NR Sidelink CSI-RS Resource Mapping for Accurate Channel Measurement

The patent segments the resource allocation by introducing different density levels (e.g., 1/4, 1/2, 3/4 density) for CSI-RS transmissions. This allows the system to divide the frequency resources into different portions, allocating more subcarriers when high measurement accuracy is needed while preserving some resources for other purposes, thus resolving the contradiction between measurement precision and resource utilization efficiency

The patent implements dynamic resource allocation where the number of subcarriers and symbol durations for CSI-RS transmissions is not fixed but can be adjusted based on channel conditions, traffic requirements, and measurement needs. This dynamic approach allows the system to optimize the balance between measurement accuracy and resource efficiency in different operational scenarios

The patent applies local quality by allowing different subcarrier densities in different frequency regions or different time periods. Instead of uniformly increasing subcarriers across all resources, the system can concentrate CSI-RS transmissions in specific local regions where measurement is most critical, thereby improving measurement accuracy in those areas while limiting interference in other regions

The patent implements periodic CSI-RS transmissions with configurable periods and patterns. By transmitting CSI-RS periodically rather than continuously on all subcarriers, the system achieves adequate measurement accuracy over time while significantly reducing the overall interference generated compared to continuous full-bandwidth transmissions