Large-Port CSI-RS Mapping With Implicit Resource-Element Configuration

The patent segments the CSI-RS resource configuration into two parts: (1) a base configuration that defines common parameters applicable to multiple ports, and (2) port-specific configurations that define only the additional resource-element locations for ports beyond the threshold. This segmentation allows the network to signal a compact configuration that scales with the number of ports without linearly increasing overhead, as the same base configuration can be reused across multiple port groups.

The patent introduces a new dimension to CSI-RS configuration by defining resource-element locations relative to a reference point (e.g., first resource block or first OFDM symbol) rather than specifying absolute locations for all ports. This relative positioning approach adds a reference-based dimension to the configuration, enabling compact signaling where only offsets and relative positions need to be transmitted, not complete location sets for each port.

The patent implements dynamic configuration flexibility by allowing the network to selectively apply different base configurations to different port groups and to dynamically adjust the number of ports per group based on channel conditions and system requirements. The configuration can be adapted in real-time without requiring complete re-signaling, as changes can be made to individual port group configurations independently.

The patent applies local quality by allowing different configuration parameters to be applied to different port groups within the same CSI-RS resource. Each port group can have customized resource-element locations, density, and mapping patterns while sharing common parameters, enabling fine-grained control over specific port configurations without affecting the entire multi-port system.

The patent uses copying by defining a base configuration that can be reused and replicated across multiple port groups. Instead of signaling unique configurations for each port, the same base configuration template is copied and applied to multiple ports, with only minimal modifications needed for port-specific adjustments. This copying approach maintains configuration completeness while dramatically reducing the amount of signaling required.

The patent performs preliminary action by pre-defining a base configuration that establishes the foundation for multiple port groups before actual transmission. The base configuration includes all common parameters that will be reused, and only the necessary port-specific deviations need to be signaled subsequently. This preliminary setup eliminates the need to re-signal redundant information for each port group.