- This topic has 36 replies, 1 voice, and was last updated 8 years, 3 months ago by June Nguyen.
28th March 2008 at 04:57 #51666PanGuest
I seem, that you mixed two different notions:
‘a MS geografical location’ and
‘a MS network location’
I may reffered you to subclause 6.12 Network selection in border areas 3GPP TR 22.811 (release 7), where this problem depicted.
with regards, Pan.28th March 2008 at 10:17 #51667paraHOGuest
Dear Pan and Pix
Thanks so much for the replies.
Pan I hadn’t but now I have read 6.12 for 3G and agree it says what you have said. 🙂26th June 2008 at 06:56 #51668shiniGuest
The international roamers from my neighbouring country do not camp on my network when they cross over to my country. Mine is a 2G network meanwhile my competitor is a dual 2G/WCDMA network. I did a drive test with roaming sims at the border and noticed that the roamers prone to camp on 3G network here. Why is it so?26th June 2008 at 07:56 #51669RamiGuest
It is like that, and 3G networks are prioritized over 2G networks. I faced a similar case where I colocated a 3G site with a 2G site at the airport and I noticed that I’m able to capture more roamers than all operators becuase of 3G network availability.
Regards,26th June 2008 at 16:42 #51670pixGuest
there are some parameters stored in the SIM card, and one of them might prioritize 3G over 2G.
those parameters are changeable by the initial operator, before the card is sold (basically, they implement the parameters when they “tune” the SIM card with their parameters (IMSI, PLMN, etc) )27th June 2008 at 07:31 #51671shiniGuest
could you advise further on the 3G network availability
any idea what parameter in the sim card?
where do I find more notes/info on this3rd January 2013 at 07:36 #51672June NguyenGuest
Timer for return to HPLMN
If the MS in Automatic Mode has selected and registered on a VPLMN of its home country, it shall make
periodic attempts to return to its HPLMN.
The interval between attempts shall be stored in the SIM. Only the service provider shall be able to set the
timer value. The timer shall have a value between 6 minutes and 8 hours, with a step size of 6 minutes.
One value shall be designated to indicate that no periodic attempts shall be made.
In the absence of a permitted value in the SIM, or the SIM is phase 1 and therefore does not contain the
datafield, then a default value of 30 minutes, shall be used by the MS.
This timer set at SIM memory, i am not sure it change be change from operator