WO2013071665A1 - 一种上行功率控制方法、装置、基站及系统 - Google Patents

一种上行功率控制方法、装置、基站及系统 Download PDF

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Publication number
WO2013071665A1
WO2013071665A1 PCT/CN2011/083839 CN2011083839W WO2013071665A1 WO 2013071665 A1 WO2013071665 A1 WO 2013071665A1 CN 2011083839 W CN2011083839 W CN 2011083839W WO 2013071665 A1 WO2013071665 A1 WO 2013071665A1
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user terminal
sirtarget
subframe
base station
module
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PCT/CN2011/083839
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English (en)
French (fr)
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刘渊
沈伟
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中兴通讯股份有限公司
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Publication of WO2013071665A1 publication Critical patent/WO2013071665A1/zh

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    • 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
    • H04W52/241TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
    • 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
    • H04W52/146Uplink power control

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a wideband code division multiple access mobile communication system
  • WCDMA is a self-interference system
  • the signal of each user terminal in the small area is interference to other user terminals. Therefore, how to effectively control the power, under the premise of ensuring the quality of service required by the user terminal, to minimize the transmission power, reduce system interference and increase system capacity, is a key technology in the WCDMA system.
  • E-DCH An enhanced uplink dedicated transport channel
  • HSUPA High Speed Uplink Packet Access
  • DPCCH Dedicated Physical Control Channel
  • the DPCCH is always transmitting, and the target signal-to-noise ratio (SIRtarget) of the HSUPA service is larger than the SIRtarget of the voice service (meaning that the transmission power of the HSUPA service is greater than The voice service is increased, and the Received Signal Strength Indicator (RSSI) in the channel bandwidth of the cell is increased, which has a large interference and impact on other user terminals.
  • SIRtarget target signal-to-noise ratio
  • RSSI Received Signal Strength Indicator
  • the technical problem to be solved by the present invention is to provide an uplink power control method, apparatus, base station and system in a WCDMA system, which effectively reduces the transmission power of the HSUPA user terminal for terminals or base stations that do not support the CPC function.
  • the present invention provides an uplink power control method, the method comprising the following steps:
  • the base station After receiving the first subframe of the radio frame, the base station uses the first subframe to perform signal-to-noise ratio SIR estimation; if the SIR estimation result of the first subframe does not exceed a preset threshold, then after the transmission time interval The SIRtarget of the user terminal is lowered in the subframe.
  • the present invention further provides an uplink power control apparatus, the apparatus comprising a receiving module, an estimating module, a judging module and an adjusting module, wherein:
  • the receiving module is configured to receive a radio frame
  • the estimating module is configured to receive the first subframe of the radio frame, the first subframe is used to perform signal to noise ratio SIR estimation;
  • the determining module is configured to determine whether the SIR estimation result of the first subframe exceeds a preset threshold; the adjusting module is configured to: when the SIR estimation result of the first subframe does not exceed a preset threshold, in the subsequent subframe in the ⁇ Reduce the SIRtarget of the user terminal.
  • the present invention also provides a base station including the above uplink power control apparatus.
  • the present invention also provides a WCDMA system, the system A user terminal and a base station including the above uplink power control device are included.
  • the terminal or the base station that does not support the CPC function can effectively reduce the transmit power of the user terminal by reducing the target value of the signal to noise ratio, and can control the rise of the RSSI of the cell in a cell with multiple HSUPA user terminals. , reduce mutual interference between user terminals, improve system and cell capacity.
  • FIG. 1 is a flowchart of an uplink power control method according to Embodiment 1 of the present invention
  • FIG. 2 is a comparison table of a related signal provided by Embodiment 1 of the present invention and a target signal-to-noise ratio SIRtarget in the power method of the present invention
  • FIG. 3 is a block diagram showing the structure of an uplink power control apparatus according to Embodiment 3 of the present invention. detailed description
  • FIG. 1 is a flowchart of an uplink power control method according to Embodiment 1 of the present invention
  • Step S102 After receiving a first subframe of a radio frame, the base station uses an uplink dedicated control channel (E) of the first subframe.
  • E uplink dedicated control channel
  • EDPCCH Dedicated Physical Control Channel
  • Step S104 the base station determines whether the SIR estimation result of the first subframe exceeds a preset threshold, if yes, step S105 is performed, otherwise step S106 is performed;
  • the preset threshold can be obtained through system simulation.
  • the selection principle of the threshold is to meet the false alarm and missed detection requirements specified in the agreement.
  • Step S105 according to normal power control processing, go to step S108;
  • the SIR estimation result exceeds the threshold, it is considered that the user terminal has uplink data transmission in the transmission time interval TTI, and power control is performed according to a normal process.
  • the RNC sends a new SIRtarget through the outer loop power control, the new configuration value is adopted, that is, the processing of the subsequent sub-frames is consistent with the traditional manner, and the SIR target is configured and determined by the RNC.
  • Step S106 Decrease the SIRtarget of the user terminal in the subsequent subframes in the UI.
  • the SIR estimation result does not exceed the threshold, it is considered that the user terminal in the UI does not send data on the EDCH channel.
  • the base station actively reduces the SIRtarget of the user terminal.
  • the reduction of SIRtarget can be obtained by system simulation, which can be fixed value or percentage.
  • the selection principle of this value is to ensure that the wireless link between the terminal and the base station is in a synchronized state while minimizing the transmission power of the user terminal.
  • the base station since the base station performs SIR estimation on the DPCCH through each time slot, the SIR estimated value is compared with the SIRtarget to generate a Transmit Power Control (TPC) command, and the TPC command generation rule is generated. It is specified by the agreement to control whether the power of the user terminal is up or down. Therefore, as long as the SIRtarget is lower, the transmit power of the user terminal is lower.
  • TPC Transmit Power Control
  • Step S108 After the next ⁇ starts, repeat the above steps.
  • the terminal user cannot currently predict whether the EDCH data is transmitted by the next transmission interval, in order to ensure that the base station can correctly receive the data after the terminal user starts to send data, when the user ends, the user is restored.
  • the SIRtarget value of the terminal is up to the normal value.
  • the timing of restoring the SIRtarget value can also be advanced according to the actual situation.
  • the above five steps can be appropriately adjusted according to actual conditions.
  • the transmission power of the user terminal can be effectively reduced, the uplink interference can be reduced, and the system performance and capacity can be improved.
  • Example 2
  • the power control method of the present invention includes the following steps:
  • Step S202 For the HSUPA user terminal that is 10MS, the base station performs SIR estimation on the data of the subframe after collecting the data of the first subframe (0-2th slot) of the EDPCCH channel of the user terminal. .
  • Step S204 The base station determines whether the SIR estimation result of the first subframe exceeds a preset threshold.
  • step S205 is performed according to normal power control; otherwise, step S206 is performed to adjust SIRtarget;
  • Step S205 according to normal power control processing, go to step S208;
  • the SIR estimation result exceeds the threshold M, it is considered that the user terminal has uplink data transmission within the 10MS transmission interval, and power control is performed according to a normal procedure.
  • the SIRtarget sent by the RNC is K at this time, and the SIRtarget is K in the next 4 subframes (3-14 slots) of the 10MS.
  • the RNC sends a new SIRtarget through the outer loop power control, the new configuration value is adopted, that is, the processing of the next four subframes is consistent with the traditional manner, and the SIR target is configured and determined by the RNC. .
  • Step S206 reducing the user terminal in the following four subframes of the transmission time interval ⁇
  • the base station Proactively reduce the SIRtarget of this user. Assuming that the SIRtarget value of the current RNC configuration is K, the reduced SIRtargett value is K-N.
  • Steps S207, 10 After the MS TTI ends, the SIRtarget of the user terminal is restored to K.
  • This step is optional, and the timing of the recovery may be selected in advance according to actual conditions, for example: If the first subframe determines that the terminal does not have data transmission in the 10MS radio frame, then the 2-4th subframe of the 10MS frame ( The 4th-12th slot) performs the operation of lowering the SIRtarget, and recovers the SIRtarget from the 13th slot of the 10MS frame. To put it simply, the first subframe is judged, the 2-4th subframe is lowered by SIRtarget, and the fifth subframe is restored to SIRtarget.
  • Step S208 After the next 10 MS TTI starts, repeat the above steps.
  • the probability and possibility of the user terminal continuing to upload data is very small, and the uplink data transmission and transmission are basically intermittent.
  • the DPCCH is always to be transmitted, and since the SIRtarget of the HSUPA data service is larger than the SIRtarget of the voice service, there is no data transmission time at the user terminal.
  • the traditional power control method is used, and the transmit power of the terminal is still maintained at a high level. After the method provided by the embodiment of the present invention is used, in this case, the user terminal is reduced due to the SIRtarget of the user terminal. The transmission power is also correspondingly reduced. It can be seen from FIG.
  • the 15 Slots of the 10MS in the conventional manner all adopt the same SIRtarget (assuming the value is K); the method of the embodiment of the present invention is adopted.
  • the SIRtarget of the last 12 slots of the 10MS is KN, so the transmission power of the user terminal in the next 12 slots is lower than that of the conventional method, so the transmission power of the terminal is low in 80% of the time.
  • the transmission power of the HSUPA user terminal can be effectively reduced, the uplink interference is reduced, and the system performance and capacity are improved.
  • FIG. 3 is a block diagram of an uplink power control apparatus according to Embodiment 3 of the present invention.
  • the composition includes a receiving module 302, an estimating module 304, a determining module 306, and an adjusting module 306, where:
  • the receiving module 302 is configured to receive a radio frame.
  • the estimating module 304 is configured to: after receiving the first subframe of the radio frame, perform signal to noise ratio SIR estimation by using the first subframe;
  • the determining module 306 is configured to determine whether the SIR estimation result of the first subframe exceeds a preset threshold
  • the adjusting module 308 is configured to: when the SIR estimation result of the first subframe does not exceed a preset threshold, reduce the SIRtarget of the user terminal in a subsequent subframe in the UI.
  • the adjustment module 308 is specifically configured to reduce the SIR target by a fixed value or by a proportional
  • the adjustment module 308 is also used to ensure that the base station can correctly receive the data after the terminal user starts to send data.
  • the SIRtarget of the user terminal is restored to a normal value.
  • the timing of restoring the SIRtarget value can also be advanced according to the actual situation.
  • the present invention further provides a base station in a WCDMA system, the base station includes the above uplink power control device, and the present invention further provides a WCDMA system, the system comprising a user terminal, and a base station including the uplink power control device,
  • WCDMA system the system comprising a user terminal, and a base station including the uplink power control device
  • the invention can effectively reduce the transmission power of the HSUPA user terminal, reduce the uplink interference, and improve the system performance and capacity.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明公开了一种上行功率控制方法,适用于WCDMA系统中,所述方法包括:基站接收无线帧的第1个子帧后,利用该第1个子帧进行信噪比SIR估计;如果第1个子帧的SIR估计结果没有超过预设的门限,则在该传输时间间隔TTI后面的子帧中降低该用户终端的目标信噪比SIRtarget。从而降低HSUPA用户终端的发射功率。本发明还公开了一种上行功率控制装置、基站及系统,通过本发明,能够有效降低HSUPA用户终端的发射功率,降低上行干扰,提高系统性能和容量。

Description

一种上行功率控制方法、 装置、 基站及系统 技术领域
本发明涉及无线通信领域, 特别涉及一种宽带码分多址移动通信系统
WCDMA系统中的上行功率控制方法、 装置、 基站及系统。 背景技术
众所周知, WCDMA是一个自干扰系统, 小区内的每一个用户终端的 信号对其它用户终端来说都是干扰。 因此如何有效的进行功率控制, 在保 证用户终端要求的服务质量的前提下, 最大程度降低发射功率, 减少系统 干扰从而增加系统容量, 是 WCDMA系统中的一项关键技术。
在 R6标准协议引入了增强上行链路专用传输信道( Enhanced UL DCH, 简称 E-DCH ),该信道的引入使得用户终端的上行速率极大的提高,峰值速 率可以达到 5.76Mbps。 支持该信道的技术称之为高速上行分组接入技术 ( High Speed Uplink Packet Access,简称 HSUPA )。但随着上行速率的提高, 用户终端的发射功率也相应的提高。 R6标准协议中规定, 不管用户终端是 否有数据发送, 专用控制信道(Dedicated Physical Control Channel, 简称 DPCCH ), 都是一直要进行发送的, 因此, 在那些支持 HSUPA技术的用户 终端所在的小区, 即使同一时间内同时进行数据上传的用户终端不是很多, 但由于 DPCCH—直都在发送, 并且由于 HSUPA业务的目标信噪比(简称 SIRtarget )大于语音业务的 SIRtarget (意味着 HSUPA业务的发射功率也大 于语音业务), 从而会造成小区的信道带宽内的宽带接收功率 (Received Signal Strength Indicator, 简称 RSSI )升高, 对其它用户终端有较大的干 扰和影响。
在 R7标准协议中引入了 CPC ( Continuous Packet Connectivity永久在 线技术), 该技术中规定如果终端没有数据发送的时候, DPCCH可以按照 一定的规则进行不连续的发送, 从而可以降低小区内的上行干扰, 提升小 区的容量。 但是目前商用网中有大量不支持 CPC技术的商用终端, 且有部 分老型号的基站也不支持 CPC功能,无法使用 CPC技术提高系统性能和容 量。 发明内容
本发明要解决的技术问题是提供一种 WCDMA系统中的上行功率控制 方法、 装置、 基站及系统, 对于那些不支持 CPC功能的终端或者基站, 有 效降低 HSUPA用户终端的发射功率。
根据本发明的一方面,本发明提供了一种上行功率控制方法, 该方法包 括以下步驟:
基站接收无线帧的第 1个子帧后, 利用该第 1个子帧进行信噪比 SIR 估计;如果第 1个子帧的 SIR估计结果没有超过预设的门限, 则在该传输时 间间隔 ΤΉ内后面的子帧中降低该用户终端的 SIRtarget。
根据本发明的另一个方面,本发明还提供了一种上行功率控制装置, 该 装置包括接收模块、 估算模块、 判断模块和调整模块, 其中:
接收模块用于接收无线帧;
估算模块用于接收无线帧的第 1个子帧后, 利用该第 1个子帧进行信 噪比 SIR估计;
判断模块用于判断第 1个子帧的 SIR估计结果是否超过预设的门限; 调整模块用于当第 1个子帧的 SIR估计结果没有超过预设的门限时, 在该 ΤΉ内后面的子帧中降低该用户终端的 SIRtarget。
根据本发明的又一个方面,本发明还提供了一种基站, 该基站包含上述 上行功率控制装置。
根据本发明的再一个方面,本发明还提供了一种 WCDMA系统,该系统 包括用户终端、 以及包括上述上行功率控制装置的基站。 采用本发明的实施例, 能对于不支持 CPC功能的终端或者基站, 通过 降低信噪比目标值来有效地降低用户终端的发射功率,在 HSUPA用户终端 多的小区, 能够控制小区的 RSSI 的抬升, 减小用户终端之间的相互干扰, 提升系统性和小区容量。 附图说明
图 1是本发明实施例 1提供的一种上行功率控制方法流程图; 图 2是本发明实施例 1提供的相关技术和本发明的功率方法中目标信 噪比 SIRtarget的对比表;
图 3是本发明实施例 3提供的一种上行功率控制装置的模块结构图。 具体实施方式
为了使本发明所要解决的技术问题、 技术方案及有益效果更加清楚、 明白, 以下结合附图和实施例, 对本发明进行进一步详细说明。 应当理解, 此处所描述的具体实施例仅仅用以解释本发明, 并不用于限定本发明。
实施例 1
如图 1所示本发明实施例 1提供的一种上行功率控制方法流程图; 步驟 S102、 基站接收无线帧的第 1个子帧后, 利用该第 1个子帧的上 行链路专用控制信道(E-DCH Dedicated Physical Control Channel, 简称 EDPCCH )进行 SIR估计;
步驟 S104、 基站判断第 1个子帧的 SIR估计结果是否超过预设的门限, 如果超过, 执行步驟 S105 , 否则执行步驟 S106;
其中, 预设的门限可以通过系统仿真获得, 该门限的选取原则是能够 满足协议规定的虚警和漏检要求。 步驟 S105、 按正常功率控制进行处理, 转至步驟 S108;
本步驟中, 由于 SIR估计结果超过了门限, 认为该传输时间间隔 TTI 内该用户终端有上行数据发送, 按照正常的流程进行功率控制。 当然, 如 果此时 RNC通过外环功控下发了新的 SIRtarget, 此时就采用新配置的值, 也就是说后面几个子帧的处理和传统方式一致,都是由 RNC来配置和决定 SIRtarget
步驟 S106、在该 ΤΉ内后面的几个子帧中降低该用户终端的 SIRtarget; 本步驟中, 由于 SIR估计结果没有超过门限, 认为该 ΤΉ内用户终端 没有在 EDCH信道上发送数据, 此时就在该 ΤΉ的后面几个子帧中, 基站 主动降低该用户终端的 SIRtarget。
其中, SIRtarget 的降低幅度可以通过系统仿真获得, 可以是固定值, 也可以是百分比。 该值的选取原则是在尽量降低用户终端的发射功率的情 况下, 保证该终端和基站之间的无线链路处于同步状态。
这里需要说明的是, 由于基站通过每个时隙对 DPCCH进行 SIR估计, 将 SIR 估计得到的值和 SIRtarget 进行比较, 从而产生传输功率控制 ( Transmit Power Control, TPC )命令, 该 TPC命令的产生规则是协议规定 的, 用于控制用户终端的功率是升还是降。 所以, 只要 SIRtarget越低, 用 户终端的发射功率也就越低。
步驟 S108、 下一个 ΤΉ开始后, 重复执行上面的步驟。
优选地, 在当前传输间隔 ΤΉ结束后, 因为当前无法预知下一个传输 间隔终端用户是否有 EDCH数据发送, 为了保证终端用户开始发数据后基 站能正确的接收, 当该 ΤΉ结束后, 恢复该用户终端的 SIRtarget值到正常 值。 当然, 恢复 SIRtarget值的时机也可以根据实际情况进行提前。
在具体的实施方案中, 可以根据实际情况对上述的五个步驟进行适当 的调整。 通过本实施例, 能够有效降低用户终端的发射功率, 降低上行干扰, 提高系统性能和容量。 实施例 2
本实施例中以传输间隔 ΤΉ为 10MS的 HSUPA用户为实例进行说明 本发明的功率控制方法 (同样可以参考图 1), 包括以下步驟:
步驟 S202、 对于 ΤΉ为 10MS的 HSUPA用户终端, 基站在收齐该用 户终端的 EDPCCH信道的第一个子帧 (第 0-2个时隙) 的数据后, 对该子 帧的数据进行 SIR估计。
步驟 S204、 基站判断第 1个子帧的 SIR估计结果是否超过预设的门限
(假设为 M ), 如果超过, 则执行步驟 S205按正常功率控制进行处理; 否 则执行步驟 S206调整 SIRtarget;
步驟 S205、 按正常功率控制进行处理, 转至步驟 S208;
如果 SIR估计结果超过了门限 M, 则认为该 10MS传输间隔内该用户 终端有上行数据发送, 按照正常的流程进行功率控制。 假设此时 RNC下发 的 SIRtarget为 K,则在该 10MS的后面 4个子帧(第 3-14时隙)内, SIRtarget 都为 K。 当然, 如果此时 RNC通过外环功控下发了新的 SIRtarget, 此时就 采用新配置的值, 也就是说后面 4个子帧的处理和传统方式一致, 都是由 RNC来配置和决定 SIRtarget。
步驟 S206、 在传输时间间隔 ΤΉ的后面 4个子帧中降低该用户终端的
SIRtarget;
如果 SIR估计结果没有超过门限 M,则认为该 10MS的 15个时隙内用 户终端没有在 EDCH信道上发送数据, 此时就在该 10MS的后面 4个子帧 ( 3-14时隙 ) 内, 基站主动降低该用户的 SIRtarget。 假设当前 RNC配置 的 SIRtarget值为 K, 则降低后的 SIRtargett值为 K-N。
其中, SIRtarget的降低幅度 N的选取有两种方式: a) N取固定的值, 比如: N=2 db。
b) N的取值是一个动态的值, N的取值根据 K的值变化而变化。 比如: N=0.3K。 相当于在原来 SIRtarget的基础上下降一定的比例。
步驟 S207、 10 MS TTI结束后, 恢复该用户终端的 SIRtarget为 K。 本步驟是可选的, 且可以根据实际情况提前选择恢复的时机, 比如: 如果第 1个子帧判断出该 10MS无线帧中终端没有数据发送, 则对该 10MS帧的第 2-4个子帧 (第 4-12时隙 )进行降低 SIRtarget的操作, 从该 10MS帧的第 13时隙开始就恢复 SIRtarget。 简单的说就是: 第 1个子帧进 行判断, 第 2-4个子帧降低 SIRtarget, 第 5个子帧开始恢复 SIRtarget。
步驟 S208、 下一个 10 MS TTI开始后, 重复上面的步驟。
在商用网的实际应用中, 用户终端一直持续进行数据上传的概率和可 能性都很小,基本都是断续进行上行数据发射传输的。但在非 CPC情况下, 即使该用户终端没有进行上行数据传输,此时 DPCCH都是一直要进行发送 的, 并且由于 HSUPA数据业务的 SIRtarget大于语音业务的 SIRtarget, 那 么在用户终端没有数据发送的时间内, 采用传统的功率控制方法, 此时终 端的发射功率仍然维持在较高的水平, 而采用本发明实施例提供的方法后, 在此种情况下, 由于降低了用户终端的 SIRtarget, 用户终端的发射功率也 相应的降低。从图 2中可以看出: 在 10MS TTI内用户终端没有数据发送的 情况下, 传统方式该 10MS的 15个时隙都采用相同的 SIRtarget (假设该值 为 K );采用本发明实施例的方法后,在该 10MS的后面 12个时隙的 SIRtarget 为 K-N,因此在后面 12个时隙内用户终端的发射功率就比传统方式的要低, 故在 80%的时间内终端的发射功率都低于传统的方法, 从而能够有效降低 HSUPA用户终端的发射功率, 降低上行干扰, 提高系统性能和容量。 实施例 3
如图 3所示是本发明实施例 3提供的一种上行功率控制装置的模块结 构图, 该装置包括接收模块 302、 估计模块 304、 判断模块 306和调整模块 306, 其中:
接收模块 302用于接收无线帧;
估算模块 304用于接收无线帧的第 1个子帧后, 利用该第 1个子帧进 行信噪比 SIR估计;
判断模块 306用于判断第 1个子帧的 SIR估计结果是否超过预设的门 限;
调整模块 308用于当第 1个子帧的 SIR估计结果没有超过预设的门限 时, 在该 ΤΉ内后面的子帧中降低该用户终端的 SIRtarget。
具体地, 调整模块 308 具体用于按固定值或者按比例降低所述 SIRtarget
优选地, 在当前传输间隔 ΤΉ结束后, 因为当前无法预知下一个传输 间隔终端用户是否有 EDCH数据发送, 为了保证终端用户开始发数据后基 站能正确的接收, 调整模块 308还用于在该 ΤΉ结束后恢复该用户终端的 SIRtarget到正常值。 当然, 恢复 SIRtarget值的时机也可以根据实际情况进 行提前。 此外, 本发明还提供了一种 WCDMA系统中的基站, 该基站包括上述 上行功率控制装置, 本发明还提供了一种 WCDMA系统, 该系统包括用户 终端、 以及包括上述上行功率控制装置的基站, 具体技术方案参见上述实 施例 1-3, 这里不再重复。 上述说明示出并描述了本发明的一个优选实施例, 但如前所述, 应当 理解本发明并非局限于本文所披露的形式, 不应看作是对其他实施例的排 除, 而可用于各种其他组合、 修改和环境, 并能够在本文所述发明构想范 围内, 通过上述教导或相关领域的技术或知识进行改动。 而本领域人员所 进行的改动和变化不脱离本发明的精神和范围, 则都应在本发明所附权利 要求的保护范围内。 工业实用性
本发明能够有效降低 HSUPA用户终端的发射功率, 降低上行干扰, 提 高系统性能和容量。

Claims

权利要求书
1、 一种上行功率控制方法, 所述方法包括以下步驟:
基站接收无线帧的第 1个子帧后, 利用该第 1个子帧进行信噪比 SIR 估计, 如果第 1个子帧的 SIR估计结果没有超过预设的门限, 则在该传输 时间间隔 ΤΉ内后面的子帧中降低该用户终端的目标信噪比 SIRtarget。
2、 根据权利要求 1 所述的方法, 所述降低该用户终端的目标信噪比 SIRtarget具体为: 按固定值或者按比例降低所述 SIRtarget。
3、 根据权利要求 1所述的方法, 所述方法之后还包括: 所述 ΤΉ结束 后, 恢复该用户终端的目标信噪比到正常值。
4、根据权利要求 1所述的方法, 所述预设的门限和所述 SIRtarget的降 低幅度通过仿真得到。
5、 根据权利要求 1-4任意一项所述的方法, 所述用户终端为高速上行 分组接入技术 HSUPA终端, 所述 TTI为 10ms。
6、 一种上行功率控制装置, 所述装置包括: 接收模块、 估算模块、 判 断模块和调整模块, 其中:
所述接收模块用于接收无线帧;
所述估算模块用于接收无线帧的第 1个子帧后, 利用该第 1个子帧进 行信噪比 SIR估计;
所述判断模块用于判断第 1个子帧的 SIR估计结果是否超过预设的门 限;
所述调整模块用于当第 1个子帧的 SIR估计结果没有超过预设的门限 时, 在该 ΤΉ内后面的子帧中降低该用户终端的 SIRtarget。
7、 根据权利要求 6所述的装置, 所述调整模块具体用于按固定值或者 按比例降低所述 SIRtarget。
8、 根据权利要求 6所述的装置, 所述调整模块还用于, 所述 ΤΉ结束 后恢复该用户终端的 SIRtarget到正常值。
9、 一种基站, 该基站包含如权利要求 6-8任意一项所述的装置。
10、 一种 WCDMA系统, 包括用户终端和基站, 所述基站为权利要求 9所述的基站。
PCT/CN2011/083839 2011-11-16 2011-12-12 一种上行功率控制方法、装置、基站及系统 WO2013071665A1 (zh)

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