Filter Function or any Logic

Dear Experts,

                     I have a data like below , Column "H" has rnti's , Column "F" has sfn which can range from 0~1023( and once 1023 it shall start again from 0) slots that can range from 0~9, each sfn(say 252) has slots(0~9), 

Column "J" is Sn( Sequence number) , 

In Output , I want like this, example for the rnti 384, column "B" = count of spdu-1 for the rnti=384, and so on

How the spdu-1 counted? (spdu-x's are counted per rnti & per-rlcCtrlAckSn_ ,) as below for example for rnti==384,

Thanks in Advance,

I posted this earlier also , not sure why post got deleted somehow