Random Access Suspension via Event-Based Delay

The patent implements a periodic action principle by introducing a backoff mechanism where terminal devices delay their random access attempts after detecting collisions or receiving collision indicators. The device performs random access, detects collision through CRC checks or network feedback, then waits for a backoff period (periodic delay) before retrying. This periodic interruption and resumption of access attempts spreads out the access traffic over time, reducing simultaneous collisions while maintaining eventual access success.

The patent applies preliminary action by having terminal devices perform collision detection and backoff decision-making before actually attempting random access. The device checks for collision indicators (such as CRC failure or network collision messages) in advance, determines an appropriate backoff delay, and only then proceeds with the access attempt. This preliminary preparation reduces the likelihood of immediate collisions while maintaining efficient access timing through calculated delay periods rather than arbitrary waiting.

The patent implements partial action by implementing a maximum retry limit and configurable backoff parameters that prevent excessive access attempts. Instead of allowing unlimited continuous retries that would waste network resources, the system applies a controlled number of access attempts with increasing backoff delays. If access succeeds within the allowed attempts, resources are conserved; if it fails after maximum attempts, the device stops retrying to prevent resource exhaustion, balancing access success probability with resource conservation.