 This topic has 13 replies, 1 voice, and was last updated 8 years, 8 months ago by Deepak.

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somnath duttaGuest
With some IMSI value,CCCH_CONFIG=0,BS_AG_BLK_RES=1,BS_PA_MFRMS=4,how to calculate the actual paging group?I want the actual value of the paging group.Plz help.
GarryGuest32 paging groups with non combined and 8 with combined.
somnath duttaGuestNo I want the actual paging group which is assigned for me.That means how to calculate the actual paging group based on my IMSI/TMSI which is assigned to me.
pixGuestthere’s a formula, that you can find in a 3GPP document.
http://www.3gpp.orgsomnathGuestActually I have tried to calculate the same using that formula…but there Im facing some prob where mod value is returning a ‘0’…which is meaningless…so I feel Im doing some mistake somewhere.So can you help?
pixGuestyes, but you’ll have to give me the formula, so i can give it a try. No time to look for the formula by myself, sorry…
somnathGuestpagging_group(0….N1)= (IMSI mod 1000)mod N
N=(no of CCCH group in a multiframeno of blk for AGCH)*no of multiframe between pagging
for instance no of CCCH blk available=9,AGCH blobked=1,
no of pagging between multiframe=4plz help
pixGuestIMSI mod 1000 –> gives you the 3 last digits of the IMSI
3 last digits mod 48 –> in excel, type the formula
“=MOD(3digits;48)”why 48 : because (91)x4 = 48
the result is the value of the paging group…
regards,
pixsomnathGuestIt will be 32 instead of 48 because
(91)*4=32pixGuestwhat a shame… thx somnath, i’m doing really stupid mistakes sometimes ! :))
i was even wondering how come a “modulo 48” was used, while there is about 20 to 30 paging groups normally… never crossed my mind that 8×4 = 32.
anhGuestLet say, we have 100 IMSIs belonging to paging group No.2
With paging request type 3 (4 MS per paging msg), how will these 100 IMSIs be paged?Thanks,
pixGuesthi,
these Ms will be paged by their TMSI, if the MSC has allocated a TMSI to these MS, and if the “TMSI paging” method is defined in the MSC.If anyone has more info, welcome to share…
regards
pixMickGuestIn case of Paging Request Type the mobile stations are identified by their TMSIs (TS 04.08)
DeepakGuestCCCHCONF Value tells,Whether you are using COMBINED or NONCOMBINED Configuration.
I dont remember exactly, What exactly CCCH_CONFIG=0 stands for.First lets Consider COMBINED config
COMBINED : Total CCCH = 9
BS_AG_BLK_RES=1
So Channels reserved for Pagig = 91 = 8BS_PA_MFRMS=4 : This tells After how many multiframes paging group repeats.
So total Paging groups = 8*4 = 32
Lets IMSI Value = x
Paging Group for a particular Mobile =
(x MOD 1000) MOD 32 where 32 is total Paging Groups.
e.g. if IMSI = 404685505601234
Paging Group = (404685505601234 MOD 1000)MOD32
i.e. => 234 MOD 32 => 10Paging Group = 10.
NONCOMBINED:
Total CCCH = 3
BS_AG_BLK_RES=1
So Channels reserved for Pagig = 31 = 2BS_PA_MFRMS=4
So total Paging groups = 2*4 = 8Paging Group = (IMSI MOD 1000)MOD 8
e.g
404685505601234 MOD 1000 MOD 8
=> 234 MOD 8 = 2
Paging Group = 2I hope this answers your query

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