GPRS and EDGE Dimensioning Vinaphone
Transcript of GPRS and EDGE Dimensioning Vinaphone
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Abis
Site Config 02/02/02 6 radios
PDCH 4 per cell
Sdcch 1 TS per sector
Total SDCCH 3 TS
BCCH 3 TS
Bonus TS 3+3 =6 TS
Number of required extra Abis nibbles = Number of required extra & bonus Abis nibbles – Nb of bonus
=(4*4.49*3)-(6) -(12)
=54-6-12 Abis Nibbles
=36 Abis Nibbles
=9 Extra Abis TS
TS0 1 TS
RSL/OML 2 TS ( 7x 16k)
Basic Abis TS =2 Abis TS (per TRX) * 2 *3 ( cells)=12 TS
TOTAL 1+2+12+9 =24 Abis TS ( One Abis link enough ---32 TS)
Site Config 03/03/03 9 radios
PDCH 4 per cell
Sdcch 2 TS per sector
Total SDCCH 6 TS
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BCCH 3 TS
Bonus TS 9 TS
Number of required extra Abis nibbles = Number of required extra & bonus Abis nibbles – Nb of bonus
=(4*4.49*3)-(9) -(12)
=54-9-12 Abis Nibbles
=33 Abis Nibbles
=9 Extra Abis TS
TS0 1 TS
RSL/OML =9+1=10 x 16k= 3 TS
Basic Abis TS =2 Abis TS (per TRX) * 3 *3 ( cells)
=18 TS
TOTAL 1+3+18+9 =31 Abis TS ( One Abis link enough ---32 TS)
Site Config 04/04/04 12 radios
PDCH 4 per cell
Sdcch 3 TS per sector Total SDCCH 9 TS
BCCH 3 TS
Bonus TS 12 TS
Number of required extra Abis nibbles = Number of required extra & bonus Abis nibbles – Nb of bonus
=(4*3.49*3)-(12) -(12)
=54-12-12 Abis Nibbles
=30 Abis Nibbles
=8 Extra Abis TS
TS0 1 TS
RSL/OML =(12+1)/4 =4 TS (one 16k RSL one TRE)
Basic Abis TS =2 Abis TS (per TRX) * 3 *4( cells)
=24 TS
TOTAL 1+4+24+8 =37 Abis TS ( Two Abis link)
Site Config 04/03/03 10 radios
PDCH 4 per cell
Sdcch 2 TS per sector
Total SDCCH 3+2+2=7 TS
BCCH 3 TS
Bonus TS 10 TS
Number of required extra Abis nibbles = Number of required extra & bonus Abis nibbles – Nb of bonus
=(4*4.49*3)-(10) -(12)=54-10-12 Abis Nibbles
=32 Abis Nibbles
=8 Extra Abis TS
TS0 1 TS
RSL/OML =(10+1)/4 =3 TS (one 16k RSL one TRE)
Basic Abis TS =2 Abis TS (per TRX) * 10
=20 TS
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TOTAL 1+3+20+8 =32 Abis TS ( One Abis link)
Site Config 04/04/04 12 radios
PDCH 4 per cell
Sdcch 3 TS per sector
Total SDCCH 9 TSBCCH 3 TS
Bonus TS 12 TS
Only Support end-to-end = MCS6
Number of required extra Abis nibbles = Number of required extra & bonus Abis nibbles – Nb of bonus
=(4*2.36*3)-(12) -(12)
=29-12-12 Abis Nibbles
=5 Abis Nibbles
=2 Extra Abis TS
TS0 1 TS
RSL/OML =(12+1)/4 =4 TS (one 16k RSL one TRE)
Basic Abis TS =2 Abis TS (per TRX) * 3 *4( cells)=24 TS
TOTAL 1+4+24+2 =31 Abis TS ( One Abis link) With one a
Summary
Site Config Radios Abis Link MCS Planned
01/01/01 3 1 9
02/02/02 6 1 9
03/02/02 7 1 9
03/03/03 9 1 9
04/03/03 10 2 9
04/04/03 11 2 9
04/04/04 12 2 9
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NTRX Per OML RSL Abis TS (64k)
Abis nibbles - Basic Abis nibbles 1 1 1 1
2 1 2 1
3 1 3 1
4 1 4 2
5 1 5 2
6 1 6 2
7 1 7 2
8 1 8 3
9 1 9 310 1 10 3
11 1 11 3
12 1 12 4
13 1 13 4
14 1 14 4
15 1 15 4
16 1 16 5
17 1 17 5
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18 1 18 5
Abis nibbles - Basic Abis nibbles
42
Abis nibbles - Basic Abis nibbles
Abis nibbles - Basic Abis nibbles
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Abis nibbles - Basic Abis nibbles
is, 4/4/4 can only support end to end up to MCS 6
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Number of PDCH=18
We need to minus 18
Exemple : BTS ty
Cell 1 : 1 BCCH +Cell 2 : 1 BCCH +
Dimensionnement18 PDCH x 4,49
81 nibbles – 18 Ba
63 nibbles – 6 nib57 / 4 = 14,25 = 1
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nd 6 because already consider this when calculating Basic Abis which is count per TRX
e 2 x 3
2 SDCCH ; MAX_PDCH = 8 ; MCS-92 SDCCH ; MAX_PDCH = 10 ; MCS-9
paquet :81 nibble ABIS (Basic + Extra)
sic nibbles = 63 nibbles
le (Bonus) = 57 nibblesEXTS
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GCH/AterMUX-PS Dimensioning
Target: To estimate the number of AterMUX-PS links needed per GPU/GP, accor
Number of AterMUX-PS links per BSC = Number of required GCH per BSC / 112
Number of AterMUX-PS links per GPU/GP (based on user traffic) = Number of At
Finally,
Number of AterMUX-PS links per GPU/GP (on signaling + user traffic) =
Max (Number of required GSL per GPU/GP, Number of AterMUX-PS links per GP
GREEN FIELD
For Vinaphone Green Field GPRS/EDGE Launch
One GPU card per BSC
MCS=MCS9
4 PDCH per cells
One GPU A9135= max 108 PDCH (for MCS9)
Number of AterMUX-PS links per BSC = Number of required GCH per BSC / 112 GCH
=(108*4.49)/112
= 5 Atermux
5 extra Atermux required to secure MCS9 for 108 cells
FOR NON GREEN FIELD
Number of required GCH = Erlang C (Required GCH traffic, pGPU/GP)
pGPU/GP = 99.9%(Get number rof channel from Erlang C)
Required GCH traffic = Measured GCH traffic / 1 – Min (%GCH congestion, 30%)
Measured GCH traffic = P100c / 3600
%GCH congestion = Max {Ater congestion, GPU limitation} = Max { %Ater_cong,
Where :
%GCH_Ater_cong = P383a * 100 / 3600
%GCH_DSP_cong = P384 *100 / 3600
%DSP_load = Max(P201, P202) *100 / 3600
%CPU_overload = P402 *100 / 3600
Summary
For Vinaphone case, extra 2 Atermux for every BSC
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ing to user traffic.
CH
rMUX-PS links per BSC / Number of required GPU/GP per BSC
/GP based on user traffic, 2)
4 TS reserved TS0=signalling frame synchronization, 1 for N7=TS16, Alarm octet=TS15 and 1 for GS
DSP_Cong, %DSP_load, %CPU_overload}
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=TS 28
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Measured Object: Gb
Gathering periods: 7-day Busy Hour data, recommended
Input:
Require Gb traffic = Measure Gb traffic + 15%Margin
Measure Gb traffic = Max(P45, P46) / 28800*
*Note : 1 Erlang = [Gb TS speed (64Kbits/s) * 3600] / 8 =28800 K bytes.
pGb = 99.9%
Output:
Number of required Gb TS per link = Erlang C (Required_Gb_traffic, pG
Notes:
- - Minimum 2 Gb links are required for one GPU/GP due to securit
- - Maximum 31 Gb TS (TS no. 1 to 31) can be configured per one
- cannot be used as it is reserved for specific usages e.g. frame sy
- - In general, around 4 to 8 Gb TS are configured per one Gb link.
Summary
For Vinaphone 1 Gb link for each BSC
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)
y reason
Gb link. TS0
chronization.
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Counters:
Measured Object: LAPD
Gathering periods: 7-day Busy Hour data, recommendedMethodology:
Measure GSL Traffic = Max (p41,p42) / 28800*
*Note: 1 Erlang = [Gb TS speed (64Kbits/s) * 3600] / 8 =28800 K bytes.
GSL Capacity = depend on how many GSL
GSL load = Measure GSL Traffic / GSL Capacity
GSL load on a given GPU/GP should not exceed 80% , At least two GSLs are recom
Summary
For Vinaphone 2 GSL link for each BSC
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ended to be defined per GPU/GP due to security reason.
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