2022年10月4日 · CQI （CQI-Channel Quality Indication， 信道 质量指示），用于反映下行 信道 质量，是下行调度的依据。 主要流程：CQI由UE测量CSI-RS得到，并由BS 控制UE进行上报，继而BS根据CQI信息选取合适的调制阶数、码率、下行数据块大小等，以保证UE在不同的无线环境 …

In HSDPA, the CQI value ranges from 0 ~ 30. 30 indicates the best channel quality and 0,1 indicates the poorest channel quality. Depending which value UE reports, network transmit data with different transport block size. If network gets high CQI value from UE, it transmit the data with larger transport block size and vice versa.

2023年3月17日 · CQI is a measure of the signal-to-noise ratio (SNR) on a wireless channel. It is a value that reflects the quality of the wireless channel at a specific point in time. The CQI value ranges from 0 to 15 in LTE systems and 0 to 31 in 5G systems.

2013年7月30日 · 在周期性CQI上报和非周期性CQI上报子帧同时存在的子帧，UE将会只上报非周期性的CQI上报而丢弃周期性的上报。 CQI上报的粒度有三个等级：宽带，UE选择的子带和上层配置的子带。

The Channel Quality Indicator (CQI) contains information sent from a UE to the eNode-B to indicate a suitable downlink transmission data rate, i.e., a Modulation and Coding Scheme (MCS) value. CQI is a 4-bit integer and is based on the observed signal-to-interference-plus-noise ratio (SINR) at the UE.

The LTE CQI stands for Channel Quality Information. It basically includes CQI, PMI,RI components. The requirement for each of these components depend on transmission mode. All transmission modes need UE to provide CQI feedback. As mentioned in the figure, LTE CQI reports can be aperiodic or periodic. Aperiodic reports are transmitted using PUSCH.

• Measurement: CQI values range from 1 to 30, with higher values indicating a better channel condition, which allows the network to use higher data rates. • Application: CQI is dynamic and is essential for adapting the downlink transmission rate and improving throughput, especially in high-speed data scenarios.

2023年12月22日 · In 5G, the CQI values can typically range between 0 and 15 (or sometimes up to 20 in some specific configurations), depending on the particular 5G NR (New Radio) configuration and the implementation.

2023年12月15日 · CQI values typically range from 1 to 15 in LTE. The higher the CQI value, the better the channel quality. The mapping of CQI values to specific channel conditions is standardized, and it helps the eNodeB to determine the appropriate modulation and coding scheme (MCS) for data transmission.

2023年8月2日 · There’re 2 types of CQI reporting: Wideband CQI & Sub-band CQI. MCS (Modulation Coding Scheme): gNB determines the MCS index based on CQI index that gNB got from UE to define the possible...