Reduce Handover attempts

[justdream]

Dear Huawei Guys,

what's the best parameter to tune if you would like to reduce the handover attempts from GSM cell to DCS cell "co-cell"?

[jukreew]

I used Hierarchical handover
G9 cell layer = 3
G18 cell layer = 2
and adjust inter layer Ho threshold for control handover

[don_hardiawan]

Dear Huawei Guys,

what's the best parameter to tune if you would like to reduce the handover attempts from GSM cell to DCS cell "co-cell"?

Dear Friend,..

I usual adjust this parameter to reduce HO attempt from GSM to DCS or vice versa... :

After Make Layering different for GSM and DCS, example DCS Cell Layer : 2
and GSM Cell Layer : 3

Adjust some parameter :
1. Min UP/DL Power on HO Candidate Cell (HO Data)
2. Inter-layer HO Threshold / Hysteresis (HO Data)
3. Min Access Level Offset (adjacent Cells)
4. Inter-layer HO Hysteresis (on adjacent Cells)

Hope it can help you....

[justdream]

Dear don_hardiawan
Do you have account at skype?

[coolashishsaxena]

Hi All,

HOW to improve IRAT-PS for cells which are having good IRAT CS.
anything on parameter setttings. we cannot change 2D and 2F event it should remain constant.

thanks in advance

[haq_enam]

[QUOTE=don_hardiawan;112807]Dear Friend,..

I usual adjust this parameter to reduce HO attempt from GSM to DCS or vice versa... :

After Make Layering different for GSM and DCS, example DCS Cell Layer : 2
and GSM Cell Layer : 3

Adjust some parameter :
1. Min UP/DL Power on HO Candidate Cell (HO Data)
2. Inter-layer HO Threshold / Hysteresis (HO Data)
3. Min Access Level Offset (adjacent Cells)
4. Inter-layer HO Hysteresis (on adjacent Cells)

I am having problem while handover from DCS to GSM... DCS RXlev -90 and Quality is Bad(7) and GSM -66 no Handover occur... No congestion in the GSM. Call droped then go to GSM.. HO relation defined.

GSM to DCS hO no problem...
Parameters for DCS Cells(layer 2)

1. Min UP/DL Power on HO Candidate Cell --0/8
2. Inter-layer HO Threshold / Hysteresis --30/2
3. Min Access Level Offset -----10
4. Inter-layer HO Hysteresis (on adjacent Cells)

Parameters for GSM Cells(layer 3)

1. Min UP/DL Power on HO Candidate Cell --0/8
2. Inter-layer HO Threshold / Hysteresis --5/2
3. Min Access Level Offset -----0

Pls provide the solution if u know about that

[dodotiro]

@ hag_enam : great explanation. btw do you have a command log to set those parameters because i'm newbie in huawei 2G

[ayman.absi]

[QUOTE=don_hardiawan;112807]Dear Friend,..

I usual adjust this parameter to reduce HO attempt from GSM to DCS or vice versa... :

After Make Layering different for GSM and DCS, example DCS Cell Layer : 2
and GSM Cell Layer : 3

Adjust some parameter :
1. Min UP/DL Power on HO Candidate Cell (HO Data)
2. Inter-layer HO Threshold / Hysteresis (HO Data)
3. Min Access Level Offset (adjacent Cells)
4. Inter-layer HO Hysteresis (on adjacent Cells)

I am having problem while handover from DCS to GSM... DCS RXlev -90 and Quality is Bad(7) and GSM -66 no Handover occur... No congestion in the GSM. Call droped then go to GSM.. HO relation defined.

GSM to DCS hO no problem...
Parameters for DCS Cells(layer 2)

1. Min UP/DL Power on HO Candidate Cell --0/8
2. Inter-layer HO Threshold / Hysteresis --30/2
3. Min Access Level Offset -----10
4. Inter-layer HO Hysteresis (on adjacent Cells)

Parameters for GSM Cells(layer 3)

1. Min UP/DL Power on HO Candidate Cell --0/8
2. Inter-layer HO Threshold / Hysteresis --5/2
3. Min Access Level Offset -----0

Pls provide the solution if u know about that


I'm not sure, I think the problem with the setting: 2. Inter-layer HO Threshold / Hysteresis --30/2, HO will not occur from DCS to GSM till GSM level is greater than (-90 - Inter-layer HO Threshold - Hysteresis) which is -58
So decrease the value of Inter-layer HO Threshold

[haq_enam]

[QUOTE=haq_enam;126637]


I'm not sure, I think the problem with the setting: 2. Inter-layer HO Threshold / Hysteresis --30/2, HO will not occur from DCS to GSM till GSM level is greater than (-90 - Inter-layer HO Threshold - Hysteresis) which is -58
So decrease the value of Inter-layer HO Threshold


Problems are being solved.... Actually P/N criteria did match that is the reasons not to make HO to outdoorc cells.... We reduced No of sample of MR and reduce timer to make decesion.... I hope it will help to others....

[justdream]

[QUOTE=ayman.absi;128518]


Problems are being solved.... Actually P/N criteria did match that is the reasons not to make HO to outdoorc cells.... We reduced No of sample of MR and reduce timer to make decesion.... I hope it will help to others....

Dear, what's your new values?

[RFestudiante]

Optimization document

[f_tito]

I used Hierarchical handover
G9 cell layer = 3
G18 cell layer = 2
and adjust inter layer Ho threshold for control handover

Yup, I agree with you :)

[mohyedeen_alkousy]

[QUOTE=ayman.absi;128518]


Problems are being solved.... Actually P/N criteria did match that is the reasons not to make HO to outdoorc cells.... We reduced No of sample of MR and reduce timer to make decesion.... I hope it will help to others....

Hi
but the default values of P/N criteria for HCS handover (layer handover ) are already have logical values ( 1.5 sec/1 sec) so how could this short time cause handover delay and call drop ??? unless u have setting different than default

also the parameter Inter layer handover thresholds is set to 30 in DCS which means that for any Rxlev < -78 dB the priority setting in (GSM-->layer 3 and DCS-->layer 2) is not considered in neighbor selection algorithm , so the mobiles should make handover to 900 directly because 900 always have stronger levels.
can u give more explanation about your solution in this case??