WO2014183648A1 - 一种小小区功率控制方法和基站 - Google Patents
一种小小区功率控制方法和基站 Download PDFInfo
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- WO2014183648A1 WO2014183648A1 PCT/CN2014/077511 CN2014077511W WO2014183648A1 WO 2014183648 A1 WO2014183648 A1 WO 2014183648A1 CN 2014077511 W CN2014077511 W CN 2014077511W WO 2014183648 A1 WO2014183648 A1 WO 2014183648A1
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- Prior art keywords
- small cell
- transmit power
- power
- configure
- base station
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000005540 biological transmission Effects 0.000 claims abstract description 42
- 230000008859 change Effects 0.000 claims abstract description 21
- AYFVYJQAPQTCCC-GBXIJSLDSA-N L-threonine Chemical compound C[C@@H](O)[C@H](N)C(O)=O AYFVYJQAPQTCCC-GBXIJSLDSA-N 0.000 claims description 28
- 230000004913 activation Effects 0.000 claims description 25
- 230000003213 activating effect Effects 0.000 claims description 9
- 238000005562 fading Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000008186 active pharmaceutical agent Substances 0.000 claims 10
- DSCFFEYYQKSRSV-KLJZZCKASA-N D-pinitol Chemical compound CO[C@@H]1[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)[C@H]1O DSCFFEYYQKSRSV-KLJZZCKASA-N 0.000 description 8
- 238000004891 communication Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000009849 deactivation Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
- H04W52/244—Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
-
- 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
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/143—Downlink power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/386—TPC being performed in particular situations centralized, e.g. when the radio network controller or equivalent takes part in the power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment
Definitions
- the present invention relates to the field of communications, and in particular, to a small cell power control method and a base station. Background technique
- Heterogeneous Network networking is adopted.
- the architecture that is, deploying a small cell in the signal coverage of the macro cell to improve the quality of service and throughput of the hotspot area. 1 is a typical small cell scenario, in which two small cells, small cell 1 and small cell 2, have the same frequency, and the signal coverage covers the inter-frequency or the same frequency between the macro cell and the small cell of the two small cells.
- the main object of the present invention is to provide a small cell power control method and a base station to compete for low-cell interference to neighbor cells in an initial activation phase.
- a small cell power control method comprising:
- the small cell is configured with a transmit power that is less than the nominal value in the normal active state.
- the small cell state changes to: activate a small cell.
- the method for configuring the transmission power that is smaller than the rated value in the normal activation state is: a fixed configuration is a specific power value, and the power value is less than the rated maximum transmission power;
- the path loss between the UE and the small cell is estimated, and the transmit power is configured based on the path loss;
- the transmit power is configured based on the path loss of the UE, otherwise the transmit power is configured according to P_thre;
- the method further includes: adjusting the power of the reference signal and/or the downlink channel according to an adjustment of the maximum transmit power of the small cell configuration.
- the transmit power is also gradually increased until it is raised to the nominal value in the normal active state.
- the macro cell raises and adjusts the transmit power of the small cell
- the small cell and the neighboring neighboring area negotiate to adjust the lifting power
- the small cell adjusts the power to the normal transmit power; or, the preset centralized control unit raises and adjusts the transmit power of the small cell; or, the OM or the operation maintains the OM by the self-organizing network
- the entity raises and adjusts the transmit power of the small cell.
- the method further includes:
- the initial transmit power mode is configured to be in a normal mode, the small cell is directly configured to be a transmit power of a normal active state; if the initial transmit power mode is configured to gradually adjust a transmit power mode , when configuring the small cell initially, configure the small cell Less than the rated transmit power in the normal activation state.
- the method for configuring the initial transmit power mode is:
- the initial transmit power mode of the small cell is configured by the macro cell
- the small cell and the neighboring neighboring area negotiate to configure the initial transmit power mode of the small cell; or, the preset centralized control unit configures the initial transmit power mode of the small cell; or, the SON or OM entity pairs the small cell
- the initial transmit power mode is configured.
- the state change of the small cell is: deactivating a small cell;
- the transmitting power for the small cell configuration that is lower than the rated value in the normal activation state is: gradually reducing the transmission power of the small cell.
- the method further includes: configuring a reference signal and/or a power of the downlink channel according to a maximum transmit power of the small cell configuration;
- the reference signal includes a cell reference signal CRS, a channel state information reference signal CSI-RS, a primary synchronization signal PSS, a secondary synchronization signal SSS, and a positioning reference signal PRS;
- the downlink channel includes a physical broadcast channel PBCH, and a physical downlink shared channel physical downlink The shared channel PDSCH, the physical downlink control channel PDCCH, and the enhanced physical downlink control channel ePDCCH.
- the method further includes: notifying the transmit power of the RS of the UE base station; and/or notifying the transmit power ratio of the RS and the data channel of the UE base station.
- the method for notifying is: when the base station adjusts power, the base station performs corresponding notification to the UE;
- the base station when the base station performs corresponding notification to the UE, the base station further notifies the UE of a power variation rule, where the power variation rule includes a period and a step size information.
- An embodiment of the present invention provides a base station, where the base station includes:
- the detecting unit is configured to notify the configuration unit to perform configuration when the small cell status change is detected; and the configuration unit is configured to: when the notification sent by the detecting unit is received, configure the small cell to be smaller than the rated value in the normal active state. power.
- the small cell state changes to: activate a small cell.
- the configuration unit is configured to be fixedly configured to a specific power value, and the power value is small. At rated maximum transmit power;
- the transmit power is configured based on the path loss of the UE, otherwise the transmit power is configured according to P_thre;
- the configuration unit is configured to adjust the power of the reference signal and/or the downlink channel proportionally based on the adjustment of the maximum transmit power of the small cell configuration.
- the configuration unit is configured to gradually increase the transmit power after activating the small cell until the rated value is raised to the normal activated state.
- the configuration unit is configured to periodically adjust the transmit power according to the set step time; or, control the macro cell to perform lifting and adjusting on the transmit power of the small cell;
- control the small cell when the UE switches to the small cell, control the small cell to adjust the power to the normal transmit power; or control the preset centralized control unit to adjust the transmit power of the small cell; or, control the SON or OM entity to the small cell.
- the transmit power is adjusted for uplift.
- the configuration unit is configured to preset a plurality of initial transmit power modes, and if the initial transmit power mode is configured to be in a normal mode, the small cell is directly configured to be a transmit power of a normal active state;
- the initial transmit power mode is configured to gradually adjust the transmit power mode, and when the small cell is initially activated, the small cell is configured with a transmit power that is lower than the nominal value in the normal active state.
- the configuration unit is configured to control a macro cell to configure an initial transmit power mode of the small cell
- control small cell negotiates with the neighboring neighboring area to configure the initial transmit power mode of the small cell; or, the preset centralized control unit controls the initial transmit power mode of the small cell; Alternatively, the SON or OM entity is controlled to configure the initial transmit power mode of the small cell.
- the state change of the small cell is: deactivating a small cell;
- the device When the device configures the small cell to be smaller than the transmit power of the rated value in the normal active state, the device is configured to: gradually step up P to lower the transmit power of the small cell.
- the configuration unit is configured to configure a reference signal and/or a power of the downlink channel according to a maximum transmit power configured by the small cell;
- the reference signal includes a CRS, a CSI-RS, a PSS, an SSS, and a PRS; and the downlink channel includes a PBCH, a PDSCH, a PDCCH, and an ePDCCH.
- the configuration unit is configured to notify a transmit power of an RS of the UE base station; and/or,
- the configuration unit is configured to notify the UE correspondingly each time the power is adjusted;
- the UE when the UE is notified correspondingly, the UE is further notified of a power variation rule, where the power variation rule includes a period and a step information.
- the small cell power control technology in the embodiment of the present invention when the state of the small cell changes, configures the small cell to be smaller than the transmit power of the rated value in the normal active state, thereby effectively reducing the interference of the small cell to the neighboring cell in the initial activation phase, Avoid impact on neighboring performance.
- FIG. 1 is a structural diagram of a small cell network in the prior art
- FIG. 2 is a schematic flowchart of a small cell power control method according to an embodiment of the present invention
- FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention. detailed description
- a small cell power control method provided by an embodiment of the present invention may be implemented as shown in the figure.
- the operations shown in 2 include:
- Step 201 detecting a small cell state change
- Step 202 Configure the small cell to be smaller than the rated power in the normal activation state.
- the small cell state change may be activating a small cell, or may deactivating a small cell or the like.
- the small cell control entity such as the base station may configure the small cell with a transmission power smaller than the nominal value in the normal activation state. Since the smaller transmit power is configured, the interference of the newly activated small cell to the neighboring cell is reduced.
- the user equipment (UE) at the edge of the newly activated small cell can initiate measurement, and the measurement result is used to assist the positioning of the UE and the configuration coordination of the interference.
- UE user equipment
- the transmission power of the newly activated small cell can be gradually increased.
- the transmission power of the current small cell can be gradually reduced to narrow the signal coverage, and the serving UE can be switched to other small cells, such as a neighboring cell. While the transmission power of the current small cell is reduced, other small cells (e.g., neighboring cells) can increase the transmission power to increase the signal coverage.
- Celll and Cell2 are provided, Celll is in a dormant state, and Cell2 is in an active state.
- UE1 is close to Celll and UE2 is close to Cell2. Both UE1 and UE2 are served by Cell2.
- Embodiment 1 Power configuration scheme when small cell is activated
- Celll Activate Celll to configure Celll's initial maximum downlink transmit power Pinit, Pinit is less than Celll's rated maximum transmit power Pmax. Celll configures the transmit power of the downlink signal based on Pinit.
- Pinit can be configured using the following methods:
- the maximum downstream transmit power can be increased step by step until it is raised to the nominal value in the normal active state.
- the specific implementation can be:
- the macro cell raises and adjusts the transmit power of the Celll;
- the Celll adjusts the raised transmit power by negotiating with the surrounding neighboring area
- Celll adjusts the power to the normal transmit power.
- the information related to the power adjustment can be notified to the serving UE.
- Embodiment 2 Power allocation scheme when small cell is deactivated
- the transmit power of the small cell is gradually reduced to reduce the signal coverage, and the serving UE is switched to other small cells, such as a neighboring cell.
- the neighboring area can simultaneously increase the transmission power and increase the coverage.
- Celll after receiving the deactivation indication, Celll gradually reduces the transmission power and reduces the coverage.
- the specific method can be:
- the macro cell reduces the transmit power of the small cell and deactivates the small cell; or, the small cell negotiates to reduce the transmit power and deactivate the small cell; or, the UE switches in the small cell.
- the small cell is deactivated; or, the preset centralized control unit lowers the transmit power of the small cell, and deactivates the small cell.
- the transmit power of the small cell is down-regulated by the Self-Organized Network (SON) or the Operational Maintenance (OM) entity, and the small cell is activated.
- SON Self-Organized Network
- OM Operational Maintenance
- the information related to the power adjustment can be notified to the serving UE.
- the UE served by Celll will gradually switch to other small cells, such as: neighboring cells.
- Celll terminates the deactivation process and gradually increases the transmit power to expand the signal coverage.
- Celll gradually reduces the transmit power, when the transmit power is reduced to a preset threshold, and Celll serves
- Celll After the UE has switched to other small cells, Celll enters a sleep state.
- the small cell when the state of the small cell changes, the small cell can be configured with a transmission power smaller than the rated value in the normal activation state.
- the small cell state change is: Initially activating a small cell.
- the method for configuring the transmit power is: a fixed configuration is a specific power value, and the power value is less than a rated maximum transmit power;
- the transmit power is configured based on the path loss of the UE, otherwise the transmit power is configured according to P_thre;
- the power of the reference signal and/or the downlink channel can also be scaled based on the adjustment of the maximum transmit power of the small cell configuration.
- the transmit power can also be gradually increased until it is raised to the nominal value in the normal active state.
- the method for boosting the transmit power is: periodically increasing the transmit power according to a set step size;
- the macro cell raises and adjusts the transmit power of the small cell
- the small cell and the neighboring neighboring area negotiate to adjust the lifting power
- the small cell adjusts the power to the normal transmit power; or the preset centralized control unit adjusts the transmit power of the small cell; or, the SON or OM entity controls the small cell.
- the transmit power is raised and adjusted.
- a plurality of initial transmit power modes may be preset, if the initial transmit power mode is configured to be in a normal mode, the small cell is directly configured to be a transmit power of a normal active state; if the initial transmit power mode is configured to gradually adjust the transmit In the power mode, when the small cell is initially activated, the small cell is configured with a transmission power smaller than the rated value in the normal activation state.
- the method for configuring the initial transmit power mode is: configuring, by the macro cell, the initial transmit power mode of the small cell;
- the small cell and the neighboring neighboring area negotiate to configure the initial transmit power mode of the small cell; or, the preset centralized control unit configures the initial transmit power mode of the small cell; or, the SON or OM entity pairs the small cell
- the initial transmit power mode is configured.
- the small cell state change is: deactivating a small cell;
- the transmitting power for the small cell configuration that is lower than the rated value in the normal activation state is: gradually reducing the transmission power of the small cell.
- the power of the reference signal and/or the downlink channel may also be configured based on the maximum transmit power of the small cell configuration
- the reference signal may include a cell reference signal (CRS), a channel Channel State Information Reference Signal (CSI-RS), Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), Position Reference Signal (PSS);
- the downlink channel includes a physical broadcast channel (PBCH), a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), and an enhanced physical downlink control channel. (Enhanced Physical downlink control channel, ePDCCH).
- the method of the notification is: when the base station adjusts the power, the UE is notified correspondingly; or the base station notifies the UE of the power change rule when the UE performs the corresponding notification, and the power variation rule includes the period and the step information.
- the small cell power control device of the embodiment of the present invention may be a base station.
- the base station includes:
- the detecting unit 31 is configured to notify the configuration unit 32 to perform configuration when detecting a small cell state change
- the configuration unit 32 is configured to, when receiving the notification sent by the detecting unit 31, configure the small cell with a transmission power smaller than the rated value in the normal activation state.
- the small cell state change is: Initially activating a small cell.
- the configuration unit 32 is configured to be fixedly configured to a specific power value, where the power value is less than a rated maximum transmit power;
- the transmit power is configured based on the path loss of the UE, otherwise the transmit power is configured according to P_thre;
- the configuration unit 32 is configured to adjust the power of the reference signal and/or the downlink channel proportionally based on the adjustment of the maximum transmit power of the small cell configuration.
- the configuration unit 32 is configured to gradually increase the transmit power after activating the small cell until it is raised to a nominal value in a normal active state.
- the configuration unit 32 is configured to periodically adjust the transmit power according to the set step time when the transmit power is raised;
- control the small cell when the UE switches to the small cell, control the small cell to adjust the power to the normal transmit power; or control the preset centralized control unit to adjust the transmit power of the small cell; or, control the SON or OM entity to the small cell.
- the transmit power is adjusted for uplift.
- the configuration unit 32 is configured to preset a plurality of initial transmit power modes, and if the initial transmit power mode is configured to be in a normal mode, the small cell is directly configured to be a transmit power of a normal active state; The mode is configured to gradually adjust the transmit power mode, and when the small cell is initially activated, the small cell is configured with a transmit power that is lower than the rated value in the normal active state.
- the configuration unit 32 is configured to control the macro cell to configure an initial transmit power mode of the small cell
- control small cell negotiates with the surrounding neighboring area to configure the initial transmit power mode of the small cell; or, the preset centralized control unit controls the initial transmit power mode of the small cell; or, controls the SON or OM entity to the small cell.
- the initial transmit power mode is configured.
- the small cell state change is: deactivating a small cell;
- the configuration unit 32 is configured to gradually reduce the transmit power of the small cell when configuring the small cell to be smaller than the transmit power of the nominal value in the normal active state.
- the configuration unit 32 is configured to configure a reference signal and/or a power of the downlink channel according to a maximum transmit power configured by the small cell;
- the reference signal includes a CRS, a CSI-RS, a PSS, an SSS, and a PRS; and the downlink channel includes a PBCH, a PDSCH, a PDCCH, and an ePDCCH.
- the configuration unit 32 is configured to notify a transmit power of an RS of the UE base station; and/or to notify a transmit power ratio of an RS of the UE base station to a data channel.
- the configuration unit 32 is configured to notify the UE each time when the power is adjusted; or, when the UE is notified correspondingly, the UE is also notified of the power variation rule, where the power variation rule includes the period and the step information.
- the above detection unit and configuration unit can be implemented by hardware such as DSP, FPGA, other forms of baseband chip in the base station and/or software therein.
- the small cell power control technology of the embodiment of the present invention when the state of the small cell changes, configures the small cell to be smaller than the rated power of the conventional active state, Therefore, the interference of the small cell to the neighboring cell in the initial activation phase can be effectively reduced, and the performance of the neighboring cell is avoided as much as possible.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US14/891,439 US20160105853A1 (en) | 2013-05-17 | 2014-05-14 | Microcell power control method and base station |
JP2016513219A JP2016518795A (ja) | 2013-05-17 | 2014-05-14 | スモールセルパワー制御方法および基地局 |
EP14797743.3A EP2991414A4 (en) | 2013-05-17 | 2014-05-14 | MICROCELL PERFORMANCE CONTROL METHOD AND BASE STATION |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201310185899.4A CN104168636A (zh) | 2013-05-17 | 2013-05-17 | 一种小小区功率控制方法和装置 |
CN201310185899.4 | 2013-05-17 |
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WO2014183648A1 true WO2014183648A1 (zh) | 2014-11-20 |
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US (1) | US20160105853A1 (zh) |
EP (1) | EP2991414A4 (zh) |
JP (1) | JP2016518795A (zh) |
CN (1) | CN104168636A (zh) |
WO (1) | WO2014183648A1 (zh) |
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US11382046B2 (en) * | 2017-07-10 | 2022-07-05 | Panasonic Intellectual Property Corporation Of America | Power control method and communication apparatus |
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US11716694B2 (en) | 2019-01-31 | 2023-08-01 | Commscope Technologies Llc | Estimating and controlling transmit power of user equipment by a base station |
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JP2009130740A (ja) * | 2007-11-26 | 2009-06-11 | Softbank Bb Corp | 基地局及び基地局の送信電力制御方法 |
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US9037184B2 (en) * | 2010-03-25 | 2015-05-19 | Panasonic Intellectual Property Corporation Of America | Wireless communication system, femtocell base station and transmission power control method |
US9497714B2 (en) * | 2010-09-24 | 2016-11-15 | Qualcomm Incorporated | Power control for a network of access points |
JP5609759B2 (ja) * | 2011-04-27 | 2014-10-22 | パナソニック株式会社 | 基地局装置および通信制御方法 |
CN103688578A (zh) * | 2011-08-16 | 2014-03-26 | 富士通株式会社 | 功率控制方法、基站和终端设备 |
CN103024885B (zh) * | 2011-09-22 | 2016-08-03 | 华为技术有限公司 | 微小区基站的自适应功率调整 |
US10142848B2 (en) * | 2011-10-28 | 2018-11-27 | Qualcomm Incorporated | Method and apparatus for calibrating power in femtocell networks |
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CN101483910A (zh) * | 2008-12-25 | 2009-07-15 | 北京天碁科技有限公司 | 发送端设备及其功率控制方法 |
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CN104168636A (zh) | 2014-11-26 |
EP2991414A4 (en) | 2016-03-16 |
US20160105853A1 (en) | 2016-04-14 |
EP2991414A1 (en) | 2016-03-02 |
JP2016518795A (ja) | 2016-06-23 |
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