WO2014098339A1 - 헤테로지니어스 네트워크의 허브 장치, 그리고 이의 부하 분산 방법 - Google Patents
헤테로지니어스 네트워크의 허브 장치, 그리고 이의 부하 분산 방법 Download PDFInfo
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- WO2014098339A1 WO2014098339A1 PCT/KR2013/006720 KR2013006720W WO2014098339A1 WO 2014098339 A1 WO2014098339 A1 WO 2014098339A1 KR 2013006720 W KR2013006720 W KR 2013006720W WO 2014098339 A1 WO2014098339 A1 WO 2014098339A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/22—Performing reselection for specific purposes for handling the traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/32—Hierarchical cell structures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/06—Hybrid resource partitioning, e.g. channel borrowing
- H04W16/08—Load shedding arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to a hub device of a heterogeneous network and a load balancing method thereof.
- a network is constructed of a repeater or femtocell using a radio frequency cable.
- the inbuilding network has attracted attention as a Neutral hosting method for establishing a common network and providing a service to a plurality of communication providers through a common network.
- an inbuilding network can be constructed as a heterogeneous network (Het-Net) in which a small cell is added to a macro cell.
- Het-Net heterogeneous network
- the macrocell serves a large area and installs small cells in hotspots.
- the network operator has to design macro cell and small cell on the basis of maximum traffic cost, which is expensive.
- the small cell composed of the third party equipment does not have an interface connected to the macro cell. Therefore, even if the traffic surges in the small cell, the adjacent macro cell digital signal processing apparatus is difficult to distribute the load of the small cell in which the traffic has exploded.
- an area that requires many small cells such as a shopping mall or a stadium, needs a technique for adaptively distributing loads between the macro cell and the small cell against traffic fluctuations over time.
- the problem to be solved by the present invention is a hub for distributing the load by selectively changing the digital signal processing apparatus for processing the traffic of each cell according to the fluctuation of the traffic of the macro cell and the small cell, or by changing the coverage of the macro cell and the small cell To provide a device.
- At least one macro cell and a plurality of small cells overlap each other, and a macro cell digital unit performing digital signal processing of each macro cell and a small cell performing digital signal processing of the plurality of small cells.
- a hub device for distributing the load of the small cell digital unit to the macro cell digital unit, wherein the plurality of the plurality of small cell digital units are based on the load of the macro cell digital unit and the small cell digital unit.
- a load balancing controller for generating a first control signal requesting to connect the first digital unit, and one side A path connected to an antenna installed in the macro cell and a small power radio unit installed in each small cell, and the other side connected to the macro cell digital unit and the small cell digital unit, respectively, and connecting the one side and the other side; And a path changing unit for changing a digital unit to which the corresponding low power radio unit is connected based on the first control signal.
- the load balancing controller may reduce coverage of a macrocell in which the first digital unit performs digital signal processing when the first digital unit does not have a spare resource for processing the load of the first small cell.
- the load balancing controller generates a second control signal requesting to lower the output of the antenna related to the first digital unit, is connected to an antenna installed in the macrocell, and outputs the antenna based on the second control signal. It may further include an antenna output changer for adjusting the.
- the hub device may further include a load detector configured to detect loads of the macrocell digital unit and the small cell digital unit based on uplink interference information of each of the macrocell and the plurality of small cells.
- the other side of the path changing unit may be connected to the macro radio unit and the small cell radio unit, respectively, the macro radio unit may be connected to the macro cell digital unit, and the small cell radio unit may be connected to the small cell digital unit.
- At least one macro cell and a plurality of small cells overlap each other, and a macro cell digital unit performing digital signal processing of each macro cell and a small cell digital performing digital signal processing of the plurality of small cells.
- a hub device distributes the load of the small cell digital unit to the macro cell digital unit, the hub device receiving from the antenna installed in the macro cell and the small power radio unit installed in each small cell.
- the determining of the first digital unit may reduce the coverage of the macro cell connected to the first digital unit when the first digital unit does not have a spare resource for processing the load of the first small cell.
- the determining of the first digital unit may reduce the coverage of the macrocell in which the first digital unit performs digital signal processing by lowering the output of the antenna related to the first digital unit.
- the transferring to the first digital unit may change the path through which the traffic of the first small cell is transmitted from the small cell digital unit to the first digital unit.
- At least one macro cell and a plurality of small cells overlap each other, and a macro cell digital unit performing digital signal processing of each macro cell and a small cell performing digital signal processing of the plurality of small cells.
- a hub device distributes the load of the small cell digital unit to the macro cell digital unit, the method being received from an antenna installed in the macro cell and a small power radio unit installed in each small cell.
- the load balancing target among the plurality of small cells Determining a first small cell, wherein the macro cell digital unit is Determining a digital unit to process the load of the first small cell among the at least one macrocell digital unit based on the spare resource; Reducing coverage of the macrocell connected to the first digital unit, and delivering traffic received from the small power radio unit installed in the first small cell to the first digital unit.
- the transmitting of the traffic received from the small power radio unit to the first digital unit may change the digital unit performing the digital signal processing of the first small cell from the small cell digital unit to the first digital unit.
- Reducing the coverage of the macrocell may reduce the output of the antenna related to the first digital unit, thereby reducing the coverage of the macrocell in which the first digital unit performs digital signal processing.
- the traffic received from the small output radio unit installed in the first small cell to the second digital unit I can deliver it.
- the hub device may distribute the load by changing a path where the macro cell and the small cell are connected to the digital signal processing device according to the traffic variation of each network without changing the network.
- the resources of the digital signal processing apparatus can be shared by the macro cell and the small cell, the resource efficiency of the entire network can be improved. Therefore, according to the embodiment of the present invention, the load can be efficiently distributed in areas with high traffic fluctuations such as squares or sports grounds, thereby reducing the work of increasing network resource capacity to support the temporarily increasing events.
- the hub device may change the signal path of the small cell into a digital signal processing device of the macro cell to interoperate the macro cell with the small cell. Can be.
- FIG. 1 is a diagram illustrating a heterogeneous network according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating an exemplary configuration of a heterogeneous network.
- FIG. 3 is a diagram illustrating an exemplary configuration of a heterogeneous network rescued in an inbuilding.
- FIG. 4 is a diagram illustrating a load of a heterogeneous network.
- FIG. 5 is a diagram illustrating an exemplary configuration of a heterogeneous network including a hub device according to an embodiment of the present invention.
- FIG. 6 is a diagram illustrating load balancing according to an embodiment of the present invention.
- FIG. 7 is a diagram illustrating an exemplary configuration of a heterogeneous network including a hub device according to another embodiment of the present invention.
- FIG. 8 is a diagram illustrating load balancing according to another embodiment of the present invention.
- FIG. 9 is a block diagram of a hub device according to one embodiment of the invention.
- FIG. 10 is a flowchart of a load balancing method of a hub device according to an embodiment of the present invention.
- FIG. 11 is a flowchart illustrating a load balancing method of a hub device according to another embodiment of the present invention.
- FIG. 1 is a diagram illustrating a heterogeneous network according to an embodiment of the present invention.
- Het-Net heterogeneous network
- the macro cell 21 serving as the service area of the base station 20 overlaps with the small cell 31 serving as the service area of the base station 30.
- the small cell 31 is a cell having a narrower coverage than the macro cell 21.
- a plurality of small cells 31 may exist in one macro cell 21.
- the plurality of macrocells 21 may overlap or adjoin.
- FIG. 2 is a diagram illustrating an exemplary configuration of a heterogeneous network
- FIG. 3 is a diagram illustrating an exemplary configuration of a heterogeneous network rescued in an inbuilding
- FIG. 4 is a diagram illustrating a load of a heterogeneous network.
- a base station may be divided into an apparatus for processing digital signal and an apparatus for processing radio signal.
- the digital signal processing apparatus will be described simply as a digital unit (Digital Unit (DU)), which will be referred to as "DU”.
- the radio signal processing apparatus will be described simply as a radio unit (RU), which will be referred to as "RU”.
- RU radio unit
- a plurality of RUs may be connected to one DU, it is assumed that one DU is connected to one RU.
- Each of the DUs 100, 110, and 120 is connected to the RUs 200, 210, and 220 to perform various digital signal processing and resource management control related to the terminal.
- Each of the DUs 100, 110, and 120 is assigned a different cell identifier (Physical Cell ID).
- the DUs 100-120 are connected to the core network.
- the core network may include a mobility management entity, an MME, a serving gateway (Serving GateWay, S-GW), and a packet gateway (Packet GateWay, P-GW).
- the RUs 200, 210, and 220 are installed in certain cells.
- the RU amplifies a radio signal of a radio signal processing section of a base station and transmits the radio signal to an antenna.
- the RU transmits and receives a radio signal with a terminal.
- the RU 200 is connected to the antenna 300 to provide a service to the macrocell 500
- the RU 210 is connected to the antenna 310 to provide a service to the macrocell 600.
- each of the small power RUs 400-430 serves the small cells 700, 710, 720, and 730.
- the low power RUs 400-430 may be connected to the RU 220 through a hub (not shown).
- Each small cell 700-730 overlaps at least one of the macro cells 500 and 600.
- the inbuilding network may include a DU 100-120, an RU 200-220, an antenna 300, 310, and a low power RU 400-430.
- each of the low power RUs 400-430 may be installed in each layer, and the coverage of the low power RUs 400-430 may overlap at least one of the macrocells 500 and 600.
- each DU 100-120 processes traffic of cells 500, 600, 700-730 connected to its own wireless sector resource capacity 800, 810, 820.
- the resource capacities 800, 810, and 820 are radio resource amounts of the DU.
- the radio resource may also be indicated by the amount of a radio block or a radio bearer.
- the load of the macrocell 500 currently being used is M_0, and the load of the macrocell 600 is indicated by S_0, S_1, S_2, and S_3, respectively.
- the resource capacity 820 of the DU 120 may be full.
- the small cells 700-730 and the neighboring DUs 100, 110 do not have an interface. Therefore, even if the resource capacity of the adjacent DU (800, 810) is free, it is difficult for the neighboring DU (100, 110) to distribute the traffic of the small cells (700-730).
- the operator may reduce the coverage by forcibly lowering the pilot power of the DU 120 connected to the small cells 700-730.
- the operator may forcibly incorporate the coverage of the small cells 700-730 into the macro cell by increasing the pilot power of the DUs 100 and 110 of the macro cell partially overlapping the small cells 700-730.
- the effect of the traffic flowing into the small cells 700-730 moving to the macro cells 500 and 600 is not large.
- FIG. 5 is a diagram illustrating an exemplary configuration of a heterogeneous network including a hub device according to an embodiment of the present invention
- FIG. 6 is a diagram illustrating load balancing according to an embodiment of the present invention.
- one side of the hub device 900 is connected to the RUs 200-220, and the other side is connected to the antennas 300 and 310, and the small output RUs 400-430.
- Hub device 900 is coupled to antennas 300 and 310, and to low power RUs 400-430, respectively.
- the hub device 900 transmits signals received from the antennas 300 and 310 and the low power RUs 400-430 to any one of the RUs 200-220. That is, the hub device 900 transmits the RF signals received from the antennas 300 and 310 and the low power RUs 400 to 430 to any one DU.
- the hub device 900 is connected to the DU 100-RU 200-the antenna 300, the DU 110-the RU 210-the antenna 310, and the DU 120.
- the antenna unit and the RUs 200-220 are mapped as shown in Table 1 so that the -RU 220-low power RUs 400-430 are connected to each other.
- the antenna unit includes a macro cell antenna and a low power RU.
- Table 1 Steady state Antenna part RU Antenna 300 RU (200) Antenna 310 RU (210) Low Power RU (400) RU (220) Low Power RU (410) Low Power RU (420) Low Power RU (430)
- the hub device 900 monitors the uplink interference information received from the antennas 300 and 310 and the respective low power RUs 400-430.
- the hub device 900 determines the load of each DU based on the monitoring result. Since the hub device 900 is not directly connected to the DU, the resource / load of the DU cannot be directly known. Therefore, the hub device 900 infers the load degree of each DU based on information that can be acquired by itself, that is, uplink interference information for each radio path. A cell with many users is using a lot of radio resources, and a cell using a lot of DU resources increases an uplink interference signal in proportion to the traffic. Accordingly, the hub device 900 may know the resource amount / load of the DU based on the uplink interference information.
- the hub device 900 may determine that the load of the DU 120 is high and the load of the DUs 100 and 110 is low.
- the hub device 900 changes the path of the RU and the antenna unit to process traffic of a cell connected to the DU 120 having a high load in another DU. That is, the hub device 900 connects the antenna unit and the RU 200 as shown in Table 2 to transmit the traffic of the low power RU 430 to the DU 100 that processes the traffic of the macro cell 500. Then, the small cell 730 is connected to the DU 100, the small cell 730 is changed to a cell having a cell identifier of the DU (100).
- the load of the DU 120 is lowered because traffic of the low power RU 430 does not flow.
- the traffic of the low power RU 430 is accommodated in the resource-rich DU 100.
- the resource capacity 800 of the DU 100 has a margin.
- the resource capacity 820 of the DU 120 has a margin.
- the hub device 900 may easily distribute the load of the small cell and the macro cell without changing the existing device.
- FIG. 7 is a diagram illustrating an exemplary configuration of a heterogeneous network including a hub device according to another embodiment of the present invention
- FIG. 8 is a diagram illustrating load balancing according to another embodiment of the present invention.
- the hub device 900 may adjust the coverage of the macro cell 500/600 by adjusting the output of the antenna 300/310. This reduces the traffic flowing into the DU 100/110 due to the reduced coverage. Therefore, the hub device 900 may increase the resource capacity that can accommodate the traffic of the small cell in the DU (100/110). At this time, the macro cell 500/600 overlaps with the macro cell in the adjacent region. Accordingly, the terminal located outside the macro cell having reduced coverage may be transferred to the adjacent macro cell.
- the hub device 900 lowers the output of the antenna 310 to reduce the coverage of the macro cell 600. This reduces the traffic flowing into DU 110 due to the reduced coverage. That is, the hub device 900 adjusts the coverage of the macro cell 600 to secure a margin for accommodating the traffic of the small cell 720 in the DU 110.
- the hub device 900 may reduce the coverage of the macro cell 600 so that the traffic of the small cell 720 is preferentially processed by the DU 110.
- the hub device 900 reduces the coverage of the macro cell 600 to reduce the load M_1 of the macro cell 600.
- the load M_1 is reduced, so that the resource capacity 810 is free. Accordingly, the hub device 900 distributes the load S_2 of the small cell 720 to the DU 110.
- FIG. 9 is a block diagram of a hub device according to one embodiment of the invention.
- the hub device 900 includes a load detector 910, a load balancer 930, a path changer 950, and an antenna output changer 970.
- the load detector 910 monitors the traffic amount of each of the plurality of cells 500, 600, and 700-730.
- the load detector 910 monitors uplink interference information based on the antennas 300 and 310 installed in the macrocell and the signals received from the small output RUs 400-430.
- the load detector 910 estimates a radio sector resource capacity of each cell DU, that is, a load, based on the uplink interference information.
- the load balancing controller 930 determines whether load balancing between cells is necessary based on the radio sector resource capacity of each cell DU. When the DU resource of a cell is insufficient, the load balancing controller 930 determines a load balancing target cell and a load balancing processing DU for processing the load of the load balancing target cell based on the resource capacity / load of the DU of each cell. . For example, the load balancing controller 930 determines the small cell 730 as a load balancing target cell, and determines the DU 100 to process the load of the small cell 730. The load balancing controller 930 transmits a path change request signal including a load balancing target cell and load balancing processing DU information to the path changing unit 950.
- the load balancing controller 930 determines a macrocell DU requiring coverage adjustment based on the radiosector resource capacity of each cell DU. Due to the large load of the DUs, there may be no DU to accommodate the traffic of the distributed target cell. Then, the load balancing controller 930 reduces the coverage of the macro cell DU (100, 110), reduces the traffic flowing from the macro cell to secure a certain level of DU resources. The load balancing controller 930 transmits an antenna output change request signal including macrocell information requiring coverage adjustment to the antenna output changer 970.
- the path changing unit 950 changes the connection between the corresponding RU and the antenna / power output RU based on the path change request signal received from the load balancing controller 930.
- the antenna output changing unit 970 adjusts the output of the antenna of the macro cell that requires the coverage adjustment based on the antenna output change request signal received from the load balancing controller 930.
- FIG. 10 is a flowchart of a load balancing method of a hub device according to an embodiment of the present invention.
- the hub device 900 monitors traffic volume of each cell (S110).
- the hub device 900 monitors uplink interference information based on the antennas 300 and 310 installed in the macrocell and the signals received from the respective low power RUs 400-430.
- the hub device 900 detects the load of the DU connected to each cell based on the monitoring result (S120).
- the hub device 900 determines the load balancing target cell and the load balancing processing DU for processing the load of the load balancing target cell based on the load of each DU (S130).
- the hub device 900 changes the traffic path of the distributed target cell so that the traffic of the distributed target cell is delivered to the load balancing processing DU (S140).
- the hub device 900 is located between the RUs 200-220 and the antennas 300, 310 / low power RUs 400-430. Therefore, the hub device 900 connects the antenna or the small output RU installed in the load balancing target cell to the RU connected to the load balancing processing DU. Therefore, the load of the DU of the load balancing target cell is lowered, and the low-load DU processes the traffic of the load balancing target cell.
- FIG. 11 is a flowchart illustrating a load balancing method of a hub device according to another embodiment of the present invention.
- the hub device 900 monitors traffic volume of each cell (S210).
- the hub device 900 monitors uplink interference information based on the antennas 300 and 310 installed in the macrocell and the signals received from the respective low power RUs 400-430.
- the hub device 900 detects the spare resource of the DU connected to each cell based on the monitoring result (S220).
- the hub device 900 searches for a DU having free resources to handle the load of the load balancing target cell based on the free resources of the DU connected to each cell (S230).
- the hub device 900 distributes the load of the DU 120 to other DUs when the load of the DU 120 connected to the small cells is greater than or equal to the threshold, that is, when the spare resource is less than or equal to the threshold.
- the hub device 900 lowers the output of the antenna installed in the macrocell (S240).
- the DU of the macro cell having reduced coverage is determined as the DU of the load balancing target cell.
- the hub device 900 changes the traffic path of the distribution target cell so that the traffic of the distribution target cell is delivered to the macrocell DU whose output is lowered (S250).
- the hub device may distribute the load by changing the path where the macro cell and the small cell are connected to the digital signal processing device according to the traffic variation of each network without changing the network. have.
- the resources of the digital signal processing apparatus can be shared by the macro cell and the small cell, the resource efficiency of the entire network can be improved. Therefore, according to the embodiment of the present invention, the load can be efficiently distributed in areas with high traffic fluctuations such as squares or sports grounds, thereby reducing the work of increasing network resource capacity to support the temporarily increasing events.
- the hub device may change the signal path of the small cell into a digital signal processing device of the macro cell to interoperate the macro cell with the small cell. Can be.
- the embodiments of the present invention described above are not only implemented through the apparatus and the method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiments of the present invention or a recording medium on which the program is recorded.
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Abstract
Description
| 정상 상태 | |
| 안테나부 | RU |
| 안테나(300) | RU(200) |
| 안테나(310) | RU(210) |
| 소출력 RU(400) | RU(220) |
| 소출력 RU(410) | |
| 소출력 RU(420) | |
| 소출력 RU(430) | |
| 부하 분산 상태 | |
| 안테나부 | RU |
| 안테나(300) | RU(200) |
| 안테나(310) | RU(210) |
| 소출력 RU(400) | RU(220) |
| 소출력 RU(410) | |
| 소출력 RU(420) | |
| 소출력 RU(430) | RU(200) |
Claims (13)
- 적어도 하나의 매크로셀과 복수 스몰셀이 중첩되고, 각 매크로셀의 디지털 신호 처리를 수행하는 매크로셀 디지털 유닛과 상기 복수 스몰셀의 디지털 신호 처리를 수행하는 스몰셀 디지털 유닛이 분리된 헤테로지니어스 네트워크에서, 상기 스몰셀 디지털 유닛의 부하를 상기 매크로셀 디지털 유닛으로 분산하는 허브 장치로서,상기 매크로셀 디지털 유닛과 상기 스몰셀 디지털 유닛의 부하를 기초로, 상기 복수의 스몰셀 중에서 부하 분산 대상인 제1스몰셀을 결정하고, 적어도 하나의 매크로셀 디지털 유닛 중에서 상기 제1스몰셀의 부하를 처리하는 제1디지털 유닛을 결정하며, 상기 제1스몰셀의 소출력 라디오 유닛과 상기 제1디지털 유닛을 연결하도록 요청하는 제1제어 신호를 생성하는 부하 분산 제어부, 그리고일측이 상기 매크로셀에 설치된 안테나, 그리고 각 스몰셀에 설치된 소출력 라디오 유닛에 각각 연결되고, 다른 일측이 상기 매크로셀 디지털 유닛과 상기 스몰셀 디지털 유닛으로 각각 연결되고, 상기 일측과 상기 다른 일측을 연결하는 경로를 구성하며, 상기 제1제어 신호를 기초로 해당 소출력 라디오 유닛이 연결되는 디지털 유닛을 변경하는 경로 변경부를 포함하는 허브 장치.
- 제1항에서,상기 부하 분산 제어부는상기 제1디지털 유닛이 상기 제1스몰셀의 부하를 처리하기 위한 여유 자원이 없는 경우, 상기 제1디지털 유닛이 디지털 신호 처리를 수행하는 매크로셀의 커버리지를 줄이는 허브 장치.
- 제2항에서,상기 부하 분산 제어부는상기 제1디지털 유닛에 관계된 안테나의 출력을 낮추도록 요청하는 제2제어 신호를 생성하고,상기 매크로셀에 설치된 안테나에 연결되고, 상기 제2제어 신호를 기초로 해당 안테나의 출력을 조절하는 안테나 출력 변경부를 더 포함하는 허브 장치.
- 제1항에서,상기 매크로셀과 상기 복수 스몰셀 각각의 상향링크 간섭 정보를 기초로 상기 매크로셀 디지털 유닛과 상기 스몰셀 디지털 유닛의 부하를 검출하는 부하 검출부를 더 포함하는 허브 장치.
- 제1항에서,상기 경로 변경부의 상기 다른 일측은 매크로 라디오 유닛과 스몰셀 라디오 유닛에 각각 연결되고, 상기 매크로 라디오 유닛은 상기 매크로셀 디지털 유닛에 연결되며, 상기 스몰셀 라디오 유닛은 상기 스몰셀 디지털 유닛에 연결되는 허브 장치.
- 적어도 하나의 매크로셀과 복수 스몰셀이 중첩되고, 각 매크로셀의 디지털 신호 처리를 수행하는 매크로셀 디지털 유닛과 상기 복수 스몰셀의 디지털 신호 처리를 수행하는 스몰셀 디지털 유닛이 분리된 헤테로지니어스 네트워크에서, 허브 장치가 상기 스몰셀 디지털 유닛의 부하를 상기 매크로셀 디지털 유닛으로 분산하는 방법으로서,상기 매크로셀에 설치된 안테나, 그리고 각 스몰셀에 설치된 소출력 라디오 유닛으로부터 수신한 트래픽을 기초로 상기 매크로셀 디지털 유닛과 상기 스몰셀 디지털 유닛의 부하를 검출하는 단계,상기 매크로셀 디지털 유닛과 상기 스몰셀 디지털 유닛의 부하를 기초로, 상기 복수의 스몰셀 중에서 부하 분산 대상인 제1스몰셀을 결정하고, 적어도 하나의 매크로셀 디지털 유닛 중에서 상기 제1스몰셀의 부하를 처리하는 제1디지털 유닛을 결정하는 단계, 그리고상기 제1스몰셀에 설치된 소출력 라디오 유닛으로부터 수신한 트래픽을 상기 제1디지털 유닛으로 전달하는 단계를 포함하는 부하 분산 방법.
- 제6항에서,상기 제1디지털 유닛을 결정하는 단계는상기 제1디지털 유닛이 상기 제1스몰셀의 부하를 처리하기 위한 여유 자원이 없는 경우, 상기 제1디지털 유닛에 연결된 매크로셀의 커버리지를 줄이는 부하 분산 방법.
- 제7항에서,상기 제1디지털 유닛을 결정하는 단계는상기 제1디지털 유닛에 관계된 안테나의 출력을 낮추어 상기 제1디지털 유닛이 디지털 신호 처리를 수행하는 매크로셀의 커버리지를 줄이는 부하 분산 방법.
- 제6항에서,상기 제1디지털 유닛으로 전달하는 단계는상기 제1스몰셀의 트래픽이 전달되는 경로를 상기 스몰셀 디지털 유닛에서 상기 제1디지털 유닛으로 변경하는 부하 분산 방법.
- 적어도 하나의 매크로셀과 복수 스몰셀이 중첩되고, 각 매크로셀의 디지털 신호 처리를 수행하는 매크로셀 디지털 유닛과 상기 복수 스몰셀의 디지털 신호 처리를 수행하는 스몰셀 디지털 유닛이 분리된 헤테로지니어스 네트워크에서, 허브 장치가 상기 스몰셀 디지털 유닛의 부하를 상기 매크로셀 디지털 유닛으로 분산하는 방법으로서,상기 매크로셀에 설치된 안테나, 그리고 각 스몰셀에 설치된 소출력 라디오 유닛으로부터 수신한 상향링크 간섭 정보를 기초로 상기 매크로셀 디지털 유닛과 상기 스몰셀 디지털 유닛의 여유 자원을 검출하는 단계,상기 스몰셀 디지털 유닛의 여유 자원이 임계값 이하인 경우, 상기 복수의 스몰셀 중에서 부하 분산 대상인 제1스몰셀을 결정하는 단계,상기 매크로셀 디지털 유닛의 여유 자원을 기초로, 적어도 하나의 매크로셀 디지털 유닛 중에서 상기 제1스몰셀의 부하를 처리할 디지털 유닛을 판단하는 단계,여유 자원이 있는 디지털 유닛이 없는 경우, 적어도 하나의 매크로셀 디지털 유닛 중에서 제1디지털 유닛에 연결된 매크로셀의 커버리지를 줄이는 단계, 그리고상기 제1스몰셀에 설치된 소출력 라디오 유닛으로부터 수신한 트래픽을 상기 제1디지털 유닛으로 전달하는 단계를 포함하는 부하 분산 방법.
- 제10항에서,상기 소출력 라디오 유닛으로부터 수신한 트래픽을 제1디지털 유닛으로 전달하는 단계는상기 제1스몰셀의 디지털 신호처리를 수행하는 디지털 유닛을 상기 스몰셀 디지털 유닛에서 상기 제1디지털 유닛으로 변경하는 부하 분산 방법.
- 제10항에서,상기 매크로셀의 커버리지를 줄이는 단계는상기 제1디지털 유닛에 관계된 안테나의 출력을 낮추어, 상기 제1디지털 유닛이 디지털 신호 처리를 수행하는 매크로셀의 커버리지를 줄이는 부하 분산 방법.
- 제10항에서,상기 제1스몰셀의 부하를 처리할 디지털 유닛을 결정하는 단계는여유 자원이 있는 제2디지털 유닛이 있는 경우, 상기 제1스몰셀에 설치된 소출력 라디오 유닛으로부터 수신한 트래픽을 상기 제2디지털 유닛으로 전달하는 부하 분산 방법.
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| KR1020120151332A KR101502141B1 (ko) | 2012-12-21 | 2012-12-21 | 헤테로지니어스 네트워크의 허브 장치, 그리고 이의 부하 분산 방법 |
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| JP6334868B2 (ja) * | 2013-08-30 | 2018-05-30 | 株式会社Nttドコモ | 無線基地局 |
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| US11917480B2 (en) * | 2016-06-21 | 2024-02-27 | T-Mobile Usa, Inc. | Traffic management for wireless communication network |
| EP3501209B1 (en) * | 2016-08-22 | 2021-04-14 | Telefonaktiebolaget LM Ericsson (publ) | A processing unit and a method therein for initiating cell activation |
| US10009776B1 (en) | 2016-11-22 | 2018-06-26 | Sprint Communications Company L.P. | Facilitating desired placement of a small cell |
| US11115833B1 (en) | 2018-10-05 | 2021-09-07 | Sprint Communications Company L.P. | Determining placement of a small cell |
| EP3697040B1 (en) * | 2019-02-15 | 2022-03-09 | Nokia Solutions and Networks Oy | Congestion control in a wireless communication network |
| US12613744B2 (en) * | 2021-03-12 | 2026-04-28 | Tejas Networks Limited | Optimizing RAN compute resources in a vertically scaled vRAN deployment |
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| US9924433B2 (en) | 2018-03-20 |
| KR101502141B1 (ko) | 2015-03-12 |
| US20150341839A1 (en) | 2015-11-26 |
| KR20140081504A (ko) | 2014-07-01 |
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