WO2013053230A1 - 动态控制内环功率的方法及ue - Google Patents

动态控制内环功率的方法及ue Download PDF

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Publication number
WO2013053230A1
WO2013053230A1 PCT/CN2012/075464 CN2012075464W WO2013053230A1 WO 2013053230 A1 WO2013053230 A1 WO 2013053230A1 CN 2012075464 W CN2012075464 W CN 2012075464W WO 2013053230 A1 WO2013053230 A1 WO 2013053230A1
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Prior art keywords
frequency
cell
frequency value
target cell
inter
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PCT/CN2012/075464
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English (en)
French (fr)
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于铁栓
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中兴通讯股份有限公司
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Publication of WO2013053230A1 publication Critical patent/WO2013053230A1/zh

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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
    • H04W52/38—TPC being performed in particular situations
    • H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a WCDMA (Wideband Code Division Multiple Access) system, a method for dynamically controlling inner loop power when a mobile phone moves between cells of different carrier frequencies, and a UE (User equipment, user terminal).
  • WCDMA Wideband Code Division Multiple Access
  • UE User equipment, user terminal
  • Power control is one of the key technologies in WCDMA.
  • the purpose of power control is to overcome the near-far effect.
  • the near-far effect phenomenon means that if there is no power control, one UE close to the base station can block the entire cell, and the UE signal far from the base station will be "flooded".
  • the signal arrives at the base station, which will have different attenuation, resulting in a base station closer to the UE.
  • the incoming signal is strong, and the signal received by the farther base station is weak, and thus the strength of the signals received by the base station is greatly different.
  • WCDMA is an intra-frequency receiving system, the far weak signal may not be despread after reaching the base station, causing the weak signal to be "flooded” in the strong signal and not working properly.
  • the power control includes the inner loop power control and the outer loop power control.
  • the outer loop power control is implemented between the SRNC (Serving Radio Network Controller) and the base station, and is used to maintain the radio link at a certain level. That is, the SIR (Signal to Interference Ratio) target value is adjusted to maintain the BLER (Block Error Rate) of the radio link at a certain level.
  • the inner loop power control is done between the UE and the base station.
  • the inner loop power control is divided into downlink inner loop power control and uplink inner loop power control.
  • the control end of the downlink inner loop power control is the UE, and the executor is the base station, that is, the UE sends a power control command to the base station according to the actual quality measurement result of the downlink, and the base station adjusts the downlink transmit power according to the feedback;
  • the control end of the power control is the base station, and the execution end is the UE, that is, the UE adjusts the uplink transmit power according to the feedback given by the base station through the downlink.
  • the existing power control method is applicable to a situation in which the UE changes distance from the base station during the movement, a situation in which an obstacle is blocked, and a soft handover when moving between cells.
  • the base station and its own transmit power are adjusted through interaction with the network to maintain the wireless link at a normal level.
  • the main purpose of the present invention is to provide a method for dynamically controlling inner loop power and a UE, which can reduce network load and improve user experience when the UE performs inter-frequency handover.
  • the present invention provides a method for dynamically controlling inner loop power, including: receiving, by a UE, an inter-frequency handover command sent by an RRC;
  • Parsing the inter-frequency handover command extracting the frequency value of the target cell, and extracting the frequency value of the target cell according to the frequency value of the target cell, the frequency value of the currently registered cell, and the radio frequency parameter corresponding to the different frequency band in the preset NV, Power is controlled.
  • the inner loop power is controlled according to the frequency value of the target cell, the frequency value of the currently registered cell, and the radio frequency parameter corresponding to the different frequency band in the preset NV:
  • the radio frequency parameter matching the frequency value of the target cell is derived from the NV;
  • the method further comprises:
  • the UE When the frequency value of the target cell is the same as the frequency value of the currently registered cell, the UE does not adjust the transmission power.
  • the method further includes: receiving, by the UE, a different cell signal by using the rake receiver; and when the quality of the carrier signal of the current registration cell is lower than a predetermined threshold
  • the UE reports an inter-frequency measurement report to the RRC, and the RRC sends the inter-frequency handover command to the UE according to the inter-frequency measurement report.
  • the method further includes: setting radio frequency parameters corresponding to different frequency bands in the NV.
  • the present invention also provides a UE that dynamically controls inner loop power, including:
  • a receiving module configured to receive an inter-frequency handover command sent by the RRC
  • a parsing module configured to parse the inter-frequency handover command, and extract a frequency value of the target cell
  • the power control module is configured to control the inner loop power according to the frequency value of the target cell, the frequency value of the currently registered cell, and the radio frequency parameter corresponding to the different frequency band in the preset NV.
  • the power control module further includes:
  • a comparing unit configured to compare a frequency value of the target cell with a frequency value of a currently registered cell; and a deriving unit, where the frequency value used by the target cell is different from the frequency value of the currently registered cell, and is derived from the NV a radio frequency parameter that matches a frequency value of the target cell;
  • an adjusting unit configured to adjust, according to the radio frequency parameter that matches the frequency value of the target cell, the transmit power of the UE.
  • the adjusting unit is further configured to not adjust the transmit power of the UE when the frequency value of the target cell is the same as the frequency value of the currently registered cell.
  • the receiving module is further configured to receive and process different small through the RAKE receiver. a zone signal; when the carrier signal quality of the currently registered cell is lower than a predetermined threshold, reporting the inter-frequency measurement report to the RRC.
  • the foregoing UE further includes:
  • a setting module configured to set radio frequency parameters corresponding to different frequency bands in the NV.
  • the method for dynamically controlling the inner loop power and the UE proposed by the present invention when the UE performs inter-frequency handover, according to different transmission frequencies of the target cell, the UE configures radio frequency transmission power by using a set of parameters suitable for the carrier frequency of the target cell. Therefore, the radio frequency transmit power suitable for the carrier frequency of the target cell is dynamically adjusted, thereby realizing that the network load is minimized and the standby time of the mobile phone is extended without affecting the user experience.
  • FIG. 1 is a schematic flowchart of a method for dynamically controlling inner loop power according to the present invention
  • FIG. 2 is a frequency value of a target cell, a frequency value of a currently registered cell, and a preset according to an embodiment of the method for dynamically controlling inner loop power according to the present invention
  • FIG. 3 is a schematic flow chart of another embodiment of a method for dynamically controlling inner loop power according to the present invention
  • FIG. 4 is a schematic structural diagram of a UE for dynamically controlling inner loop power according to the present invention
  • FIG. 5 is a schematic diagram of a UE for dynamically controlling inner loop power according to the present invention
  • - a schematic structural diagram of a power control module in the embodiment
  • FIG. 6 is a schematic structural diagram of another embodiment of a UE for dynamically controlling inner loop power according to the present invention.
  • the solution of the embodiment of the present invention is mainly: when the UE performs inter-frequency handover, according to different transmission frequencies of the cell currently registered by the mobile phone, the UE adopts a set of radio frequency parameters suitable for the current carrier frequency.
  • the UE When the UE is in a different cell, even if the UE is in the same location of the signal strength, the power transmitted by the UE to the base station is different, thereby dynamically adjusting the UE's transmit power to an optimal carrier frequency for the currently registered cell. Value to reduce network load and extend the phone's standby time.
  • the inter-frequency handover of the UE is divided into a hard handover and a soft handover, and the inter-frequency handover involved in the embodiment of the present invention is one of hard handover.
  • an embodiment of the present invention provides a method for dynamically controlling inner loop power, and the method includes the following steps:
  • Step S101 The UE receives an inter-frequency handover command sent by the RRC.
  • the power control belongs to the uplink inner loop power control, and the UE processes the semaphores from different cells by using a rake receiver. For these semaphores, it is determined that the signal quality of the currently registered cell carrier frequency is low.
  • the UE informs the RRC (Radio Resource Control) of the network side that the network side RRC initiates the inter-frequency hard handover, and notifies the UE to measure the inter-frequency cell signal, and the UE sets the inter-frequency measurement information according to the prior agreement.
  • the measurement control report format is reported to the RRC, and the RRC analyzes and judges the inter-frequency measurement report reported by the UE.
  • the RRC determines that the inter-frequency cell signal quality is higher than the current registered cell carrier frequency signal quality threshold, the RRC sends a different message to the UE.
  • the frequency hard handover command notifies the UE to switch to the cell of the specified frequency.
  • step S102 the inter-frequency handover command is parsed, and the frequency value of the target cell is extracted therefrom.
  • the target cell refers to a cell to be switched with respect to the currently registered cell before the inter-frequency handover of the UE, when the UE performs After the inter-frequency handover, the target cell becomes the currently registered cell.
  • the UE After receiving the inter-frequency handover command sent by the RRC, the UE parses the inter-frequency handover command, and extracts the frequency value of the cell to be handed over as the frequency value of the target cell.
  • Step S103 Control the inner loop power according to the frequency value of the target cell, the frequency value of the currently registered cell, and the radio frequency parameters corresponding to different frequency bands in the preset NV (Non-Volatile, non-volatile storage area); Specifically, the UE compares the frequency value of the parsed target cell with the frequency value of the currently registered cell parsed from the system broadcast message received in advance, and if the frequency information does not change, no processing is performed; The information is changed, and the UE is required to perform the inter-frequency handover. Then, according to the frequency value of the target cell, the preset radio frequency parameter suitable for the frequency value of the target cell is derived from the NV of the UE, and then the UE is automatically adjusted according to the radio frequency parameter. The power transmits the corresponding modulated signal through the adjusted transmit power, thereby realizing the reduction of the network load and extending the standby time of the mobile phone without affecting the user experience.
  • NV Non-Volatile, non-volatile storage area
  • radio frequency parameters suitable for the corresponding frequency band are preset and stored in the NV of the UE for configuration and use of related parameters, and the difference between the radio frequency parameters is mainly reflected in The transmit power when the UE is expected to work.
  • step S103 further includes the following steps:
  • Step S1031 Compare the frequency value of the target cell with the frequency value of the currently registered cell; if the frequency value of the target cell is different from the frequency value of the currently registered cell, go to step S1032; otherwise, go to step S1034.
  • Step S1032 Deriving radio frequency parameters matching the frequency values of the target cell from the NV; and proceeding to the next step.
  • Step S1033 Adjust the transmit power of the UE according to the radio frequency parameter that matches the frequency value of the target cell.
  • Step S1034 The UE does not adjust the transmit power.
  • the UE when the UE performs inter-frequency handover, the UE configures radio frequency transmission power by using a set of parameters suitable for the carrier frequency of the target cell according to the transmission frequency of the target cell, thereby dynamically adjusting the radio frequency suitable for the carrier frequency of the target cell.
  • the transmit power enables the network load to be minimized and the standby time of the mobile phone to be extended without affecting the user experience.
  • another embodiment of the present invention provides a method for dynamically controlling the power of the inner loop.
  • the method further includes the following steps: Step S100, setting radio frequency parameters corresponding to different frequency bands in the NV.
  • the power control method in the foregoing embodiment is premise that the radio frequency parameters applicable to different frequency bands are preset and stored in the NV of the UE, and the setting of the radio frequency parameter may be set by the UE itself. It can also be set by other network elements and saved locally in the UE.
  • the radio frequency parameters applicable to different frequency bands are first set by the UE and stored locally.
  • the radio frequency parameters suitable for the current frequency band are derived from the NV for transmitting power. Adjustment.
  • the UE when the UE performs inter-frequency handover, according to different transmission frequencies of the currently registered cell, the UE configures radio frequency transmission power by using a set of parameters suitable for the current carrier frequency.
  • the power transmitted by the UE to the base station is different even if the UE is in the same location of the signal strength. Thereby, the UE's radio power can be dynamically adjusted to an optimum value suitable for the current cell carrier frequency.
  • an embodiment of the present invention provides a UE that dynamically controls inner loop power.
  • the UE includes: a receiving module 401, a parsing module 402, and a power control module 403, where:
  • the receiving module 401 is configured to receive an inter-frequency handover command sent by the RRC;
  • the parsing module 402 is configured to parse the inter-frequency switching command, and extract a frequency value of the target cell from the
  • the power control module 403 is configured to control the inner loop power according to the frequency value of the target cell, the frequency value of the currently registered cell, and the radio frequency parameter corresponding to the different frequency band in the preset NV.
  • the power control belongs to the uplink inner loop power control
  • the receiving module 401 in the UE processes the semaphores from different cells through the RAKE receiver. For these semaphores, when it is determined that the signal quality of the currently registered cell carrier frequency is lower than the predetermined one.
  • the UE informs the RRC on the network side that the network side RRC initiates the inter-frequency hard handover, and notifies the UE to measure the inter-frequency cell signal, and the UE reports the inter-frequency measurement information to the RRC according to the previously agreed measurement control report format, and the RRC pairs the UE.
  • the reported inter-frequency measurement report is analyzed and judged, and the RRC determines that the inter-frequency cell signal quality is higher than the current
  • the inter-frequency hard handover command is sent to the UE to notify the UE to switch to the cell of the specified frequency.
  • the target cell is a cell to be handed over for the currently registered cell before the UE performs inter-frequency handover. After the UE performs inter-frequency handover, the target cell becomes the currently registered cell.
  • the trigger parsing module 402 parses the inter-frequency handover command, extracts the frequency value of the cell to be switched, and uses the frequency value of the target cell as the target cell.
  • the frequency value of the cell is sent to the power control module 403.
  • the power control module 403 compares the frequency value of the parsed target cell with the frequency value of the currently registered cell. If the frequency information does not change, no processing is performed; if the frequency information changes, it is confirmed that the UE needs to perform inter-frequency handover. And then, according to the frequency value of the target cell, derive a preset radio frequency parameter suitable for the frequency value of the target cell from the NV of the UE, and then automatically adjust the transmit power of the UE according to the radio frequency parameter (increase or decrease the transmit power of the UE), By transmitting the corresponding modulation signal through the adjusted transmission power, it is possible to reduce the network load as much as possible and prolong the standby time of the mobile phone without affecting the user experience.
  • the power control module 403 further includes: a comparing unit 4031, a deriving unit 4032, and an adjusting unit 4033, where:
  • the comparing unit 4031 is configured to compare the frequency value of the target cell with the frequency value of the currently registered cell
  • the deriving unit 4032 is configured to: derive, from the NV, the target cell when the frequency value of the target cell is different from the frequency value of the currently registered cell The frequency value matches the RF parameters;
  • the adjusting unit 4033 is configured to adjust a transmit power of the UE according to a radio frequency parameter that matches a frequency value of the target cell.
  • the adjusting unit 4033 is further configured to not adjust the transmit power of the UE when the frequency value of the target cell is the same as the frequency value of the currently registered cell.
  • another embodiment of the present invention provides a UE that dynamically controls inner loop power.
  • the UE further includes:
  • the setting module 404 is configured to set radio frequency parameters corresponding to different frequency bands in the NV.
  • the power control method in the foregoing embodiment is premise that the radio frequency parameters applicable to different frequency bands are preset and stored in the NV of the UE, and the setting of the radio frequency parameter may be set by the UE itself. It can also be set by other network elements and saved locally in the UE.
  • the radio frequency parameters applicable to different frequency bands are first set by the setting module 404 of the UE, and are saved locally, so that when the UE performs inter-frequency handover, the power control module 403 is derived from the NV.
  • the radio frequency parameters suitable for the current frequency band are adjusted for the transmission power. Others are the same as the above embodiment.
  • the method for dynamically controlling the inner loop power and the UE in the embodiment of the present invention when the UE performs inter-frequency handover, according to different transmission frequencies of the target cell, the UE configures radio frequency transmission power by using a set of parameters suitable for the carrier frequency of the target cell, thereby The radio frequency transmit power suitable for the carrier frequency of the target cell is dynamically adjusted, and the network load is minimized and the standby time of the mobile phone is extended without affecting the user experience.

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Abstract

本发明涉及一种动态控制内环功率的方法及UE，其方法包括：UE接收RRC发送的异频切换命令；对异频切换命令进行解析，从中提取出目标小区的频率值；根据目标小区的频率值、当前注册小区的频率值以及预置的NV中对应不同频段的射频参数，对内环功率进行控制。本发明在UE进行频间切换时，根据目标小区的发射频率的不同，UE采用适合于目标小区的载频的一套参数配置射频发射功率，从而动态调整适合于目标小区的载频的射频发射功率，实现了在不影响用户体验的前提下，尽可能减小网络负载，并延长手机的待机时间。

Description

动态控制内环功率的方法及 UE 技术领域
本发明涉及通信技术领域，尤其涉及 WCDMA( Wideband Code Division Multiple Access , 宽带码分多址接入 ) 系统中一种针对手机在不同载频的小 区间移动时， 动态控制内环功率的方法及 UE ( User equipment , 用户终端）。 背景技术
功率控制是 WCDMA中的关键技术之一。 功率控制的目的是为了克服 远近效应。 远近效应现象是指如果没有功率控制， 距离基站近的一个 UE 可以阻塞整个小区， 而距离基站远的 UE信号将被 "淹没"。 在上行链路中， 如果小区内所有 UE以相同的功率进行发射， 由于每个 UE与基站的距离和 路径不同，信号到达基站则会有不同的衰耗，从而导致离 UE较近的基站收 到的信号强， 较远的基站收到的信号弱， 由此造成基站所接收到的信号的 强度相差很大。 由于 WCDMA是同频接收系统， 较远的弱信号到达基站后 可能不会被解扩出来， 造成弱信号 "淹没" 在强信号中， 而无法正常工作。
功率控制包括内环功控及外环功控， 外环功控是在 SRNC ( Serving Radio Network Controller, 服务无线网络控制器）和基站之间完成， 用于将 无线链路维持在一定的水平， 即调节 SIR ( Signal to Interference Ratio, 信噪 干扰比 ) 目标值使无线链路的 BLER ( Block Error Rate, 块错误率 )维持在 某一水平。 内环功控是在 UE和基站之间完成。 内环功控分为下行内环功控 和上行内环功控。 下行内环功控的控制端为 UE, 执行端为基站， 即 UE根 据下行链路的实际质量测量结果向基站发送功控命令， 基站再根据此反馈 调整下行链路的发射功率； 上行内环功控的控制端是基站， 执行端是 UE, 即 UE根据基站通过下行链路给出的反馈调整上行链路的发射功率。 在 WCDMA系统中， 现有的功率控制方法适用于 UE在移动过程中与 基站距离变化的情况、 有障碍物遮挡的情况以及在小区间移动时进行软切 换等多种情况。 当 UE所处网络环境变化时， 通过与网络的交互， 调整基站 和本身的发射功率， 使无线链路维持在一个正常的水平。
对于运营商而言， 通常具有两个或两个以上的载频用于系统扩容。 在 话务量高的热点地区， 则需要使用多个载频进行覆盖以提高系统性能。 此 时， 不可避免的发生频间切换。 然而对于频间切换的情况， 小区间的频率 不同， UE处于相同信号强度的环境下需要的发送频率也不完全一致。 如果 对于所有频段的小区， 在相同信号强度的位置上都使用相同的发射功率， 势必会造成不必要的网络负担或 UE的接收信号欠佳。 发明内容
有鉴于此， 本发明的主要目的在于提供一种动态控制内环功率的方法 及 UE, 在 UE进行频间切换时， 可以减少网络负载， 提高用户体验。
为了达到上述目的， 本发明提出一种动态控制内环功率的方法， 包括： UE接收 RRC发送的异频切换命令；
对所述异频切换命令进行解析， 从中提取出目标小区的频率值； 根据所述目标小区的频率值、 当前注册小区的频率值以及预置的 NV 中对应不同频段的射频参数， 对内环功率进行控制。
优选地， 所述根据目标小区的频率值、 当前注册小区的频率值以及预 置的 NV中对应不同频段的射频参数， 对内环功率进行控制为：
比较所述目标小区的频率值与当前注册小区的频率值；
所述目标小区的频率值与当前注册小区的频率值不相同时，从所述 NV 中导出与所述目标小区的频率值匹配的射频参数；
根据所述与目标小区的频率值匹配的射频参数调整所述 UE 的发射功 率。 优选地， 该方法还包括：
所述目标小区的频率值与当前注册小区的频率值相同时，所述 UE不调 整发射功率。
优选地，所述 UE接收 RRC发送的异频切换命令之前，该方法还包括： UE通过耙子 RAKE接收机接收并处理不同小区信号；当所述当前注册 小区的载频信号质量低于预定门限时， 所述 UE向所述 RRC上报异频测量 报告， 由所述 RRC根据所述异频测量报告向所述 UE发送所述异频切换命 令。
优选地，所述 UE接收 RRC发送的异频切换命令之前，该方法还包括： 在所述 NV中设置对应不同频段的射频参数。
本发明还提出一种动态控制内环功率的 UE, 包括：
接收模块， 用于接收 RRC发送的异频切换命令；
解析模块， 用于对所述异频切换命令进行解析， 从中提取出目标小区 的频率值；
功控模块， 用于根据所述目标小区的频率值、 当前注册小区的频率值 以及预置的 NV中对应不同频段的射频参数， 对内环功率进行控制。
优选地， 所述功控模块进一步包括：
比较单元， 用于比较所述目标小区的频率值与当前注册小区的频率值； 导出单元， 用于所述目标小区的频率值与当前注册小区的频率值不相 同时， 从所述 NV中导出与所述目标小区的频率值匹配的射频参数；
调整单元， 用于根据所述与目标小区的频率值匹配的射频参数调整所 述 UE的发射功率。
优选地， 所述调整单元， 还用于所述目标小区的频率值与当前注册小 区的频率值相同时， 不调整所述 UE的发射功率。
优选地， 所述接收模块， 还用于通过 RAKE接收机接收并处理不同小 区信号；当所述当前注册小区的载频信号质量低于预定门限时，向所述 RRC 上报异频测量报告。
优选地， 上述 UE还包括：
设置模块， 用于在所述 NV中设置对应不同频段的射频参数。
本发明提出的一种动态控制内环功率的方法及 UE, 在 UE进行频间切 换时， 根据目标小区的发射频率的不同， UE采用适合于目标小区的载频的 一套参数配置射频发射功率， 从而动态调整适合于目标小区的载频的射频 发射功率， 实现了在不影响用户体验的前提下， 尽可能减小网络负载， 并 延长手机的待机时间。 附图说明
图 1是本发明动态控制内环功率的方法一实施例流程示意图； 图 2是本发明动态控制内环功率的方法一实施例中根据目标小区的频 率值、 当前注册小区的频率值以及预置的 NV中对应不同频段的射频参数， 对内环功率进行控制的流程示意图；
图 3是本发明动态控制内环功率的方法另一实施例流程示意图； 图 4是本发明动态控制内环功率的 UE—实施例的结构示意图； 图 5是本发明动态控制内环功率的 UE—实施例中功控模块的结构示意 图；
图 6是本发明动态控制内环功率的 UE另一实施例的结构示意图。
为了使本发明的技术方案更加清楚、 明了， 下面将结合附图作进一步 评述。 具体实施方式
本发明实施例解决方案主要是： 在 UE进行频间切换时，根据手机当前 注册到的小区发射频率的不同， UE采用适合于当前载频的一套射频参数配 置射频发射功率， 当 UE处于不同的小区时， 即使 UE处于信号强度相同的 位置， UE向基站发送的功率也不相同， 从而动态调整 UE的发射功率到一 个适合当前注册小区载频的最优值， 以减小网络负载， 并延长手机的待机 时间。
在 WCDMA系统中， UE的频间切换分为硬切换和软切换， 本发明实 施例中涉及的频间切换属于硬切换的一种。
如图 1 所示， 本发明一实施例提出一种动态控制内环功率的方法， 该 方法包括以下步驟：
步驟 S101 , UE接收 RRC发送的异频切换命令；
具体的， 本实施例中功率控制属于上行内环功率控制， UE通过耙子 ( RAKE )接收机处理来自不同小区的信号量， 针对这些信号量， 当判断出 当前注册小区载频的信号质量已经低于预定门限值时， UE告知网络侧 RRC ( Radio Resource control,无线资源控制层）， 网络侧 RRC启动异频硬切换， 并通知 UE测量异频小区信号， UE将异频测量信息按照事先约定的测量控 制报告格式上报给 RRC, RRC对 UE上报的异频测量报告进行分析判断， 当 RRC判断出异频小区信号质量高于当前注册小区载频信号质量一定门限 时， 则向 UE下发异频硬切换命令， 通知 UE切换到指定频率的小区。
步驟 S102,对异频切换命令进行解析，从中提取出目标小区的频率值； 具体的，目标小区是指相对 UE进行频间切换前的当前注册的小区而言 的将要切换的小区，当 UE进行频间切换后，目标小区则成为当前注册小区。
当 UE接收到 RRC发来的异频切换命令后， 对该异频切换命令进行解 析， 从中提取出将要切换的小区的频率值， 作为目标小区的频率值。
步驟 S103, 根据目标小区的频率值、 当前注册小区的频率值以及预置 的 NV ( Non- Volatile, 非易失性存储区域）中对应不同频段的射频参数， 对 内环功率进行控制； 具体的， UE将解析出的目标小区的频率值与从预先收到的系统广播消 息中解析出的当前注册的小区的频率值进行比较， 如果频率信息没有变化， 则不做任何处理； 如果频率信息有变化， 确认 UE需要进行频间切换， 则根 据该目标小区的频率值，从 UE的 NV中导出预置的适合该目标小区的频率 值的射频参数，再根据射频参数自动调整 UE的发射功率，通过调整后的发 射功率发射相应的调制信号， 从而实现了在不影响用户体验的前提下， 尽 可能减小网络负载， 延长手机的待机时间。
本实施例中根据运营商可能支持的各种载频值，在 UE的 NV中预先设 置并保存有适合于相应频段的射频参数供 UE进行相关参数的配置使用 ,这 些射频参数的区别主要体现在期望 UE工作时的发射功率上。
具体的， 如图 2所示， 上述步驟 S103进一步包括以下步驟：
步驟 S1031 , 比较目标小区的频率值与当前注册小区的频率值； 若目标 小区的频率值与当前注册小区的频率值不相同， 则进入步驟 S1032; 否则， 进入步驟 S1034。
步驟 S1032,从 NV中导出与目标小区的频率值匹配的射频参数； 并进 入下一步。
步驟 S1033,根据与目标小区的频率值匹配的射频参数调整 UE的发射 功率。
步驟 S1034, UE不调整发射功率。
本实施例在 UE进行频间切换时， 根据目标小区的发射频率的不同， UE采用适合于目标小区的载频的一套参数配置射频发射功率，从而动态调 整适合于目标小区的载频的射频发射功率， 实现了在不影响用户体验的前 提下， 尽可能减小网络负载， 并延长手机的待机时间。
如图 3 所示， 本发明另一实施例提出一种动态控制内环功率的方法， 在上述实施例的基础上， 在上述步驟 S101之前， 该方法还包括以下步驟： 步驟 S100, 在 NV中设置对应不同频段的射频参数。
本实施例与上述实施例的区别在于， 上述实施例中功率控制方法的前 提是在 UE的 NV中预置并保存有适用于不同频段的射频参数，该射频参数 的设置可以由 UE自身设置， 也可以由其它网元设置并保存在 UE本地。
本实施例在进行内环功率控制时，首先由 UE自身设置适用于不同频段 的射频参数， 并保存在本地， 当 UE进行频间切换时， 从 NV中导出适合当 前频段的射频参数进行发射功率的调整。
本实施例当 UE在进行频间切换时， 根据当前注册小区发射频率的不 同， UE采用适合于当前载频的一套参数配置射频发射功率。 当 UE处于不 同的小区时， 即使 UE处于信号强度相同的位置， UE向基站发送的功率也 不相同。 从而可以动态调整 UE 的射功率到一个适合当前小区载频的最优 值。
如图 4 所示， 本发明一实施例提出一种动态控制内环功率的 UE, 该 UE包括： 接收模块 401、 解析模块 402以及功控模块 403, 其中：
接收模块 401 , 用于接收 RRC发送的异频切换命令；
解析模块 402, 用于对所述异频切换命令进行解析，从中提取出目标小 区的频率值；
功控模块 403, 用于根据目标小区的频率值、 当前注册小区的频率值以 及预置的 NV中对应不同频段的射频参数， 对内环功率进行控制。
本实施例中功率控制属于上行内环功率控制， UE中接收模块 401通过 RAKE接收机处理来自不同小区的信号量， 针对这些信号量， 当判断出当 前注册小区载频的信号质量已经低于预定门限值时， UE告知网络侧 RRC, 网络侧 RRC启动异频硬切换， 并通知 UE测量异频小区信号， UE将异频 测量信息按照事先约定的测量控制报告格式上报给 RRC, RRC对 UE上报 的异频测量报告进行分析判断， 当 RRC判断出异频小区信号质量高于当前 注册小区载频信号质量一定门限时， 则向 UE 下发异频硬切换命令， 通知 UE切换到指定频率的小区。
其中，目标小区是指相对 UE进行频间切换前的当前注册的小区而言的 将要切换的小区， 当 UE进行频间切换后， 目标小区则成为当前注册小区。
当接收模块 401接收到 RRC发来的异频切换命令后，触发解析模块 402 对该异频切换命令进行解析， 从中提取出将要切换的小区的频率值， 作为 目标小区的频率值， 并将目标小区的频率值发送给功控模块 403。
功控模块 403将解析出的目标小区的频率值与当前注册的小区的频率 值进行比较， 如果频率信息没有变化， 则不做任何处理； 如果频率信息有 变化， 确认 UE需要进行频间切换， 则根据该目标小区的频率值， 从 UE的 NV中导出预置的适合该目标小区的频率值的射频参数，再根据射频参数自 动调整 UE的发射功率 （增加或减小 UE的发射功率）， 通过调整后的发射 功率发射相应的调制信号， 从而实现了在不影响用户体验的前提下， 尽可 能减小网络负载， 延长手机的待机时间。
具体实施过程中， 如图 5所示， 功控模块 403进一步包括： 比较单元 4031、 导出单元 4032以及调整单元 4033, 其中：
比较单元 4031 ,用于比较目标小区的频率值与当前注册小区的频率值； 导出单元 4032, 用于当目标小区的频率值与当前注册小区的频率值不 相同时， 从 NV中导出与目标小区的频率值匹配的射频参数；
调整单元 4033,用于根据与目标小区的频率值匹配的射频参数调整 UE 的发射功率。
进一步的， 调整单元 4033还用于当目标小区的频率值与当前注册小区 的频率值相同时， 不调整 UE的发射功率。
如图 6所示， 本发明另一实施例提出一种动态控制内环功率的 UE, 在 上述实施例的基础上， 该 UE还包括： 设置模块 404, 用于在 NV中设置对应不同频段的射频参数。
本实施例与上述实施例的区别在于， 上述实施例中功率控制方法的前 提是在 UE的 NV中预置并保存有适用于不同频段的射频参数，该射频参数 的设置可以由 UE自身设置， 也可以由其它网元设置并保存在 UE本地。
本实施例在进行内环功率控制时，首先由 UE自身的设置模块 404设置 适用于不同频段的射频参数， 并保存在本地， 以便当 UE进行频间切换时， 功控模块 403从 NV中导出适合当前频段的射频参数进行发射功率的调整。 其他与上述实施例相同。
本发明实施例动态控制内环功率的方法及 UE,在 UE进行频间切换时， 根据目标小区的发射频率的不同， UE采用适合于目标小区的载频的一套参 数配置射频发射功率， 从而动态调整适合于目标小区的载频的射频发射功 率， 实现了在不影响用户体验的前提下， 尽可能减小网络负载， 并延长手 机的待机时间。
以上所述仅为本发明的优选实施例， 并非因此限制本发明的专利范围 , 凡是利用本发明说明书及附图内容所作的等效结构或流程变换， 或直接或 间接运用在其它相关的技术领域， 均同理包括在本发明的专利保护范围内。

Claims

权利要求书
1、 一种动态控制内环功率的方法， 其特征在于， 该方法包括： 用户终端 UE接收无线资源控制层 RRC发送的异频切换命令； 对所述异频切换命令进行解析， 从中提取出目标小区的频率值； 根据所述目标小区的频率值、 当前注册小区的频率值以及预置的非易 失性存储区域 NV中对应不同频段的射频参数， 对内环功率进行控制。
2、 根据权利要求 1所述的方法， 其特征在于， 所述根据目标小区的频 率值、 当前注册小区的频率值以及预置的 NV中对应不同频段的射频参数， 对内环功率进行控制为：
比较所述目标小区的频率值与当前注册小区的频率值；
所述目标小区的频率值与当前注册小区的频率值不相同时，从所述 NV 中导出与所述目标小区的频率值匹配的射频参数；
根据所述与目标小区的频率值匹配的射频参数调整所述 UE 的发射功 率。
3、 根据权利要求 2所述的方法， 其特征在于， 该方法还包括： 所述目标小区的频率值与当前注册小区的频率值相同时，所述 UE不调 整发射功率。
4、 根据权利要求 1、 2或 3所述的方法， 其特征在于， 所述 UE接收 RRC发送的异频切换命令之前， 该方法还包括：
UE通过耙子 RAKE接收机接收并处理不同小区信号；当所述当前注册 小区的载频信号质量低于预定门限时， 所述 UE向所述 RRC上报异频测量 报告， 由所述 RRC根据所述异频测量报告向所述 UE发送所述异频切换命 令。
5、根据权利要求 4所述的方法， 其特征在于， 所述 UE接收 RRC发送 的异频切换命令之前， 该方法还包括： 在所述 NV中设置对应不同频段的射频参数。
6、 一种动态控制内环功率的 UE, 其特征在于， 该 UE包括： 接收模块， 用于接收 RRC发送的异频切换命令；
解析模块， 用于对所述异频切换命令进行解析， 从中提取出目标小区 的频率值；
功控模块， 用于根据所述目标小区的频率值、 当前注册小区的频率值 以及预置的 NV中对应不同频段的射频参数， 对内环功率进行控制。
7、 根据权利要求 6所述的 UE, 其特征在于， 所述功控模块进一步包 括：
比较单元， 用于比较所述目标小区的频率值与当前注册小区的频率值； 导出单元， 用于所述目标小区的频率值与当前注册小区的频率值不相 同时， 从所述 NV中导出与所述目标小区的频率值匹配的射频参数；
调整单元， 用于根据所述与目标小区的频率值匹配的射频参数调整所 述 UE的发射功率。
8、 根据权利要求 7所述的 UE, 其特征在于， 所述调整单元， 还用于 所述目标小区的频率值与当前注册小区的频率值相同时， 不调整所述 UE 的发射功率。
9、 根据权利要求 6、 7或 8所述的 UE, 其特征在于， 所述接收模块， 还用于通过 RAKE接收机接收并处理不同小区信号； 当所述当前注册小区 的载频信号质量低于预定门限时， 向所述 RRC上报异频测量报告。
10、 根据权利要求 9所述的 UE, 其特征在于， 该 UE还包括： 设置模块， 用于在所述 NV中设置对应不同频段的射频参数。
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