PUCCH Resource Selection for Multicast HARQ Feedback Reliability

The patent applies universality by enabling the PUCCH resource, originally designed for unicast HARQ feedback, to serve both unicast and multicast HARQ feedback functions. The network device configures PUCCH resources that can be dynamically selected based on whether the data transmission is unicast or multicast, allowing the same physical uplink control channel infrastructure to handle both transmission types with HARQ feedback support.

The patent employs parameter changes by modifying the PUCCH resource selection based on the data type (unicast vs. multicast). The terminal device determines the target PUCCH resource differently depending on whether it receives unicast or multicast data, using parameters such as the data type indicator and configured resource sets to select the appropriate feedback channel, thereby enabling HARQ feedback for multicast without requiring a completely separate feedback mechanism.

The patent applies segmentation by dividing PUCCH resources into different sets or groups based on their intended use (unicast vs. multicast). The network device configures multiple PUCCH resource sets, and the terminal device selects from the appropriate set based on the data type. This segmentation simplifies resource management by organizing PUCCH resources into logical groups rather than requiring a single large pool of resources to be manually managed.

The patent implements self-service by enabling the terminal device to autonomously determine the appropriate target PUCCH resource based on pre-configured parameters and the current data reception context. The terminal uses the configured PUCCH resource sets, data type indicators, and selection rules to automatically select the correct feedback resource without requiring explicit dynamic signaling from the network device for each feedback transmission, thereby simplifying network control while maintaining ease of operation.