- This topic has 8 replies, 1 voice, and was last updated 8 years ago by appu.
7th November 2003 at 07:33 #36825ErickGuest
I work for an operator whose vendor is Alcatel and we are on BSS release B6. I have noted several cases of sudden increase in SDCCH ACCESS failure of 100% in quite a number of cells in the Network. In this situation, the SDCCH Success traffic is zero but supprisingly, i have got a very good call success and call setup rate. This could indicate that most calls are getting to TCH phase. Could anyone who has noted this situation assist me in solving it. NB: Results observed from the NPA.7th November 2003 at 16:04 #36826MomuGuest
Call set up success rate is a function of SDCCH drop and TCH assignment unsuccess rate. Since no calls are being established on the cell with 100% SDCCH ACCESS failure, SDCCH Drop = 0. The only unsuccess on TCH stage is during HO. The traffic being seen on the cell is only HO traffic. The only solution to this kind of problem, is either sector recreation or BTS recretion – srart with sector recreation at the OMCR – if not solved, recreate the BTS.22nd March 2004 at 12:02 #36827artisteGuest
pour bien comprendre ton problème, il faut savoir ton SDCCH ACCESS failure est radio ou BSS.
si c’est un problème radio il faut vérifier:
1.RX cables de la BTS
2.Interferences on SDCCH
3.unbalanced power budget
and after you can see creation on OMCR.28th June 2006 at 10:38 #36828optimGuest
how can I sol a sdcch congestion28th June 2006 at 11:09 #36829VanderleyGuest
Add additional SDCCH’s, or mixed TCH/SDCCH. Optimize location area borders. Change the behaviour in idle mode.24th July 2012 at 21:32 #36830mohsenGuest
I just want to know how can i improve SDCCH ACCESS rate in NOKIA BSC ?30th July 2012 at 11:25 #36831imqureshiGuest
main vendors never include sdcch
access in cssr formula thats why
you have excellec cssr this is the rason you need to monitor
sdcch access phase 100% fail might be due to faulty hardware or interference issue
peace! 😀31st October 2012 at 13:33 #36832optimaGuest
I just want to know how can i improve SDCCH ACCESS rate in NOKIA BSC ?15th February 2013 at 17:56 #36833appuGuest
how to improve SASR of ALU ZTE border cell.