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11th August 2008 at 07:36 #52039mmGuest
whatis the difference between SDCCH drop and congestion3rd September 2008 at 15:41 #52040help meGuest
can you help me?
mean: TCh mean holding time28th September 2008 at 00:00 #52041MzescavtGuest
Thanks funny site28th September 2008 at 05:52 #52042pixGuest
tch mean holding time: average duration during which a TCH timeslot is allocated to a certain call.
for instance TCH MHT = 20s, it means that your subscribers get a TCH for 20 seconds. Then they probably handover to another cell, so the TCH in this cell is deallocated.
This is NOT the average call duration. You should look at the MHT along with the “HO per Call” indicator.
As far as i remember:
call duration = TCH MHT * (HOperCall + 1)12th November 2008 at 12:00 #52043ahmedGuest
what’s the difference when we say
1- Call success rate > = < % 2- Call set up > = < %12th November 2008 at 12:42 #52044pixGuest
call success rate = call setup sucess rate * (100% – call drop rate)13th November 2008 at 07:06 #52045AyatGuest
Some vendor define Call success (100-Call drop rate(%)).
could you explain yhese formula
call success rate = call setup sucess rate * (100% – call drop rate)13th November 2008 at 10:12 #52046pixGuest
as you said, it is vendor dependent.
the formula is quite simple… call success is representing the success of a call, from call setup to the call release.
it’s a very global indicator.
the (100% – call drop rate) is useless, because it’s just another way of displaying the call drop ratE. It shows exactly the same info, there is no value-added to such indicator.16th November 2008 at 14:32 #52047abdelGuest
can you tell me how i can calculate the HOpercall
thanks16th November 2008 at 17:38 #52048pixGuest
number of TCH established for incoming HO / number of TCH established by “normal” call setup12th March 2009 at 06:43 #52049nitinGuest
what is mean holding time12th March 2009 at 18:42 #52050pixGuest
= duration of a call, in average.14th March 2009 at 09:47 #52051nitinGuest
how can we define cell utilization??????15th March 2009 at 13:41 #52052AyatGuest
Cell utilization -Traffic (erl)*100/Traffic design (ERL table (B))
CELl utilization Per CELL
Cell _1 with real traffic =10 erl
and TCH=12 channel and GOS =2%
so we have to review erlang table B , we will find the design traffic at TCH = 12 and GOS =2% =6.615
Design traffic =6.615 so cell utilization = 10*100/6.615
i hope it is clear16th March 2009 at 05:04 #52053nitinGuest