voice quality over 3G

[gogotchiya83]

Dear experts,

We have a serieux problem in our network,
The voice quality is very bad, sometime we hear some noise during the speech (AMR),
do you have any advice ? what should i to verify and to check?
i notice that the problem is seeing even in some area with good coverage :(
We are using ALU equipement (ALU UA07.1)

Regards//

[tthach830]

Dear experts,

We have a serieux problem in our network,
The voice quality is very bad, sometime we hear some noise during the speech (AMR),
do you have any advice ? what should i to verify and to check?
i notice that the problem is seeing even in some area with good coverage :(
We are using ALU equipement (ALU UA07.1)

Regards//

First isolate where the problem is. From what you are saying, it sounds like it's RNC/MSC/Switch level issue. Check and see if it is an overall network issue. If it is call up the MSC/Switch and have them check the core components. It could be bad hardwork at the Switch or DS3 is dirty.

[adewijaya]

1. what's type codec AMR did used ? 12.2kbps or else?
2. how many value BLER on there?
3. good level not always related to be better quality (this is not linier)

[gogotchiya83]

Thanks men for you answer...

we observs that all complaints are comming from user using I-phone mobile !!
I made a serch in the net and i found other operators suffer from the same problem especially with iPhone mobiles

Find bellow a video describing this noise :

YouTube - ‪iPhone 3G weird noise when calling‬‏ (http://www.youtube.com/watch?v=MYeh3v_LDEg)

Any advices?

Regards//

[gogotchiya83]

the problem is especially for I-phone mobile :(
I found that many operator suffer with this problem
Any one can share his experience with that?

[adewijaya]

in Blackberry seems like this, i think on smartphone case. Another experience please welcome

[moh_sulaiman]

We observed the same problem in other phones also , but didn't find any solution till now .

:(

[gogotchiya83]

Whta kind of equiments are you using? (UTRAN + CORE)?

[moh_sulaiman]

(UTRAN + CORE) both huawei

[adewijaya]

Whta kind of equiments are you using? (UTRAN + CORE)?

UTRAN HW + CORE NSN

[gogotchiya83]

UTRAN ALU & CORE HW

Any advices?

[adewijaya]

Okey, make some conlusion here : all NE included Huawei network, next question : How about in network that didn't using Huawei network? open informations are welcome

[jimjim]

Hello there,

Is this problem reproducable?

:)
Regards,

[adewijaya]

Hello there,

Is this problem reproducable?

:)
Regards,

How about other equipment beside Huawei Network? is there any information?

[arisondang]

How about other equipment beside Huawei Network? is there any information?

Another Question :
1. First Carrier or 2nd Carrier?
2. 1 SCCPCH or 2 SCCPCH implemented?
3. PCH/FACH implementation or not?

Thanks

[psiloip]

Cyprus Telecomms is also plagued with this issue. We have found that switching the 2G-3G handover off greatly reduces (but does not aleviate) the problem. We have ERI core and NSN/ERI RAN. We, initially, spotted this problem with the blackberry phones but soon discovered than even HTC or SE handsets do exibit the same behaviour (some models more than others).

We have opened a CSR with ERI about it.

[gogotchiya83]

For our case,we are discussing with ALU this problem, they promize us to upgrade the RNC ...waiting for an amelioration

FACH & PCH activated
the phenomena hapenned in both for site with 2 freq and for the other with juste one freq...

[AMAORI]

this issue is caused by the Ciphering during Handover ( interfreq, interband(U900 to U2100, interRAT) .

[dk2000]

HI,

I agreed with AMAORI.

Please check the ciphering parameter.

In 2G network, we must disable ciphering.