- This topic has 183 replies, 1 voice, and was last updated 15 years, 2 months ago by Sk.
28th July 2006 at 01:11 #37378PixGuest
you’ll need to be more precise, because it is a vast topic. If you’re starting from scratch, the best way for you is to buy a basic GSM book that will summary all the fundamentals.13th August 2006 at 16:16 #37379TufailGuest
Can you provide me some stuff on Frequency loading..
Thankx n regads
firstname.lastname@example.org August 2006 at 16:28 #37380TufailGuest
v hav some strange problem in our nw, our vendour is ericsson…
problem is like this.
Durin drive test..
when a test call is initiated the full Rxlevel, FER n quality are good..
but when a voice call is intiated the full Rxlevel drops and Rxquality degrads to 7, FER degrads too…
v r using DTX.. i know tht i should consider RX Sub values..
Need some advice abt this problem..
thanks in advance.
We r using15th August 2006 at 15:09 #37381SudhakarGuest
Hai can any body tell me resion for hand-over failure in GSM n/w (Except congestion)
G.Sudhakar15th August 2006 at 15:33 #37382VanderleyGuest
With test call you mean call to a an answering machine which talks all the time (for example exact time). Then you don’t have DTX in DL direction and the RxFull is correct. If you have DTX (normal voice call) then you have periods of silence where nothing is transmitted except the TS code. The RxFull will take into account also the silence with Q = 7; RxSub takes into account only training sequence and this is the correct value.16th August 2006 at 04:02 #37383TufailGuest
form test call i mean call to MSC, where it generates a continous noise…
as per my exp.. with nokia we used same test call n there was no such problem…
i really want some solution to this problemmm..
i understand what u r talking abt..
but when using full the RXLevel drops to -098dbm beloww..
near the site..
thanks16th August 2006 at 10:56 #37384FrancisGuest
I want to Thank you Naveen for the link to the GSM Overvierw at ictfaculty.ir, iread it and it was cool.CDMA is gaining grounds around the world ,what happens to the huge GSM investments since their architectures are not compartable, will GSM just fade away,
Idachabafe@yahoo.com16th August 2006 at 13:18 #37385prasadGuest
how we finalise that, one particular site is suitable for stm-1/ pdh/ stm-16/ stm-16 (mk-II)16th August 2006 at 14:51 #37386VanderleyGuest
Just stop the DL DTX for a while and check. Make sure which on TRX you are for later troubleshooting.17th August 2006 at 12:24 #37387yogesh_rfGuest
can anybody tell me the reason ,iam on GSM900,no hopping site4/4/4 confg. codec rate is GSM FR.now my SQI coming is either coming 12 or 21(except callattempt, call end ,handover etc.)I am fully aware of SQI and the affecting parameters(like BER,FER,HANDOVERS,HIGH TA,DTX,CLASS 2 BITS EFFECTS,CODEC RATE used etc.)
yogesh_rf23rd September 2006 at 09:32 #37388Banibrata DoluiGuest
Sir , I want to know how TEMS investigation measures Rx-Lev,Rx-qual,BER,FER,DTX,C/I,C/A,RLT,Call drop,SDCCH blocking,26th September 2006 at 13:44 #37389falesugeneGuest
Most sites unless it is located remotely very far away (>40km) away from others have neighbours assigned to then. this is to facilitate handover when a MS is moving. but sometimes when a the neighbours assigned are very far so that at the time when they are supposed to be handed over to their RXLEV is quite poor, there is HO failure.26th September 2006 at 22:07 #37390pixGuest
something wrong in this thread, i can’t post my answer… help ?27th September 2006 at 08:14 #37391Forum ModeratorGuest
[Moderator’s note: This forum has a very strong filter to stop unwanted posts. Please email your post to service at erlang.com so we can add it manually. Please include a link to this thread.]11th October 2006 at 19:55 #37392hashemGuest
i am hashem from kurdistan north iraq
these are 2 portofilio sites which evry body which work in telecomunnicaion can use that ,
with best regards
cell planner engineer