WO2012142885A1 - Method and system for determining channel quality indicator - Google Patents

Method and system for determining channel quality indicator Download PDF

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Publication number
WO2012142885A1
WO2012142885A1 PCT/CN2012/072191 CN2012072191W WO2012142885A1 WO 2012142885 A1 WO2012142885 A1 WO 2012142885A1 CN 2012072191 W CN2012072191 W CN 2012072191W WO 2012142885 A1 WO2012142885 A1 WO 2012142885A1
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Prior art keywords
pilot signal
sub
band
transmitting
receiving
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PCT/CN2012/072191
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French (fr)
Chinese (zh)
Inventor
张帅
许进
郁光辉
梁春丽
郝鹏
戴博
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中兴通讯股份有限公司
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Publication of WO2012142885A1 publication Critical patent/WO2012142885A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a method and system for determining a channel quality indicator.
  • wireless hotspot transmission technology Today, with the rapid development of mobile broadband, wireless hotspot transmission technology has received more and more attention. Unlike ordinary third-generation mobile communication technologies, wireless hotspot transmissions usually have larger transmission bandwidth and higher data throughput. Take the IEEE Institute of Electrical and Electronics Engineers (802.1 lac technology) as an example. The maximum transmission bandwidth can reach 160 megabytes. The peak transmission rate can exceed 3G bps (bits per second). Wireless data communication solutions for hotspots.
  • the present invention uses the following technical solutions:
  • a method of determining a channel quality indication comprising:
  • the transmitting end sends a pilot signal to the receiving end
  • the receiving end After receiving the channel measurement on the sub-band carrying the pilot signal, the receiving end feeds back the obtained channel quality indicator of the sub-band to the transmitting end.
  • the step of the transmitting end transmitting the pilot signal to the receiving end includes:
  • the transmitting end transmits a pilot signal in each sub-band.
  • the step of the transmitting end transmitting the pilot signal to the receiving end includes:
  • the transmitting end transmits the pilot signal only on a portion of the sub-band.
  • the subcarriers included in each subband are pre-configured at the transmitting end and/or the receiving end.
  • a system for determining a channel quality indicator includes a sending module and a receiving module, where: the sending module is configured to: send a pilot signal to the receiving module;
  • the receiving module is configured to: after performing channel measurement on the sub-band carrying the pilot signal, and feeding back the obtained channel quality indicator of the sub-band to the sending module.
  • the sending module is configured to send a pilot signal to the receiving module in the following manner: transmitting a pilot signal in each sub-band.
  • the sending module is configured to send a pilot signal to the receiving module in the following manner: transmitting a pilot signal only on a part of the sub-band.
  • the subcarriers included in each subband are pre-configured in the transmitting module and/or the interface Receive the module.
  • the receiving device is configured to: receive a pilot signal sent by a transmitting end, perform channel measurement on a sub-band carrying a pilot signal, and feed back the obtained channel quality indicator of the sub-band to the The sender.
  • the subcarriers included in each subband are pre-configured at the transmitting end and/or the receiving device.
  • a transmitting apparatus wherein the transmitting apparatus is configured to: transmit a pilot signal to a receiving end in each sub-band, or transmit a pilot signal to the receiving end only on a part of a sub-band.
  • the subcarriers included in each subband are pre-configured at the transmitting device and/or the receiving end.
  • the transmitting end can be sure to know the CQI in different sub-bands, and provide a basis for subsequent selection of appropriate modulation and coding modes on different sub-bands to obtain the gain of adaptive coding modulation.
  • FIG. 1 is a flowchart of a method for determining a channel quality indicator in an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a system in which a transmitting end transmits a pilot signal and a receiving end feeds back a CQI to a transmitting end in an application example of the present invention.
  • Preferred embodiment of the invention
  • the Channel Quality Indicator is a measurement standard for the communication quality of a wireless channel.
  • a high value CQI indicates that the channel quality is better, and vice versa.
  • the CQI for a channel can be reflected by the following performance indicators: Signal-to-Noise Ratio (SNR), Signal and Interference plus Noise ratio (SINR), signal to noise distortion ratio (SNDR). These values are calculated by measuring a given channel.
  • SNR Signal-to-Noise Ratio
  • SINR Signal and Interference plus Noise ratio
  • SNDR signal to noise distortion ratio
  • a method for determining a channel quality indicator includes the following steps:
  • the transmitting end sends a pilot signal to the receiving end
  • the transmitting end may send the pilot signal in each sub-band, or may only transmit the pilot signal on a part of the sub-band;
  • the receiving end After receiving the channel measurement on the sub-band carrying the pilot signal, the receiving end feeds back the obtained CQI of the sub-band to the transmitting end.
  • the subcarriers included in each subband are pre-configured at the transmitting end and/or the receiving end.
  • a system for determining a channel quality indication includes a transmitting end and a receiving end, wherein:
  • the sending end is configured to: send a pilot signal to the receiving end;
  • the receiving end is configured to: after performing channel measurement on the sub-band carrying the pilot signal, feed back the obtained channel quality indicator of the sub-band to the transmitting end.
  • the transmitting end is arranged to transmit a pilot signal to the receiving end in the following manner: transmitting a pilot signal in each sub-band.
  • the transmitting end is arranged to transmit a pilot signal to the receiving end in such a manner that the pilot signal is transmitted only on a portion of the sub-band.
  • a method of determining a channel quality indicator includes:
  • the transmitting end sends a pilot signal to the receiving end
  • the receiving end After the receiving end performs channel measurement on the sub-band carrying the pilot signal, the obtained sub-frequency The channel quality indication of the band is fed back to the transmitting end.
  • the step of the transmitting end transmitting the pilot signal to the receiving end includes:
  • the transmitting end transmits a pilot signal in each sub-band.
  • the step of the transmitting end transmitting the pilot signal to the receiving end includes:
  • the transmitting end transmits the pilot signal only on a portion of the sub-band.
  • the subcarriers included in each subband are pre-configured at the transmitting end and/or the receiving end.
  • a system for determining a channel quality indicator includes a transmitting module and a receiving module, wherein:
  • the sending module is configured to: send a pilot signal to the receiving module;
  • the receiving module is configured to: after performing channel measurement on the sub-band carrying the pilot signal, and feeding back the obtained channel quality indicator of the sub-band to the sending module.
  • the sending module is configured to send a pilot signal to the receiving module in the following manner: transmitting a pilot signal in each sub-band.
  • the sending module is configured to send a pilot signal to the receiving module in the following manner: transmitting a pilot signal only on a part of the sub-band.
  • the subcarriers included in each subband are pre-configured in the transmitting module and/or the receiving module.
  • a receiving device is configured to: receive a pilot signal sent by a transmitting end, perform channel measurement on a sub-band carrying a pilot signal, and obtain the obtained sub-band The channel quality indication is fed back to the transmitting end.
  • the subcarriers included in each subband are pre-configured at the transmitting end and/or the receiving device.
  • a transmitting device configured to: transmit a pilot signal to a receiving end in each sub-band, or transmit a pilot signal to the receiving end only on a portion of the sub-band.
  • subcarriers included in each subband are pre-configured in the transmitting device and/or the Received.
  • the transmitting end transmits a pilot signal to the receiving end.
  • There are four sub-bands in the transmission bandwidth where sub-band 1 corresponds to sub-carrier 0 ⁇ , sub-band 2 corresponds to sub-carrier / iy ⁇ sub-band 3 corresponds to sub-carrier / 2 ⁇ / 3 , sub-band 4 corresponds to sub-carrier / 3 ⁇ ⁇ , where 0, , / 2 , / 3, and / 4 represent subcarrier index values, respectively.
  • the receiving end After receiving the pilot signal, the receiving end performs signal measurement on the four sub-bands, and then feeds back the corresponding CQI values of the four sub-bands obtained after the measurement to the transmitting end.
  • the channel quality indicator (CQI) values corresponding to the four sub-bands are: CQI, CQI 2 , CQI 3, and CQI 4 , respectively .
  • the transmitting end can be sure to know the CQI in different sub-bands, and provide a basis for subsequent selection of appropriate modulation and coding modes on different sub-bands to obtain the gain of adaptive coding modulation. Therefore, the present invention has strong industrial applicability.

Abstract

A method and system for determining channel quality indicator. The method includes: a sending end sending to a receiving end a pilot signal; the receiving end feeding back to the sending end the obtained channel quality indicator of a sub-band carrying the pilot signal after performing channel measurement on the sub-band. By adopting the technical solution above, it can be ensured that the sending end learns the CQIs on different sub-bands, providing a basis for selecting a suitable modulation and coding manner subsequently on different sub-bands so as to acquire the gain of adaptive modulation and coding.

Description

一种确定信道质量指示的方法及系统  Method and system for determining channel quality indication
技术领域 Technical field
本发明涉及移动通信领域， 尤其涉及一种确定信道质量指示的方法及系 统。  The present invention relates to the field of mobile communications, and in particular, to a method and system for determining a channel quality indicator.
背景技术 Background technique
在移动通信系统中， 由于无线衰落信道时变的特点， 使得通信过程存在 大量的不确定性。 为了提高系统吞吐量， 通常釆用传输速率较高的高阶调制 和少冗余纠错码进行通信， 这样在无线衰落信道信噪比比较理想时系统吞吐 量得到了很大的提高， 但当信道处于深衰落时则无法保障通信可靠稳定地 进行； 而为了保障通信的可靠性， 通常釆用传输速率较低的低阶调制和大冗 余纠错码进行通信， 即在无线信道处于深衰落时保障通信可靠稳定的进行， 但当信道信噪比较高时， 由于传输速率较低， 制约了系统吞吐量的提高， 从 而造成了资源的浪费。  In mobile communication systems, due to the time-varying characteristics of wireless fading channels, there is a large amount of uncertainty in the communication process. In order to improve the system throughput, high-order modulation with high transmission rate and less redundant error correction code are usually used for communication, so that the system throughput is greatly improved when the signal-to-noise ratio of the wireless fading channel is ideal, but when When the channel is in deep fading, communication cannot be guaranteed to be reliable and stable. In order to ensure the reliability of communication, low-order modulation with low transmission rate and large redundant error correction code are usually used for communication, that is, the wireless channel is in deep fading. The communication is guaranteed to be reliable and stable, but when the channel signal-to-noise ratio is relatively high, the transmission rate is low, which limits the improvement of the system throughput, thereby causing waste of resources.
在移动通信技术发展的早期阶段， 为对抗无线衰落信道的时变特性， 只 能釆用加大发射机的发射功率并使用低阶大冗余的调制编码方法来保障系统 在信道深衰落时的通信质量， 还无暇考虑如何提高系统的吞吐量。 随着技术 水平的不断进步， 出现了可根据信道状态自适应地调节发射机的发射功率、 调制编码方式以及数据的帧长以克服信道的时变特性从而获得最佳通信效果 的技术， 该技术被称为自适应技术。  In the early stage of the development of mobile communication technology, in order to combat the time-varying characteristics of wireless fading channels, only the transmission power of the transmitter can be increased and the modulation coding method of low-order and large redundancy can be used to ensure the system in the deep fading of the channel. Communication quality, there is no way to consider how to improve the throughput of the system. With the continuous advancement of the technical level, there has been a technology that can adaptively adjust the transmission power of the transmitter, the modulation and coding mode, and the frame length of the data according to the channel state to overcome the time-varying characteristics of the channel, thereby obtaining an optimal communication effect. It is called adaptive technology.
在移动宽带高速发展的今天， 无线热点传输技术受到了更广泛的关注。 不同于普通的第三代移动通信技术， 无线热点传输通常有着更大的传输带宽 和更高的数据吞吐量。 以美国电气和电子工程师协会（ IEEE , Institute of Electrical and Electronics Engineers ) 802.1 lac技术为例， 其最大传输带宽可 以达到 160兆， 峰值传输速率可以超过 3G bps (位 /秒）， 可提供多种室内和 热点地区的无线数据通信方案。  Today, with the rapid development of mobile broadband, wireless hotspot transmission technology has received more and more attention. Unlike ordinary third-generation mobile communication technologies, wireless hotspot transmissions usually have larger transmission bandwidth and higher data throughput. Take the IEEE Institute of Electrical and Electronics Engineers (802.1 lac technology) as an example. The maximum transmission bandwidth can reach 160 megabytes. The peak transmission rate can exceed 3G bps (bits per second). Wireless data communication solutions for hotspots.
虽然室内环境通常比较稳定， 但是由于传输带宽大， 信道的频率选择性 效应仍然不可避免，而在 IEEE 802.1 lac等技术中却没有考虑这一点。例如， 在 IEEE 802.11ac中每个用户的数据都是在全带宽上传输的， 而信道质量的 上报也都是针对整个带宽范围的。 发明内容 Although the indoor environment is generally stable, the frequency selective effect of the channel is still unavoidable due to the large transmission bandwidth, but this is not considered in technologies such as IEEE 802.1 lac. E.g, In IEEE 802.11ac, each user's data is transmitted over the full bandwidth, and the channel quality is reported for the entire bandwidth. Summary of the invention
本发明的目的在于提供一种确定信道质量指示的方法及系统， 以克服现 有只能针对整个带宽范围进行信道质量上报的缺陷。  It is an object of the present invention to provide a method and system for determining a channel quality indication to overcome the deficiencies inherent in channel quality reporting only for the entire bandwidth range.
为解决上述问题， 本发明釆用如下技术方案：  In order to solve the above problems, the present invention uses the following technical solutions:
一种确定信道质量指示的方法， 包括：  A method of determining a channel quality indication, comprising:
发送端向接收端发送导频信号；  The transmitting end sends a pilot signal to the receiving end;
接收端对承载有导频信号的子频带进行信道测量后， 将得到的所述子频 带的信道质量指示反馈给所述发送端。  After receiving the channel measurement on the sub-band carrying the pilot signal, the receiving end feeds back the obtained channel quality indicator of the sub-band to the transmitting end.
其中， 发送端向接收端发送导频信号的步骤包括：  The step of the transmitting end transmitting the pilot signal to the receiving end includes:
所述发送端在各子频带内发送导频信号。  The transmitting end transmits a pilot signal in each sub-band.
其中， 发送端向接收端发送导频信号的步骤包括：  The step of the transmitting end transmitting the pilot signal to the receiving end includes:
所述发送端仅在部分子频带上发送导频信号。  The transmitting end transmits the pilot signal only on a portion of the sub-band.
其中：各子频带所包含的子载波是预先配置在所述发送端和 /或所述接收 端的。  Wherein: the subcarriers included in each subband are pre-configured at the transmitting end and/or the receiving end.
一种确定信道质量指示的系统， 包括发送模块和接收模块， 其中： 所述发送模块设置成： 向所述接收模块发送导频信号；  A system for determining a channel quality indicator includes a sending module and a receiving module, where: the sending module is configured to: send a pilot signal to the receiving module;
所述接收模块设置成： 对承载有导频信号的子频带进行信道测量后， 将 得到的所述子频带的信道质量指示反馈给所述发送模块。  The receiving module is configured to: after performing channel measurement on the sub-band carrying the pilot signal, and feeding back the obtained channel quality indicator of the sub-band to the sending module.
其中，所述发送模块设置成按照以下方式向所述接收模块发送导频信号： 在各子频带内发送导频信号。  The sending module is configured to send a pilot signal to the receiving module in the following manner: transmitting a pilot signal in each sub-band.
其中，所述发送模块设置成按照以下方式向所述接收模块发送导频信号： 仅在部分子频带上发送导频信号。  The sending module is configured to send a pilot signal to the receiving module in the following manner: transmitting a pilot signal only on a part of the sub-band.
其中：各子频带所包含的子载波是预先配置在所述发送模块和 /或所述接 收模块的。 Wherein: the subcarriers included in each subband are pre-configured in the transmitting module and/or the interface Receive the module.
一种接收装置， 所述接收装置设置成： 接收发送端发送的导频信号， 对 承载有导频信号的子频带进行信道测量后， 将得到的所述子频带的信道质量 指示反馈给所述发送端。  a receiving device, the receiving device is configured to: receive a pilot signal sent by a transmitting end, perform channel measurement on a sub-band carrying a pilot signal, and feed back the obtained channel quality indicator of the sub-band to the The sender.
其中，各子频带所包含的子载波是预先配置在所述发送端和 /或所述接收 装置的。  The subcarriers included in each subband are pre-configured at the transmitting end and/or the receiving device.
一种发送装置， 所述发送装置设置成： 在各子频带内向接收端发送导频 信号， 或者， 仅在部分子频带上向所述接收端发送导频信号。  A transmitting apparatus, wherein the transmitting apparatus is configured to: transmit a pilot signal to a receiving end in each sub-band, or transmit a pilot signal to the receiving end only on a part of a sub-band.
其中，各子频带所包含的子载波是预先配置在所述发送装置和 /或所述接 收端的。  The subcarriers included in each subband are pre-configured at the transmitting device and/or the receiving end.
釆用上述技术方案后， 能保证发送端获知不同子频带上的 CQI, 为后续 在不同子频带上选择合适的调制编码方式提供了基础， 以获得自适应编码调 制的增益。 附图概述 After using the above technical solution, the transmitting end can be sure to know the CQI in different sub-bands, and provide a basis for subsequent selection of appropriate modulation and coding modes on different sub-bands to obtain the gain of adaptive coding modulation. BRIEF abstract
图 1是本发明实施例中确定信道质量指示的方法流程图；  1 is a flowchart of a method for determining a channel quality indicator in an embodiment of the present invention;
图 2 是本发明应用示例中发送端发送导频信号， 接收端向发送端反馈 CQI的系统示意图。 本发明的较佳实施方式  2 is a schematic diagram of a system in which a transmitting end transmits a pilot signal and a receiving end feeds back a CQI to a transmitting end in an application example of the present invention. Preferred embodiment of the invention
为使本发明的目的、 技术方案和优点更加清楚明白， 下文中将结合附图 对本发明的实施例进行详细说明。 需要说明的是， 在不冲突的情况下， 本申 请中的实施例及实施例中的特征可以相互任意组合。 这些组合均在本发明的 保护范围内。  In order to make the objects, the technical solutions and the advantages of the present invention more clearly, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments of the present application may be arbitrarily combined with each other. These combinations are all within the scope of the invention.
信道质量指示（CQI, Channel Quality Indicator )是无线信道的通信质量 的测量标准。 一个高值的 CQI表示信道的质量较好， 反之亦然。 对一个信 道的 CQI 能够通过如下性能指标来反映： 信噪比 （SNR ) 、 信号与干扰加 噪声比 （SINR ) 、 信号与噪声失真比 （SNDR ) 。 这些值都是通过对一个给 定的信道进行测量后计算得到的。 The Channel Quality Indicator (CQI) is a measurement standard for the communication quality of a wireless channel. A high value CQI indicates that the channel quality is better, and vice versa. The CQI for a channel can be reflected by the following performance indicators: Signal-to-Noise Ratio (SNR), Signal and Interference plus Noise ratio (SINR), signal to noise distortion ratio (SNDR). These values are calculated by measuring a given channel.
在本实施例中， 一种确定信道质量指示的方法， 如图 1所示， 包括以下 步骤：  In this embodiment, a method for determining a channel quality indicator, as shown in FIG. 1, includes the following steps:
a、 发送端向接收端发送导频信号；  a, the transmitting end sends a pilot signal to the receiving end;
其中， 发送端可以是在各子频带内发送导频信号， 也可以仅在部分子频 带上发送导频信号；  The transmitting end may send the pilot signal in each sub-band, or may only transmit the pilot signal on a part of the sub-band;
b、接收端对承载有导频信号的子频带进行信道测量后，将得到的该子频 带的 CQI反馈给发送端。  b. After receiving the channel measurement on the sub-band carrying the pilot signal, the receiving end feeds back the obtained CQI of the sub-band to the transmitting end.
在本发明的另一实施例中， 各子频带所包含的子载波是预先配置在上述 发送端和 /或接收端的。  In another embodiment of the present invention, the subcarriers included in each subband are pre-configured at the transmitting end and/or the receiving end.
在另一实施例中，一种确定信道质量指示的系统，包括发送端和接收端， 其中：  In another embodiment, a system for determining a channel quality indication includes a transmitting end and a receiving end, wherein:
所述发送端设置成： 向接收端发送导频信号；  The sending end is configured to: send a pilot signal to the receiving end;
所述接收端设置成： 对承载有导频信号的子频带进行信道测量后， 将得 到的所述子频带的信道质量指示反馈给所述发送端。  The receiving end is configured to: after performing channel measurement on the sub-band carrying the pilot signal, feed back the obtained channel quality indicator of the sub-band to the transmitting end.
较佳地，  Preferably,
所述发送端设置成按照以下方式向所述接收端发送导频信号： 在各子频 带内发送导频信号。  The transmitting end is arranged to transmit a pilot signal to the receiving end in the following manner: transmitting a pilot signal in each sub-band.
较佳地，  Preferably,
所述发送端设置成按照以下方式向所述接收端发送导频信号： 仅在部分 子频带上发送导频信号。  The transmitting end is arranged to transmit a pilot signal to the receiving end in such a manner that the pilot signal is transmitted only on a portion of the sub-band.
较佳地，  Preferably,
各子频带所包含的子载波是预先配置在所述发送端和 /或接收端的。 在另一实施例中， 一种确定信道质量指示的方法， 包括：  The subcarriers included in each subband are pre-configured at the transmitting end and/or the receiving end. In another embodiment, a method of determining a channel quality indicator includes:
发送端向接收端发送导频信号；  The transmitting end sends a pilot signal to the receiving end;
接收端对承载有导频信号的子频带进行信道测量后， 将得到的所述子频 带的信道质量指示反馈给所述发送端。 After the receiving end performs channel measurement on the sub-band carrying the pilot signal, the obtained sub-frequency The channel quality indication of the band is fed back to the transmitting end.
其中， 发送端向接收端发送导频信号的步骤包括：  The step of the transmitting end transmitting the pilot signal to the receiving end includes:
所述发送端在各子频带内发送导频信号。  The transmitting end transmits a pilot signal in each sub-band.
其中， 发送端向接收端发送导频信号的步骤包括：  The step of the transmitting end transmitting the pilot signal to the receiving end includes:
所述发送端仅在部分子频带上发送导频信号。  The transmitting end transmits the pilot signal only on a portion of the sub-band.
其中：各子频带所包含的子载波是预先配置在所述发送端和 /或所述接收 端的。  Wherein: the subcarriers included in each subband are pre-configured at the transmitting end and/or the receiving end.
在另一实施例中， 一种确定信道质量指示的系统， 包括发送模块和接收 模块， 其中：  In another embodiment, a system for determining a channel quality indicator includes a transmitting module and a receiving module, wherein:
所述发送模块设置成： 向所述接收模块发送导频信号；  The sending module is configured to: send a pilot signal to the receiving module;
所述接收模块设置成： 对承载有导频信号的子频带进行信道测量后， 将 得到的所述子频带的信道质量指示反馈给所述发送模块。  The receiving module is configured to: after performing channel measurement on the sub-band carrying the pilot signal, and feeding back the obtained channel quality indicator of the sub-band to the sending module.
其中，所述发送模块设置成按照以下方式向所述接收模块发送导频信号： 在各子频带内发送导频信号。  The sending module is configured to send a pilot signal to the receiving module in the following manner: transmitting a pilot signal in each sub-band.
其中，所述发送模块设置成按照以下方式向所述接收模块发送导频信号： 仅在部分子频带上发送导频信号。  The sending module is configured to send a pilot signal to the receiving module in the following manner: transmitting a pilot signal only on a part of the sub-band.
其中：各子频带所包含的子载波是预先配置在所述发送模块和 /或所述接 收模块的。  Wherein: the subcarriers included in each subband are pre-configured in the transmitting module and/or the receiving module.
在另一实施例中， 一种接收装置， 所述接收装置设置成： 接收发送端发 送的导频信号， 对承载有导频信号的子频带进行信道测量后， 将得到的所述 子频带的信道质量指示反馈给所述发送端。  In another embodiment, a receiving device is configured to: receive a pilot signal sent by a transmitting end, perform channel measurement on a sub-band carrying a pilot signal, and obtain the obtained sub-band The channel quality indication is fed back to the transmitting end.
其中，各子频带所包含的子载波是预先配置在所述发送端和 /或所述接收 装置的。  The subcarriers included in each subband are pre-configured at the transmitting end and/or the receiving device.
在另一实施例中， 一种发送装置， 所述发送装置设置成： 在各子频带内 向接收端发送导频信号， 或者， 仅在部分子频带上向所述接收端发送导频信 号。  In another embodiment, a transmitting device is provided, the transmitting device configured to: transmit a pilot signal to a receiving end in each sub-band, or transmit a pilot signal to the receiving end only on a portion of the sub-band.
其中，各子频带所包含的子载波是预先配置在所述发送装置和 /或所述接 收端的。 Wherein the subcarriers included in each subband are pre-configured in the transmitting device and/or the Received.
下面用一个应用示例进行进一步说明本发明。 The invention is further illustrated by an application example below.
如图 2所示， 发送端向接收端发送导频信号。 在传输带宽内存在四个子 频带， 其中子频带 1对应子载波 0〜 、 子频带 2对应子载波/ i y^ 子频带 3对应子载波/ 2 ~ /3 , 子频带 4对应子载波 /3〜厶， 其中 0、 、 /2、 /3及 /4 分别代表子载波索引值。 接收端在收到导频信号后， 分别对这 4个子频带进 行信号测量， 然后将测量后得到的这 4个子频带各自对应的 CQI值反馈给发 送端。其中，这 4个子频带对应的信道质量指示（ CQI )值分别为： CQI 、 CQI2、 CQI3和 CQI4。 As shown in FIG. 2, the transmitting end transmits a pilot signal to the receiving end. There are four sub-bands in the transmission bandwidth, where sub-band 1 corresponds to sub-carrier 0 ~, sub-band 2 corresponds to sub-carrier / iy^ sub-band 3 corresponds to sub-carrier / 2 ~ / 3 , sub-band 4 corresponds to sub-carrier / 3 ~ 厶, where 0, , / 2 , / 3, and / 4 represent subcarrier index values, respectively. After receiving the pilot signal, the receiving end performs signal measurement on the four sub-bands, and then feeds back the corresponding CQI values of the four sub-bands obtained after the measurement to the transmitting end. The channel quality indicator (CQI) values corresponding to the four sub-bands are: CQI, CQI 2 , CQI 3, and CQI 4 , respectively .
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成， 所述程序可以存储于计算机可读存储介质中， 如只读 存储器、 磁盘或光盘等。 可选地， 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地， 上述实施例中的各模块 /单元可以釆用 硬件的形式实现， 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。 One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.
以上所述仅为本发明的优选实施例而已， 并非用于限定本发明的保护范 围。 根据本发明的发明内容， 还可有其他多种实施例， 在不背离本发明精神 改变和变形， 凡在本发明的精神和原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。  The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. In view of the present invention, various other modifications, equivalents, improvements, etc., should be made without departing from the spirit and scope of the invention. It is included in the scope of protection of the present invention.
工业实用性 Industrial applicability
釆用上述技术方案后， 能保证发送端获知不同子频带上的 CQI, 为后续 在不同子频带上选择合适的调制编码方式提供了基础， 以获得自适应编码调 制的增益。 因此本发明具有很强的工业实用性。  After using the above technical solution, the transmitting end can be sure to know the CQI in different sub-bands, and provide a basis for subsequent selection of appropriate modulation and coding modes on different sub-bands to obtain the gain of adaptive coding modulation. Therefore, the present invention has strong industrial applicability.

Claims

权 利 要 求 书 Claim
1、 一种确定信道质量指示的方法， 包括：  A method for determining a channel quality indicator, comprising:
发送端向接收端发送导频信号；  The transmitting end sends a pilot signal to the receiving end;
接收端对承载有导频信号的子频带进行信道测量后， 将得到的所述子频 带的信道质量指示反馈给所述发送端。  After receiving the channel measurement on the sub-band carrying the pilot signal, the receiving end feeds back the obtained channel quality indicator of the sub-band to the transmitting end.
2、如权利要求 1所述的方法， 其中，发送端向接收端发送导频信号的步 骤包括：  2. The method of claim 1, wherein the step of the transmitting end transmitting the pilot signal to the receiving end comprises:
所述发送端在各子频带内发送导频信号。  The transmitting end transmits a pilot signal in each sub-band.
3、如权利要求 1所述的方法， 其中，发送端向接收端发送导频信号的步 骤包括：  The method of claim 1, wherein the transmitting end transmitting the pilot signal to the receiving end comprises:
所述发送端仅在部分子频带上发送导频信号。  The transmitting end transmits the pilot signal only on a portion of the sub-band.
4、 如权利要求 1~3中任意一项所述的方法， 其中：  4. The method according to any one of claims 1 to 3, wherein:
各子频带所包含的子载波是预先配置在所述发送端和 /或所述接收端的。 The subcarriers included in each subband are pre-configured at the transmitting end and/or the receiving end.
5、 一种确定信道质量指示的系统， 包括发送模块和接收模块， 其中： 所述发送模块设置成： 向所述接收模块发送导频信号； A system for determining a channel quality indicator, comprising: a sending module and a receiving module, wherein: the sending module is configured to: send a pilot signal to the receiving module;
所述接收模块设置成： 对承载有导频信号的子频带进行信道测量后， 将 得到的所述子频带的信道质量指示反馈给所述发送模块。  The receiving module is configured to: after performing channel measurement on the sub-band carrying the pilot signal, and feeding back the obtained channel quality indicator of the sub-band to the sending module.
6、如权利要求 5所述的系统， 其中， 所述发送模块设置成按照以下方式 向所述接收模块发送导频信号：  6. The system of claim 5, wherein the transmitting module is configured to send a pilot signal to the receiving module in the following manner:
在各子频带内发送导频信号。  A pilot signal is transmitted in each sub-band.
7、如权利要求 5所述的系统， 其中， 所述发送模块设置成按照以下方式 向所述接收模块发送导频信号：  7. The system of claim 5, wherein the transmitting module is configured to transmit a pilot signal to the receiving module in the following manner:
仅在部分子频带上发送导频信号。  The pilot signal is transmitted only on a portion of the sub-band.
8、 如权利要求 5~7 中任意一项所述的系统， 其中： 各子频带所包含的 子载波是预先配置在所述发送模块和 /或所述接收模块的。  The system according to any one of claims 5 to 7, wherein: the subcarriers included in each subband are pre-configured in the transmitting module and/or the receiving module.
9、 一种接收装置， 所述接收装置设置成： 接收发送端发送的导频信号， 对承载有导频信号的子频带进行信道测量后， 将得到的所述子频带的信道质 量指示反馈给所述发送端。 9. A receiving device, the receiving device configured to: receive a pilot signal sent by a transmitting end, After channel measurement is performed on the sub-band carrying the pilot signal, the obtained channel quality indicator of the sub-band is fed back to the transmitting end.
10、 如权利要求 9所述的接收装置， 其中， 各子频带所包含的子载波是 预先配置在所述发送端和 /或所述接收装置的。  The receiving apparatus according to claim 9, wherein the subcarriers included in each subband are pre-configured at the transmitting end and/or the receiving apparatus.
11、 一种发送装置， 所述发送装置设置成： 在各子频带内向接收端发送 导频信号， 或者， 仅在部分子频带上向所述接收端发送导频信号。  11. A transmitting device, the transmitting device configured to: transmit a pilot signal to a receiving end in each sub-band, or transmit a pilot signal to the receiving end only on a portion of the sub-band.
12、如权利要求 11所述的发送装置， 其中， 各子频带所包含的子载波是 预先配置在所述发送装置和 /或所述接收端的。  The transmitting apparatus according to claim 11, wherein the subcarriers included in each subband are pre-configured at the transmitting device and/or the receiving end.
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