recording, by a UE, UE historical information, wherein the UE historical information comprises: secondary node information and/or secondary cell information, and the UE historical information further comprises at least one of: cell-level measurement result information, beam-level measurement result information, or historical information of the UE in an inactive state;

reporting the UE information by the UE;

wherein the secondary node information comprises UE time of connection,

the secondary cell information comprises UE time of connection;

wherein the cell-level measurement result information comprises one or a combination of following information:

an optimal measurement result during connection of the UE, an optimal measurement result during camping of the UE, time when the optimal measurement result appears during connection of the UE, time when the optimal measurement result appears during camping of the UE;

wherein the beam-level measurement result information comprises one or a combination of following information:

an optimal measurement result during accessing to beams for the UE, an optimal measurement result during camping on beams for the UE, time when the optimal measurement result appears during accessing to beams for the UE, time when the optimal measurement result appears during camping on beams for the UE.