- This topic has 60 replies, 1 voice, and was last updated 9 years, 11 months ago by boss.
5th October 2010 at 13:59 #64534hekriGuest
I’m working in a Huawei network (BSC6000). We are using dual band cells. The DCS1800 cell is having congestion, while the GSM900 not. I want to shift some traffic from DCS1800 to GSM900 in order to avoid congestion. GSM900 is layer3 and DCS1800 is layer 2. All HO parameters have default values. Please tell me which and how to tune this parameters in order to balance the load and eliminate congestion at DCS1800.
Thanks5th October 2010 at 14:08 #64535AlexiaGuest
Down tilt 1800 cells. Parameters won’t do you favor. By the way what is your configuration? i.e how many trxz do you have for 1800 and 900 cells respectively?5th October 2010 at 14:22 #64536hekriGuest
Thanks for responding.
The site has full configuration for both bands 4/4/4.
The tilts for 1800 cells are:
cell_1 5 mechanic, 3 electric
cell_2 5 mechanic, 1 electric
cell_3 4 mechanic, 0 electric
The site is a high site at the top of a hill and has a wide coverage area.5th October 2010 at 14:27 #64537GsmGuest
Maybe your 900 layer is not so clear like 180.Check for possible interference at 900MHz(bad quality at 900 can be a reason)5th October 2010 at 14:29 #64538GsmGuest
Seems that you are working in same company with some other members here like eagle.5th October 2010 at 14:40 #64539hekriGuest
I work with a small network optimization team, and i think i would have known if a college has joint this forum.
Regarding the interference, in this case there is no interference in these cells.5th October 2010 at 15:13 #64540GsmGuest
What about 900 tilts,they have to be at least 3 deegres less than 1800.Anyway i will try tomorrow to sugest some parameters for traffic balance.6th October 2010 at 06:33 #64541hekriGuest
Yes, 900 cells electrical tilt is 3 degrees less then 1800, that is a standard i guess, because it is used in all dual band cells.6th October 2010 at 06:53 #64542GsmGuest
you are right,default tilts are as you said but every case should be specific.please give me some minutes and i will suggest some parameters that you can test6th October 2010 at 15:59 #64543GALSENGuest
Check your Handower margin parameters.
Regards7th October 2010 at 07:59 #64544EagleGuest
I suppose u have default parameters so you have Layer HO threshold set to 25 on 900 and 1800.
To optimize the traffic change the Layer HO threshold on 1800 from 25 to 40. i think u will get some good results 🙂7th October 2010 at 12:47 #64545GsmGuest
Hi Eagle, seems that you are not soffering from trafic balance between 900 and 1800 layer.You just need some sugestion regarding frequecy plan that you want to use in Shkodra area.About layer threshold i sugest exact value 27.Try it and tell me7th October 2010 at 12:50 #64546EagleGuest
Not Shkodra another city 🙂7th October 2010 at 12:52 #64547GsmGuest
So this mean that finally you fixed Shkodra.7th October 2010 at 12:53 #64548EagleGuest