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mitch_jones02
2015-07-10, 02:32 PM
Hi,
Would like to ask everyone if you experienced already Nokia sites with very high BTS failures. This problem occurs during busy hour and when HSDPA attempts > approx 6000/hour.
Please note that
- Nokia RU40
- BB util and R99 CE is low around 40%
- HSDPA users is also low and below 240 (WBTS)
- HSUPA users is also low and below 240 (WBTS)
- T'put steps were okay, set to 18.
- HSDPA PS: 6 HSUPA PS: 10 R99CE: 768
- HW: FSMF+FBBA
- Iub: some sites were highly utilized (>70%), some were low.

dtvt2
2015-07-10, 02:57 PM
Hi friend
- Pls check how many local cell group are there
- Try ping test with MTU 1500 at peak hour

mitch_jones02
2015-07-10, 03:09 PM
Thanks friend. We've tried already activating 2 local cell group for some sites with high users but still no improvement.
For sites with low users, there's only 1 LCG since WBTS users is around 100 only.

Will try ping test during BH.

william.dg08
2015-07-11, 12:06 PM
Hi, check the control plane capacity. Use the following counter:

M5004C1 / PEAK RL SETUPS PER SECOND
Description: Peak radio link setup messages handled per second, where handled means setups
that are not rejected because of congestion.

There are some limitations, for control plane
56 RL/s (2FSME)
22 RL/s (1 FSMD)
70 RL/s (FSMF + 2xFBBA)

W./

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william.dg08
2015-07-11, 12:15 PM
By the way, for more detail about CAPACITY, check the following doc:
"Managing WCDMA RAN and Flexi Direct Capacity"
Issue 03I
Approval Date 2014-09-19
127 pag.

This doc appear in Information Browser Library RU40 (new NOKIA NED )

W./

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mitch_jones02
2015-07-13, 10:00 AM
hi william, actually i've also checked that one and Average RL setup message queuing time, it's normal.
One thing i've noticed is that BTS failures occurs when HSDPA attempts reaches around 6000 per cell per hour.

Nway, i will double check again Peak RL setups to verify.

mitch_jones02
2015-07-13, 10:58 AM
hi i've check peak RL setups, max is only 10 for two sites (FSMF+FBBA).
any other idea?

dtvt2
2015-07-13, 11:35 AM
which transmission type do you use? IP or ATM

mitch_jones02
2015-07-13, 11:53 AM
Transmission type is IP.
BTW, we're encountering BFD link failure for those sites with high Iub utilization. And that BFD link failures pertains to Iub capacity already (for upgrade).

Lamboy
2015-10-09, 08:11 PM
Hi there,
have u checked Congestion control frame from 067?
if there are a lot loss appear, escalate to transport team.

BR//