For example, if the mcs-table in the PDSCH-config is 64qamLowSE when sending RRC reassignment messages, should table 3 be selected for cqi-table? or can mcs table 3 correspond to cqi table2?
Yes they do. Plus every UE chipset has its own internal mapping of SNR → MSC ->CQI
The Modulation and Coding Scheme (MCS) is a scheme that determines the modulation and channel coding parameters to be used for transmitting data over the down-link channel. The Channel Quality Indicator (CQI) is a measure of the quality of the received signal and is used by the receiver to provide feedback to the transmitter about the appropriate MCS to use for data transmission.
In general, the MCS table and the CQI table are related, but they do not necessarily correspond exactly to each other. The MCS table defines the possible combinations of modulation and coding schemes that can be used for data transmission, while the CQI table defines the mapping between the measured CQI value and the appropriate MCS to use for transmission.
The mapping between the CQI value and the appropriate MCS to use can be dynamic and may depend on various factors such as the channel conditions, the level of interference, and the quality of service requirements. Therefore, the MCS table and CQI table may be designed to provide some flexibility and adaptability in selecting the appropriate MCS for data transmission.
We can Conclude that , while the MCS table and CQI table are related, they do not necessarily correspond exactly to each other, as the mapping between the CQI value and the appropriate MCS to use can be dynamic and may depend on various factors.