AMR (HR/FR) configuration in 2G Siemens

[pUbLIS]

I've got a BS (2G Siemens) that has a high %BCR and I, looking at the traffic statistics I can see that all its traffic is done in FR. I want to change the HR threshold but I can't understand well how it works.

I think these are the parameters that I need to change:

fullRateActivationAMRtHRESHOLD1 = default value of 3000
fullRateActivationAMRtHRESHOLD1 = default value of 3000

hRActivationAmrThreshold1 = default value of 6000
hRActivationAmrThreshold1 = default value of 6000

I seems like the values are set according to the percentage of busy TCH on the sector... (i.e.) 6000 should be equal to 60%. Is that right?

Isn't there a way to configure that all the traffic should be Half-rate?

Thks in advance

[don_hardiawan]

Dear Friend,..

Can i know wich one Siemens BSC version you are using BR 8 / BR 9 or higher than this ??

From my Experience to Adjust and Activate Halfrate both AMR or Non AMR using this parameter :

EHRACT = True
EHRACTAMR = True

and for Percentage of using HR and FR using this parameter :
HRACTT1 --> for Non AMR
HRACTAMRT1 --> For AMR

the function of HRACTT1 and HRACTAMRT1 as bellow :

The unit is in 0.01% so the value is from 0 -- 10000 (the lower value you set the more HR channel will be used)

according to this formula :
Traffic Load = No. TCH in Bussy State / No. TCH in Enable

so the value of HRACTT1 and HRACTAMRT1 as lower threshold of Traffic Load for decesion using Halfrate Channel...

Regards,...

[pUbLIS]

Dear Friend,..

Can i know wich one Siemens BSC version you are using BR 8 / BR 9 or higher than this ??

From my Experience to Adjust and Activate Halfrate both AMR or Non AMR using this parameter :

EHRACT = True
EHRACTAMR = True

and for Percentage of using HR and FR using this parameter :
HRACTT1 --> for Non AMR
HRACTAMRT1 --> For AMR

the function of HRACTT1 and HRACTAMRT1 as bellow :

The unit is in 0.01% so the value is from 0 -- 10000 (the lower value you set the more HR channel will be used)

according to this formula :
Traffic Load = No. TCH in Bussy State / No. TCH in Enable

so the value of HRACTT1 and HRACTAMRT1 as lower threshold of Traffic Load for decesion using Halfrate Channel...

Regards,...

Most of the network is using BR9.. let me take a minute to read your post and see if I can understand, since I'm just now learning the trade :P

thks+

[pUbLIS]

Is there any way to force the TRX to use only HR?
Will this affect much the sound quality of a call?

thanks

[pUbLIS]

don_hardiawan... it's exactly like you said.
The only thing I wasn't understanding was the threshold for FR.. but speaking with a friend of mine he told me that those FR thresholds aren't relevant because of other 2 parameters that are disabling it.

So, everything you have to configure is the threshold when the BS starts to use HR. If you configure it to "0" it will always use HR.

thanks+

[plannerguy]

hi

this are the parameters in HR and FR
Enabling HR and AMR HR

EHRACT--TRUE
EHRACTAMR---TRUE

Parmeters reuired settings
HRACTT1----HR for T1 (primary)
HRACTT2----HR for T2 (Secondary)
HRACTAMRT1----for AMR HR T1
HRACTAMRT2----for AMR HR T2
FRACTTH1-----for FR T1
FRACTTH2-----FR T2
FRACTAMRTH1---FR AMR T1
FRACTAMRTH2---FR AMR T2
EPAT1----Enhanced pairing T1
EPAT2----Enhanced Pairing T2


Primary is for outercell cell and secondary mention the Innercell

Regards
Plannerguy