Access Control Mechanism for 5G IoT Handover Latency

The patent implements a unified access control mechanism that serves multiple purposes: it provides application-specific access barring, handles network congestion control, and manages UE access permissions through a single consistent procedure. The access control function is designed to be universal, handling different access types (MO signaling, MO data, emergency) through the same mechanism rather than separate mechanisms for each application.

The patent enables dynamic adjustment of DRX cycle lengths based on Data Radio Bearer characteristics and traffic patterns. The system can switch between different DRX cycle configurations (short DRX cycle, long DRX cycle) and adjust the drx-InactivityTimer dynamically. This allows the DRX mechanism to adapt to changing traffic conditions, improving data communication efficiency by using shorter cycles during active traffic and longer cycles during idle periods.

The patent implements data interruption time reduction mechanisms during handover procedures by performing preliminary actions. The system configures data interruption time reduction parameters before handover occurs, pre-establishes data forwarding tunnels, and prepares the target base station in advance. This allows the handover to proceed with minimal data interruption, as the necessary data forwarding and context transfer are already prepared.

The patent implements light connection mode operations by changing key parameters: the UE transitions to a simplified connection state with reduced monitoring requirements. The system adjusts paging cycle lengths, modifies DRX configurations, and changes the UE's activity pattern to conserve battery power. While this reduces power consumption, the patent manages signaling overhead through efficient paging message construction and optimized network-initiated operations.