PUCCH SRI Resource Mapping for High-Density UE Multiplexing

The patent segments the SRI transmission resources by introducing multiple orthogonal covering sequences and cyclic shifts. Each UE is assigned a unique combination of orthogonal cover index and cyclic shift value, which divides the shared frequency-time resources into orthogonal sub-channels. This segmentation allows multiple UEs to transmit simultaneously without interference, resolving the contradiction between multiplexing capacity and interference.

The patent extends the resource dimensioning by adding orthogonal cover index and cyclic shift value as new dimensions beyond traditional frequency and time resources. This creates a multi-dimensional resource space where UEs are separated not only in frequency-time but also in the orthogonal code domain, enabling higher multiplexing capacity while maintaining orthogonality and minimizing interference.

The patent enables UEs to self-determine their physical resources by using their UE ID to select specific orthogonal cover indices and cyclic shift values from predefined sets. This self-service mechanism eliminates the need for complex dynamic signaling from the network side, as each UE autonomously selects its resources based on pre-configured parameters and its own identity, simplifying the overall system while maintaining efficient one-to-one mapping.

The patent transforms the resource allocation problem by changing the parameters from dynamic time-frequency assignments to static orthogonal code assignments. By using predetermined orthogonal covering sequences and cyclic shifts that are selected based on UE ID, the system achieves efficient resource allocation through parameter selection rather than complex dynamic mapping, reducing both signaling overhead and device complexity.