- This topic has 98 replies, 1 voice, and was last updated 10 years, 7 months ago by anand.
2nd September 2009 at 07:18 #52099BijoyGuest
Definitely not2nd September 2009 at 09:35 #52100KRISHGuest
U MEAN WILL NOT IMPROVE SD BLOCKING.2nd September 2009 at 10:39 #52101Gerald ThomasGuest
Please can someone help me:
1. i don’t where i can find the RACH time
2. where i can the lapd from 16 to 32k
my equipment is ZTE2nd September 2009 at 10:43 #52102Gerald ThomasGuest
Also, the site has three sectors but only sector_2 is having low Total Number of SDCCH Attempts and extremely low Number of Successful SDCCH Assignment and these affect the Accessibility to SDCCH.
Please can someone help!3rd September 2009 at 09:11 #52103BijoyGuest
SDCCH Blocking due to LOC update cannot be minimised by LAPD multiplexing change3rd September 2009 at 13:22 #52104gerald thomasGuest
In ZTE, we have Minimal Signal Strenght of MS Uplink RACH Access (RachMin, -dm)and RACH Load Indication Threshold, there values are 125 and 60 respectively.
what is your suggestion?4th September 2009 at 08:37 #52105BijoyGuest
Minimal Signal Strenght of MS Uplink RACH Access should be around -109 dBm
RACH Load Indication Threshold should be 80%4th September 2009 at 09:37 #52106krishGuest
But here i am getting 2 % in sd blocking imrovement after lapd from 32 to 64 which is due to lac update.
If ur point of view its not possible can u explain why its not possible in lac update?5th September 2009 at 12:53 #52107BijoyGuest
2% improvement is not a conclusive improvement.
since SDCCH Holding Time during LOC update is high,increasing LAPd from 16K to 32K will not help much.
If u really want to bring down the SDCCH Blocking due to LOC update,change its LAC,u will observe very good results5th September 2009 at 13:10 #52108gerald thomasGuest
i will make the changes and observed18th September 2009 at 14:22 #52109gerald thomasGuest
we have made the changes but the situation is still the same.
so do you have anymore suggestion?19th September 2009 at 07:01 #52110BijoyGuest
If your problem was due to LOC update,changing the LAC of that cell as that of its neighboring cells should have helped.Carrier addition & SDCCH addition is the last resort then.
U can also increase the T3212 timer to 4-6 hours(if not already done).but this might lead to poor PSR21st October 2009 at 06:35 #52111Seles83Guest
What are causes of high TCH Blocking on same cells. How do i cap the trend…my vendor is ericsson.24th October 2009 at 13:59 #52112jairohilaGuest
i m working in bsnl project plz help me for improve tch drop.there is tch drop on site around 7 to 14%.plz suggest me wht i do 2 improve it.
thanx24th October 2009 at 16:18 #52113krishGuest
is there dual band?