Problem in Handover

[haq_enam]

We recently swap e******* to Huawei and have not fimillier with parameters... One of the building we have done DT and found that outdoor(Serving) rxlevel is -95dBm and indoor(neigbor) is -65dBm but it should have oppsite. As indoor site in higher priority that outdoor and clean frequency is used....


I dont no any parameters that will help to solve the problems....It ishappening only dedicated mode but idel mode it is okey... Pls provide solution if u have...

DL PC is off

[RF engineer]

We recently swap e******* to Huawei and have not fimillier with parameters... One of the building we have done DT and found that outdoor(Serving) rxlevel is -95dBm and indoor(neigbor) is -65dBm but it should have oppsite. As indoor site in higher priority that outdoor and clean frequency is used....


I dont no any parameters that will help to solve the problems....It ishappening only dedicated mode but idel mode it is okey... Pls provide solution if u have...

DL PC is off

Dear

In huawei the 1800 have higher priority ( layer 2) and 900 have (layer 3).What you have to check in system parameter called Cell layer if the are not as above changed , then you have another parameter to control HO between two band called inter-layer HO threshold if this parameter is put high value let say 45 it is better to change to 35 or less if you see still have good RF condition.

BR

[haq_enam]

Dear

In huawei the 1800 have higher priority ( layer 2) and 900 have (layer 3).What you have to check in system parameter called Cell layer if the are not as above changed , then you have another parameter to control HO between two band called inter-layer HO threshold if this parameter is put high value let say 45 it is better to change to 35 or less if you see still have good RF condition.

BR

Thanks for reply..

Site is already layer 2 and inter-layer HO threshold is 25.

Any other parameters to change or modify

[RF engineer]

Thanks for reply..

Site is already layer 2 and inter-layer HO threshold is 25.

Any other parameters to change or modify

is it defined as neighbor.

BR

[theumar@hotmail.com]

Layer Settings are correct and based on algorithm call should not be camped on outdoor 900 cell. Even if HO triggered due to Quality it should be on 2nd best cell. Can you check before HO trigger, what was the quality of connection and Check in L3 signalling msgs that prior HO in MR that MS sent to network what was the ranking of nbr cells

Probability of following parameter to be wrong is least but do check them

1. Inter Layer HO Hysterysis should be around 4
2. BQ Margin set on relationship level default is 64 ( means 0 )normal range is 68 ( 68- 4= 4 dB margin) setting high values of BQ margin on a specific relation makes it more favourable candidate in case of quality HO triggered

[riyantoyadi]

what's BQ Margin set? please describre this

[theumar@hotmail.com]

HW Parameter to Control the selection of candidate cell in case of urgency quality reason HO Triggered

[riyantoyadi]

please share to us any related document about this. We will very appreciated

[haq_enam]

is it defined as neighbor.

BR

Neighbor is defined.....it is not happening in all floors

[riyantoyadi]

please check this

1. Power Control setting
2. try to turn off PC on indoor building

[RF engineer]

Neighbor is defined.....it is not happening in all floors

Dear

The two snap is different in the first one the call in 900 and second one is on 1800 so handover happen in the same floor? and the source cell and Neighbour are on the same BSC if not check External HO relation defined.

What about the PBGT HO threshold and inter-cell HO hystersis and try to delete the neighbour and redefined again .

BR

[haq_enam]

please check this

1. Power Control setting
2. try to turn off PC on indoor building


U r asking dor both PC off...WE did UL PC ...

[haq_enam]

Dear

The two snap is different in the first one the call in 900 and second one is on 1800 so handover happen in the same floor? and the source cell and Neighbour are on the same BSC if not check External HO relation defined.

What about the PBGT HO threshold and inter-cell HO hystersis and try to delete the neighbour and redefined again .

BR

Both are in 4dB...HO between 900 and 1800....