gprs and edge dimensioning vinaphone

7/28/2019 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)


PDCH 4 per cell


Total SDCCH 6 TS



BCCH 3 TS

Bonus TS 9 TS


=(4*4.49*3)-(9) -(12)


=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)


PDCH 4 per cell

Sdcch 3 TS per sector Total SDCCH 9 TS

BCCH 3 TS

Bonus TS 12 TS


=(4*3.49*3)-(12) -(12)


=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)


PDCH 4 per cell


Total SDCCH 3+2+2=7 TS

BCCH 3 TS

Bonus TS 10 TS


=(4*4.49*3)-(10) -(12)=54-10-12 Abis Nibbles

=32 Abis Nibbles

=8 Extra Abis TS

TS0 1 TS


Basic Abis TS =2 Abis TS (per TRX) * 10

=20 TS



TOTAL 1+3+20+8 =32 Abis TS ( One Abis link)


PDCH 4 per cell


Total SDCCH 9 TSBCCH 3 TS

Bonus TS 12 TS

Only Support end-to-end = MCS6


=(4*2.36*3)-(12) -(12)


=5 Abis Nibbles

=2 Extra Abis TS

TS0 1 TS


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



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



18 1 18 5

Abis nibbles - Basic Abis nibbles

42






is, 4/4/4 can only support end to end up to MCS 6



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



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



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



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}



=TS 28



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



)

y reason

Gb link. TS0

chronization.



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



ended to be defined per GPU/GP due to security reason.

gprs and edge dimensioning vinaphone

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