Yap it was just d confusion..!!
N I already read 29.018 Jan-2012 Release..!!
Also analysed trace on Gs & Gb..
I like that only one sentence from spec..
“The SGSN shall not retransmit the PAGING CS message”
That’s all..There is a T5 timer in MSC,after expiry of same MSC should stop asking SGSN about..!! 🙂
Some how I have convinced CS core guys with those arguments..!!