When doing PCI planning, what principles need to be met? (multiple choice)

If the cell radius is 90 kilometers, which of the following should be used for the PRACH preamble format?

The drive test scenario judges the success of the handover, usually based on the signaling. On the terminal side, which of the following signaling starts the handover process?

TD-LTE UE is set to trigger intra-frequency handover by A3 event. In order to reduce the trigger of A3 event, which of the following parameters can be increased? (multiple choice)

The single-site verification test only needs to verify whether the cell status is normal in the idle mode.