Random Access PDCCH Monitoring with RTT Timer Gaps

The patent implements periodic PDCCH monitoring by defining specific monitoring occasions based on formula (1), where monitoring occurs at periodic intervals determined by parameters such as msg1-ProcessingTime, subcarrier spacing, and cyclic prefix length. This periodic approach replaces continuous monitoring, reducing power consumption while ensuring control messages are captured at appropriate intervals during random access procedures.

The patent calculates and determines PDCCH monitoring occasions in advance using formula (1) before actual random access procedures occur. By pre-computing when monitoring should occur based on configured parameters and expected timing relationships, the UE can efficiently activate monitoring only when necessary, avoiding continuous monitoring and reducing power consumption while maintaining reliability.

The patent establishes periodic monitoring occasions using formula (1) that aligns with the actual timing of control message transmissions during random access procedures. By monitoring only at these calculated periodic intervals rather than continuously, the system maintains reliable control message delivery while improving overall random access efficiency through reduced unnecessary monitoring activities.

The patent dynamically adjusts PDCCH monitoring behavior based on the random access procedure state. Monitoring occasions are calculated to be active only during specific random access phases (such as during msg1-ProcessingTime and subsequent timing windows), and inactive during other periods. This dynamic approach optimizes system efficiency by adapting monitoring intensity to actual procedural needs rather than maintaining constant monitoring.

The patent applies periodic monitoring specifically optimized for RedCap UEs by calculating monitoring occasions using formula (1) with parameters appropriate for reduced capability devices. The periodic structure ensures that RedCap UEs monitor only at necessary intervals during connection establishment, maintaining reliability while significantly reducing power expenditure compared to continuous monitoring, which is particularly beneficial for energy-constrained RedCap devices.

The patent implements differentiated monitoring strategies for different UE types by applying the periodic monitoring formula (1) with parameters tailored to RedCap capabilities. The monitoring behavior is locally optimized for RedCap UEs' specific requirements and constraints, allowing reliable connection establishment while adapting power consumption to the reduced capability profile of these devices rather than applying uniform continuous monitoring to all UEs.