Orthogonal Resource Selection for LTE PUCCH Transmit Diversity

The patent applies local quality by making the resource allocation behavior cell-specific. For the primary cell, resources are allocated following existing rules, while for secondary cells, resources are specifically allocated to ensure they fall within the same PRB as the primary cell's resources. This localized adjustment ensures that reference symbol and data symbol resources from different cells maintain spatial coherence in the frequency domain, preventing interference while preserving the flexibility of multi-cell resource allocation.

The patent merges the resource allocation decisions for primary and secondary cells by ensuring that both allocate PUCCH resources within the same Physical Resource Block. This consolidation approach combines the resource spaces of multiple cells into a unified PRB domain, which naturally enforces alignment between reference symbol resources and data symbol resources. By merging the resource allocation into a common PRB space, the system achieves the required precision for channel selection operations while maintaining the ability to transmit multiple Ack/Nack bits.

The patent implements preliminary action by pre-establishing the PRB containment rule for secondary cell resource allocation. Before actual resource assignment occurs, the system configures secondary cells to allocate their PUCCH resources within the same PRB as the primary cell. This preliminary constraint is embedded in the resource allocation configuration, ensuring that when resources are subsequently assigned, they automatically satisfy the PRB alignment requirement. This approach maintains low complexity during runtime operations while guaranteeing the power efficiency benefits of aligned resource allocation.