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 PDF

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Publication number
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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WIPO (PCT)
Prior art keywords
small cell
transmit power
power
configure
base station
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PCT/CN2014/077511
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English (en)
French (fr)
Inventor
赵亚军
徐汉青
莫林梅
Original Assignee
中兴通讯股份有限公司
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Filing date
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US14/891,439 priority Critical patent/US20160105853A1/en
Priority to JP2016513219A priority patent/JP2016518795A/ja
Priority to EP14797743.3A priority patent/EP2991414A4/en
Publication of WO2014183648A1 publication Critical patent/WO2014183648A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H04W52/244Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/08Testing, supervising or monitoring using real traffic
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473Wireless resource allocation based on the type of the allocated resource the resource being transmission power
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/06TPC algorithms
    • H04W52/14Separate analysis of uplink or downlink
    • H04W52/143Downlink power control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/242TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/38TPC being performed in particular situations
    • H04W52/386TPC being performed in particular situations centralized, e.g. when the radio network controller or equivalent takes part in the power control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/38TPC being performed in particular situations
    • H04W52/50TPC 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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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明公开了一种小小区功率控制方法和基站,其中方法包括:在检测到小小区状态变化时,为小小区配置小于常规激活状态下额定值的发射功率。

Description

一种小小区功率控制方法和基站 技术领域
本发明涉及通信领域, 具体涉及一种小小区功率控制方法和基站。 背景技术
随着 PC业务以及智能终端的广泛普及, 人们对无线通信体验特别是通信 速率的要求越来越高。 在长期演进( Long Term Evolution , LTE )标准及后续标 准演进中, 为了提升用户感知以及系统吞吐量, 尤其是为了提高热点地区的吞 吐量, 采用了异构网 (Heterogeneous Network, HetNet ) 的组网架构, 即在宏 小区(Macro cell )的信号覆盖范围内部署小小区 ( Small cell )以提升热点区域 的服务质量和吞吐量。 图 1为一个典型的小小区场景, 其中小小区 1和小小区 2这两个小小区同频, 信号覆盖范围覆盖两个小小区的宏小区和小小区之间为 异频或同频。
增加热点区域的小小区的数量是提高网络容量和降低覆盖空洞的有效机 制, 但是同时也带来了不少问题, 例如小小区间的相互干扰、 切换以及能耗等 问题。 通常, 小小区在初始激活阶段, 会对周边的同频邻区产生突发的干扰, 突发的干扰将会对邻区性能带来影响。 发明内容
有鉴于此, 本发明的主要目的在于提供一种小小区功率控制方法和基站, 以 P争低小小区在初始激活阶段对邻区的干扰。
为达到上述目的, 本发明实施例的技术方案是这样实现的:
一种小小区功率控制方法, 该方法包括:
在检测到小小区状态变化时,
为小小区配置小于常规激活状态下额定值的发射功率。 上述方案中, 所述小小区状态变化为: 激活小小区。
上述方案中, 所述配置小于常规激活状态下额定值的发射功率的方法为: 固定配置为特定功率值, 该功率值小于额定最大发射功率;
或者, 基于用户设备 UE测量并反馈的发现信号 DS接收强度, 再依据 DS 发射功率, 估计出 UE与小小区之间的路损, 基于路损配置发射功率;
或者, 基于 UE测量并反馈的 DS接收强度, 再依据 DS发射功率, 估计出 UE与小小区之间的路损;设置功率门限值 P_thre,若 UE的路损没有超过1^1^, 则基于 UE的路损配置发射功率, 否则按照 P_thre配置发射功率;
或者,若有多个 UE测量并反馈 DS的信号接收强度,计算每个 UE的路损; 设置功率门限 P_thre, 若 UE的路损没有超过1^11^, 则按照衰落最大的 UE 的路损配置发射功率, 否则按照 P_thre配置发射功率。
上述方案中, 该方法还包括: 基于小小区配置的最大发射功率的调整而比 例调整参考信号和 /或下行信道的功率。
激活小小区后, 还逐步提升所述发射功率, 直到提升至常规激活状态下的 额定值。
上述方案中, 提升所述发射功率为:
周期性按设定步长上调发射功率;
或者, 由宏小区对小小区的发射功率进行抬升调整;
或者, 由小小区与周围邻区协商调整抬升发射功率;
或者, 在 UE切换至小小区时, 小小区将功率调整为正常发射功率; 或者, 由预设的集中控制单元对小小区的发射功率进行抬升调整; 或者, 由自组织网络 SON或者操作维护 OM实体对小小区的发射功率进 行抬升调整。
上述方案中, 该方法还包括:
预先设置多种初始发射功率模式, 若所述初始发射功率模式配置为正常模 式, 则小小区激活后直接配置为正常激活状态的发射功率; 若所述初始发射功 率模式配置为逐步调整发射功率模式, 则在初始激活小小区时, 为小小区配置 小于常规激活状态下额定值的发射功率。
上述方案中, 配置所述初始发射功率模式的方法为:
由宏小区对小小区的初始发射功率模式进行配置;
或者, 由小小区与周围邻区协商对小小区初始发射功率模式进行配置; 或者, 由预设的集中控制单元对小小区的初始发射功率模式进行配置; 或者, 由 SON或者 OM实体对小小区的初始发射功率模式进行配置。 上述方案中, 所述小小区状态变化为: 去激活小小区;
所述为小小区配置小于常规激活状态下额定值的发射功率为: 逐步降低小 小区的发射功率。
上述方案中, 该方法还包括: 基于小小区配置的最大发射功率配置参考信 号和 /或下行信道的功率;
所述参考信号包括小区参考信号 CRS,信道状态信息参考信号 CSI-RS, 主 同步信号 PSS, 辅同步信号 SSS, 定位参考信号 PRS; 所述下行信道包括物理 广播信道 PBCH、 理下行共享信道物理下行共享信道 PDSCH、 物理下行控制信 道 PDCCH、 增强物理下行控制信道 ePDCCH。
上述方案中, 该方法还包括: 通知所述 UE基站的 RS的发射功率; 和 /或, 通知所述 UE基站的 RS与数据信道的发射功率比。
上述方案中, 所述通知的方法为: 基站每次调整功率时, 对 UE进行相应 通知;
或者, 基站对 UE进行相应通知时, 还通知 UE功率变化规律, 该功率变 化规律包括周期、 步长信息。
本发明实施例提供了一种基站, 所述基站包括:
检测单元, 配置为在检测到小小区状态变化时, 通知配置单元进行配置; 配置单元, 配置为接收到检测单元发来的通知时, 为所述小小区配置小于 常规激活状态下额定值的发射功率。
上述方案中, 所述小小区状态变化为: 激活小小区。
上述方案中, 所述配置单元, 配置为固定配置为特定功率值, 该功率值小 于额定最大发射功率;
或者, 基于 UE测量并反馈的 DS接收强度, 再依据 DS发射功率, 估计出 UE与小小区之间的路损, 基于路损配置发射功率;
或者, 基于 UE测量并反馈的 DS接收强度, 再依据 DS发射功率, 估计出 UE与小小区之间的路损;设置功率门限值 P_thre,若 UE的路损没有超过1^1^, 则基于 UE的路损配置发射功率, 否则按照 P_thre配置发射功率;
或者,若有多个 UE测量并反馈 DS的信号接收强度,计算每个 UE的路损; 设置功率门限 P_thre, 若 UE的路损没有超过1^11^, 则按照衰落最大的 UE 的路损配置发射功率, 否则按照 P_thre配置发射功率。
上述方案中, 所述配置单元, 配置为基于小小区配置的最大发射功率的调 整而比例调整参考信号和 /或下行信道的功率。
上述方案中, 所述配置单元, 配置为在激活小小区后, 逐步提升所述发射 功率, 直到提升至常规激活状态下的额定值。
上述方案中, 所述配置单元, 配置为周期性按设定步长上调发射功率; 或者, 控制宏小区对小小区的发射功率进行抬升调整;
或者, 控制小小区与周围邻区协商调整抬升发射功率;
或者, 在 UE切换至小小区时, 控制小小区将功率调整为正常发射功率; 或者, 控制预设的集中控制单元对小小区的发射功率进行抬升调整; 或者, 控制 SON或者 OM实体对小小区的发射功率进行抬升调整。
上述方案中, 所述配置单元, 配置为预先设置多种初始发射功率模式, 若 所述初始发射功率模式配置为正常模式, 则小小区激活后直接配置为正常激活 状态的发射功率; 若所述初始发射功率模式配置为逐步调整发射功率模式, 则 在初始激活小小区时, 为小小区配置小于常规激活状态下额定值的发射功率。
上述方案中, 所述配置单元, 配置为控制宏小区对小小区的初始发射功率 模式进行配置;
或者, 控制小小区与周围邻区协商对小小区初始发射功率模式进行配置; 或者, 控制预设的集中控制单元对小小区的初始发射功率模式进行配置; 或者, 控制 SON或者 OM实体对小小区的初始发射功率模式进行配置。 上述方案中, 所述小小区状态变化为: 去激活小小区;
所述装置在为小小区配置小于常规激活状态下额定值的发射功率时,用于: 逐步 P争低小小区的发射功率。
上述方案中, 所述配置单元, 配置为基于小小区配置的最大发射功率配置 参考信号和 /或下行信道的功率;
所述参考信号包括 CRS , CSI-RS, PSS, SSS, PRS; 所述下行信道包括 PBCH、 PDSCH、 PDCCH、 ePDCCH。
上述方案中, 所述配置单元, 配置为通知所述 UE基站的 RS的发射功率; 和 /或,
通知所述 UE基站的 RS与数据信道的发射功率比。
上述方案中, 所述配置单元, 配置为在每次调整功率时, 对 UE进行相应 通知;
或者, 对 UE进行相应通知时, 还通知 UE功率变化规律, 该功率变化规 律包括周期、 步长信息。
本发明实施例的小小区功率控制技术, 在小小区状态变化时, 为小小区配 置小于常规激活状态下额定值的发射功率, 因此能够有效降低小小区在初始激 活阶段对邻区的干扰, 尽量避免对邻区性能带来影响。 附图说明
图 1为现有技术的小小区网络结构图;
图 2为本发明实施例的小小区功率控制方法流程示意图;
图 3为本发明实施例基站组成结构示意图。 具体实施方式
下面结合附图及具体实施例对本发明再作进一步详细的说明。
总体而言, 本发明实施例提供的一种小小区功率控制方法, 可以执行如图 2所示的操作, 包括:
步骤 201 : 检测到小小区状态变化;
步骤 202: 为所述小小区配置小于常规激活状态下额定值的发射功率。 其中, 所述小小区状态变化可能是激活小小区,也可能是去激活小小区等。 在初始激活小小区时, 可以由基站等小小区控制实体为小小区配置小于常 规激活状态下额定值的发射功率。 由于配置了较小的发射功率, 因此减小了新 激活小小区对邻区的干扰。 另外, 处于新激活小小区边缘的用户设备(UE )可 以启动测量, 应用测量结果辅助 UE的定位和干扰的配置协调。
在完成小小区的激活后, 如果有预先设置要求或通信需要等, 还可以将新 激活小小区的发射功率逐步提升。
与上述的激活小小区相对应, 在小小区去激活时, 可以逐步降低当前小小 区的发射功率, 以缩小信号覆盖范围, 同时将服务的 UE切换到其它小小区, 如: 邻区。 在当前小小区的发射功率降低的同时, 其它小小区 (如: 邻区)则 可以增加发射功率, 以增大信号覆盖范围。
在实际应用中, 设有 Celll、 Cell2, Celll处于休眠状态, Cell2处于激活状 态。 UE1靠近 Celll , UE2靠近 Cell2。 UE1和 UE2均由 Cell2提供服务。
实施例 1: 小小区激活时的功率配置方案
激活 Celll , 配置 Celll初始最大下行发射功率 Pinit, Pinit小于 Celll额定 最大发射功率 Pmax。 Celll基于 Pinit配置下行信号的发射功率。
可以应用以下方法对 Pinit进行配置:
将 Pinit固定配置为某功率值, 该功率值小于 Celll额定最大发射功率; 或者, 基于 UE1测量并反馈的发现信号(Discovery signal, DS )信号接收 强度, 再依据 DS发射功率, 估计出 UE1与 Celll之间的路损 PL, 基于 PL及 其它信息配置合适的 Pinit。 例如 Pinit = α * PL+G。 其中, α〉=0, α为基于测 量得到的加权系数; G为考虑邻区干扰等因素的初始量;
或者, 若有多个 UE测量并反馈 DS的信号接收强度, 计算每个 UE的 PL; 设置门限1^11^, 若 UE的 PL没有超过 P_thre, 则按照衰落最大的 UE的 PL 配置 Pinit, 否则按照 P_thre配置 Pinit; 设置 P_thre时兼顾对邻区的干扰影响和 激活小区带来的增益。
激活 Celll 后, 可以逐步提升下行最大发射功率, 直到提升至常规激活状 态下的额定值。 具体实现方式可以为:
周期性按设定步长上调发射功率。例如,设周期为 T,功率调整步长为 Δ Ρ, 则 Pmax(n) = Pinit + η* Δ Ρ。 其中, Pmax(n)为第 n周期下行最大功率配置, Pmax(n)<Pmax , n〉= 1;
或者, 由宏小区对 Celll的发射功率进行抬升调整;
或者, 由 Celll与周围邻区协商调整抬升发射功率;
或者, 在 UE切换至 Celll时, Celll将功率调整为正常发射功率。
在 Celll上调发射功率的同时, Cell2等邻区可以同步协调以减小发射功率, 减小信号覆盖范围。
Celll调整发射功率时可以将涉及功率调整的信息通知给服务的 UE。
实施例 2: 小小区去激活时的功率配置方案
逐步降低小小区的发射功率, 以缩小信号覆盖范围, 同时将服务的 UE切 换到其它小小区, 如: 邻区。 邻区可以同步增加发射功率, 增大覆盖范围。
具体而言, Celll在接到去激活指示后,逐步降低发射功率,缩小覆盖范围。 具体方法可以为:
周期性按设定步长下调发射功率, 最终去激活小小区。 例如, 设周期为 T, 功率调整步长为 Δ Ρ, 则 Pmax(n) = P - η* Δ Ρ。 其中, Pmax(n)为第 n周期下行 最大功率配置, Pmax(n)<Pmax, n〉=l ;
周期性按设定步长下调发射功率, 可以在 Pmax(i)<=P_thre时, 直接去激活 小小区。
或者, 由宏小区对小小区的发射功率进行下调, 并去激活小小区; 或者, 由小小区与周围邻区协商下调发射功率, 并去激活小小区; 或者, 在小小区内的所有 UE切换至其它邻区时, 去激活小小区; 或者, 由预设的集中控制单元对小小区的发射功率进行下调, 并去激活小 小区;
或者, 由自组织网络 (Self-Organized Network , SON ) 或者操作维护 ( Operational Maintenance, OM ) 实体对小小区的发射功率进行下调, 并去激 活小小区。
在 Celll下调发射功率的同时, Cell2等邻区可以同步协调以增加发射功率, 增加其信号覆盖范围。
Celll调整发射功率时可以将涉及功率调整的信息通知给服务的 UE。
随着发射功率的降低, Celll服务的 UE将会逐渐切换到其它小小区, 如: 邻区。
在去激活过程中, 若对 Celll有新需求, 则 Celll终止去激活过程, 并逐步 提升发射功率, 以扩大信号覆盖范围。
最终, Celll进入休眠状态。 具体可以包括如下几种方案:
当 Celll服务的 UE完全切换到其它小小区后, Celll直接进入休眠状态; 或,
Celll逐步降低发射功率, 当发射功率降低到预设的门限, 且 Celll服务的
UE已经切换到其它小小区后, Celll进入休眠状态。
结合以上描述可见, 在小小区状态变化时, 可以为小小区配置小于常规激 活状态下额定值的发射功率。
所述小小区状态变化为: 初始激活小小区。
配置所述发射功率的方法为: 固定配置为特定功率值, 该功率值小于额定 最大发射功率;
或者, 基于 UE测量并反馈的 DS接收强度, 再依据 DS发射功率, 估计出 UE与小小区之间的路损, 基于路损配置发射功率;
或者, 基于 UE测量并反馈的 DS接收强度, 再依据 DS发射功率, 估计出 UE与小小区之间的路损;设置功率门限值 P_thre,若 UE的路损没有超过1^1^, 则基于 UE的路损配置发射功率, 否则按照 P_thre配置发射功率;
或者,若有多个 UE测量并反馈 DS的信号接收强度,计算每个 UE的路损; 设置功率门限 P_thre, 若 UE的路损没有超过1^11^, 则按照衰落最大的 UE 的路损配置发射功率, 否则按照 P_thre配置发射功率。
还可以基于小小区配置的最大发射功率的调整而比例调整参考信号和 /或 下行信道的功率。
激活小小区后, 还可以逐步提升所述发射功率, 直到提升至常规激活状态 下的额定值。
提升所述发射功率的方法为: 周期性按设定步长上调发射功率;
或者, 由宏小区对小小区的发射功率进行抬升调整;
或者, 由小小区与周围邻区协商调整抬升发射功率;
或者, 在 UE切换至小小区时, 小小区将功率调整为正常发射功率; 或者, 由预设的集中控制单元对小小区的发射功率进行抬升调整; 或者, 由 SON或者 OM实体对小小区的发射功率进行抬升调整。
还可以预先设置多种初始发射功率模式, 若所述初始发射功率模式配置为 正常模式, 则小小区激活后直接配置为正常激活状态的发射功率; 若所述初始 发射功率模式配置为逐步调整发射功率模式, 则在初始激活小小区时, 为小小 区配置小于常规激活状态下额定值的发射功率。
配置初始发射功率模式的方法为: 由宏小区对小小区的初始发射功率模式 进行配置;
或者, 由小小区与周围邻区协商对小小区初始发射功率模式进行配置; 或者, 由预设的集中控制单元对小小区的初始发射功率模式进行配置; 或者, 由 SON或者 OM实体对小小区的初始发射功率模式进行配置。 所述小小区状态变化为: 去激活小小区;
所述为小小区配置小于常规激活状态下额定值的发射功率为: 逐步降低小 小区的发射功率。
还可以基于小小区配置的最大发射功率配置参考信号和 /或下行信道的功 率;
所述参考信号可以包括小区参考信号(Cell reference signal, CRS ), 信道 状态信息参考信号 ( Channel State Information reference signal, CSI-RS ), 主同 步信号 ( Primary Synchronization Signal , PSS ) , 辅同步信号 ( Secondary Synchronization Signal, SSS ), 定位参考信号 ( Position Reference Signal, PRS ); 所述下行信道包括物理广播信道(Physical Broadcast Channel, PBCH )、 理下行 共享信道物理下行共享信道( Physical Downlink Shared Channel, PDSCH )、 物 理下行控制信道(Physical downlink control channel, PDCCH )、 增强物理下行 控制信道 ( Enhanced Physical downlink control channel, ePDCCH )。
还可以通知所述 UE基站的 RS的发射功率; 和 /或,
通知所述 UE基站的 RS与数据信道的发射功率比。
所述通知的方法为: 基站每次调整功率时, 对 UE进行相应通知; 或者, 基站对 UE进行相应通知时, 还通知 UE功率变化规律, 该功率变 化规律包括周期、 步长信息。
基于上述操作, 本发明实施例的小小区功率控制装置可以为基站, 如图 3 所示, 所述基站包括:
检测单元 31 , 配置为在检测到小小区状态变化时, 通知配置单元 32进行 配置;
配置单元 32, 配置为接收到检测单元 31发来的通知时, 为所述小小区配 置小于常规激活状态下额定值的发射功率。
所述小小区状态变化为: 初始激活小小区。
所述配置单元 32, 配置为固定配置为特定功率值, 该功率值小于额定最大 发射功率;
或者, 基于 UE测量并反馈的 DS接收强度, 再依据 DS发射功率, 估计出 UE与小小区之间的路损, 基于路损配置发射功率;
或者, 基于 UE测量并反馈的 DS接收强度, 再依据 DS发射功率, 估计出 UE与小小区之间的路损;设置功率门限值 P_thre,若 UE的路损没有超过1^1^, 则基于 UE的路损配置发射功率, 否则按照 P_thre配置发射功率;
或者,若有多个 UE测量并反馈 DS的信号接收强度,计算每个 UE的路损; 设置功率门限 P_thre, 若 UE的路损没有超过1^11^, 则按照衰落最大的 UE 的路损配置发射功率, 否则按照 P_thre配置发射功率。
所述配置单元 32, 配置为基于小小区配置的最大发射功率的调整而比例调 整参考信号和 /或下行信道的功率。
所述配置单元 32, 配置为在激活小小区后, 逐步提升所述发射功率, 直到 提升至常规激活状态下的额定值。
所述配置单元 32, 配置为在提升所述发射功率时, 周期性按设定步长上调 发射功率;
或者, 控制宏小区对小小区的发射功率进行抬升调整;
或者, 控制小小区与周围邻区协商调整抬升发射功率;
或者, 在 UE切换至小小区时, 控制小小区将功率调整为正常发射功率; 或者, 控制预设的集中控制单元对小小区的发射功率进行抬升调整; 或者, 控制 SON或者 OM实体对小小区的发射功率进行抬升调整。
所述配置单元 32, 配置为预先设置多种初始发射功率模式, 若所述初始发 射功率模式配置为正常模式, 则小小区激活后直接配置为正常激活状态的发射 功率; 若所述初始发射功率模式配置为逐步调整发射功率模式, 则在初始激活 小小区时, 为小小区配置小于常规激活状态下额定值的发射功率。
所述配置单元 32, 配置为控制宏小区对小小区的初始发射功率模式进行配 置;
或者, 控制小小区与周围邻区协商对小小区初始发射功率模式进行配置; 或者, 控制预设的集中控制单元对小小区的初始发射功率模式进行配置; 或者, 控制 SON或者 OM实体对小小区的初始发射功率模式进行配置。 所述小小区状态变化为: 去激活小小区;
所述配置单元 32, 配置为在为小小区配置小于常规激活状态下额定值的发 射功率时, 逐步降低小小区的发射功率。
所述配置单元 32, 配置为基于小小区配置的最大发射功率配置参考信号和 /或下行信道的功率; 所述参考信号包括 CRS , CSI-RS, PSS, SSS, PRS; 所述下行信道包括 PBCH、 PDSCH、 PDCCH、 ePDCCH。
所述配置单元 32, 配置为通知所述 UE基站的 RS的发射功率; 和 /或, 通知所述 UE基站的 RS与数据信道的发射功率比。
所述配置单元 32, 配置为在每次调整功率时, 对 UE进行相应通知; 或者, 对 UE进行相应通知时, 还通知 UE功率变化规律, 该功率变化规 律包括周期、 步长信息。
上述检测单元及配置单元均可以由基站中的 DSP、 FPGA、 其他形式的基 带芯片等硬件和 /或其中的软件实现。
综上所述可见, 无论是方法还是能够实现该方法的装置, 本发明实施例的 小小区功率控制技术, 在小小区状态变化时, 为小小区配置小于常规激活状态 下额定值的发射功率,因此能够有效降低小小区在初始激活阶段对邻区的干扰, 尽量避免对邻区性能带来影响。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保护范 围。

Claims

权利要求书
1、 一种小小区功率控制方法, 该方法包括:
在检测到小小区状态变化时,
为小小区配置小于常规激活状态下额定值的发射功率。
2、 根据权利要求 1所述的方法, 其中, 所述小小区状态变化为: 激活小小 区。
3、根据权利要求 2所述的方法, 其中, 所述配置小于常规激活状态下额定 值的发射功率的方法为:
固定配置为特定功率值, 该功率值小于额定最大发射功率;
或者, 基于用户设备 UE测量并反馈的发现信号 DS接收强度, 再依据 DS 发射功率, 估计出 UE与小小区之间的路损, 基于路损配置发射功率;
或者, 基于 UE测量并反馈的 DS接收强度, 再依据 DS发射功率, 估计出 UE与小小区之间的路损;设置功率门限值 P_thre,若 UE的路损没有超过1^1^, 则基于 UE的路损配置发射功率, 否则按照 P_thre配置发射功率;
或者,若有多个 UE测量并反馈 DS的信号接收强度,计算每个 UE的路损; 设置功率门限 P_thre, 若 UE的路损没有超过1^11^, 则按照衰落最大的 UE 的路损配置发射功率, 否则按照 P_thre配置发射功率。
4、 根据权利要求 2或 3所述的方法, 其中, 该方法还包括: 基于小小区配 置的最大发射功率的调整而比例调整参考信号和 /或下行信道的功率。
5、 根据权利要求 2或 3所述的方法, 其中, 所述激活小小区之后, 所述方 法还包括: 逐步提升所述发射功率, 直到提升至常规激活状态下的额定值。
6、 根据权利要求 5所述的方法, 其中, 提升所述发射功率为:
周期性按设定步长上调发射功率;
或者, 由宏小区对小小区的发射功率进行抬升调整;
或者, 由小小区与周围邻区协商调整抬升发射功率;
或者, 在 UE切换至小小区时, 小小区将功率调整为正常发射功率; 或者, 由预设的集中控制单元对小小区的发射功率进行抬升调整; 或者, 由自组织网络 SON或者操作维护 OM实体对小小区的发射功率进 行抬升调整。
7、 根据权利要求 2所述的方法, 其中, 该方法还包括:
预先设置多种初始发射功率模式,
若所述初始发射功率模式配置为正常模式, 则小小区激活后直接配置为正 常激活状态的发射功率;
若所述初始发射功率模式配置为逐步调整发射功率模式, 则在初始激活小 小区时, 为小小区配置小于常规激活状态下额定值的发射功率。
8、根据权利要求 7所述的方法, 其中, 配置所述初始发射功率模式的方法 为:
由宏小区对小小区的初始发射功率模式进行配置;
或者, 由小小区与周围邻区协商对小小区初始发射功率模式进行配置; 或者, 由预设的集中控制单元对小小区的初始发射功率模式进行配置; 或者, 由 SON或者 OM实体对小小区的初始发射功率模式进行配置。
9、 根据权利要求 1所述的方法, 其中,
所述小小区状态变化为: 去激活小小区;
所述为小小区配置小于常规激活状态下额定值的发射功率为: 逐步降低小 小区的发射功率。
10、 根据权利要求 2或 9所述的方法, 其中, 该方法还包括: 基于小小区 配置的最大发射功率配置参考信号和 /或下行信道的功率;
所述参考信号包括小区参考信号 CRS,信道状态信息参考信号 CSI-RS, 主 同步信号 PSS, 辅同步信号 SSS, 定位参考信号 PRS; 所述下行信道包括物理 广播信道 PBCH、 理下行共享信道物理下行共享信道 PDSCH、 物理下行控制信 道 PDCCH、 增强物理下行控制信道 ePDCCH。
11、 根据权利要求 2或 9所述的方法, 其中, 该方法还包括:
通知所述 UE基站的 RS的发射功率; 和 /或, 通知所述 UE基站的 RS与数据信道的发射功率比。
12、 根据权利要求 11所述的方法, 其中, 所述通知为:
基站每次调整功率时, 对 UE进行相应通知;
或者, 基站对 UE进行相应通知时, 还通知 UE功率变化规律, 该功率变 化规律包括周期、 步长信息。
13、 一种基站, 所述基站包括:
检测单元, 配置为在检测到小小区状态变化时, 通知配置单元进行配置; 配置单元, 配置为接收到检测单元发来的通知时, 为所述小小区配置小于 常规激活状态下额定值的发射功率。
14、 根据权利要求 13所述的基站, 其中, 所述小小区状态变化为: 激活小 小区。
15、 根据权利要求 14所述的基站, 其中,
所述配置单元, 配置为在配置所述发射功率时, 固定配置为特定功率值, 该功率值小于额定最大发射功率;
或者, 基于 UE测量并反馈的 DS接收强度, 再依据 DS发射功率, 估计出 UE与小小区之间的路损, 基于路损配置发射功率;
或者, 基于 UE测量并反馈的 DS接收强度, 再依据 DS发射功率, 估计出 UE与小小区之间的路损;设置功率门限值 P_thre,若 UE的路损没有超过1^1^, 则基于 UE的路损配置发射功率, 否则按照 P_thre配置发射功率;
或者,若有多个 UE测量并反馈 DS的信号接收强度,计算每个 UE的路损; 设置功率门限 P_thre, 若 UE的路损没有超过1^11^, 则按照衰落最大的 UE 的路损配置发射功率, 否则按照 P_thre配置发射功率。
16、 根据权利要求 14或 15所述的基站, 其中, 所述配置单元, 配置为基 于小小区配置的最大发射功率的调整而比例调整参考信号和 /或下行信道的功 率。
17、 根据权利要求 14或 15所述的基站, 其中, 所述配置单元, 配置为在 激活小小区后,逐步提升所述发射功率, 直到提升至常规激活状态下的额定值。
18、 根据权利要求 17所述的基站, 其中,
所述配置单元, 配置为所述装置在提升所述发射功率时, 周期性按设定步 长上调发射功率;
或者, 控制宏小区对小小区的发射功率进行抬升调整;
或者, 控制小小区与周围邻区协商调整抬升发射功率;
或者, 在 UE切换至小小区时, 控制小小区将功率调整为正常发射功率; 或者, 控制预设的集中控制单元对小小区的发射功率进行抬升调整; 或者, 控制 SON或者 OM实体对小小区的发射功率进行抬升调整。
19、 根据权利要求 14所述的基站, 其中, 所述配置单元, 配置为预先设置 多种初始发射功率模式, 若所述初始发射功率模式配置为正常模式, 则小小区 激活后直接配置为正常激活状态的发射功率; 若所述初始发射功率模式配置为 逐步调整发射功率模式, 则在初始激活小小区时, 为小小区配置小于常规激活 状态下额定值的发射功率。
20、 根据权利要求 19所述的基站, 其中, 所述配置单元, 配置为控制宏小 区对小小区的初始发射功率模式进行配置;
或者, 控制小小区与周围邻区协商对小小区初始发射功率模式进行配置; 或者, 控制预设的集中控制单元对小小区的初始发射功率模式进行配置; 或者, 控制 SON或者 OM实体对小小区的初始发射功率模式进行配置。
21、 根据权利要求 13所述的基站, 其中,
所述小小区状态变化为: 去激活小小区;
所述装置在为小小区配置小于常规激活状态下额定值的发射功率时,用于: 逐步 P争低小小区的发射功率。
22、 根据权利要求 14或 21所述的基站, 其中, 所述配置单元, 配置为基 于小小区配置的最大发射功率配置参考信号和 /或下行信道的功率;
所述参考信号包括 CRS , CSI-RS, PSS, SSS, PRS; 所述下行信道包括 PBCH、 PDSCH、 PDCCH、 ePDCCH。
23、 根据权利要求 15或 22所述的基站, 其中, 所述配置单元, 配置为通 知所述 UE基站的 RS的发射功率; 和 /或,
通知所述 UE基站的 RS与数据信道的发射功率比。
24、 根据权利要求 23所述的基站, 其中, 所述配置单元, 配置为在每次调 整功率时, 对 UE进行相应通知;
或者, 对 UE进行相应通知时, 还通知 UE功率变化规律, 该功率变化规 律包括周期、 步长信息。
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