Does AMR HR degrades or improves UL Quality?

[Fado]

hi all,
Do anyone know or tested if huge increase in AMR HR will have any effect on UL quality?
I will post thanks for all replies,
Thanks,

[ashraferto]

its depend on your setting... can you gave us more details

[Fado]

its depend on your setting... can you gave us more detailswhat settings you mean?the increase is due to traffic growth and also decrease in tch availability..why the setting it low threshold will effect the quality?

[gogotchiya83]

The AMR function helps improve the capability of voice frames to resist interference. With the AMR function, call duration can be prolonged within an area where the signal quality is poor. However, the capabilities of SACCH frames have not been improved with the AMR function. The determination of call drops is based on the fact whether the SACCH frames can be correctly demodulated. With the AMR function enabled, the call duration can be prolonged within an area where the signal quality is poor because users seldom terminate calls. As a result, there will be a high probability that call drops occur.
To resolve the problem, modify the values of radio link counter AFRDSBLCNT/AHRDSBLCNT and AFRSAMULFRM/AHRSAMULFRM for AMR calls to ensure that their values are the same as those for non-AMR calls. In this case, however, the AMR function cannot be fully achieved.

Because when the statistics of BER of AMR and that of non-BMR are collected, the algorithm is different, which will lead to the case that the proportion of uplink receiving quality at level 6 and 7 for AMR is larger than that for non-AMRs.
Currently, the calculation accuracy of receiving quality for products is improved by adjusting the corresponding software parameters through version optimization in BSS9.0. The specific parameters are as follows:
Cell software parameter command: SET GCELLBTSSOFT: IDTYPE=BYID, CELLID=0, ITEMINDEX=57, ITEMVALUE=219;

Note: After the AMR is enabled, the proportion of uplink receiving quality at level 6 and 7 deteriorates, which is only the change in statistics, and does not affect the actual user perception and UM interface quality.

Other vendors (including E******* and Nokia Siemens Networks) also have the problem that the proportion of uplink receiving quality at level 6 and 7 deteriorates after the AMR is enabled.

[Fado]

thanks gogotchiya83 for comprehensive description....in our case the site to site distance is 5-6 km and they are located in rural areas...in summer time we have more outages that is why we used amr HR threshold to a lower value to avoid any blockings that might occur due to cell outages...but strangely we didn't see any major degradation in UL quality it was stable in fact even traffic increased..so i would like to know AMR FR to AMR HR comparison for UL quality only...is speech codecs effecting ul quality stats?

[k4conk]

hi all,
Do anyone know or tested if huge increase in AMR HR will have any effect on UL quality?
I will post thanks for all replies,
Thanks,


Hi Fado, can you tell me where setting AMR HR & how the result KPI after enable it's?