Dynamic ZP CSI-RS Scheduling for Flexible Interference Measurement

The patent introduces dynamic ZP CSI-RS resource configuration where the number of antenna ports, timing, and frequency location can be flexibly adjusted based on network conditions and service requirements. The configuration is no longer fixed to 4-port CSI-RS but can be dynamically changed to 1, 2, 4, 8, or more ports, enabling adaptive scheduling that improves resource utilization while maintaining manageable complexity through standardized configuration procedures.

The patent changes key parameters of ZP CSI-RS configuration including the number of antenna ports (from fixed 4-port to variable 1/2/4/8/N ports), transmission timing (periodic/semi-persistent/aperiodic), and frequency location. These parameter changes enable the system to adapt to different scenarios such as beamforming, massive MIMO, and varying interference conditions, significantly improving scheduling flexibility without overwhelming complexity through systematic parameter management.

The patent makes ZP CSI-RS configuration dynamic by allowing the number of antenna ports to be adjusted according to actual needs. The network can configure 1-port, 2-port, 4-port, 8-port, or N-port ZP CSI-RS resources, enabling precise matching between resource configuration and channel conditions. This dynamic adjustment improves CSI estimation accuracy by using appropriate port numbers for different scattering conditions while maintaining allocation flexibility.

The patent segments the ZP CSI-RS resource configuration into multiple independent parameters that can be separately optimized: number of antenna ports, timing configuration, frequency location, and resource element patterns. This segmentation allows each parameter to be independently adjusted to improve CSI estimation accuracy for specific scenarios without affecting overall system flexibility, enabling precise control over measurement resources.

The patent extends the transmission mode from purely periodic to include semi-persistent and aperiodic ZP CSI-RS transmissions. Periodic transmission maintains simplicity for regular measurements, while semi-persistent transmission activates/deactivates resources based on medium-term conditions, and aperiodic transmission provides on-demand resources for immediate measurements. This multi-mode approach improves resource utilization efficiency by matching transmission patterns to actual network conditions without excessive complexity through standardized control mechanisms.

The patent introduces configurable transmission timing parameters including periodicity, offset, and activation/deactivation conditions for semi-persistent and aperiodic transmissions. These parameter changes enable the system to adapt resource allocation to varying traffic patterns, interference conditions, and service requirements, significantly improving resource utilization efficiency while maintaining manageable complexity through parameter-based control rather than structural complexity.

The patent segments interference measurement into multiple independent ZP CSI-RS resources that can be separately configured and measured. Each ZP CSI-RS resource can be independently aligned or misaligned with neighboring cell NZP CSI-RS resources depending on the specific interference scenario. This segmentation allows the system to maintain interference measurement accuracy for critical resources while gaining scheduling flexibility for other resources, enabling differentiated treatment of different interference conditions.

The patent applies local quality by allowing different ZP CSI-RS resources to have different alignment relationships with neighboring cell resources based on local interference conditions. Some resources can be aligned to measure specific inter-cell interference, while others can be misaligned to measure different interference patterns or to provide scheduling flexibility. This localized optimization maintains measurement precision where needed while improving overall scheduling flexibility.