How can I understand the meaning of parameter within these EVENTs?

How can I understand the meaning of parameter within these EVENTs?(in Ericsson Cell Trace file which collected by OSS)

event: INTERNAL_PER_UE_TRAFFIC_REP
per_ue_thp_time_dl
per_ue_thp_time_ul
per_ue_thp_dl_drb
per_ue_thp_ul_drb
per_sched_activity_ue_ul
per_sched_activity_ue_dl
per_ue_dl_mac_delay
ue_harq_dl_ack_qpsk
ue_harq_dl_ack_16qam
ue_harq_dl_ack_64qam
radiothp_vol_dl
radiothp_res_dl
radiothp_vol_ul
adiothp_res_ul

event: INTERNAL_PER_UE_RB_TRAFFIC_REP
per_drb_pdcp_ackvol_dl
erab_id
per_drb_dl_rlc_delay
per_drb_dl_rlc_delay_sampl
per_drb_thp_time_dl
per_rb_qci

event: INTERNAL_PROC_UE_CTXT_RELEASE
erab_release_req_qci
erab_setup_req_arp

Thanks for your guidance.