- This topic has 43 replies, 1 voice, and was last updated 10 years, 3 months ago by Gokul.
15th September 2009 at 11:27 #58793AashGuest
RACH ACCESS MIN too much as I saw -110 even the BTS dose not support weaker than … depend on RX_lev_access min as well; and don’t forget the phantom rach that will be arrive to the bts, with that you can check the T200, N200 with that is better if you check the Uplink\downlink balance,
good luck16th September 2009 at 11:12 #58794KrishkaGuest
ACCMIN set to 104 – no changes in any statistics. From my point of view it can be problem with timers or with MS…16th September 2009 at 12:02 #58795BijoyGuest
Have you checked that whether this is happening for any particular type of CM_Service_Req(like MOC,MTC,etc), or for all types16th September 2009 at 12:34 #58796KryshkaGuest
From my log, I found the only CM_req type:
“Meaning of establishment cause: Answer to paging TCH/F in dual rate”. Immediate assignment messages for “good” assignment and bad do not have any differences.17th September 2009 at 04:34 #58797BijoyGuest
Have you checked all the paging related parameters?
You can also check from MSC side why the paging response is so poor.17th September 2009 at 09:47 #58798KryshkaGuest
I checked MSC parameters, – paging strategy – 1 page – TMSI, second after 6s – IMSI. In MSC there are only two timers for paging control – T3113 – 6s, T3101 – 4s. So MS should try to send any message but he don’t. Now checking Abis and TRH devices loads…17th September 2009 at 12:41 #58799hiyaGuest
put the RACh Access min to -105 as recommended before if you are using the access min -104,
Change T200 but first inform us the existing value then we decide,
did you checked the uplink\downlink balance?
regards17th September 2009 at 12:45 #58800SamuelGuest
yes very simple and nice recommended points; thanks,
please inform us the value of T200, result of Uplink\downlink balance then we see the result17th September 2009 at 15:06 #58801KryshkaGuest
In ericsson I didn’t find how to set RACH access min, – there is only accmin… The balance from MRR shows only few dB difference to stronger DL side. Where can I find T200 timer settings, BSC?18th September 2009 at 05:43 #58802BijoyGuest
Is this happening only in some particular cell or for all cells in the BSC.
Also please tell me the value of
3.CESTIMMASS18th September 2009 at 06:26 #58803KryshkaGuest
Timer T200 settings are 240ms and the K value (window size) to 1 for OML link and 2 for RSL link.
CESTIMASS=100118th September 2009 at 11:17 #58804BijoyGuest
Is it happening in all cells of the BSC?
Have you tried the follwing:
1.Have you shifted SDCCH in a different CHGR.
2Is SDCCH HO enabled in your BSC.21st September 2009 at 10:54 #58805KryshkaGuest
It happens in whole network. SDCCH HO was active, but disabled in the weekend – still any visible improvement. SDCCH shift to other CHGROUP still didn’t implemented – I will check in the next steps.28th September 2009 at 07:39 #58806KryshkaGuest
It’s really interesting that the same thing happens not in system BH but also at the night time when all traffic is really low. As example phone didn’t answer to immediate assignemnt in 03:05 am. It’s eliminate all issues that rise from resources congestion. Still any answer…28th September 2009 at 08:26 #58807PixGuest
There are a lot of support already, I don’t want to add any confusion. Just, I read that you have done a drivetest with NEMO, and the NEMO phone itself doesn’t answer to the immediate assgn.
That’s great 🙂
Could you copy the trace (all the layer 3 messages content + timestamp) here ?
According to your description, I expect the following messages:
1/ CHANNEL REQUEST
2/ IMM. ASSG.
But perhaps I am missing out some of them. Please list all of them 🙂