- This topic has 6 replies, 1 voice, and was last updated 9 years, 2 months ago by to MAC (ghamiz).
7th September 2009 at 15:56 #58746MacGuest
I have a severe problem of poor GPRS Attach Success.
1. What are the reasons for Attach fail?
2. There are 2 counters that show exceptionally high values
There is no documentation available anywhere.
Can anyone pl help me out on this issue?
Thanx in advance!!8th September 2009 at 05:13 #58747BijoyGuest
1.Illegal MS,LA not allowed,Illegal ME,GPRS service nor allowed,Gr fail,Ge fail,No suitable cell in LA & protocol error.
To answer the 2nd part,can I know what are the reasons for Attach failure in your system15th September 2009 at 13:06 #58748MacGuest
Amongst all the failure causes given by you, I have already checked & found that failures are more due to the already mentioned counters. There is no hard blocking & soft blocking is well under control!
And I am looking for the reasons for the attach fails!!! RF part is being considerably taken care of..But I am doubting the behavior & communication of SGSN with self & other fellas.15th September 2009 at 13:08 #58749MacGuest
Sorry for the late reply Bijoy. The site seemed to be down for some days. Anyways, just to share with you, I changed the INIT MCS (DL/UL) from 6/5 to 2/1 & I got good improvement in the Attach Success rate!!!28th June 2010 at 16:34 #58750debsGuest
what parameters you can use for improvement GPRS Attach succes rate for Ericsonn equipement ?5th July 2011 at 08:57 #58751RaghuGuest
What will be the possible reasons for Poor Email send and receive success rate5th July 2011 at 13:09 #58752to MAC (ghamiz)Guest
well m a bit confused, as the error causes that you had mentioned (FAIL_GPRS_Attach_Due_SGSN_ERR & FAIL_GPRS_Attach_HLR_VLR_ERR) are purely core end and protocol related issues, so how come changing initial coding schemes improved the attach success rate? did u see improvement in VLR and SGSN errors as well or they are intact…???
waiting for your response..