|
|
 |
|
-
An Add-In for Microsoft Excel that lets you use Erlang B and C functions in your
own Excel spreadsheets.
The ultimate in Erlang traffic modelling flexibility and data sharing.
|
|
-
An easy to use and fast Windows product offering Erlang B, Extended Erlang B,
Erlang C and Call Minutes calculators.
Four products in one, plus Erlang for Excel free.
|
|
-
Simplifies the complicated design process involved in creating effective voice
networks.
Support both traditional circuit switching techniques and Voice over IP.
|
|
|
 |  | mlc - 11th July 2012 (15:13 GMT) | | |
|
Hi Guys:
Did you face before to this problem:
We are implementing a Full MVNO. The problem is that when the user put his phone to avoid data roaming he took the network of our MNO as roaming and the user cant connect to internet.
The question is if we need to configure the MSC/SGSN to send a equivalent list during the LU or we need to put that list in the SIM cards User Controlled PLMN Selector with Access Technology field??
Plase send your comments..
Good Morning |
| | pix - 15th March 2012 (13:03 GMT) | | |
|
yes, my post was deleted ...????
what's going on ? |
| | Rex - 15th March 2012 (12:40 GMT) | | |
|
Hi admins,
day before yeaterday I saw an answer related to my previous post, now it's not here. Is it deleted for any purpose?
Best regards,
Rex |
| | Rex - 13th March 2012 (19:11 GMT) | | |
|
Hi Pix,
Thanks!
I haven't any document regarding NCC_Permitted to read more about that. In OMCR there are eight values of ncc_permitted: 0 to 7. In our case there is 0. When we look in logical parameters in NPO it shows ncc_permitted=not permitted. I don't know is it the right value. Network color code is 0. If we choose, let's say, the value 7 (most significant bits), is that mean that we permit ncc=0 or we permit another plmn which has ncc=7. It's a bit ambiguous to me.
Best regards,
Rex |
| | pix - 13th March 2012 (18:55 GMT) | | |
|
rex,
thata's a good idea to create an external cell, use the same BCCH BSIC than the foreign cell, and apply strong penalty to avoid reselection to those cells. Really interesting idea.
The NCC PERMITTED should allow the NCC=0 to be reselected. Normally, every cell in your network should have NCC=0 allowed.
I think that MNC mobile network code is part of the PLMN id (= NCC + MNC) ? But I'm not sure about this, it has been a long time since I looked at such parameters :)
Regarding the PRC : first, i think you need to define another PLMN in the OMCR. Then you should be able to create an external cell that belong to another PLMN. Creating other PLMN might be an optional feature in the OMCR, I will check it out tomorrow at the office.
Let me know how the NCC PERMITTED setting will affect your situation. Tomorrow I will tell you what it is exactly doing.
(I now have so many things to do tomorrow !)
regards
pix |
| | Rex - 13th March 2012 (13:24 GMT) | | |
|
Thanks Pix, paraHO
Pix, I think that's not the phone issue because we tested many SIM cards in the same phone and the problems appeared only to those SIMs which previously roamed with very good conditions in home PLMN. I tried to check PLMN settings in SIM card with SIM reader (chinese SIMMAX) but there is nothing in application for managing PLMNs. Maybe I should try with Dekart Simreader.
I've read somewere here in forum about creating external cell. What do you think to create the foreign cell as external. In PRC there is not possible to change the parameter "PLMN name", it's always "own PLMN". Any suggestion regarding external cell?
And another question regarding NCC_permitted. In our network NCC is 0 and NCC_permitted is not_permitted (value 0). Is that OK. Should we tune that?
And the last one, home MNC is 01 and foreigner operator's MNC is the same 01. What's the role of MNC in these situations?
Best regards,
Rex |
| | paraHO - 11th March 2012 (03:44 GMT) | | |
|
Rex if
(a) it is SIM Card issue
(b) the roaming neighbour not required
(c) is it possible for you to add roaming neighbour to FPLMN (forbidden list)
cheers
paraHO |
| | pix - 10th March 2012 (12:19 GMT) | | |
|
rex,
the tests you have done seem to indicate that it is indeed a SIM issue. The next step : read this SIM card through a SIM reader (I recall TEMS Investigation provide such functionality, doesn't it ?)
you can read the PLMN settings of the SIM, I guess...
Both sets of SIM were inserted in the same mobile phone ? The question is whether the mobile phone could be the problem here.
Cheers
pix |
| | Rex - 9th March 2012 (18:47 GMT) | | |
|
Hi Pix,
thanks for your answer and contribution, as always.
NCC_Permitted is disabled in all cells. After some tests made, we noticed that this phenomenon happens not with every SIM card. In few of them even if signal level was -60 or -65 dBm they roamed to the other operator (with sig level lower than -80 dBm). With the other SIM cards everything was OK, staying in homePLMN. Do you think is SIM issue?
Best regards,
Rex |
| | pix - 1st March 2012 (09:34 GMT) | | |
|
rex,
yes, it is very strange.
Do you have the (tems?) log of this behaviour ?
if yes, then you should check some parameters of this distance cell:
-MNC
-NCC
-BCCH
Regarding MNC/MCC : are they correctly set ? or are they identical to your own PLMN's values ?
Regarding BCCH : is this frequency the same as one of your neighbours?
You could tune the parameter NCC_permitted, in order to have only your own NCC allowed for that particular cell.
Another (far-fetched) theory : the distant PLMN is considered as a "home plmn" in your SIM card. If that's the case, then you have a big problem, as this is a hardcoded setting (in the SIM) that cannot be modified remotely.
regards
pix |
|
|
|
 |
Post a reply to this article
|
|
|
|
| Important notice This
forum is rapidly turning into a document exchange medium. It was intended as an area
for open discussion. Please restrict your postings to open discussions.
Requests for documents are now being removed from this forum.
|
