- This topic has 56 replies, 1 voice, and was last updated 2 years, 6 months ago by push traffic to 3G.
25th February 2011 at 15:36 #61934alcatelmanGuest
i have tried yoour proposition and everything seems ok now.
But i just observed that more channel requests are going to the GSM band. I increased CRO for the DCS concentris cell to 14dB without improvement.
GSM CRO for neighbour cells are at 0dB.
Pls advice. This started after the Concentric cell implementation.25th February 2011 at 17:07 #61935pixGuest
could you confirm your cell topology ?
you have, for each sector:
1 GSM cell “standalone” (cell type = single ?)
1 DCS cell “concentric” (cell type = single concentric ?)
am i correct ?
why did you implement monoband concentric DCS cell ? don’t you have enough DCS frequencies already ?
i’m not very convinced by your topology, please explain..
to increase normal assignment in the DCS, yes, the idea would be to increase the CRO. Ensure the C2 criteria is enabled in your DCS cell (param_reselect_ind).
With a cro=14dB you should have a nice balance between gsm and dcs. Could you please share your qos stats?
pix28th February 2011 at 11:14 #61936alcatel manGuest
i just checked the NPO and discovered that Penalty Time was set to 31(infinity). I think this could be the cause since:
If penalty time is not infinity,
else if PT=infinity,
Cell is currently under monitoring.
Thanks1st March 2011 at 18:14 #61937pixGuest
yes, you are right.
Set the penalty time to 40s, in order to use C2 = C1 + CRO -TO
that would push a lot more traffic in DCS cell, for sure !
good job 🙂
pix2nd March 2011 at 15:55 #61938alcatel manGuest
Thanks a great deal for the support9th March 2011 at 14:32 #61939External InterferenceGuest
I am haveing uplink interference in a GSM cell on both the fixed frequency TRX and hopping TRX. I suspect external interference. I’ve installed band pass filters without success. Pls advice, it’s really causing problems with customer.10th March 2011 at 05:42 #61940pixGuest
what are the stats for Idle Band measurements, per TRX?
if it is external interference located in the UL GSM band, the only way to properly fix it is to scan the area, fond which frequencies are impacted and what is the source.
Then shut it down.
The cowardly way is to find clean frequencies, knowing that the problem might be on all frequencies or that it can randomly appear anywhere.
pix11th March 2011 at 15:54 #61941alcatel manGuest
thanks pix14th March 2011 at 09:48 #61942alcatel manGuest
After swap from Is it possible to experience issues on 3G2G HO success rate as per NPO KPI point of view, while on user experience everything is ok. I think mayb it is because the SGSN never releases the pdp on 3G after HO.
Pls advise27th June 2011 at 03:31 #61943shailendraGuest
why we cannt define 2g to 3G handover.26th November 2012 at 10:45 #61944AmatigueGuest
I have some problem on my Atcatel Utran: some mobile like blackberry don’t make a resection 2G/3G. please help me !14th October 2018 at 09:01 #61945push traffic to 3GGuest
push traffic to 3G