D2D Control Information Transmission Configuration

The patent applies preliminary action by pre-configuring resource pools for D2D control information transmission before UEs go out of network coverage. The network configures and stores resource pool parameters (time-frequency resources, periodicity, etc.) in advance, so that when UEs lose network connection, they can immediately use these pre-configured resources to transmit control information without needing real-time network coordination, thus maintaining communication reliability while avoiding continuous system complexity

The patent implements self-service by enabling UEs to autonomously select and use pre-configured resources from local storage when outside network coverage. The UE independently determines which resource pool to use based on stored configuration parameters without requiring real-time network signaling or coordination, allowing the system to maintain simplicity while ensuring reliable D2D communication in coverage-loss scenarios

The patent applies dynamics by creating a two-mode resource allocation system that adapts to network conditions. When in network coverage, UEs use dynamic network-scheduled resources for flexible allocation. When out of coverage, UEs switch to pre-configured resource pools with predetermined parameters. This dynamic switching mechanism maintains transmission efficiency through appropriate resource selection while preserving flexibility through conditional adaptation to different operational scenarios

The patent implements parameter changes by configuring multiple resource pool parameter sets (different time-frequency allocations, periodicities, resource block configurations) that UEs can select based on service requirements and conditions. The network can configure different parameter sets for different D2D service types (unicast, groupcast, broadcast), allowing efficient transmission for each service type while maintaining overall system flexibility through parameter diversity