-
Member
Reputation: 76
1 out of 1 members found this post helpful.
Nokia HSDPA High BTS Failures
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.
-
Post Thanks - 1 Thanks
-
2015-07-10 02:32 PM
# ADS
Circuit advertisement
-
Re: Nokia HSDPA High BTS Failures
Hi friend
- Pls check how many local cell group are there
- Try ping test with MTU 1500 at peak hour
-
Post Thanks - 1 Thanks
-
Member
Reputation: 76
Re: Nokia HSDPA High BTS Failures
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.
-
VIP Member
Reputation: 1248
Re: Nokia HSDPA High BTS Failures
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./
Please adds reputation if you liked this POST!!!
-
Post Thanks - 1 Thanks
-
VIP Member
Reputation: 1248
Last edited by william.dg08; 2015-07-11 at 12:19 PM
-
Post Thanks - 5 Thanks
-
Member
Reputation: 76
Re: Nokia HSDPA High BTS Failures
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.
-
Member
Reputation: 76
Re: Nokia HSDPA High BTS Failures
hi i've check peak RL setups, max is only 10 for two sites (FSMF+FBBA).
any other idea?
-
Re: Nokia HSDPA High BTS Failures
which transmission type do you use? IP or ATM
-
Member
Reputation: 76
Re: Nokia HSDPA High BTS Failures
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).
-
Junior Member
Reputation: 10
Re: Nokia HSDPA High BTS Failures
Hi there,
have u checked Congestion control frame from 067?
if there are a lot loss appear, escalate to transport team.
BR//
Bookmarks