Discussion
In LTE, handover failures mainly occur due to which reason ?
Answer: A
LTE handover failures mainly come from incorrect RSRP/RSRQ threshold configuration.
In LTE, the handset measures the RSRP (Reference Signal Received Power) and RSRQ (Reference Signal Received Quality) of its serving and neighbouring cells and reports when configured events occur, for example a neighbour becoming better than the serving cell by an offset. Badly set thresholds, hysteresis and time-to-trigger values make handovers happen too late (radio link failure), too early, or back and forth (ping-pong).
TDD frame synchronisation and encryption keys are handled by the network as part of the procedure. 'AP association' is Wi-Fi terminology, not LTE.
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