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Umbrella Cell handover

Kibibi - 1st October 2017  (10:16 GMT)

what switch name on Nokia is representing enable/disable Handover due to DL interference/UL interference?

Max - 12th September 2011  (05:57 GMT)

Hi,we enabled Umbrella in 900 Nokia,but got problem 1800 high traffic.How we can stop Umb HO after 80% of loaded traffic on 1800?

ATTO - 7th January 2011  (07:32 GMT)

Thanks Pix,

I'll give you a feedback as soon as we will implement this feature.

Pix - 6th January 2011  (16:15 GMT)

Atto,

When you work with 900/1800 network, you should make a decision :
which handover cause will you use to push traffic from 900 to 1800 cells ?
- cause 14 : umbrella to mini cells
- cause 21 : 900 cells to 1800 cells.

I recommend the cause 21 if you didn't attend to the specific alcatel training about multiband management.

cell type = Single for all cells
**in GSM900 cells:
CELL_RESELECT_OFFSET = 0dB
RXLEV_ACCESS_MIN = -104dBm
EN_PREFERRED_BAND = enable
L_RXLEV_CPT_HO(900,1800) = -80dBm
MULTIBAND_TRAFFIC_CONDITION = Any_Load

**in DCS1800 cells:
CELL_RESELECT_OFFSET = 22dB
RXLEV_ACCESS_MIN = -90dBm
EN_MULTIBAND_PBGT_HO = disable
L_RXLEV_DL_H = -86dBm

That's a good start to balance traffic, quite simple to deal with. Other parameters don't have any effect on this method.

Beware that cause PBGT is forbidden from 1800 cells to 900 cells, and that the handover cause 5 (low level in DL) is the only way to exit a 1800 cell towards a 900 cell.
PBGT HO is available between two 1800 cells, of course.

Regards,
Pix

ATTO - 6th January 2011  (13:31 GMT)

Hello Pix,

This is the first time we want to implement Upper/Lower layer in Our network (Alcatel vendor) :
Upper Layer : 900 BTS
Lower Layer : 1800 BTS

If i understand well your recommandations, sectors of the 900 band would be declare as SINGLE cells instead of Umbrella, and then sectors from 1800 bands as Micro cells ?

What others parameters should I tune apart of CAPTURE HO and disabling POWER BUDGET HO?

Thanks in Advance

parminder singh - 29th November 2010  (17:24 GMT)

Can anybody tell me how to improve RX Qual in Motorola.

pix - 5th March 2007  (23:05 GMT)

hi nishant, sorry i don't know which command... but i'm CERTAIN there is a type of handover that acts like a "capture ho". Try to find it...

Ok, let's see.. what you could do : list down all the cases of Handovers in Nokia system.

1 due to low RXLEV in DL
2 due to low RXLEV in UL
3 due to poor RXQUAL in DL
4 due to poor RXQUAL in UL
5a due to too short timing advance
5b due to too far timing advance
6 due to POWER BUDGET
7 due to high level of interference in UL
8 due to high level of interference in DL
9 umbrella / upper layer cell -> lower layer cell
10 900 cell -> 1800 cell
11a inner zone / outer zone
11b outer zone / inner zone
12a AMR HR -> FR
12b AMR FR -> HR

... what else ??
for instance, cause 9 and 10 are kind of identical to a "capture ho".

Nishant - 5th March 2007  (04:29 GMT)

hi pix,

The option for capture handover is not there in Nokia .

If you know the commands can you tell me.

pushpraj pachori - 4th March 2007  (06:08 GMT)

working of surf in MOTOROLA bts

Nishant - 3rd March 2007  (15:49 GMT)

Sure i will try this and let you know.

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