- This topic has 61 replies, 1 voice, and was last updated 5 years, 4 months ago by ANISH.
17th June 2009 at 09:45 #45830asoGuest
increase the TX-integer so that the collision will be reduced.15th August 2009 at 06:11 #45831vipin kumar singhGuest
pls tell me how is it possible high SD failure,if Sufficeint SD timeslot available and no media isssue.16th August 2009 at 18:06 #45832krishGuest
Hi aso ,
if u have tx integer 10 and if u increase upto 50 then i think is there any chance to increase the call set up time? and by increasing the tx rach failure will be decrease?
i want to clear the meaning of tx = its time between rach retransmission. ok is it right?20th August 2009 at 05:50 #45833KRISHGuest
CAN ANYBODY HAVE ANSWER ? PLZ SHARE IF SOMEONE KNOWS/31st August 2009 at 04:51 #45834BijoyGuest
There is a subtle difference between Max. no. of retransmissions & Tx-Integer.
Tx: It indicates the number of time slots in an interval when an MS sends continuously multiple channel requests.To reduce the collisions on the RACH and to raise the efficiency of the RACH, access algorithm is defined This parameter works together with the configuration of the CCCH(parameter S)When T increases, the interval between two adjacent channel requests increases, and RACH conflicts decrease.
When S increases, the interval between two adjacent channel requests increases, and RACH conflicts decrease, thus improving the usage of AGCH and SDCCH.
The access time of the MS, however, is prolonged and the network performance is threatened when T and S increase. Thus, an appropriate T value should be adopted to ensure that S is as low as possible, and that AGCH and SDCCH are not overloaded24th February 2010 at 04:43 #45835sharad kumarGuest
what is sd drop, sd blocking,tch drop and tch blocking.
what are the cause of these drops and blocking.6th July 2010 at 10:28 #45836CHRIS AGHAGuest
the analysis of QoS KPI SDCCH always read between 0.6 t0 0.86 % on the average.
pls what is responsible for this high value12th August 2010 at 07:03 #45837Yogesh ButtanGuest
Can anyone explain how to improve DLQ (RxQual)?12th August 2010 at 10:41 #45838SHELDONGuest
Here are some possibilities:
1. Check your frequency plan and make sure it’s good…this is fundamental.
2. Check your hopping parameters (HSN and MAIOs, hopping reuse pattern, etc)
3. Make sure you use regular antenna azimuths throughout the network as much as possible. Also make sure your cells are not overshooting.
4. Activate power control and DTX if you haven’t done that already.
5. Check for faulty TRXs.
6. Check your network synchronisation
7. Check for external interference.
SHELDON16th August 2010 at 15:28 #45839SanthakumarGuest
Can anyone describe, as in my Network SDCCH call Reestablishment counter counts has increased, what may be the reason..?17th August 2010 at 11:46 #45840Santhakumar SGuest
Hi, this is santhakumar..how to reduce penetration of side lobe of an antenna?
other then applying electrical tilt and POC value?17th August 2010 at 15:51 #45841chris AghaGuest
thks sheldon, I will apply suggestions given17th August 2010 at 18:49 #45842pixGuest
there are some metallic devices that can be used to reduce the side lobes (like deflectors panels on each side of the antenna)… but i never saw that on the field. It probably works only on very specific antenna models.
If you don’t want the electrical tilt then the only other solution is to change the antenna. Buy one which has a narrower Horizontal-HPBW.
pix19th August 2010 at 10:34 #45843Santhakumar SGuest
In GSM what are all the AMR CODEC’s are using?can anyone explain about this?28th September 2010 at 04:38 #45844RevathiGuest
What is Side Lobe Attenutaion in Antennas?. How to calculate it?