Two-Step Random Access Backoff Control for 5G Collision Management

The patent segments the MsgA message into two distinct channels: PRACH (Physical Random Access Channel) for preamble transmission and PUSCH (Physical Uplink Shared Channel) for payload transmission. This segmentation allows independent collision detection and backoff indication for each channel, enabling more reliable collision management while maintaining the fast two-step random access procedure.

The patent applies local quality by providing differentiated backoff indications based on which specific channel experienced collision. When only PRACH collides, a first backoff indication is provided; when only PUSCH collides, a second backoff indication is provided. This localized, channel-specific approach improves collision control precision without significantly increasing base station processing complexity.

The patent implements dynamic backoff timing where the backoff duration is adjusted based on the specific collision scenario. Different backoff times are assigned depending on whether PRACH, PUSCH, or both channels experience collision. This dynamic approach effectively prevents further collisions while remaining implementable through standardized protocol signaling.