs the radio resource scheduling in connection with the first frequency band based on a result of the performance of the radio resource scheduling which has been first performed for the second frequency band (for example, average yield of the UE).
  • the operation method of the antenna apparatus for BS according to an exemplary embodiment of the present disclosure determines again whether the radio resource scheduling is completed for all frequency bands of the cell 13 in step S 230 .
  • the operation method of the antenna apparatus for BS according to an exemplary embodiment of the present disclosure determines that the radio resource scheduling is completed for all frequency bands in step S 230 —Yes and ends the radio resource scheduling.
  • the operation method of the antenna apparatus for BS performs the radio resource scheduling first for the second frequency band having the smallest coverage and then performs the radio resource scheduling for the first frequency band having a relatively large coverage based on a result of the performance of the radio resource scheduling according to the first radio resource scheduling, so that the UE located at a cell boundary is likely to receive radio resources than the UE located at the cell center, which has the increased average yield because the UE has already received the radio resources.
  • the operation method of the antenna apparatus for BS sequentially performs the radio resource scheduling according to the sequence from the frequency band having the smallest coverage to the frequency band having the largest coverage in consideration of the coverage sizes according to respective frequency bands which become different due to the control of the vertical tilting angles of the respective antenna units, so that the UE located at the cell center and the UE located at the cell boundary are likely to receive radio resources of frequency bands suitable therefor.
  • Non-transitory computer-readable recording medium includes magnetic media such as a hard disc, a floppy disc and a magnetic tape, optical media such as a CD-ROM and a DVD, magneto-optical media such as a floptical disc, and a hardware device, such as a ROM, a RAM, a flash memory, which is specially designed to store and perform the program instruction.
  • Examples of the program command include a machine language code generated by a compiler and a high-level language code executable by a computer through an interpreter and the like.
  • the hardware devices are configured to operate as one or more software modules and/or microprocessors to perform the operations of some embodiments of the present disclosure, and vice versa.
  • one or more of the processes or functionality described herein is/are performed by specifically configured hardware (e.g., by one or more application specific integrated circuits or ASIC(s)). Some embodiments incorporate more than one of the described processes in a single ASIC. In some embodiments, one or more of the processes or functionality described herein is/are performed by at least one processor which is programmed for performing such processes or functionality.
  • an antenna apparatus for BS and an operation method thereof improve the basic data transmission rate according to the carrier aggregation and also promote more various capability improvements by using a configuration for implementing the carrier aggregation.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)
US14/730,029 2013-03-19 2015-06-03 Antenna apparatus for base station and operation method therefor Abandoned US20150271684A1 (en)

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KR1020130029311A KR101455814B1 (ko) 2013-03-19 2013-03-19 기지국용 안테나장치 및 그 장치의 동작 방법
PCT/KR2014/002083 WO2014148768A1 (ko) 2013-03-19 2014-03-13 기지국용 안테나장치 및 그 장치의 동작 방법

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KR101455814B1 (ko) 2014-11-03
KR20140114675A (ko) 2014-09-29
US9761938B2 (en) 2017-09-12
WO2014148768A1 (ko) 2014-09-25

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