- This topic has 61 replies, 1 voice, and was last updated 2 years, 4 months ago by sandeep harkude.
27th May 2013 at 13:01 #47392KPGuest
Enable the link adaption and check whether the situation is improved or not.
Reg,30th May 2013 at 11:11 #47393AghaGuest
which is suitable for link adaption either LA or IR for bad radio condition ?10th June 2013 at 10:51 #47394DebGuest
Recently Huawei has shared this formula for TBF drop:
is this OK for use. To me it looks OK.12th July 2013 at 16:04 #47395prasadGuest
How to improve TBF drop in NSN BSCs,
Pls suggest timers which can be changed.26th November 2013 at 12:44 #47396ParthGuest
Pl suggest how to improve TBF Drop3rd December 2013 at 15:20 #47397ashwani sharmaGuest
Is there any parameter in SGSN that can improve the TBF success rate. Or let me ask in this way that is there any parameter of SGSN that can anyway effect TBF success rate.4th December 2013 at 06:16 #47398pixGuest
the only one i know is the T_READY timer. It’s the only one from SGSN that I know of, and I know it has an impact on GPRS QoS. Increasing it should decrease the number of TBF establishments, therefore affecting your TBF estab sr.
pix12th December 2013 at 17:52 #47399ashwani sharmaGuest
for the info. I will check with Ericsson experts about Ready timer. Till now what i understand about this timer from Ericsson docs is as below:-
The READY timer controls the time a MS remains in READY state in the MS and the SGSN. The value of the READY timer may be negotiated between the MS and the network using the GPRS attach or GPRS routing area updating procedure. The default value is used if neither the MS nor the network send another value, or if the network sends this value.
Please do let me know about this parameter. what should be the ideal value? and does it impact any other KPI?23rd January 2014 at 17:46 #47400PritamGuest
Hi please share your experience in
1.How to improve DL LLC discarded frames.
2.TIMER used to tune the TBF drop(NSN hardware and QOS is good).
3.Data in erlang for one time slot and MAX data erlang in one TRX considering GOS.4th May 2015 at 13:11 #47401mohitGuest
Please suggest action plan to improve TBF drop rate in Huawei system .10th November 2015 at 10:05 #47402Ahsan RizwanGuest
hi everyone ,
i am facing high TBF drop rate on some sites in one bsc.on the other hand TBF success rate is ok.kindly share me any suggestion for getting drop rate down.18th November 2015 at 10:55 #47403Rupesh KadamGuest
Although payload is maintained, TBF attempts showing a reduction after SGSN migration30th January 2017 at 08:00 #47404imranGuest
how can i improve UL TBF success rate30th January 2017 at 08:20 #47405Wallis DudhnathGuest
Inputs to help with TBF dropping for GSM.
– Make sure no Hardware problem especially related TRX module. You need to fix Hardware issue first if you found hardware problem
– Make sure no Interference. You have to do re-tune or change frequency that suspected Frequency Interference to improve TBF drop rate
– Make sure No overshooting Cells. You can adjust Antenna Tilt/Down tilt for overshooting cells to improve TBF drop rate and avoid access traffic in low RX level thus can improve TBF drop call.
– Reduce Dynamic PDCH(MAXPDCHRATE) and add static PDTCH to avoid preemption channel by voice services especially for cells with high Voice traffic.
-Shifting Static PDCH from TRX non BCCH to TRX BCCH and make priority setting by set TRX layering priority which can be set by OPTL value in GTRXDEV object.With this strategy data services will be concentrated in TRX BCCH with full power(no power control) thus can improve TBF drop rate and getting better than data services in TRX non BCCH.28th February 2017 at 12:42 #47406yannGuest
how to improve TBF drop