Cell reselection parameters from GSM to UMTS

[adelmarco]

Hi all,

New in 3G field , I have some shadowing zones regarding the Cell reselction GSM to UMTS, have someone by any chance a document detailing the condition, parameters and process relating to it.
meantime need to know the meaning of Qsearch_I and default value?

Thanks in advance

[wolverine]

Qsearch_I defines at which 2G signal strength level the MS will start measuring 3G neighbours cells. The default value is 7 which means always (i.e. the MS will measure 3G neighbour cells irrespective of the 2G signal strength).

[cdmahn]

When the mobile camped on a GSM cell, it will execute the UTRAN cells measurements if the received signal level of the GSM serving cell is below or above a given threshold, determined by parameter Qsearch_I, as follow:

Qsearch_I Threshold to measure UTRAN cells
0 < -98 dBm
1 < -94 dBm
2 < -90 dBm
3 < -86 dBm
4 < -82 dBm
5 < -78 dBm
6 < -74 dBm
7 Alway
8 > -78 dBm
9 > -74 dBm
10 > -70 dBm
11 > -66 dBm
12 > -62 dBm
13 > -58 dBm
14 > -54 dBm
15 Never

[adelmarco]

Thanks guys appreciate

[paboya]

Bros,

In GSM/DCS any C1 and C2 parameter
What is the term in 3G System ??

Sorry still newbie in 3G system

[eritelecom]

are all vendors using this Qsearch_I parameter?
else, which vendor is using it?

Thx a lot

[adelmarco]

Bros,

In GSM/DCS any C1 and C2 parameter
What is the term in 3G System ??

Sorry still newbie in 3G system

Instead of C1 and C2 criterion , UMTS have S and R criterion S for selection and R for Reselection
S:
cell selection in the protocol 25.304, as follows:
Srxlev>0 & Squal>0
Where, Squal=Qqualmeas-Qqualmin; EC/NO
Srxlev=Qrxlevmeas-Qrxlevmin-Pcompensation.RSCP of the CPICH
R , S must be satisfied
the servig and the neighbour cell are ranked according a specific Q hysterisis and Q Offset

Cheers

[wolverine]

Yes, it is a 3GPP parameter, so if your vendor supports IRAT re-selection (all do) they will support this parameter.

are all vendors using this Qsearch_I parameter?
else, which vendor is using it?

Thx a lot

[kakayanu]

yeah i think all vendor use it..in siemens network qsearci, qsearch and qsearchoff we set =always

[TammamH]

Hi all, a have i strange problem:
the 2G (********) to 3G (Huawei) reselection can't be achieved except when i use Huawei mobile "120E" and this case done on one cell, and one the another cells the 2G3G reselection is done very fast and smoothly
i have checked if there is any differences in 3G & 2G Parameters for the tested cells, but they are matched

Thanks in advance