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Call drop in 3G -UMTS

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pix - 12th April 2017  (12:42 GMT)

hi Nios

To reduce or increase the coverage of a cell, you may (primarily) tune the CPICH power :
primaryCpichPower
Amos: get utranCell primaryCpichPower
By default, use 330 (ie. 33dBm)
Dependencies: primaryCpichPower less than maximumTransmissionPower

Decreasing the cpich will reduce the cell coverage, but also decrease the Ec/No of the users inside the cell. They will "hear" more interferences.

A good way to check the coverage distance of a cell is to extract the counter "pmPropagationDelay", at RBS level (class prach)
Amos : pmx prach pmPropagationDelay -m 3 -a
Within one sector, only analyse cells with highest amount of samples (ie. where the UE are camping).

Regards,
pix

Nios BY - 11th April 2017  (20:53 GMT)

I work on Ericsson 3G equipment (DUW) I have a lot of drop call in CS and PS_RAB.

What is the parameter of the power to decrease the power of the cell so as not to go very far finally to avoid the degradation of the signal.

What is the maximum distance in 3G cell must cover to prevent its degradation and avoid congestion.

What are the most commonly used power settings

Wallis Dudhnath - 15th July 2016  (14:33 GMT)

For Call drop (Voice, Data, etc..) I would recommend a Network audit.
Areas to focus on:-

- Activated Network Features (basic / optional)
- Resource Usage
- Licenses
- Traffic Profile / Dimensioning
- Policy Settings
- Quality of Service
- RF setup (and possible optimisation)
- Stability of the Transmission Network (MPLS-TE, SDH, etc..)

kallo ibrahima - 14th July 2016  (12:02 GMT)

Good Morning
Im kallo, working on ZTE equipement. I have some difficult to improve 3G call drop CS domain.

I have check and found that the main 3G CS Call drop reasons are:
1-Other reason
2-RAB Release
3-Soft Handover/ Hard handover
4-Other procedure (very high)
5-Call re-estabilshment.

I need some help please

Ajaz Ahmad - 1st June 2015  (06:44 GMT)

Call Drop Reasons and Solutions

soukaina youssfi - 8th May 2015  (14:39 GMT)

help me with 3g dropped call

Pawan Sharma - 5th November 2014  (12:03 GMT)

Hi ,

Tune Physical Channel reconfig switch.

It will help to reduced Call drop.

Qual - 4th November 2014  (18:30 GMT)

Probably for drop there are 3 reasons
1.SoHo
2.neighbor
3.UlSynch
4.Drop due to others-
1.Pilot Pollution
2.hardware/Software issue
3.SC collision
4.issue in nearby site
5.Nodesynch Phase Drift alarm
6.MP Load /Dc Load /Cc Load


heath check is required to be done earlier .

Kimhourt chann - 8th September 2014  (04:16 GMT)

Dear all,
could you provide me detail about drop call in wcdma.

Pawan Sharma - 30th July 2013  (10:07 GMT)

Call drop can be because of poor coverage(TP value is high):-

1. TP Value is high.

2. Congestion on target Cell

3. Missing Neighbor.

4.INSYNCID & OUTSYNCID mismatch

5. Inter frequency missing neighbor.

6.Due to alarm & Hardware issue

7.Pilot pollution

8. Scribbling code collision

Other messages

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Last modified: 26 November 2014

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