- This topic has 8 replies, 1 voice, and was last updated 13 years ago by kawa.
27th April 2008 at 07:46 #52148kawaGuest
I have question about reducing TRX from a cell, when asking for reduce TRX for a cell they will software blocking TRX but still ohysical exist in the cell and also in hopping list what will happen???27th April 2008 at 11:25 #52149pixGuest
the hopping list is a list of frequencies on which the active trx will hop (= synthetized frequency hopping)
when locking a trx from the OMCR, the trx will not carry any traffic, and if you were using BBH or No-Hopping, then the frequency “attached” to this TRX will not be sent “on air” anymore.
pix27th April 2008 at 11:36 #52150kawaGuest
my network use BBH and what I want is that if the removed frequency for raleted TRX remain in the hopping list I think system will try to allocate this frequency to MS and when there is no dedicated TRX for this frequency is cause performance bad isn’t ????????27th April 2008 at 14:47 #52151PixGuest
i seriously doubt something like this can happen, but it depends on your vendor implementation.
In BBH, all active MS’s will hop on all BBH frequencies.
Do you see a call drop/sdcch drop of 100% or a tch assignment failure of 100% ?28th April 2008 at 11:15 #52152kawaGuest
NO I have n’t 100% SDCCH drop or CDR or TCh assignment what I notice after the software blocking the SDCCh drop and TCH blocking exculding HO increase it.28th April 2008 at 17:48 #52153pixGuest
ok, so for your problem, i don’t think hopping is the issue. actually, i would suspect two possibilities :
1/ one trx is faulty, but the wrong TRX was locked –> the faulty trx carries more traffic, therefore, there is more call drops, etc.
2/ the faulty trx is locked, indeed, so the other trx’s are going to carry more traffic. It is a possibility that another trx is also faulty, so by locking one TRX, you actually reveal another faulty trx.
that sounds more probable than a wrong hopping management, but who knows…29th April 2008 at 05:27 #52154kawaGuest
thanks a lot for explanation29th April 2008 at 07:01 #52155Da ArchitectGuest
Which vendor? if ericsson check the counters CNRELCONG and TNRELCONG, are they increased,if yes, this mean that you needed this TRX, and you shouldn’t lock it. Unless you are ready with cell load sharing strategy. on the other hand, in BBH number of frequencies = number of TRXs, and when you lock a TRX, then you are locking the Frequency you assigned to it, this means hoping will not include this frequency.
Regards,29th April 2008 at 12:42 #52156kawaGuest
dear Da Architect
thanks for you too