ACK/NACK Transmission via TPC Field in Carrier Aggregation

The patent implements dynamic PUCCH resource selection where the UE can adaptively choose from multiple configured PUCCH resources based on current channel conditions and traffic requirements. The network can dynamically indicate which PUCCH resource to use through downlink control information, allowing the system to optimize reliability while managing complexity through flexible, condition-based resource allocation rather than static configurations

The patent divides the PUCCH resource space into multiple separate, configurable resources that can be independently allocated and managed. Each PUCCH resource can be assigned to specific carriers or transmission scenarios, allowing the system to segment the control information transmission task across multiple dedicated resources, thereby improving reliability through redundancy while maintaining manageable complexity through organized resource partitioning

The patent makes the TPC field multi-functional by enabling it to serve both its traditional transmit power control purpose and a new PUCCH resource indication purpose. Through configuration options, the same TPC field can be interpreted as either power control commands or resource selection indicators depending on system setup, allowing one field to fulfill multiple functions without requiring additional signaling overhead

The patent changes the interpretation parameter of the TPC field based on configuration. When PUCCH resource indication is enabled, the TPC field's bit patterns are reinterpreted to map to specific PUCCH resource indices rather than power adjustment levels. This parameter change allows the field to switch between representing power control values and resource selection values, eliminating information loss by changing how the same physical field is decoded