Uplink Scheduling and HARQ Timing in TDD-FDD Carrier Aggregation

The patent implements dynamic uplink scheduling by allowing the network to flexibly configure and switch between cross-carrier scheduling and self-scheduling modes based on real-time channel conditions and traffic requirements. The scheduling configuration can be dynamically adjusted through RRC signaling, enabling the system to adapt to changing conditions and optimize uplink resource utilization while maintaining high data transmission rates in TDD-FDD carrier aggregation scenarios.

The patent introduces an intermediary configuration mechanism where the network provides explicit scheduling configuration information through RRC signaling. This configuration acts as an intermediary layer that simplifies the operation by pre-defining scheduling parameters and rules, reducing the real-time decision-making complexity at both the network and user equipment sides while still enabling high-data rate transmission through carrier aggregation.

The patent applies local quality by allowing different HARQ timing configurations for different serving cells within the same carrier aggregation system. Each serving cell can have its own specific timing parameters (k values for uplink grants and PHICH reception) tailored to its TDD or FDD characteristics. This enables the system to maintain optimal HARQ timing for each individual cell while coordinating them through a unified carrier aggregation framework, thus enhancing data rate without excessive coordination complexity.