AMR 2G Problem

[josef]

Dear All,

We have a big problem on AMR 2G. We have just implement it on our network 2G/3G. The problem is that the codecs are not changing when C/I (or AMR quality estimate) change. In some cells it is changing and in others NO. The thresholds are Ok in ALL the cells:

FRT1 = 6dB, FRT2 = 12 dB, FRT3 = 16 dB, HRT1= 11 dB, HRT2 = 14 dB

I checked all the cells, and they have the same AMR parameters.

Find attached our AMR behaviour.

Since now 5 days I'm working on it, but no success

Please some ideas brothers !!!

Josef

[RF engineer]

Dear All,

We have a big problem on AMR 2G. We have just implement it on our network 2G/3G. The problem is that the codecs are not changing when C/I (or AMR quality estimate) change. In some cells it is changing and in others NO. The thresholds are Ok in ALL the cells:

FRT1 = 6dB, FRT2 = 12 dB, FRT3 = 16 dB, HRT1= 11 dB, HRT2 = 14 dB

I checked all the cells, and they have the same AMR parameters.

Find attached our AMR behaviour.

Since now 5 days I'm working on it, but no success

Please some ideas brothers !!!

Josef

Can you share the logfile.

BR
RF

[josef]

Can you share the logfile.

BR
RF

Dear bro,

please find the log file: Nemo files

Thank u by advance

Josef

[mbo]

Hello Bro,
1/Which is the vendor
2/At ALCATEL you have to define the codec of starting used on every HO, you must to have the same thing in the list of your parameter settings. Can you to Check please.
BR

[josef]

Hello Bro,
1/Which is the vendor
2/At ALCATEL you have to define the codec of starting used on every HO, you must to have the same thing in the list of your parameter settings. Can you to Check please.
BR

The vendor is NSN. Our initial codec (for call setup & HO) is the same: 5.9 Kbps for HR and FR

It is not related to this

Thank u brother

Josef

[radio_network]

check AMR implemetation at TRX/RTF level.

[mbo]

I recommend you to modify the codec_init in the high value (12.2 for the FR and 7.95 for the HR) because it impacts directly on your vocal quality.
I am going to verify for thresholds...

The vendor is NSN. Our initial codec (for call setup & HO) is the same: 5.9 Kbps for HR and FR

It is not related to this

Thank u brother

Josef

[josef]

check AMR implemetation at TRX/RTF level.

Brother,

how to check implementation at TRX/RTF level ?

Thank's

Josef.

[RF engineer]

Dear bro,

please find the log file: Nemo files

Thank u by advance

Josef

Dear
As i see drive test you have a lot of handover and as AMR initial code or start mode is used for call setup and handover , you initial codec or start mode is 5.9?
BR

[josef]

Dear
As i see drive test you have a lot of handover and as AMR initial code or start mode is used for call setup and handover , you initial codec or start mode is 5.9?
BR

yes it is

Br

Josef