Can't reselection form 2g to 3g with almost Mobile on NSN

[HNONA]

Currently on our network almost Mobile can't reslection form 2g (Nokia) to 3g (Nokia). We tested in the same RF and place condition but some MS (Nokia N9, Tems C702) can be normally reselection from 2g to 3g while other MS can't reselect. I tried many time with many cases still not successfully. About parameter configed:
+ Qsearch I: 7
+ Qsearch P: 7
+ FDDQmin: -14db
+ FDDQoffset: -32db
Neighbor and EcNo, RSCP of 3g cell is so good.

Hopping everyone support me about this case, thanks

[sedicla]

What kind of test did you performed.
Did you forced the UE to reselect whit a script?

Best Regards.

[bino]

Currently on our network almost Mobile can't reslection form 2g (Nokia) to 3g (Nokia). We tested in the same RF and place condition but some MS (Nokia N9, Tems C702) can be normally reselection from 2g to 3g while other MS can't reselect. I tried many time with many cases still not successfully. About parameter configed:
+ Qsearch I: 7
+ Qsearch P: 7
+ FDDQmin: -14db
+ FDDQoffset: -32db
Neighbor and EcNo, RSCP of 3g cell is so good.

Hopping everyone support me about this case, thanks


Hi HNONA,

You should change FDDQmin to -12dB and FDDoffset = 0
Can you upload the tems logfile?

Br,

[HNONA]

I changed FDOFFset and FDDQmin parameter but not successful. This problem that some MS(C702, Nokia N9) can reselection, and other Mobile(Nokia E71,72, HTC,....) can't.
I attach log file with TEMS C702, it's ok.
Pls,

[gprastomo]

Hi,

FDDQO should be -32 db, cos path loss difference between 2g and 3G is ~-25 dB, dont change to 0, it will never reselect.

Check the Q search Idle/QSEARCHI/QSI, it should set to always search the 3G.

First of all, the 2G to 3G neighbour should be defined with correct definition

[HNONA]

Hi all, Why have UE(TEMS, N9) reselection and other UE can't reslection at same place? Do you have new idea?

[HNONA]

Pls, support me.

[hieubt]

Can you give the log file uploaded with an external link? I think this case is very interesting!

[ninjafine]

Well, it could have few reasons. Different Ue can have different Ec/No and RSCP due Ue's HW. Other thing is when you have FDDRSCPMIN in System Information. Some Ue doesn't support FDDRSCPMIN and ignore it so this Ue will reselect in 3G in some conditions while other are waiting for good RSCP. You should better compare System Information Type 2quater from different Ue. Please take a look in attachment. Please add reputation if you like my answer.26501

[HNONA]

In Nokia system don't have FDDRSCPMin so license, currently using only FDDQmin for cell reselection. I tested reselection 2g-3g on site, so RF condition is best.
26523

[plannerguy]

Hi

check FDDqoffset and FDDqmin offset , fddqmin apply threshold on ec/no and FDDqoffset on RSCP(if FDDRSCPmin availblel).

fddqmin offset (FDMO) should be set as 0.

Regards
Plannerguy

[HNONA]

not successful, do you think have parameter on bsc distinguish MS release?

[hicham]

Hello Hnona,

Don't change FDDQoffset to 0, it will never reselect the 3G system. If you put -32dBm it will also never reselect, because in 3GPP it says that it is only used for SOS cells.
you can use the setting below:
QSRI/QSRP=7
FDD=-12
FDM=-28
ISHO_Support in BSC level=enable

check also if your 3G neighbours cells are not barred.