View Full Version : Basic knowledge E1 Calculation
Hii friend,
This is E1 Calculation Base on Radio Configuration of Cell.
BR//
f1cy
hassen
2008-12-13, 05:01 AM
Hii friend,
This is E1 Calculation Base on Radio Configuration of Cell.
BR//
f1cy
what about LAPD ,configuration 4/4/4 at minimum require 3 ts 64kb/s
1 site 4+4+4 = 27 ts
what about LAPD ,configuration 4/4/4 at minimum require 3 ts 64kb/s
1 site 4+4+4 = 27 ts
As i know,
1 TRX = 2 ts
12 TRX = 24 ts
1 E1 = 32 ts
If 1 site config 4/4/4 = 12 TS, need 1E1 star 31
CMIW
cekerayam
2008-12-26, 05:21 PM
As i know,
1 TRX = 2 ts
12 TRX = 24 ts
1 E1 = 32 ts
If 1 site config 4/4/4 = 12 TS, need 1E1 star 31
CMIW
you can configure 15 TRX with only 1E1, using Abis optimization technique. i will send the document separately.
cekerayam
2008-12-26, 05:34 PM
what about LAPD ,configuration 4/4/4 at minimum require 3 ts 64kb/s
1 site 4+4+4 = 27 ts
Hi,
1 E1 = 32 Time Slot. 1 timeslot will be used by Link management (Ts 0).
12 TRX = 2x12 Ts = 24 Ts
12 TRX need 12x32 Kbps (0.5 Ts) = 6 Ts <--LAPD/TRX Signalling
12 TRX need 12x16 Kbps (0.25Ts) = 1 Ts <--- BCF Signalling
Total = 24 Ts+6Ts+0.25Ts = 31 TS equal to 1E1.
We can configure 15 TRX using 1E1 (using Abis Optimization technique).
tks
you can configure 15 TRX with only 1E1, using Abis optimization technique. i will send the document separately.
can you share Abis optimization technique, thx alot bro :D
hassen
2008-12-26, 11:39 PM
what about LAPD ,configuration 4/4/4 at minimum require 3 ts 64kb/s
1 site 4+4+4 = 27 ts
TRXs/site--- --------------Time slot for signaling
1 TRX, no concentration --- 1
2 TRXs, concentration 2:1--- 1
3 TRXs, concentration 3:1--- 1
4 TRXs, concentration 4:1 ---1
...................................................................................
Time slots for traffic--- Time slots per TRX, total
2 ---------------------------3
4 ---------------------------2.5
6 ---------------------------2.33
8----- ----------------------2.25
It means 4 TRXs, concentration 4:1(0.25) =>2.25*4=9
configuration 4+4+4 need 9 * 3 = 27
ie 27 Time slot 64Kbit/s
The benefit of LAPD concentration is a reduced number of required physical links between the BSC and the RBS
LAPD concentration is recommended to be used for RBS sites with 2 TRXs or more per cell when traffic signalling is not too high.
Examples of transmission savings assumes no use of CS 3/4 or EGPRS, i.e. no use of 64 kbit/s Abis paths per BPC
http://www.emoticone-gratuit.info/avatar/avatar%20divers%20(196).jpg
Hassen
ghassen
2009-01-08, 08:26 AM
it depend from manufucturer techniques for pcm configuration and also from which codec scheme are used on the air interface when you are using gprs or edge and this is what we call flexible abis alocation strategie and it is not relevant for all equipment it's different from nokia side to siemens
example : speech
1 trx to 2 trx = 1 lapd at 16 kb/S
more than 2 trx at least 1 lapd 64 kb/s
yup it varies from vendor to vendor , like in
a) Motrolla they use their own interface " MAbis" and you configure RSL per site basis rather than per TRX :) ( interesting )
b) Alcatel use different Multiplexing schemes for RSL mapping per TRX basis eg 16k Static multiplexing, 16K statistical multiplexing , 64 k statistical multiplexing , no multiplexing where OML is configured on per site basis (as usual mentioned in GSM specs )
c) Siemens , Nortel, Nokia , Huawei use RSL per TRX and OML per site basis ..
well FOR EDGE , GPRS your Abis planning is required , like in Alcatel with B8 version if you are configured MCS9 on whole TRX then 1 TIME SLOT will be mapped on 4.8 X 1= 4.8 NIBBLES ( where 1 TS on Abis = 4 Nibbles )
well in new version like B9 , B10 of Alcatel they have introduced " Flexible Sharing of Abis resources " per site basis and you will find same features in SIEMENS , Huawei etc etc
i try to explain TRX MAPPING on LAPD channels as per my best knowledge
correct me if i m wrong cuz we all in the phase of learning
Regards,
Faib
cekerayam
2009-01-08, 10:32 PM
can you share Abis optimization technique, thx alot bro :D
Hi,
As promised, attached is some slide about abis optimization. actually, its depend on vendor how to configure abis optimization. this is just for your review.
kamnikot
2009-01-26, 11:52 PM
Thanks pal for the share
i thinks these Docs clears thing up
papanyajosh
2009-01-30, 03:43 PM
please help me, how to download file of each posting ?
ThePyramid
2009-01-30, 09:08 PM
Thanks ,man.
ThePyramid
2009-01-30, 09:11 PM
Hi,
1 E1 = 32 Time Slot. 1 timeslot will be used by Link management (Ts 0).
12 TRX = 2x12 Ts = 24 Ts
12 TRX need 12x32 Kbps (0.5 Ts) = 6 Ts <--LAPD/TRX Signalling
12 TRX need 12x16 Kbps (0.25Ts) = 1 Ts <--- BCF Signalling
Total = 24 Ts+6Ts+0.25Ts = 31 TS equal to 1E1.
We can configure 15 TRX using 1E1 (using Abis Optimization technique).
tks
Thanks ,man.
ThePyramid
2009-01-30, 09:11 PM
Hi,
As promised, attached is some slide about abis optimization. actually, its depend on vendor how to configure abis optimization. this is just for your review.
Thanks ,man.
papov
2009-02-09, 07:56 PM
hello, i'm new here and i can't download the attachments can u up load it
thanks in advance
diggs
2009-02-09, 08:25 PM
What a wealth of knowledge in just one thread. Thanks guys!
edmond
2009-11-07, 12:31 AM
Hii friend,
This is E1 Calculation Base on Radio Configuration of Cell.
BR//
f1cy
It very useful doc can you please upload for rapidshare, i will really appreciate or send to my email adress "hektornew@gmail.com"
Thanks in advance
vitchi
2010-02-27, 04:33 AM
is that someone can help me because I can't download the attached file
tnx
taomomteling
2010-03-10, 11:25 PM
Here the dimensioning rule of the BSS part for ALU technology (Abis interface in cluded at page 54),
Enjoy it.
Cheers,
Abderrahmane,
taomomteling
2010-03-10, 11:28 PM
Here the dimensioning rule of the BSS part for ALU technology (Abis interface in cluded at page 54),
Enjoy it.
Cheers,
Abderrahmane,
Abis Allocation result in xls file:
http://www.4shared.com/file/238255806/12f5ebd6/Abis_TS_Allocation.html
If you want to add thanks and reputation i'll not say NOOOOOOO,
Cheers,
Abderrahmane,
boneshaker
2010-03-23, 05:06 PM
Abis Allocation result in xls file:
http://www.4shared.com/file/238255806/12f5ebd6/Abis_TS_Allocation.html
If you want to add thanks and reputation i'll not say NOOOOOOO,
Cheers,
Abderrahmane,
thanks for this share bro.
vitchi
2010-03-23, 11:17 PM
god job taomomteling
chiku
2010-04-20, 10:11 PM
good docs
thanks and rep added
paboya
2010-04-21, 11:00 AM
depend on ur vendor... ??
Each Vendor have a calculation for E1 need..
what about LAPD ,configuration 4/4/4 at minimum require 3 ts 64kb/s
1 site 4+4+4 = 27 ts
Cafumana
2010-04-22, 07:54 PM
Thanks in advance
SCHERIFFHELMY
2010-04-22, 09:58 PM
Dear F1cy
E1 config is affected by 3G traffic uploading
Have you docs for this
best regards
SCHERIFFHELMY
2010-04-22, 10:03 PM
Hi friends
Attached GPRS opt process
hoping it would be useful
SCHERIFFHELMY
2010-04-22, 10:05 PM
May anybody upload E1 config upon 4shared
best regards
sammy
2010-04-23, 05:01 PM
Thank you for your message
nhato
2010-05-05, 06:55 AM
Hii friend,
This is E1 Calculation Base on Radio Configuration of Cell.
BR//
f1cy
Is an excel file???....
BR
Nhato
sammy
2010-05-05, 03:45 PM
Thank, that is great
zee86
2010-07-21, 02:15 AM
Hi friends
Attached GPRS opt process
hoping it would be useful
Hi expert I need your help
In UK Vodafone is using ALU equipment can some one tell me which ALU transmission equipment they are using and which 3G BTS and RNC
Hi expert I need your help
In UK Vodafone is using ALU equipment can some one tell me which ALU transmission equipment they are using and which 3G BTS and RNC
AMU and ADMU, i think
zee86
2010-07-21, 06:27 PM
AMU and ADMU, i think
Bro you have doc for AMU and ADMU
plz share it i need these doc
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