Below is the table explaining the LTE measurements events.

These events are essential for determining when to initiate handover procedures in LTE networks, ensuring smooth and seamless transitions between cells or different radio access technologies. The specific utilization of these events may vary based on the network configuration and requirements.

Event A1: This event occurs when the signal strength or quality of the serving cell becomes better than a predefined threshold. It is used in intra-frequency handovers and indicates that the serving cell’s conditions have improved, potentially eliminating the need for a handover. In inter-frequency handovers, this event is used to stop measuring neighbouring cells.

Event A2: When the signal strength or quality of the serving cell falls below a predefined threshold, event A2 is triggered. It is used in inter-technology handovers and suggests that the serving cell’s conditions have deteriorated, indicating a potential need for a handover. In inter-frequency handovers, this event is used to start measuring neighbouring cells.

Event A3: This event occurs when a neighbouring cell’s signal becomes offset better than the serving cell. It is used in both intra-frequency and inter-frequency handovers. When event A3 is triggered, it signifies that the neighbouring cell’s conditions have significantly improved, making it a potential target for handover.

Event A4: In inter-frequency handovers, event A4 is triggered when a neighbouring cell’s signal strength or quality becomes better than a predefined threshold. This event suggests that the neighbouring cell’s conditions are superior, indicating a potential need for a handover.

Event A5: When the serving cell’s signal becomes worse than threshold1, and a neighbouring cell’s signal becomes better than threshold2, event A5 is triggered in inter-frequency handovers. This event indicates that the serving cell’s conditions have degraded while a neighbouring cell offers better signal conditions, suggesting a potential handover.

Event A6: Introduced in Release 10 for Carrier Aggregation (CA), event A6 is triggered when a neighbors cell becomes offset better than the serving cell. This event is specific to intra-frequency handovers with carrier aggregation, where multiple component carriers are used.

Event B1: This event is used in inter-technology handovers (inter-RAT). It occurs when an inter-RAT neighbour cell’s signal becomes better than a predefined threshold. It suggests that the inter-RAT neighbour cell’s conditions are favourable for a potential handover.

Event B2: In inter-technology handovers, event B2 is triggered when the serving cell’s signal becomes worse than threshold1, and an inter-RAT neighbors cell’s signal becomes better than threshold2. This event indicates that the serving cell’s conditions have deteriorated, while the inter-RAT neighbors cell provides better signal conditions, indicating a potential handover.