WO2014106390A1 - 一种下行功率参数的配置方法及装置 - Google Patents
一种下行功率参数的配置方法及装置 Download PDFInfo
- Publication number
- WO2014106390A1 WO2014106390A1 PCT/CN2013/082671 CN2013082671W WO2014106390A1 WO 2014106390 A1 WO2014106390 A1 WO 2014106390A1 CN 2013082671 W CN2013082671 W CN 2013082671W WO 2014106390 A1 WO2014106390 A1 WO 2014106390A1
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- WO
- WIPO (PCT)
- Prior art keywords
- terminal
- cell
- downlink power
- base station
- parameters
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims description 44
- 230000011664 signaling Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 1
- 238000001228 spectrum Methods 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
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/143—Downlink power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
- H04L5/0035—Resource allocation in a cooperative multipoint environment
-
- 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
- H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
-
- 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
-
- 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
-
- 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
- H04W88/02—Terminal devices
-
- 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 invention relates to the field of wireless communications, and in particular, to a method and an apparatus for configuring downlink power parameters.
- CoMP Coordinatd Multi-Point
- LTE-A Long Term Evolution-Advanced
- the JT (Joint Transmission) mechanism in the CoMP technology uses a method in which a primary cell and a cooperative cell jointly transmit a PDSCH (Physical Downlink Shared Channel).
- the DPS (Dynamic Point Selection) mechanism dynamically selects a single cell to transmit the PDSCH according to the channel conditions of the primary cell and the coordinated cell to the terminal.
- the embodiments of the present invention provide a method and a device for configuring downlink power parameters, which solve the problem of inaccurate estimation of the downlink channel estimation amplitude, thereby improving system performance.
- the embodiment of the invention provides a method for configuring a downlink power parameter, including:
- the base station configures downlink power parameters for the primary cell and the coordinated cell of the terminal in the coordinated multi-point CoMP set where the terminal is located;
- the base station notifies the terminal of the downlink power parameter.
- the base station is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located, including:
- the base station configures a power ratio between the same different symbols of the primary cell and the coordinated cell of the terminal.
- the downlink power parameter includes a cell-specific parameter P B ;
- the base station is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located, including:
- the base station configures the primary cell and the coordinated cell of the terminal to use the same P B .
- the base station configures downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located, including:
- the base station configures the primary cell and the coordinated cell of the terminal to use the same reference signal power parameter, the same CRS-containing OFDM symbol power parameter, and the same CRS-free parameter. OFDM symbol power parameters.
- the downlink power parameter includes a cell-specific parameter P B , a cell-specific parameter reference signal power PRS, and a terminal-specific parameter P A ;
- the base station is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located, including:
- the base station configures the primary cell and the coordinated cell of the terminal to use the same P B , P RS and P A .
- the downlink power parameter includes P B , P RS , and P A ;
- the base station is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located, including:
- the base station configures a downlink power parameter for the primary cell of the terminal, and configures a downlink power parameter for the coordinated cell of the terminal, and after selecting the used single cell, the terminal is used.
- the downlink power parameter of the primary cell is modified to the selected downlink power parameter of the used single cell.
- the downlink power parameter includes a cell-specific parameter P B , a cell-specific parameter reference signal power PRS, and a terminal-specific parameter P A ;
- the base station is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located, including:
- the base station configures independent downlink power parameters for the primary cell and the coordinated cell of the terminal.
- the base station notifying the terminal of the downlink power parameter includes:
- the base station sends a downlink power parameter of the used single cell selected under the DPS mechanism to the terminal.
- the embodiment of the present invention further provides a device for configuring a downlink power parameter, including: a base station power parameter configuration and a constraint unit, and a base station power parameter selection and signaling delivery unit, where:
- the base station power parameter configuration and the constraint unit are set to: a coordinated multipoint for the terminal
- the primary cell and the coordinated cell of the terminal in the CoMP set are configured with downlink power parameters; and the base station power parameter selection and signaling sending unit is configured to: notify the terminal of the downlink power parameter.
- the base station power parameter configuration and the constraint unit are configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located in the following manner: jointly transmitting JT in CoMP In the mechanism, the primary cell and the coordinated cell configuring the terminal use the same power ratio between different symbols.
- the downlink power parameter includes a cell-specific parameter P B ;
- the base station power parameter configuration and the constraining unit are configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located in the following manner:
- the primary cell and the coordinated cell configuring the terminal use the same P B .
- the base station power parameter configuration and the constraint unit are configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located in the following manner: dynamic point selection in the CoMP
- the primary cell and cooperation of the terminal when configuring the DPS mechanism The cell uses the same reference signal power parameter, the same CRS-containing OFDM symbol power parameter, and the same OFDM symbol power parameter that does not contain the CRS.
- the downlink power parameter includes a cell-specific parameter P B , a cell-specific parameter reference signal power PRS, and a terminal-specific parameter P A ;
- the base station power parameter configuration and the constraint unit are set to be located in the following manner
- the primary cell and the coordinated cell of the terminal in the CoMP set are configured with downlink power parameters:
- the primary cell and the coordinated cell configuring the terminal use the same P B , P RS , and P A ; or
- the independent primary power parameters are configured for the primary cell and the coordinated cell of the terminal.
- the base station power parameter selection and signaling sending unit is configured to notify the terminal of the downlink power parameter in the following manner:
- the base station power parameter configuration and the constraint unit configure respective independent downlink power parameters for the primary cell and the coordinated cell of the terminal, send downlink power parameters of the used single cell selected by the DPS mechanism to the Said terminal.
- the present invention configures downlink power parameters for both the primary cell and the coordinated cell in the CoMP set in which the terminal is located, and notifies the terminal of the downlink power parameter, which can solve the system performance problem caused by the terminal downlink channel estimation inaccuracy, thereby improving System performance.
- FIG. 1 is a flowchart of a method for configuring a downlink power parameter according to an embodiment of the present invention
- FIG. 2 is a structural diagram of an apparatus for configuring a downlink power parameter according to an embodiment of the present invention
- FIG. 3 is a structural diagram of a terminal according to an embodiment of the present invention. Preferred embodiment of the invention. The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.
- the configuration in the upper layer may not be 1, that is, and may not be equal, according to the definition of 1 ⁇ 2, when it is not equal to 1 ⁇ 2, it contains CRS (Cell-specific Reference Signals).
- the OFDM (Orthogonal Frequency Division Multiplexing) symbol is different from the power of the OFDM symbol without CRS; when using the CoMP JT/DPS mechanism, according to the 3rd Generation Partnership Project (3GPP) In the version 10/11 (R10/R11) standard, the terminal only knows the P A , P B and CRS power configuration values (ie, P RS ) of the camped cell, and the values of the camped cell and the coordinated cell are possible.
- the difference between the camping cell and the cooperating cell may be different.
- the downlink channel is used.
- UE-specific Reference Signals also known as DMRS (Demodulation Reference Signals)
- the downlink channel is used.
- the DMRS power is the same as the power of the OFDM symbol of the camping cell that does not contain the CRS, because the CRS-containing OFDM symbol of the camping cell does not contain CR.
- the power of the OFDM symbol of S is different, so the DMRS power is inconsistent with the power of the CRS-containing OFDM symbol of the camping cell, and because the camped cell and the coordinated cell may also be different, the DMRS power may also be related to the OFDM symbol of the coordinated cell. The power is inconsistent, which in turn leads to an increase in the amplitude error of the downlink channel estimation.
- the base station configures downlink power parameters for both the primary cell and the coordinated cell in the CoMP set where the terminal is located, so as to solve the problem that the downlink channel estimation amplitude is inaccurate.
- the method for configuring a downlink power parameter in this embodiment includes the following steps: Step 101: A base station configures downlink power parameters of each cell in a CoMP JT/DPS set where the terminal is located, including P B , P RS , and P A, etc.
- the base station configures the power ratios between different symbols of all cells in the CoMP JT set to be the same. If the JT mechanism is used, the base station configures all cells in the CoMP JT set to use the same P B , that is, to ensure that all cells in the CoMP JT set are the same, that is, the power ratios between different symbols of all cells are the same.
- the method of configuring the post-constraint first can be obtained.
- the downlink power parameter of each cell is configured first, and then the P B of the coordinated cell is kept the same as the P B of the camping cell, and the P B and the coordinated cell of the camping cell can also be made.
- the P B remains the same
- the method of configuring the power parameters of each cell under the same constraint condition of P B can also be taken.
- cells in the set can have the same CoMP JT P RS, P A, may be arranged different P RS, P A.
- the downlink power parameter of the single cell (the camping cell, that is, the primary cell) is configured, and the downlink power parameters of the coordinated cell in the JT set are not configured and restricted, so that the terminal cannot be downlinked according to the received camped cell.
- the power parameter performs accurate channel estimation on the data jointly transmitted by the multi-cell.
- the downlink power parameters of multiple cells are configured, and the cells in the set are increased.
- the base station configures and constrains the downlink power parameters of each cell in the CoMP DPS set.
- the base station can configure parameters first, then perform parameter relationship constraints, and can also configure parameters under parameter relationship constraints. This step can include the following operations:
- the base station configures and constrains all the coordinated cells in the CoMP DPS set to use the same downlink power parameters as the camped cell, including: the reference signal power parameter and the power parameters of different OFDM symbols are the same.
- the base station configures and constrains all coordinated cells within the CoMP DPS set to use the same downlink power parameters as the camped cells: P B , P RS and P A .
- the downlink power parameters of the single cell are configured, and the downlink power parameters of the coordinated cells in the DPS set are not configured and restricted.
- the DPS mechanism is used to schedule the coordinated cell to send downlink data
- the terminal cannot perform accurate channel estimation on the data sent by the coordinated cell according to the received downlink power parameter of the camped cell.
- the downlink power parameter of the multi-cell is configured, and the above constraint conditions are added to solve the problem that the channel estimation range is inaccurate.
- the base station configures downlink power parameters for the camped cell and the coordinated cell respectively, and after selecting the used single cell under the DPS mechanism, the base station changes the downlink power parameter of the camped cell of the terminal.
- the downlink power parameter of the single cell used for the DPS selection is the downlink power parameter of the single cell used for the DPS selection.
- the downlink power parameter of the single cell is configured, and the downlink power parameters of the coordinated cell in the DPS set are not configured and restricted.
- the terminal cannot perform accurate channel estimation on the data sent by the coordinated cell according to the received downlink power parameter of the camped cell.
- the downlink power parameter of the multi-cell is configured, and the above constraint conditions are added to solve the problem that the channel estimation range is inaccurate.
- the base station configures the downlink power parameters of each cell in the CoMP DPS set, and does not constrain the parameter relationship between the cells, and configures independent downlink power parameters.
- the downlink power parameters of the single cell are configured and notified, and the downlink power parameters of the coordinated cell in the DPS set are not configured, restricted, and notified.
- the DPS mechanism is used to schedule the coordinated cell to transmit downlink data
- the terminal cannot perform accurate channel estimation on the data sent by the coordinated cell according to the received power parameter of the camped cell.
- the downlink power parameter of the multi-cell is configured, and the notification operation selected below is added to solve the problem that the channel estimation range is inaccurate.
- the downlink power parameter of each cell may be configured first, and when the DPS cell is scheduled to send data, the following notification operation may be performed, or after the downlink power parameter of the DPS cell is configured (not all configured) The power parameter of the cell), immediately perform the following notification operation.
- Step 102 The base station selects and notifies the downlink power parameters of the terminal: P B , P RS , P A , and the like.
- the base station may select and notify the downlink power parameter of the resident cell of the terminal through RRC (Radio Resource Control) signaling.
- RRC Radio Resource Control
- the base station selects and notifies the downlink power parameter of the terminal, which may include the following operations:
- the base station selects a downlink power parameter of the camped cell, and notifies the terminal by using RRC signaling;
- the base station selects the downlink power parameter of the used single cell selected by the DPS for (3) in (2) in step 101, and notifies the terminal by using RRC signaling.
- Step 103 The terminal receives the PDSCH, the DMRS, and the downlink power parameters P B , P RS , and P A , etc. Information, and channel estimation using DMRS as a reference signal to obtain a downlink channel H.
- step 102 the terminal considers that it receives the downlink power parameters and data of the camped cell, and has performed correct parameter constraints, and uses these The power parameters are used for DMRS channel estimation.
- step 102 the terminal considers that the downlink power parameters and data of the camped cell are received, and the correct parameter constraints have been performed, and the power parameters are correctly used.
- DMRS channel estimation For the (1) under (2) in step 102, the terminal considers that the downlink power parameters and data of the camped cell are received, and the correct parameter constraints have been performed, and the power parameters are correctly used.
- the terminal considers that the downlink power parameters and data of the single cell selected by the DPS are received, and the correct parameter constraints have been performed, and the power is utilized.
- the parameters are correctly DMRS channel estimates.
- Step 104 The terminal demodulates the PDSCH data sent by the CoMP JT/DPS cell by using the downlink channel H estimated by the DMRS channel.
- the base station Since the base station has correctly configured, constrained, selected, and notified the downlink power parameters, the system performance problem caused by the terminal downlink channel estimation is not solved.
- the embodiment further provides a configuration device for downlink power parameters, including: a base station power parameter configuration and constraint unit 21, and a base station power parameter selection and signaling delivery unit 22, where:
- the base station power parameter configuration and constraint unit 21 is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located;
- the base station power parameter selection and signaling delivery unit 22 is configured to notify the terminal of the downlink power parameter.
- the base station power parameter configuration and constraint unit 21 is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located in the following manner:
- the downlink power parameter includes a cell specific parameter P B ;
- the base station power parameter configuration and constraint unit 21 is configured to configure downlink power parameters for both the primary cell and the coordinated cell of the terminal in the CoMP set in which the terminal is located in the following manner:
- the primary cell and the coordinated cell of the configuration terminal use the same P B .
- the base station power parameter configuration and constraint unit 21 is configured to configure downlink power parameters for the primary cell and the coordinated cell of the terminal in the CoMP set where the terminal is located in the following manner:
- the primary cell and the coordinated cell of the configuration terminal use the same reference signal power parameter, the same OFDM symbol power parameter containing CRS, and the same OFDM symbol power parameter without CRS. .
- the downlink power parameter includes a cell-specific parameter P B , a cell-specific parameter reference signal power P RS , and a terminal-specific parameter P A ;
- the base station power parameter configuration and constraint unit 21 is configured to configure downlink power parameters for both the primary cell and the coordinated cell of the terminal in the CoMP set in which the terminal is located in the following manner:
- the primary cell and the coordinated cell of the configuration terminal are the same.
- the downlink power parameter is configured; or, the primary power cell and the coordinated cell of the terminal are configured with independent downlink power parameters.
- the base station power parameter selection and signaling delivery unit 22 is configured to notify the terminal of the downlink power parameters in the following manner:
- the base station power parameter configuration and constraint unit 21 configures the independent downlink power parameters for the primary cell and the coordinated cell of the terminal.
- the downlink power parameter of the used single cell selected under the DPS mechanism is sent to the terminal.
- the embodiment further provides a terminal, including: a terminal power parameter receiving and channel estimating unit 31 and a downlink data demodulating unit 32, where:
- the terminal power parameter receiving and channel estimating unit 31 is configured to receive the PDSCH, the DMRS, and the lower Line power parameters P B , P RS and P A and other information, and channel estimation using DMRS as a reference signal to obtain a downlink channel H;
- the downlink data demodulating unit 32 is configured to demodulate the PDSCH data transmitted by the CoMP JT/DPS cell by using the downlink channel H estimated by the DMRS channel.
- modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or Multiple modules or steps are made into a single integrated circuit module. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.
- the method and apparatus of the embodiments of the present invention can solve the system performance problem caused by the terminal downlink channel estimation inaccuracy, thereby improving the performance of the system.
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Abstract
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/759,275 US20150358913A1 (en) | 2013-01-04 | 2013-08-30 | Method and apparatus for configuring downlink power parameters |
JP2015551102A JP6041999B2 (ja) | 2013-01-04 | 2013-08-30 | ダウンリンク電力パラメータの設定方法及び装置 |
EP13870353.3A EP2943021A4 (en) | 2013-01-04 | 2013-08-30 | METHOD AND APPARATUS FOR CONFIGURING DOWNLINK POWER PARAMETERS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201310001421.1 | 2013-01-04 | ||
CN201310001421.1A CN103916945B (zh) | 2013-01-04 | 2013-01-04 | 一种下行功率参数的配置方法及装置 |
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WO2014106390A1 true WO2014106390A1 (zh) | 2014-07-10 |
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PCT/CN2013/082671 WO2014106390A1 (zh) | 2013-01-04 | 2013-08-30 | 一种下行功率参数的配置方法及装置 |
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US (1) | US20150358913A1 (zh) |
EP (1) | EP2943021A4 (zh) |
JP (1) | JP6041999B2 (zh) |
CN (1) | CN103916945B (zh) |
WO (1) | WO2014106390A1 (zh) |
Cited By (1)
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US20160359380A1 (en) * | 2015-06-08 | 2016-12-08 | Ossia Inc. | Techniques for leveraging existing components of a device for wireless power transfer functionality |
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CN107302421B (zh) | 2016-04-08 | 2021-05-18 | 华为技术有限公司 | 一种功率配置方法及设备 |
CN107172634B (zh) * | 2017-05-03 | 2020-03-31 | 中国联合网络通信集团有限公司 | 无线网络优化方法及平台 |
JP7426252B2 (ja) * | 2020-02-12 | 2024-02-01 | ユニ・チャーム株式会社 | 推定装置、推定方法および推定プログラム |
CN112333697B (zh) * | 2020-10-28 | 2022-07-15 | 武汉虹旭信息技术有限责任公司 | Lte中物理下行共享信道的解码方法及装置 |
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- 2013-01-04 CN CN201310001421.1A patent/CN103916945B/zh active Active
- 2013-08-30 JP JP2015551102A patent/JP6041999B2/ja active Active
- 2013-08-30 WO PCT/CN2013/082671 patent/WO2014106390A1/zh active Application Filing
- 2013-08-30 EP EP13870353.3A patent/EP2943021A4/en not_active Withdrawn
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WO2016200981A1 (en) * | 2015-06-08 | 2016-12-15 | Ossia Inc. | Techniques for leveraging existing components of a device for wireless power transfer functionality |
US9997963B2 (en) | 2015-06-08 | 2018-06-12 | Ossia Inc. | Techniques for scheduling delivery of wireless power in wireless power delivery environments |
US10122221B2 (en) | 2015-06-08 | 2018-11-06 | Ossia Inc. | Techniques for selectively powering devices in wireless power delivery environments |
US10164484B2 (en) | 2015-06-08 | 2018-12-25 | Ossia Inc. | Techniques for leveraging existing components of a device for wireless power transfer functionality |
US10211686B2 (en) | 2015-06-08 | 2019-02-19 | Ossia Inc. | Techniques for reducing messaging requirements in wireless power delivery environments |
US10284025B2 (en) | 2015-06-08 | 2019-05-07 | Ossia Inc. | System diagnostics and health monitoring for wireless power delivery systems |
US10587154B2 (en) | 2015-06-08 | 2020-03-10 | Ossia Inc. | Techniques for scheduling delivery of wireless power in wireless power delivery environments |
US10658882B2 (en) | 2015-06-08 | 2020-05-19 | Ossia Inc. | Techniques for selectively powering devices in wireless power delivery environments |
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EP2943021A4 (en) | 2015-11-18 |
US20150358913A1 (en) | 2015-12-10 |
CN103916945B (zh) | 2018-02-16 |
EP2943021A1 (en) | 2015-11-11 |
CN103916945A (zh) | 2014-07-09 |
JP6041999B2 (ja) | 2016-12-14 |
JP2016506192A (ja) | 2016-02-25 |
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