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hi.. has anybody experienced this? i have a cell with only ~15% sdcch utilization but experiencing sdcch blocking. what could be the cause? thanks..
hardware issue….or media having errors ….
Hi
It may be due to LAC boundaries.
Also check neighbouring cell’s LAC
due to frequent updations SD blocking is occuring.Hope this help.
//BR
JaspreetHi jaspreet.
Dont you think SDCCH peak Utilisation will be high in case of very High LU.Br\\
Bijoybijoy sir,
you are right(I misread the question as only SD blocking) but In case it is utilized at peak then it wud lead to SD congestion not Blocking because at that time no attempt for SD channel will be made so no point of blocking.
If I m wrong then, you can pls elaborate this as it wud add to my knowledge.
thanks
Hi Jaspreet
Which system are you working on?
That would help me to explain better.
Also I would like to rectify you that even if there is no free SDCCH (i,e SDCCH Congestion),BSC has no intelligence that it will prevent MS for SDCCH requests to that cell.Br\\
BijoyHi Bijoy
I m working on huawei system.
Ok Jaspreet
If in Huawei system you are facing such type of issue,check for the following
1.check for HDLC congestion.
2.Check whether you have set “Concentric cell”=”yes” for a normal cell.
3.Check if the feature “Dynamic MAIO” is kept “ON”Br\\
BijoyHi Bijoy,
Can SDCCH hop & In case of SDCCH when on Non BCCH TRX will radiate by which freq.
Makarand
SDCCH TS will hop if on Hopping TRX,otherwise not.hi bijoy.. how about in nokia system? what should i check when im experiencing sd blocking but low utilization? please help.. thanks,,
I have this alarm for nokia bts – Working SDCCH channel below threshold. please i need assistant on howto resolve this issue. thanks.
Kenji
Check my reply on the topic”Abrupt nature of SDCCH Blocking in N/W”.
Austin
This ratio is set in BSC .The parameter name is “ALSDC”.The recommended value is 30%.
To handle this alarm,you can check the following
1.If any TRX containing SDCCH has gone faulty or blocked.
2.If the parameter ALSDC is set too high.
3.Wheteher Dynamic SDCCH is disabledBr\\
Bijoy
