Wireless Communication PSFCH Allocation for Low-Latency Sidelink HARQ

The patent applies universality by configuring additional PSFCH resources that can be shared across multiple service types and terminal devices. Instead of creating separate pool-specific configurations for each service, the additional resources serve as a universal resource pool that any terminal can utilize, thereby reducing the need for multiple specialized configurations and lowering signaling overhead.

The patent segments PSFCH resources into two distinct categories: pool-specific resources for general use and additional resources for specific services or terminals. This segmentation allows the system to maintain the benefits of pool-specific configuration while adding flexibility through dedicated resources, reducing the complexity of managing entirely separate resource pools for each service type.

The patent applies preliminary action by pre-configuring additional PSFCH resources in advance, specifically positioned to minimize latency for time-critical services. These resources are prepared beforehand with known time-frequency locations, allowing terminals to immediately transmit HARQ feedback without waiting for the next periodic pool-specific resource opportunity, thus reducing feedback latency while maintaining structured resource allocation.

The patent introduces dynamics by allowing the system to adaptively select between pool-specific periodic resources and additional resources based on service requirements. For low-latency services, the system dynamically utilizes the additional resources that offer more flexible timing, while maintaining the stable periodic structure of pool-specific resources for other services, thus achieving both structure and low latency where needed.