Configuration of the timers (T305 and T308 NSS et T200 BSS)

[gogotchiya83]

In our network we suspect some TCH Drops comming from NSS part :

From the call flow (standard) we can deduct the condition to respect : T305+2*T308+T3109<(N200+1)*T200

in our case T305 = 30s; T308= 10s; N200=0 et T200=2s for the majority of cells (so we don't respect the condition)

They suggest me to make the change bellow :

T305: 30 --> 2 Sec
T308: 10 --> 1 Sec

Can you PLZ advice me to aplly this change?
CallFlow.JPG

[ninjafine]

Hi! Please check in attachment where this recommendation comes from with statistics results.
Actually N200 wasn't = 0 because this value depends on the control channel types.

Thanks and reps are appreciated.

[gogotchiya83]

Very nice document
If someone can Share his experience in tinunig of these parameters for Huawei network (NSS+BSS ?

[madeira]

I applied this parameters in E/// and Nokia and improve KPI (DCR) from 1.1 to 1% .
There was no impact on other indicators. A reduction in type from the drop T200 and Low ss.

[gogotchiya83]

Tkx for your reply,
What is the value of these parameters ? T305? T308? T200? N200?

Can someone share his experience for Huawei network?

[madeira]

In my trial i use this values :

T200:63-31-38-90-70-29-168
T305:2 Sec
T308:1 Sec
T3109 :1 sec

[gogotchiya83]

What does it means T200:63-31-38-90-70-29-168?

[madeira]

sdcchSAPI0 - facchTCHF - facchTCHH - sacchTCHSAPI0 - sacchSDCCH - sdcchSAPI3 - sacchTCHSAPI3

[k4conk]

but this MSC Level, its mean high level right?

[gwood]

This changes were made in MSC Huawei? E*******?


@ninjafine do you have the scripts for E/// MSC?