WO2011124037A1 - 一种信道质量指示信息的反馈方法及装置 - Google Patents

一种信道质量指示信息的反馈方法及装置 Download PDF

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Publication number
WO2011124037A1
WO2011124037A1 PCT/CN2010/073391 CN2010073391W WO2011124037A1 WO 2011124037 A1 WO2011124037 A1 WO 2011124037A1 CN 2010073391 W CN2010073391 W CN 2010073391W WO 2011124037 A1 WO2011124037 A1 WO 2011124037A1
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Prior art keywords
channel quality
indication information
current
quality indication
value
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PCT/CN2010/073391
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English (en)
French (fr)
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李绥龙
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中兴通讯股份有限公司
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Publication of WO2011124037A1 publication Critical patent/WO2011124037A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026Transmission of channel quality indication

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method and apparatus for feeding back channel quality indication information. Background technique
  • the Long Term Evolution (LTE) system adopts the channel quality based on the current amount of data to be scheduled and the current user equipment (UE, User Equipment), and the processing of the UE.
  • Resources such as capabilities, using adaptive code modulation (AMC, Adaptive Modulation and Coding) dynamically allocate the most appropriate time-frequency resources to users, and maximize the scheduling strategy of system throughput.
  • AMC refers to adaptively adjusting the modulation mode and coding rate of the transmitted data to compensate for the fading effects of the received signal due to channel variations, thereby improving the signal-to-noise ratio performance of the received signal, and ultimately achieving higher system throughput.
  • the UE In order to implement adaptive coded modulation, the UE needs to feed back channel quality indicator information (CQI, Channel Quality Indicator) to the base station. Since the performance of the AMC is sensitive to measurement error and feedback delay, it is necessary to ensure that the UE is timely and accurate for CQI feedback.
  • CQI Channel Quality Indicator
  • a periodic feedback downlink traffic channel reception quality indication method is generally adopted, and each downlink feedback signal quality measurement is performed in each feedback cycle.
  • the Signal to Interference plus Noise Ratio (SINR) is used to report the CQI index value as a decision basis for AMC scheduling.
  • SINR Signal to Interference plus Noise Ratio
  • the CQI index value may occur due to the drastic change of the transmission channel.
  • the UE side cannot demodulate the high-order modulation mode in the downlink scheduling due to the SINR of the radio channel being too low at the actual receiving time, resulting in failure of data reception during this period of time.
  • the CQI of the CQI feedback or feedback is not accurate, which not only increases the interference of the whole system, but also causes drastic changes in the flow, so that the processing capacity of the system cannot be maximized. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a feedback method and device for channel quality indication information, which can provide the accuracy of channel quality indication information feedback.
  • the present invention adopts the following technical solutions:
  • a method for feeding back channel quality indication information includes: obtaining an index value of channel quality indication information in a current feedback period;
  • the channel quality indication information feedback value of the current feedback period is: the channel quality indication information feedback value of the previous feedback period is corrected according to a preset principle. The resulting correction value.
  • the correction according to the preset principle includes:
  • the channel quality indication information feedback value of the current feedback period is an index value having the highest probability of occurrence in the index value of the channel quality indication information of the current feedback period.
  • Determining, according to an index value of the channel quality indication information, a current channel quality change characteristic includes:
  • the method is applied to a long term evolution system.
  • a feedback device for channel quality indication information including:
  • a channel quality indication information acquiring module configured to acquire an index value of channel quality indication information of a current feedback period
  • a channel quality change feature determining module configured to determine a current channel quality change feature according to an index value of the channel quality indication information
  • the channel quality indication information feedback module is configured to obtain a channel quality indication information feedback value of the current feedback period according to the current channel quality variation characteristic.
  • the channel quality indication information feedback module is specifically configured to indicate that the current channel is a non-fast-changing channel, and the channel quality indication information feedback value of the current feedback period is The correction value obtained by correcting the channel quality indication information feedback value of the previous feedback period according to a preset principle.
  • the channel quality indication information feedback module is specifically configured to represent that the current channel is a fast-changing channel, and the channel quality indication information feedback value of the current feedback period appears in an index value of the channel quality indication information of the current feedback period. The highest probability index value.
  • the invention determines the channel quality change characteristic according to the channel quality indication information index value, and accordingly obtains the channel quality indication information feedback value of the current feedback period, so that the channel quality indication information feedback value is correspondingly adjusted according to the current channel quality, thereby improving The channel quality of the feedback indicates the accuracy of the information.
  • FIG. 1 is a structural block diagram of an embodiment of a feedback apparatus for channel quality indication information according to the present invention.
  • FIG. 1 is a flowchart of an embodiment of a method for feeding back channel quality indication information according to the present invention. detailed description
  • the present invention provides a feedback method and apparatus for CQI, which can correct the feedback value of the CQI according to the channel quality change, thereby improving the feedback value of the CQI.
  • the main methods of feedback include:
  • the invention performs quantitative analysis according to the CQI index value to determine the current quality change characteristic, thereby obtaining a CQI feedback value close to the current actual channel condition, which provides a schedule for the AMC. Accurate decision-making basis, which reduces system interference and increases system capacity.
  • 1 is a structural block diagram of an embodiment of a feedback apparatus for channel quality indication information according to the present invention. As shown in FIG. 1, the method mainly includes: a channel quality indication information acquisition module, a channel quality change feature determination module, and a channel quality indication information feedback module, where ,
  • a channel quality indication information acquiring module configured to acquire an index value of channel quality indication information of a current feedback period
  • a channel quality change feature determining module configured to determine, according to an index value of the channel quality indication information of the module from the channel quality indication information, a current channel quality change feature
  • the channel quality indication information feedback module is configured to determine a current channel quality change characteristic of the module according to the channel quality change characteristic, and obtain a channel quality indication information feedback value of the current feedback period.
  • the device of the present invention may be implemented in a hardware form such as a dedicated chip or a field programmable gate array (FPGA) and integrated in the UE; or may be implemented as an executable program and solidified in the UE.
  • a hardware form such as a dedicated chip or a field programmable gate array (FPGA) and integrated in the UE; or may be implemented as an executable program and solidified in the UE.
  • FPGA field programmable gate array
  • FIG. 1 is a flowchart of an embodiment of a method for feeding back channel quality indication information according to the present invention. As shown in FIG. 2, the method includes the following steps:
  • Step 200 Measure the SINR of the service receiving channel in the current feedback period and obtain a corresponding CQI index value.
  • obtaining the CQI index value according to the SINR is a well-known technique of those skilled in the art.
  • the mapping relationship between the SINR and the CQI can be obtained through simulation, and then the corresponding CQI is obtained from the measured SINR according to the mapping relationship; and the CQI index value is obtained. It is not limited to being obtained by measuring the SINR. For example, it can also be obtained by measuring the signal-to-noise ratio (SNR).
  • SNR signal-to-noise ratio
  • Step 201 Calculate a probability distribution of the value in the feedback period according to the CQI index value of the service receiving channel in the feedback period. That is, the probability of occurrence of each CQI index value in the feedback period is obtained.
  • There are multiple CQI index values in a feedback period which refers to the corresponding CQI of each measurement of the SINR measured in a feedback period. For example, multiple measurement periods are set in one feedback period, and SINR is measured once each measurement period arrives. And get the corresponding CQI.
  • Step 202 Calculate a desired E and a variance D of the CQI index value in the current feedback period according to each CQI index value and its occurrence probability.
  • Step 203 Determine the change level of the current channel according to the variance D of the CQI index value. When it is a fast channel, go to step 204; otherwise, go to step 205.
  • the current channel quality variation feature is determined; see Table 1 below, the variance D of the CQI index value and the preset channel quality threshold (in Table 1, the value is 4; this is the optimal value obtained by the experimental method) , but not limited to only the value) for comparison, when the variance D is less than or equal to the preset channel quality threshold, determining that the current channel is a non-fast-changing channel, including a medium- or slow-changing channel; when the variance D is greater than a preset channel quality threshold, Determine that the current channel is a fast-changing channel.
  • Step 204 If the channel quality change characteristic indicates that the current channel is a fast-changing channel, the CQI index value with a higher probability of occurrence in the current feedback period is selected as the final CQI of the current required feedback, and then proceeds to step 206.
  • Step 205 If the channel quality change characteristic indicates that the current channel is a non-fast-changing channel, the channel quality indication information feedback value of the current feedback period is obtained by correcting the channel quality indication information feedback value of the previous feedback period according to a preset principle. Correction value.
  • Step 206 The UE may feed back the CQI feedback value of the finally obtained current feedback period at the arrival time of the feedback period.
  • the channel quality variation feature is determined by the variance of the CQI index value, but is not limited thereto.
  • the CQI is modified according to the channel quality variation feature, which provides a CQI feedback closer to the actual channel condition, which can provide an accurate decision basis for AMC scheduling, thereby reducing interference and improving system scheduling.
  • Efficiency and throughput Due to the complexity of the channel actual situation, the CQI is modified according to the channel quality variation feature, which provides a CQI feedback closer to the actual channel condition, which can provide an accurate decision basis for AMC scheduling, thereby reducing interference and improving system scheduling. Efficiency and throughput.
  • the SINR value of the received signal of the downlink traffic channel is measured in a statistical period of 5 ms, and the corresponding CQI index value is obtained, and the probability of occurrence of each CQI index value (CQIi, Pi) is calculated as: (10, 0.2), (8, 0.6) , ( 12, 0.2 );
  • the current channel is a fast-changing channel, so the CQI cable with the highest probability of occurrence is selected!
  • the value is used as the CQI feedback value of the current feedback cycle, from the above mentioned bow!
  • the value of the CQI of the value 8 is 0.6, so the CQI feedback value is 8.
  • the UE feeds back a CQI value of 8 at the arrival time of the feedback period.
  • the CQI feedback value of the previous feedback period needs to be corrected according to a preset principle.
  • the difference K l;
  • the UE feeds back the CQI feedback value of the above formula at the arrival time of the feedback period.
  • the method and the device of the present invention can obtain a CQI value that is more accurate and close to the received signal quality of the actual service channel, and provides an accurate basis for AMC scheduling, thereby better ensuring the AMC scheduling function. Effectiveness maximizes system throughput.
  • the present invention can be applied to an LTE system, and is equally applicable to other systems having similar problems. However, this is only an example for ease of understanding, and the specific implementation of the present invention should not be construed as being limited to the description. It is to be understood by those skilled in the art that various changes and substitutions may be made without departing from the spirit and scope of the invention.

Abstract

本发明提供了一种信道质量指示信息的反馈方法及装置,本发明根据信道质量指示信息索引值确定信道质量变化特征,从而相应得出当前反馈周期的信道质量指示信息反馈值,从而使得信道质量指示信息反馈值得以依据当前信道质量而进行相应调整,提高了反馈的信道质量指示信息的准确性。

Description

一种信道质量指示信息的反馈方法及装置 技术领域
本发明涉及无线通信领域, 尤其涉及一种信道质量指示信息的反馈方 法及装置。 背景技术
为了能给用户提供高的下行分组传输数据业务, 长期演进( LTE, Long Term Evolution ) 系统采用了依据当前有待调度的数据量和当前用户设备 ( UE, User Equipment )反馈的信道质量、 UE的处理能力等资源, 利用自 适应编码调制(AMC, Adaptive Modulation and Coding )动态的将最合适的 时频资源分配给用户, 最大限度的提高系统吞吐量的调度策略。 AMC是指 自适应的调整传输数据的调制方式和编码速率, 以补偿由于信道变化对接 收信号造成的衰落影响, 进而提高接收信号的信噪比性能, 最终获得较高 的系统吞吐量。
为了实现自适应编码调制,需要 UE将信道质量指示信息( CQI, Channel Quality Indicator )反馈给基站。 由于 AMC的性能对于测量误差和反馈延迟 都较为敏感, 因而需要保证 UE对于 CQI反馈的及时、 准确。
目前, 在 LTE系统中, 为了更好的提高下行业务信道的利用率和 AMC 的性能, 通常采用周期反馈下行业务信道接收质量指示的方式, 在每一反 馈周期, 依据一次下行接收信号质量测量的信号与干扰加噪声比 (SINR ) 来上报 CQI索引值以作为 AMC调度的决策依据。但是, 由于 UE测量的下 行信道传输质量及反馈的 CQI需要等待反馈上报周期到达才可以发送, 而 调度算法的处理粒度显然大于一个上报周期, 再加上信道自身的特点 (如 快衰落), 如果只是简单的依据一次下行接收信号质量测量的 SINR来上报 CQI索引值, 可能出现因为传输信道的剧烈变化, UE侧因实际接收时刻无 线信道过低的 SINR, 无法解调下行调度中高阶的调制方式, 导致这一段时 间内数据接收失败, 从而不能给予及时的 CQI反馈或反馈的 CQI不准确, 这样不仅增大了整个系统的干扰, 还出现了流量的剧烈变化, 从而不能最 大限度的提高系统的处理能力。 发明内容
本发明所要解决的技术问题是: 提供一种信道质量指示信息的反馈方 法及装置 , 能够提供信道质量指示信息反馈的准确性。
为了解决上述技术问题, 本发明采用了如下技术方案:
一种信道质量指示信息的反馈方法, 包括: 获取当前反馈周期内的信 道质量指示信息的索引值;
根据所述信道质量指示信息的索引值确定当前信道质量变化特征; 根据当前信道质量变化特征得出当前反馈周期的信道质量指示信息反 馈值。
所述的根据当前信道质量变化特征得出当前反馈周期的信道质量指示 信息反馈值包括:
如果所述当前信道质量变化特征表征当前信道为非快变信道, 则所述 当前反馈周期的信道质量指示信息反馈值为: 前一反馈周期的信道质量指 示信息反馈值按预设原则进行修正而得出的修正值。
所述按预设原则进行修正包括:
分别获取当前反馈周期和前一反馈周期的信道质量指示信息的索引值 基于出现概率而得到的期望值;
计算当前反馈周期的信道质量指示信息索引值的期望值与前一反馈周 期的信道质量指示信息索引值的期望值之间的差值, 将所述差值与前一反 馈周期的信道质量指示信息反馈值的和作为当前反馈周期的信道质量指示 信息反馈值。
所述根据当前信道质量变化特征得出当前反馈周期的信道质量指示信 息反馈值包括:
如果所述当前信道质量变化特征表征当前信道为快变信道, 则所述当 前反馈周期的信道质量指示信息反馈值为当前反馈周期的信道质量指示信 息的索引值中出现概率最高的索引值。
所述根据信道质量指示信息的索引值确定当前信道质量变化特征包 括:
基于所述信道质量指示信息的索引值的出现概率计算所述信道质量指 示信息索引值的方差;
比较所述方差与预设信道质量阈值, 当所述方差小于等于所述预设信 道质量阈值, 确定当前信道为非快变信道; 当所述方差大于所述预设信道 质量阈值, 确定当前信道为快变信道。
通过测量下行业务信道接收信号的信号干扰噪声比, 获取所述当前反 馈周期的信道质量指示信息的索引值。
所述方法应用于长期演进系统。
一种信道质量指示信息的反馈装置, 包括:
信道质量指示信息获取模块, 用于获取当前反馈周期的信道质量指示 信息的索引值;
信道质量变化特征确定模块, 用于根据所述信道质量指示信息的索引 值确定当前信道质量变化特征;
信道质量指示信息反馈模块, 用于根据当前信道质量变化特征得出当 前反馈周期的信道质量指示信息反馈值。
所述信道质量指示信息反馈模块, 具体用于当前信道质量变化特征表 征当前信道为非快变信道, 则当前反馈周期的信道质量指示信息反馈值为 前一反馈周期的信道质量指示信息反馈值按预设原则进行修正而得出的修 正值。
所述信道质量指示信息反馈模块, 具体用于当前信道质量变化特征表 征当前信道为快变信道, 则当前反馈周期的信道质量指示信息反馈值为当 前反馈周期的信道质量指示信息的索引值中出现概率最高的索引值。
本发明根据信道质量指示信息索引值确定信道质量变化特征, 从而相 应得出当前反馈周期的信道质量指示信息反馈值, 从而使得信道质量指示 信息反馈值得以依据当前信道质量而进行相应调整, 提高了反馈的信道质 量指示信息的准确性。 附图说明
图 1是本发明信道质量指示信息的反馈装置的实施例的结构框图; 图 1是本发明信道质量指示信息的反馈方法的实施例的流程图。 具体实施方式
下面对照附图并结合具体实施方式对本发明做详细说明。
如果在反馈周期内, 信道质量发生剧烈变化, 将可能导致 CQI的反馈 值准确性下降, 从而使 AMC性能降低。 为此, 本发明提供了一种 CQI的 反馈方法及装置, 能够依据信道质量变化而相应修正 CQI的反馈值, 从而 提高 CQI的反馈值。 其反馈方法的主要包括:
获取当前反馈周期的信道质量指示信息的索引值;
根据获得的信道质量指示信息的索引值确定当前信道质量变化特征; 根据当前信道质量变化特征得出当前反馈周期的信道质量指示信息反 馈值。
本发明由于依据 CQI索引值进行量化分析,确定出当前质量变化特征, 从而得出了接近当前实际信道条件的 CQI反馈值, 为 AMC的调度提供了 准确的决策依据, 从而降低了系统的干扰, 提高了系统的容量。 图 1 是本发明信道质量指示信息的反馈装置的实施例的结构框图, 如 图 1 所示, 主要包括: 信道质量指示信息获取模块、 信道质量变化特征确 定模块、 信道质量指示信息反馈模块, 其中,
信道质量指示信息获取模块, 用于获取当前反馈周期的信道质量指示 信息的索引值;
信道质量变化特征确定模块, 用于根据来自信道质量指示信息获取模 块的信道质量指示信息的索引值, 确定当前信道质量变化特征;
信道质量指示信息反馈模块, 用于根据来自信道质量变化特征确定模 块的当前信道质量变化特征, 得出当前反馈周期的信道质量指示信息反馈 值。
本发明装置,适宜的,可以通过专用芯片或现场可编程门阵列(FPGA ) 等硬件形式实现并集成于 UE中; 也可以作为一段可执行程序, 固化于 UE 中。
图 1是本发明信道质量指示信息的反馈方法的实施例的流程图, 如图 2所示, 包括以下步驟:
步驟 200: 测量当前反馈周期内业务接收信道的 SINR并获取对应的 CQI索引值。
本步驟中, 根据 SINR获取 CQI索引值为本领域技术人员的熟知技术, 例如可以通过仿真得到 SINR与 CQI的映射关系, 而后根据映射关系由测 量的 SINR得出对应的 CQI; CQI索引值的获取也不限于通过测量 SINR得 到, 例如也可以通过信噪比(SNR ) 的测量得到等。
步驟 201 : 依据反馈周期内业务接收信道的 CQI索引值, 计算其在反 馈周期内数值的概率分布。 也即得出反馈周期内的各个 CQI索引值的出现 概率。 一个反馈周期中有多个 CQI索引值,指一个反馈周期内多次测量 SINR 的各次测量的对应 CQI, 例如在一个反馈周期内设置多个测量周期, 每一 测量周期到达时测量一次 SINR, 并获取对应的 CQI。
步驟 202: 依据各个 CQI索引值及其出现概率, 计算当前反馈周期内 的 CQI索引值的期望 E和方差 D。
步驟 203: 依据 CQI索引值的方差 D, 判定当前信道的变化等级, 当 为快速信道时, 进入步驟 204; 否这进入步驟 205。
本步驟中, 确定当前的信道质量变化特征; 参见下表 1 , 将 CQI索引 值的方差 D与预设信道质量阈值(表 1 中, 该值为 4; 此为实验方式得出 的较优值, 但不限于只能取该值)进行比较, 当方差 D小于等于预设信道 质量阈值, 确定当前信道为非快变信道, 包括中变或慢变信道; 当方差 D 大于预设信道质量阈值, 确定当前信道为快变信道。
Figure imgf000008_0001
表 1
步驟 204: 如果信道质量变化特征表征当前信道为快变信道, 则选取当 前反馈周期内出现概率较高的 CQI索引值作为最终得出的此次需要反馈的 CQI, 之后进入步驟 206。
步驟 205: 如果信道质量变化特征表征当前信道为非快变信道, 则当前 反馈周期的信道质量指示信息反馈值为前一反馈周期的信道质量指示信息 反馈值按预设原则进行修正而得出的修正值。
其中, 按预设原则进行修正包括: 分别获取当前反馈周期和前一反馈 周期的 CQI索引值基于其出现概率而得到的期望值; 计算当前反馈周期的 CQI索引值的期望值与前一反馈周期的 CQI信息索引值的期望值之间的差 值, 即差值 =当前反馈周期的 CQI期望值-前一反馈周期的 CQI期望值; 值, 即当前反馈周期的 CQI反馈值 =前一反馈周期的 CQI反馈值 +K, 也就 是说 , 当前反馈周期的信道质量指示信息反馈值是在前一反馈周期的信道 质量指示信息反馈值通过差值 κ进行修正而得出的修正值。
步驟 206: UE可以在反馈周期到达时刻反馈上述最终得出的当前反馈 周期的 CQI反馈值。
需要说明的是, 在本实施例中, 信道质量变化特征通过 CQI索引值的 方差来确定, 但不限于此。
由于考虑了信道实际情况的复杂性, 依据信道质量变化特征来修正 CQI,提供了一个更加接近实际信道条件的 CQI反馈, 可以为 AMC调度提 供准确的决策依据, 从而可以降低干扰, 提高系统的调度的效率和吞吐量。
下面通过两个应用实例对本发明故进一步说明。
应用实例 1: CQI的反馈周期为 Lcqi=5ms;
以 5ms为统计周期, 测量下行业务信道接收信号的 SINR数值, 并获 取对应的 CQI索引值, 统计各个 CQI索引值出现的概率 (CQIi, Pi ) 为: ( 10, 0.2 ), ( 8, 0.6 ), ( 12, 0.2 );
计算得出当前反馈周期内 CQI的期望 E=6, 方差 D=9.62;
通过表 1判断当前信道为快变信道, 因而选取出现概率最高的 CQI索 弓!值作为当前反馈周期的 CQI反馈值, 从上述索弓!值可知, 数值 8的 CQI 出现概率为 0.6 , 因而 CQI反馈值 =8。
UE在反馈周期到达时刻反馈 CQI数值为 8。
应用实例 2: CQI的反馈周期为 Lcqi=10ms;
以 10ms为统计周期, 测量下行业务信道接收信号的 SINR数值, 并获 取对应的 CQI索引值, 统计各个 CQI索引值出现的概率 (CQIi, Pi ) 为: ( 10, 0.5 ), ( 9, 0.2 ), ( 8, 0.1 )、 (11 , 0.1 )、 (12, 0.1 ); 计算得出当前反馈周期内 CQI的期望 E=10, 方差 D=l ;
通过表 1 判断当前信道为非快变信道, 因而需按预设原则对前一反馈 周期的 CQI反馈值进行修正, 首先计算差值 K, 假设前一反馈周期的 CQI 期望值 E=9, 得出差值 K=l ;
当前反馈 CQI=前一反馈 CQI+K;
UE在反馈周期到达时刻, 将上式的 CQI反馈值进行反馈。
采用本发明所述方法和装置, 与现有技术相比, 能够得到更加准确、 接近实际业务信道接收信号质量的 CQI值, 为 AMC调度提供了准确的依 据,从而更好的保证 AMC调度功能的有效性, 最大限度的提升了系统的吞 吐量。 本发明可以应用于 LTE系统, 同样可以适用于具有类似问题的其他 系统中。 明, 但这只是为便于理解而举的实例, 不应认为本发明的具体实施只局限 于这些说明。 对于本发明所属技术领域的普通技术人员来说, 在不脱离本 发明构思的前提下, 可以做出各种可能的等同改变或替换, 这些改变或替 换都应属于本发明的保护范围。

Claims

权利要求书
1、 一种信道质量指示信息的反馈方法, 其特征在于, 包括: 获取当前反馈周期内的信道质量指示信息的索引值;
根据所述信道质量指示信息的索引值确定当前信道质量变化特征; 根据当前信道质量变化特征得出当前反馈周期的信道质量指示信息反 馈值。
2、 根据权利要求 1所述的方法, 其特征在于, 所述的根据当前信道质 量变化特征得出当前反馈周期的信道质量指示信息反馈值包括:
如果所述当前信道质量变化特征表征当前信道为非快变信道, 则所述 当前反馈周期的信道质量指示信息反馈值为: 前一反馈周期的信道质量指 示信息反馈值按预设原则进行修正而得出的修正值。
3、 根据权利要求 2所述的方法, 其特征在于, 所述按预设原则进行修 正包括:
分别获取当前反馈周期和前一反馈周期的信道质量指示信息的索引值 基于出现概率而得到的期望值;
计算当前反馈周期的信道质量指示信息索引值的期望值与前一反馈周 期的信道质量指示信息索引值的期望值之间的差值, 将所述差值与前一反 馈周期的信道质量指示信息反馈值的和作为当前反馈周期的信道质量指示 信息反馈值。
4、 根据权利要求 1所述的方法, 其特征在于, 所述根据当前信道质量 变化特征得出当前反馈周期的信道质量指示信息反馈值包括:
如果所述当前信道质量变化特征表征当前信道为快变信道, 则所述当 前反馈周期的信道质量指示信息反馈值为当前反馈周期的信道质量指示信 息的索引值中出现概率最高的索引值。
5、 根据权利要求 1~4任一项所述的方法, 其特征在于, 所述根据信道 质量指示信息的索引值确定当前信道质量变化特征包括:
基于所述信道质量指示信息的索引值的出现概率计算所述信道质量指 示信息索引值的方差;
比较所述方差与预设信道质量阈值, 当所述方差小于等于所述预设信 道质量阈值, 确定当前信道为非快变信道; 当所述方差大于所述预设信道 质量阈值, 确定当前信道为快变信道。
6、 根据权利要求 5所述的方法, 其特征在于, 通过测量下行业务信道 接收信号的信号干扰噪声比, 获取所述当前反馈周期的信道质量指示信息 的索引值。
7、 根据权利要求 6所述的方法, 其特征在于, 所述方法应用于长期演 进系统。
8、 一种信道质量指示信息的反馈装置, 其特征在于, 包括: 信道质量指示信息获取模块, 用于获取当前反馈周期的信道质量指示 信息的索引值;
信道质量变化特征确定模块, 用于根据所述信道质量指示信息的索引 值确定当前信道质量变化特征;
信道质量指示信息反馈模块, 用于根据当前信道质量变化特征得出当 前反馈周期的信道质量指示信息反馈值。
9、 根据权利要求 8所述的装置, 其特征在于, 所述信道质量指示信息 反馈模块, 具体用于当前信道质量变化特征表征当前信道为非快变信道, 则当前反馈周期的信道质量指示信息反馈值为前一反馈周期的信道质量指 示信息反馈值按预设原则进行修正而得出的修正值。
10、 根据权利要求 8所述的装置, 其特征在于, 所述信道质量指示信 息反馈模块, 具体用于当前信道质量变化特征表征当前信道为快变信道, 则当前反馈周期的信道质量指示信息反馈值为当前反馈周期的信道质量指 示信息的索引值中出现概率最高的索引值。
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CN1809048A (zh) * 2006-02-16 2006-07-26 上海交通大学 信道质量反馈信息的简化表征方法

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* Cited by examiner, † Cited by third party
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CN1662097A (zh) * 2004-02-26 2005-08-31 三星电子株式会社 控制信道质量信息传输的方法和装置
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