UMTS PS RAB Congestion - Huawei

[khurrambilal01]

Hi Friends,

I have Huawei 3G network, there is high PS RAB congestion and from Huawei PS congestion counters i have checked below things:

• lub congestion (VS.RAB.FailEstabPS.lubband.Cong)
• CE congestion (VS.RAB.FailEstabPS.CE.Cong)
• Code Congestion (VS.RAB.FailEstabPS.Code.Cong)
• Power congestion (VS.RAB.FailEstabPS.Power.Cong)

Out of the total PS RAB congestion 60% is Power congestion but rest 40% is not from any of the above reasons.
Can you share what can be the other causes, Like HSPA Congestion or some thing else?

[khurrambilal01]

Hi friends,
Anyone plz comment? Thanks!

[khurrambilal01]

Nobody can answer

[Fado]

hi check below counters too,
- VS.RAB.FailEstPs.Code.Cong: PS RAB establishment failures due to code congestion
- VS.RAB.FailEstPs.Power.Cong: PS RAB establishment failures due to power congestion
- VS.RAB.FailEstPs.ULCE.Cong: PS RAB establishment failures due to UL CE congestion
- VS.RAB.FailEstPs.DLCE.Cong: PS RAB establishment failures due to DL CE congestion
- VS.RAB.FailEstab.PS.DLIUBBand.Cong: PS RAB establishment failures due to UL Iub bandwidth congestion
- VS.RAB.FailEstab.PS.ULIUBBand.Cong: PS RAB establishment failures due to DL Iub bandwidth congestion
- VS.RAB.FailEstabPS.Unsp.Other: PS RAB establishment failures due to congestion in other resources than the previous 6 cases
- VS.RAB.FailEstabPS.RNL.Other: PS RAB establishment failures due to any RNL related reason other than the previous 10 cases

• Lack of system resources like memory, high CPU load, etc.
- VS.RAB.FailEstPS.NResAvail: PS RAB establishment failures due to shortage on system resources

• Any other reason: following counter indicate failure due to any other reason apart from the previous ones
- VS.RAB.FailEstabPS.Other.Cell: PS RAB establishment failures due to any other reason except the previous 13 cases

[miri]

Hi,

try to see how many times and how long the cell is in Overload state:
VS.LCC.OLC.UL.Num - Number of UL Overload Congestions for Cell
VS.LCC.OLC.DL.Num - Number of DL Overload Congestions for Cell
VS.LCC.OLC.UL.Time - Duration of UL Overload Congestion for Cell
VS.LCC.OLC.DL.Time - Duration of DL Overload Congestion for Cell

Btw, which software release do you use? The counter names change from release to release.

[khurrambilal01]

We are using RAN 12.0

Hi,

try to see how many times and how long the cell is in Overload state:
VS.LCC.OLC.UL.Num - Number of UL Overload Congestions for Cell
VS.LCC.OLC.DL.Num - Number of DL Overload Congestions for Cell
VS.LCC.OLC.UL.Time - Duration of UL Overload Congestion for Cell
VS.LCC.OLC.DL.Time - Duration of DL Overload Congestion for Cell

Btw, which software release do you use? The counter names change from release to release.

[mobile4lte]

ye,i understand now ,why my 3G network speed could be so slow.

[phuvuong_uk]

Hi Friends,

I have Huawei 3G network, there is high PS RAB congestion and from Huawei PS congestion counters i have checked below things:

• lub congestion (VS.RAB.FailEstabPS.lubband.Cong)
• CE congestion (VS.RAB.FailEstabPS.CE.Cong)
• Code Congestion (VS.RAB.FailEstabPS.Code.Cong)
• Power congestion (VS.RAB.FailEstabPS.Power.Cong)

Out of the total PS RAB congestion 60% is Power congestion but rest 40% is not from any of the above reasons.
Can you share what can be the other causes, Like HSPA Congestion or some thing else?

Do you use 2 carriers for 1 cell? If yes, check the Service Priority for RNC and cell.

[maoper11]

check the RTWP, and if you have 2 carriers configure some feature for load balancing.

[sant]

make sure the coverage is good...
I think the best way to overcome the congestion is by downtilt...

Regard,