Uplink Grant Release After Handover Complete Transmission

The patent applies the discarding and recovering principle by enabling the terminal device to release the uplink grant resource after successfully transmitting the handover complete message. The network device then recovers this resource for subsequent data transmission, transforming a wasted resource into a reusable one. This is implemented through the release condition judgment module that detects when the handover complete message has been successfully reported and triggers resource release.

The patent implements dynamics by making the uplink grant resource state changeable from held to released based on transmission completion. The resource is dynamically managed through conditions such as timer expiration, reception of downlink data, or network device instructions, allowing the system to adapt resource allocation to actual transmission needs rather than maintaining static allocation.

The patent applies partial action by providing just enough resource holding time to ensure reliable handover complete message transmission through mechanisms like timers and retransmission windows, then releasing the resource. This avoids excessive resource holding while maintaining sufficient reliability for the critical handover reporting function.

The system uses feedback mechanisms including timers that track resource holding duration, downlink data reception status, and network device instructions to determine when to release the uplink grant resource. This feedback loop ensures resources are held long enough for reliable transmission but released promptly when no longer needed, optimizing utilization efficiency.