Hi Fed,
Just 3 Parameters:-
1)ccch_conf
2)bs_ag_blk_res
3)bs_pa_mfrms
In 51-Frame Multiframe, total 9 CCCH blocks are available.
(1)ccch_conf : 0/1
0 means combined Multiframe (TotalCCCH blocks=9)
1 means non-combined Multiframe. (Total CCCH blocks=3)
(2)bs_ag_blk_res: No of blocks reserved for AGCH.
(3)bs_pa_mfrms :no of 51 frame multiframe between transmission of paging messages to MS of same group.
Now see the calculations how MS uses these 3 parameters for calculating its PAGING GROUP.
FORMULA:-
(IMSI mod 1000) mod{ (ccch conf – bs ag blk res) * bs_pa_mfrm }
EX:-
1)ccch_conf=0
2)bs_ag_blk_res=1
3)bs_pa_mfrms=2
LETS SAY IMSI / TMSI:- XXXXXXXXXXXXXXX
i.e. (XXXXXXXXXXXXXXX mod 1000) mod{ (9- 1) * 2}