5G CSI-RS Types

5G CSI-RS has 3 Types, summarized in the below figure:

1- Non-Zero Power CS RS is used for two main purposes

  • For Channel Measurement CSI reporting, Beam Management, RLF, Beam Recovery, and Mobility.
  • For Interference Measurement, “Intra-Cell Interference” is mainly used to measure intra-Cell interference generated by Users during Multi-User MIMO

2- CSI Interference Measurement Resources

  • Mainly used for Interference Measurement, “Inter-Cell Interference” measures the interference reported or detected from Neighbor cells during SU-MIMO

3- Zero Power CSI RS

  • Define a Rate matching Pattern Serving Cell that May transmit on configured REs

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