- This topic has 154 replies, 1 voice, and was last updated 15 years, 7 months ago by pix.
31st July 2006 at 03:00 #35523hungtranGuest
you are right, I am in vietnam. I work in viettel network. Thank for your kind.
I don’t understand clearly why you can say that SD fail, the subcribers will not “fell”?
because, they can have to try 2 or 3 times to make a call or sms? they will complain us quality of service.
Can you give me that indicator of Vinaphone or mobile?31st July 2006 at 03:21 #35524PixGuest
The user will not have to perform the call more than once to go through, even though the indicator SDCCH failure rate is “high”. Just take your experience as a reference : how many times do you have to push the “call” button to make or answer a call ? only once…
Those failures are counting the “automatic” RACH attempts of the mobiles, as well as ghost RACH, etc… If you don’t agree, then perform drive-tests and experience the SDCCH failures. You’ll see that it’ll never happen.
This threshold is always the same, whichever the network. I told you already… alcatel officially recommend a threshold of 20%.
Contact the RTAC for additional infos…11th August 2006 at 20:14 #35525David A.Guest
We have Nortel BSC & BTS equipment and have observed a sudden increase in SDCCH drop rate.
Anyone else noticed this with Nortel equipment?12th August 2006 at 00:02 #35526PixGuest
Do you mean you’ve rolled out a new Nortel network and you’re now observing a higher SDCCH drop rate than with the previous network ?
Network-wide, or only on one BTS ?
What is the SDCCH drop rate ? (daily average & busy hour)17th August 2006 at 14:08 #35527ArpanGuest
what can be reason of handover failure except interference or TCH assignment failure??18th August 2006 at 14:26 #35528David A.Guest
This increase in SDCCH Drops from 0.8% to 3% occurred on an existing Nortel network. The change was observed across the network.18th August 2006 at 18:18 #35529RobinGuest
Pls. check which sites SDCCH DR increased so much.IF these sites are at the same area,it is better to check ulink and dlink interference.18th August 2006 at 18:18 #35530RobinGuest
Pls. check which sites SDCCH DR increased so much.IF these sites are at the same area,it is better to check ulink and dlink interference.22nd August 2006 at 04:50 #35531dinaGuest
Could you tell me the target value for SMS Success Delivery Rate ? How can we count that indicator (the formula and the trigerring point)? Do any of you have the documentation about this? I apologize if this topic doesn’t corelate with SDCCH, but I really need your help..Thanks a lot..22nd August 2006 at 07:51 #35532Iwan SuwandiGuest
I have problem with my site
1. I have a problem of TCH DROP Bad Quality looks acceptable from stats . SDCCH CSSR is within our KPI’s and theres is no congestion on TCH and SDCCH. I have drive test this site and during the drive test no interference found. Can some one help me22nd August 2006 at 11:23 #35533Nitin KGuest
Have you checked for the UPLINK QUALITY for the particular cell?24th August 2006 at 05:28 #35534RobinGuest
Do you have any information about mobile hangging up problem or hangging up time very long time?28th August 2006 at 17:56 #35535RAVI BSNLGuest
I want to know about TCH and SDCCH congestion. Please explain6th September 2006 at 16:11 #35536SachinGuest
Have u checked the C/I on the BCCH and the non-bcch carrier’s.
Check out the foll options :
1. Where is the same BCCH freq being used in the vicinity ?
2. What are the chances that it can hit ur cell and spoil the Drop call Rate ?
3. If it is being used in the vicinity then at what height are the antenna’s mounting ?
4. Try changing the freq if ur freq plan permits u to do so or try downtilting the antenna electrically ?
For more queries firstname.lastname@example.org
Sachin7th September 2006 at 22:07 #35537z_aliGuest
what are the average KPI values of should be considered to monitor the network, for NSS.
I have an assingment on NSS related KPI to optimize the network any one can help me in this regards?
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