3G Interfaces RNC Dimensioning
Short Description
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Description
RNC & 3G Interfaces Dimensioning
Ramesh Babu Nokia Networks 3G&IP Network Planning - APAC
AGENDA
• D i m e n s i o n i n g o f 3 G In In t e r f a c es es & R N C • C o m m o n I s s u es es • E x a m p l e D i m e n s i o n i n g
AGENDA
• D i m e n s i o n i n g o f 3 G In In t e r f a c es es & R N C • C o m m o n I s s u es es • E x a m p l e D i m e n s i o n i n g
3G Network Architecture Architecture Other PLMN BG
PS Domain 3G-SGSN
Gn Um
Node B
Iub
Internet GGSN
RNC Iu
Iu
Node B
IP Backbone
Packet SS7 network Network
ATM
Iur
Gr Gd SMSC HLR
Iu
Iu
DNS DHCP RADIUS
Charging Center
CG NMS
Service & subscriber management
Packet network PSTN MSC/VLR CS Domain
GMSC
3G Interfaces in RAN 3G MSC and/or 3G SGSN
3G MSC and/or 3G SGSN RAN
Iu
Iur
RNC Iub BS BS BS
Iur
Iu
Iu RNC Iub
BS BS BS
Iur
Iu RNC
Iur
RNC
Iub
Iub
BS BS BS
BS BS BS
Uu User Equipment (UE)
• ATM is used as a transport solution in Radio Access Network (3GPP Rel.99) • ATM is standardised as transport bearer in Iub, Iur and Iu • ATM can be over PDH or SDH links
Required Inputs for Dimensioning • Radio Network Planning Output: • Number of Node Bs • Node B Configuration • Total number of Subscribers in each area • RF Planning assumptions (Blocking %, Soft Handover %,..) • Rollout Plan • Geographical Area Distribution or Regions • Different Type of Traffic Usage • Real-time traffic (Voice and Circuit Switched Data) • Non real-time traffic (All kind of packet data) • Number of active PDP contexts per subscriber • Simultaneous Data Subscribers during busy hour • Equipment Location
RAN & Core dimensioning Steps INTERFACES Iub_Voice
Iub_CS
Total_Iub
Iub_PS
Iu_CS
RNC
Iur
INPUTS
Iu_PS
Traffic
Hypothesis/Assumptions
3G-MSC Circuit Core Dimensioning MSS / GW
Packet Core Dimensioning
xGSN DNS, CG, ....
Interfaces – 3G PP Standards I u-cs
Nokia MSC ATM Module
Iub O&M on AAL5
Nokia UltraSite WDCMA BTS
AAL2 SIG on AAL5 AAL2 USER PLANE
Nokia RNC
Nokia 3G SGSN
I u-ps
Different OH for Different Traffic Classes Iub/Iur/Iu-CS Interface Overhead Each different service require different overhead Voice services
Activity Service bit rate Bit rate below ATM active silent active silent
kbps 12.2 0 12.2 0
12.76% 18.9 4.5 18.0 0.0
RT7.95 (AMR) UL
active silent
7.95 0
13.5 4.1
RT7.95 (AMR) DL
active silent
7.95 0
12.6 0.0
RT14.4 RT28.8 RT32 RT33.6 RT56.7 RT64
active active active active active active
14.4 28.8 32 33.6 56.7 64
18.7 36.3 39.9 41.7 69.8 78.7
64 128 256 320 384
85.7 166.9 329.3 410.4 491 6
RT12.2 (AMR) UL RT12.2 (AMR) DL
NRT64 NRT128 NRT256 NRT256 NRT384
TOTAL OH 73.00% 47.88%
23% 34%
28%
ATM Overhead in Iub Real Time Voice @ 12.2 kbps For Voice Activity Factor of 65% ((18.9 x 65%) + (4.5 x 35%)) – ((12.2 x 65%) + (0 x 35%)) -------------------------------------------------------------------------((12.2 x 65%) + (0 x 35%)) = 73.7 %
For Voice Activity Factor of 50% ((18.9 x 50%) + (4.5 x 50%)) – ((12.2 x 50%) + (0 x 50%)) -------------------------------------------------------------------------((12.2 x 50%) + (0 x 50%)) = 92 %
ATM Overhead in Iub Real Time CS Data 64 kbps (78.7 – 64) -------------64 = 23 %
Non Real Time PS Data 128 kbps (166.9 – 128) ----------------128 = 30 %
Iub Dimensioning BS RNC BS Iub RNC Iur BS
Iub
Iub
• Iub is the interface between Base Station and Radio Network Controller • Iub Traffic is the total of both Circuit Switched (Voice & data) and Packet Switched data
Iub dimensioning 1/4 (Voice ) Input :
Traffic ( mErl) / cell / region
@ B H
BSConfig / region
Method :
Traffic (Erl) / BS Using Erlang B Table
# TCh / BS Activity Factor SHO factor
50% 40%
# TCh (voice) / BS AMR rate 12.2 kbit/s
Bit rate (kbps) / BS ATM OH voice +73%
Output :
VoiceIub Bit rate (kbps) / BS
Iub dimensioning 2/4 (CS Data 64 kbps) Input :
Traffic ( mErl) / cell / region
@ B H
BSConfig / region
Method :
Traffic (Erl) / BS # TCh / BS Activity Factor SHO factor
100% 40%
# TCh (CS_data) / BS Line rate 64 kbps
Bit rate (kbps) / BS ATM OH 64k +23%
Output :
CSIub Bit rate (kbps) / BS
Iub dimensioning 3/4 (PS Data) Input : For each service
Method :
Traffic ( kbits) / cell / region
@ B H
BSConfig / region
Bit rate (kbps) / BS Activity Factor SHO factor ATM OH
100% 40% (64k +28%, 128k +25%, 384k +23%)
L1 adaptation rate 26.5%
Output :
PSIub Bit rate (kbps) / BS
Iub Throughput Calculation • Circuit Switched Traffic (RT) Voice AMR Data Rate - 12.2 Kbps
12.2 Kbps
Soft Handover - 40% 17.08 Kbps
ATM Overhead - 73% 29.54 Kbps
DTX - 50% 14.77 Kbps
Total Traffic = 14.77 X Physical Channels required
• Packet Switched Traffic (NRT) Data Bearer 128 Kbps X Kbps
Soft Handover - 40% X Kbps
L1 Data Rate – 26.5% X Kbps
ATM Overhead - 25% X Kbps
Total Traffic = No of Subscribers X Traffic
Iub Throughput Calculation
Circuit Switched Traffic (CS Voice and CS Data) = X Physical Channels required
Packet Switched Traffic = X Subscribers
Total Iub Traffic
= Circuit Switched Traffic + Packet Switched Traffic
10% Signalling Overhead in BSS
Iur Dimensioning RNC
RNC
Iur
Iub RNC Iur
• Iur interface is the traffic between two different RNCs. Eg for Soft Handover
Soft Handover
S
S
D
S
Base Station
S
Serving RNC
D
Drifting RNC
D
S
Soft Handover • Soft Handover is assumed to be 40 %
• Assumption 35% of the Mobiles are connected to two or more Base Stations at the same time. 30% of the Mobiles are in two way SHOs 5% of the Mobiles are in three way SHOs Consequently on average every Call occupies 65% x 1 + 30% x 2 + 5% x 3 = 1.4 Physical Channels If One RNC handles 100 Voice Calls, it needs 140 Physical Channels (100 x 1.4)
Iur Dimensioning MSC
SGSN
Iu
MSC
Iu Iur
RNC
Iur
RNC
RNC
Iub
Iub BS BS BS
Iu
BS BS
BS
Iub BS BS
BS
• Iur traffic mainly depends on the pattern of RNC to RNC handover traffic » Parameters involved - Velocity of the Mobile, RNC area etc. • Each RNC will be connected to the adjacent RNC directly. directly. One RNC could be connected to many different RNCs. • Studies inside Nokia shows that Iur is about 7 – 7 – 8 8 % of Iub (user plane traffic). For dimensioning Nokia adopts 7.5 %.
Example RNC Iur Interface Connection
RNC4 RNC5
RNC3 RNC1 RNC2
RNC Region 2 RNC Region 1
Example RNC Iur Interface Connection Real Case Example
RNC4 RNC5
RNC3 RNC1 RNC2
RNC Region 2 RNC Region 1
SI NGAPORE
Why No Iur Connection between RNC2 – RNC4 RNC3 – RNC1
Iu Interface Dimensioning (1/3) SGSN
MGW
Iu interface
RNC • Iu interface is split in to two parts > Between RNC and MGW for Circuit Switched Traffic - Payload carried over AAL2 > Between RNC and SGSN for Packet Switched Traffic - Payload carried over AAL5
Protocol Stack (Iu CS / Iu PS) Iub
Uu
Iu
A
UE
E
IWU
E.g., Vocoder
RNC
RLC-U
E.g., law Vocoder PCM, UDI, Iu-CS UP etc.
RLC-U
Node B
MAC WCDMA L1
WCDMA L1
MAC
MSC
Iu-CS UP
FP
FP
AAL2
AAL2
AAL2
AAL2
ATM
ATM
ATM
PHY
PHY
PHY
law PCM, UDI, etc.
ATM
Link Layer
Link Layer
PHY
PHY
PHY
PSTN/ N-ISDN
PHY
Circuit Switched Services – Iu CS UE
Iub
Uu
Iu
E.g., IPv4, IPv6
RNC
Gn
GGSN E.g., IPv4, IPv6
3G-
PDCP
PDCP
GTP-U
GTP-U
GTP
GTP
RLC-U
RLC-U
UDP
UDP
UDP
UDP
IP
IP
Link Layer
Link Layer
PHY
PHY
MAC
WCDMA L1
Node B WCDMA L1
MAC
IP
IP
LLC/SNAP
LLC/SNAP
AAL2
AAL5
AAL5
ATM
ATM
ATM
ATM
PHY
PHY
PHY
PHY
FP
FP
AAL2
Packet Switched Services – Iu PS
PHY
Gi
Iu Interface Dimensioning (2/3) (Iu CS traffic) For each service (voice, CS 64 k, .. )
Input :
Method :
Traffic (Erl) / BS / region # BSs& Config/ region
@ B H
Total Traffic (Erl) / RNC area
ErlangB (GOS - 0.5%) # TCh/ RNC area Line rate (12,2; 64 k; …) Activity Factor for voice: 50% ATM OH (as in Iub) Signalling overhead1% + Output :
Bit rate (kbps) / clutter
Iu Interface Dimensioning (3/3) (Iu PS traffic) Input :
Traffic (kbits) / BS / region
@ B H
# BSs& Config/ region Method :
Bit rate (kbps) / clutter ATM, AAL5, IP, UDP, GTP OH 25% + Signalling overhead1% +
Output :
Bit rate (kbps) / region
For packet size Of 512 bytes
Iu-PS Calculation Example For Packet Switched traffic, OH varies with the length of the IP packet ATM
AAL5 Encap IP
8
20
UDP
8
GTP ….Data
12
(packet length
1. Packet length = 128 Bytes 2. AAL5 PDU = (128 + 8 Encap+20 IP+ 8 UDP+ 12 GTP ) = 176 bytes 3. AAL5 PDU + trailer = (176+8) = 184 4. AAL5 Padding = roundup(184/48) x 48 = 192 (11 bytes padding) 5. Including ATM headers = 192/48 x 53 = 212 Bytes Total OH required = 69% ((212-128)/128)
Iu-PS Overhead - Example (1/3) 128 bytes 8 bytes encapsulation
8 bytes UDP
128 bytes 20 bytes IP Header
176 bytes
184 bytes
12 bytes GTP
8 bytes Trailer Bits
Iu-PS Overhead - Example (2/3) 48 bytes
48 bytes
48 bytes
48 bytes
48 bytes
48 bytes
48 bytes
48 bytes
48 bytes
48 bytes
ATM Cells
48
48
48
40
184 bytes
8 bytes Padding
48 bytes
48 bytes
48 bytes
48 bytes
48 bytes
48 bytes
192 bytes
212 bytes
5 bytes ATM Overhead
Iu-PS Overhead - Example (3/3) 128 bytes
212 bytes
Increase from Original 128 bytes to 212 bytes Percentage of Increase -
(212 128 / 128) * 100 –
65 % of Overhead for a IP Packet size of 128 Bytes
Iu-PS relative OH = (Packet size)
Iu Throughput Calculation • Circuit Switched Traffic to MSC Voice AMR Data Rate - 12.2 Kbps
12.2 Kbps
ATM Overhead - 73% 23.54 Kbps
Signalling OH in MSC - 1% 23.78 Kbps
• Packet Switched Traffic to SGSN Data Bearer 128 Kbps X Kbps
IP, ATM Overhead - 65% X Kbps
Signalling OH in SGSN - 1% Kbps X
DTX - 50% 11.89 Kbps
Total Traffic = 11.89 X Physical Channels required
Total Traffic = No of Subscribers X Traffic
Radio Network Controller (RNC)
Based on Nokia ATM Platform
3G Network Architecture Other PLMN
BG
PS Domain 3G-SGSN
Gn Um
Node B
Internet
Backbone
Iub
GGSN
RNC Iu
Iu
Node B
IP
Packet SS7 network Network
ATM
Iur
Gr Gd SMSC HLR
Iu
Iu
DNS DHCP RADIUS
Charging Center
CG NMS
Service & subscriber management
Packet network PSTN MSC/VLR CS Domain
GMSC
RNC Role •
Mobility Management
•
Connection and Radio link Management
•
Ciphering and Integrity Checking
•
ATM and IP traffic management
•
Integrated Transmission Interfaces
Radio Network Controller (RNC) Rel.1 Release: 26-130 Mbit/s Dynamic Traffic Capacity
1
2 Release1 Phase 1
3 Config.
4
5
1 2 3 4 5
M a x . c a p ac i t y i n d i f f e r en t c o n f i g u r a t i o n s Iub traffic capacity Interfaces
Iub Mbit/s Node Bs Carriers 26 256 85 52 384 128 78 512 170 104 640 213 130 768 256
STM-1 4 4 4 4 4
E1 64 96 128 160 192
Radio Network Controller (RNC) Rel.2 Release: 48-196 Mbit/s Dynamic Traffic Capacity
1
2 Release 1 Phase 1.5
3
Config.
4
5
1 2 3 4 5
Max. capacity in different configu rations Iub traffic capacity Interfaces
Iub Mbit/s Node Bs Carriers 384 48 128 576 85 192 768 256 122 960 159 320 1152 196 384
STM-1 4*4 4*4 4*4 4*4 4*4
E1 6*16 8*16 10*16 12*16 14*16
RNC Area Planning GGSN SGSN
BS RNC BS
BS
MSC
RNC Region-2
ATM Module
BS RNC BS
BS RNC Region-1
RNC Dimensioning Key limiting factors in RNC Dimensioning •
Maximum Throughput
- Rel 1 130 Mbit/s - Rel 2 196 Mbit/s - Rel 3 400 Mbit/s •
Maximum number or carriers
- Rel 1 768 Carriers - Rel 2 1152 Carriers - Rel 3 2304 Carriers •
Maximum number of Node Bs
-
Rel 1 256 BTS Rel 2 384 BTS
- Rel 3 768 BTS
• depending on the case, one of the above limitations will apply
RNC Dimensioning Principle Summary Capacity Almost Independent of the Traffic Mix
Check the number of carriers per RNC
Check the number of NodeBs per RNC
RNC nominal traffic capacity
Carriers to be connected Carriers connectivity per RNC * Fillrate
BTS to be connected BTS connectivity capacity per RNC * Fillrate
Voice erlangs * 16kbit/s
CS-data erlangs * data rate
PS-data volume (busy hour)
* SHO overhead
* SHO overhead
* SHO overhead
Total user traffic in the area
RNC Dimensioning Dimensioning Crietria
• Total throughput against the maximum throughput capacity of RNC • Total Carriers against the maximum carrier capacity of RNC • Total Base Stations against the maximum Node B capacity of RNC • Fill rate of 90%
Final No of RNC - Maximum value attained by the above three Criteria
Co m m o n Is s u e s
Throughput Capacity of RNC
MGW Iu Iub
SGSN 196 Mbps
RNC throughput capacity expressed only in one direction and also represents only the Capacity of DMCU. O & M signalling is handled separately in OMU. Nokia RNC could support 196 Mbps on UL and also 196 Mbps on DL.
Other Vendors mention the RNC throughput as 392 Mbps (UL + DL)
Traffic split between Voice & Data Throughput capacity of Nokia RNC is 196 Mbps.
Voice Data
What is the Traffic split between Voice and Data ?
Combination of any percentage of Voice and Data
RNC upgrade from 196 – 400 Mbps
Upgrade Path
196 Mbps
400 Mbps
No Upgrade path and cost defined yet. 400 Mbps RNC is provided as new boxes for the additional traffic for Later phases.
Voice Channels - 16 kbps in RNC
MGW 12.2 or lesser Voice Channel at 12.2 kbps or lesser
Voice Channel at 16 kbps
Even lower bitrates requires as much processing capacity (user and control plane) Within RNC as a 16kbps channels. In the Transmission it is taken as original bit rates.
Iur carried over Iu Interface GGSN SGSN
BS RNC BS
BS
MSC
RNC Region-2
MGW BS RNC BS
BS RNC Region-1
RNC linked directly for Iur connection Iur Traffic is carried through Iu over to core and then to RNC
Interface Ports on RNC Total Traffic (Iub + Iu + Iur) must be considered to calculate the interface Requirement in RNC.
Daisy Chain Configuration 50 X 0.66 E1 50 Node B- DU
50 X 0.33 E1 80 X 0.88 E1 80 Node B- U 80 X 0.44 E1 50 Node B- DU 80 Node B- U
Interface Ports on RNC
50 X 0.33 E1 50 Node B- DU
Star Configuration
AXC
1 X STM1
1 X STM1
AXC
1 X STM1
50 X 0.33 E1
AXC AXC
80 X 0.44 E1
80 X 0.44 E1 80 Node B- U 50 Node B- DU 80 Node B- U
No of E1 Interface required at RNC = 260 Available E1 Interface at RNC
= 192
Introduce Multiplexing Equipment to Groom the Traffic
What is the Solution
RNC Dimensioning Criteria Nokia’s Dimensioning criteria for RNC • Throughput • Carriers • Node B Some Operators specify RNC to be dimensioned based on • Subscribers • Number of Soft Handovers • Number of Hard Handovers • UE Positioning Request • Cell broadcast message • Iub, Iu, Iur and O&M Traffic
ATM Overhead in RNC
ATM OH added at NIU
ATM OH stripped off at the Interface unit of RNC
RNC
Node B ATM Transmission Medium
ATM Overhead is considered only on the Transmission The ATM OH is stripped off at the NIU of RNC Hence traffic to RNC will not include ATM overhead.
D im en s i o n i n g E x er c i s e
Case Study
Objective • Dimension the Interfaces Iub, Iu & Iur • Determine the number of RNCs required • Understand the output format from an IP Planner
3G RAN Network Dimensioning for an Operator in Singapore
Case Study . . SU
U
.
. .
. DU
.
U
SU
. . . . . . .
SI NGAPORE
Singapore classified in to four different regions
Indoor considered to be with in Dense Urban
Dense Urban Urban Suburban Rural
Inputs from Operator Subscriber Information Subscribers
Phase 1
Dense Urban Urban Suburban Rural Total
Phase 2
17477 15421 1495 5607 40000
45567 49055 7674 32703 135000
Services to be offered Circuit Switched • Voice • CS Data • CS Data Packet Switched • PS Data • PS Data • PS Data • PS Data
12.2 kbps 14.4 kbps 64 kbps 16 64 128 384
kbps kbps kbps kbps
Phase 3 82478 109027 20811 72685 285000
Traffic for different Services kbps UL, PS 16 kbps/sub kbps/sub Dense Urban Urban Suburban Rural
Ph as e 1 P ha se 2 P ha se 3
kbps UL, PS 64 kbps/sub kbps/sub Dense Urban Urban Suburban Rural
Ph as e 1 P ha se 2 P ha se 3
kbps UL, PS 128 kbps/sub kbps/sub Dense Urban Urban Suburban Rural
Ph as e 1 P ha se 2 P ha se 3
kbps UL, PS 384 kbps/sub kbps/sub Dense Urban Urban Suburban Rural
Ph as e 1 P ha se 2 P ha se 3
CS
Voice 12 .2 mE/sub
0.1760 0.3911 0.1956 0.2347
0.0320 0.0712 0.0356 0.0427
0.1596 0.3547 0.1773 0.2128
0.0 0.0 0.0 0.0
Data 14.4 mE/sub
Data 64
0.5543 0.9239 0.5081 0.6467
0.0 0.0 0.0 0.0
0.1134 0.1513 0.0817 0.1210
1.6394 2.1859 1.3115 1.7487
0.0 0.0 0.0 0.0
32.0
56.0
Phase 1 Phase 2 Phase 3 4.0
CS
0.0608 0.1014 0.0557 0.0709
0.2778 0.3704 0.2223 0.2963
Pha se 1 Phas e 2 Phas e 3 27.0
CS
0.2372 0.3954 0.2175 0.2768
8.0
10.0
Phase 1 Phase 2 Phase 3
kbps DL, PS 16 kbps/sub kbps/sub Dense Urban Urban Suburban Rural
Pha se 1 Pha se 2 Pha se 3
kbps DL, PS 64 kbps/sub kbps/sub Dense Urban Urban Suburban Rural
Pha se 1 Pha se 2 Pha se 3
kbps DL, PS 128 kbps/sub kbps/sub Dense Urban Urban Suburban Rural
Pha se 1 Pha se 2 Pha se 3
kbps DL, PS 384 kbps/sub kbps/sub Dense Urban Urban Suburban Rural
Pha se 1 Pha se 2 Pha se 3
0.0176 0.0391 0.0196 0 .0235
0.1681 0.3735 0.1867 0 .2241
0.6185 1.3745 0.6873 0 .8247
0.0 0.0 0.0 0.0
0.0237 0.0395 0.0217 0.0277
0.2231 0.3718 0.2045 0.2603
0.0 2.0361 1.1199 1.4253
1.2217 0.0 0.0 0.0
0.0278 0.0370 0.0222 0.0296
0.3821 0.5095 0.3057 0.4076
0.0 0.0 0.0 3.1681
2.9701 3.9602 2.3761 0.0
Radio Planning Output Region Base Station Type Dense Urban UltraSite Optima Compact ROC UltraSite Optima Compact CEC
Phase 1 Phase 2 Phase 3 145 215 0 0 0 215
Urban
UltraSite Optima Compact CEC
302
604
900
Suburban
UltraSite Optima Compact CEC
131
221
429
Rural
MetroSite Node B
100
190
290
Other Radio Planning Parameters • Radio Blocking • Voice Activity Factor (DTX) • Soft Handover Factor • Voice AMR Data Rate
2% 67% 40% 12.2 kbps
Iub Calculation CS Voice Traffic Dense Urban Subs and BTS Sites BTS Configuration Number of Sites Total Number of Sites CS Voice No of Subs Total Subs / BS Total Erl / BS Phy CH Req. SHO Bit Rate (Kbps) DTX Bit Rate (Kbps)+ATM O_H
111 145 145
17,477 120.53 3.25 8 11.20 136.64 91.55 158.38
Phase 1 Urban Suburban
111 302 302
15,421 51.06 1.38 5 7.00 85.40 57.22 98.99
111 131 131
1,495 11.41 0.31 3 4.20 51.24 34.33 59.39
Rural
111 100 100
5,607 56.07 1.51 5 7.00 85.40 57.22 98.99
Voice Traffic of 27mErl multiplied Using Erlang B by the Adding Table subs. with SHO factor Multiplied Blocking of 40% by AMR probability data into rate of 2% of Taking 12.2 kbps account only 67% ADD ATM OH for ofVoice traffic73% due to DTX.
Iub Calculation CS Data Traffic
Dense Urban CS Data @ 14.4 kbps Simultaneous Subscribers Subscribers per BS Total Erl / BS Phy CH Req SHO Bit Rate (Kbps) Bit Rate (Kbps)+ATM O_H
Total CS Voice Total CS Data Total CS Traffic + Sig.OH
7119 49.10 0.20 2 2.80 40.32 49.59
158.38 49.59 210.05
Phase 1 Urban Suburban
Rural
13959 46.22 0.18 2 2.80 40.32 49.59
3046 30.46 0.12 2 2.80 40.32 49.59
98.99 49.59 150.07
677 5.17 0.02 2 2.80 40.32 49.59
59.39 49.59 110.08
98.99 49.59 150.07
CS Data of 4mErl multiplied by the Using Erlang B subs. Table with Adding SHO Blocking factor ofby 40% Multiplied data probability of 2% rate of 144OH kbps ADD ATM for CS Data 25%
Voice + CS Data + 1% Sig OH in MSC
Iub Calculation PS Data Traffic (16 kbps)
PS Data 16 Kbps Simultaneous Subscribers Subscribers per BTS site Data Rate Kbps L1 Data Rate Kbps SHO Bit Rate (Kbps) + O_H
17477 120.53 21.21 28.28 39.60 62.56
15421 51.06 19.97 26.63 37.28 58.90
1495 11.41 2.23 2.98 4.17 6.58
5607 56.07 13.16 17.55 24.56 38.81
Total CS Traffic + Sig.OH
210.05
150.07
110.08
150.07
PS 16 kbps data traffic. Max UL 26.5% OHoffor or DL retransmission Adding SHO & buffering factor of OH 40%for ADD ATM PS Data 16 kbps 58%
Iub Calculation PS Data Traffic (64 kbps) PS Data 64 kbps Simultaneous Subscribers Subscribers per BTS site Data Rate Kbps L1 Data Rate Kbps SHO Bit Rate (Kbps) + O_H
17477 120.53 20.26 27.01 37.82 50.30
15421 51.06 19.07 25.43 35.60 47.35
1495 11.41 2.13 2.84 3.98 5.29
5607 56.07 12.57 16.75 23.46 31.20
Total CS Traffic + Sig.OH Total PS Data 16 kbps
210.05 62.56
150.07 58.90
110.08 6.58
150.07 38.81
PS 64 kbps data traffic. 33%Max OH of forUL or DL retransmission Adding SHO & buffering factor of 40%for ADD ATM OH PS Data 64 kbps 33%
Iub Calculation PS Data Traffic (128 kbps)
PS Data 128 kbps Simultaneous Subscribers Subscribers per BTS site Data Rate Kbps L1 Data Rate Kbps SHO Bit Rate (Kbps) + O_H
17477 120.53 74.55 99.40 139.15 180.90
15421 51.06 70.19 93.58 131.01 170.32
1495 11.41 7.84 10.46 14.64 19.03
5607 56.07 46.24 61.66 86.32 112.22
Total CS Traffic + Sig.OH Total PS Data 16 kbps Total PS Data 64 kbps
210.05 62.56 50.30
150.07 58.90 47.35
110.08 6.58 5.29
150.07 38.81 31.20
PS 128 kbps data traffic. 33%Max OH of forUL or DL retransmission Adding SHO & buffering factor of OH 40%for ADD ATM PS Data 64 kbps 30%
Iub Calculation Total CS Traffic + Sig.OH Total PS Data 16 kbps Total PS Data 64 kbps Total PS Data 128 kbps Total Traffic Per BS kbps
210.05 62.56 50.30 180.90 503.82
150.07 58.90 47.35 170.32 426.63
110.08 6.58 5.29 19.03 140.98
150.07 38.81 31.20 112.22 332.29
Total CS + PS
Total Iub + 10% Signalling OH BS Traffic + Sig OH in Mbps
0.55 Mbps
0.55
0.47
RNC 0.47 Mbps
DU
0.16
U
0.37
0.37 Mbps 0.16 Mbps
SU
Rural
Iu Calculation Iu CS Voice
CS Voice No of Subscribers Total V_Erl (Erl) CSV_CH Total Voice in kbps Total traffic + O_H Mbps
17477 471.88 508 6197.6 10.72
15421 416.37 451 5502.2 9.52
1495 40.37 56 683.2 1.18
Note : No Soft Handover in Iu interface.
5607 151.39 176 2147.2 3.71
Total Voice Traffic irrespective of No Using Erlang B ofMultiplied BS as in Iub Table with by Blocking of AMR dataprob ratefor of ADD ATM OH 0.5% 12.2 kbps Voice 73%
Iu Calculation Iu CS Data CS Data @ 14.4 Kbps Subscribers Total V_Erl (Erl) CSD_CH Total CS Data in kbps Total CS Data + O_H Mbps
7119 28.48 42.00 604.80 0.74
13959 55.84 73.00 1051.20 1.29
677 2.71 8.00 115.20 0.14
3046 12.18 22.00 316.80 0.39
Total CS Data Traffic Using Erlang B irrespective of Table with Multiplied byNo of BS as in Iub Blocking of AMR dataprob rate of ADD ATM OH for 0.5% 12.2 kbps Voice 23%
Total Iu CS Traffic Total Iu CS Voice Total Iu CS Data RNC ---> MSC Mbps
10.72 0.74 8.01
9.52 1.29 7.75
1.18 0.14 0.94
3.71 0.39 2.91
Total Iu CS Traffic for Singapore for Phase 1 = 19.61 Mbps
Voice with DTX + CS Data & 1& Sig in MSC
Iu Calculation Iu PS Data
Iu PS Traffic RNC to SGSN Traffic PD Traffic + O_H Mbps Traffic to SGSN + Sig OH
16.82 18.67 18.86
14.84 16.48 16.64
1.44 1.60 1.61
5.40 5.99 6.05
Total Iu PS Traffic for Singapore for Phase 1 = 43.16 Mbps
Iu CS 19.61 Mbps
MGW
RNC
Iu PS 43.61 Mbps
SGSN
Total PS Data of all Add services. Max IP/ATM of UL/DL Traffic OH1% based Add on PacketOH sizein Signalling SGSN
RNC Dimensioning Projected Time Schedule
Phases Phase 1 Phase 2 Phase 3
Roll Out 2H 2002 2H 2003 2H 2004
What Release of RNC to be proposed ?
RNC 196 Mbps 196 Mbps 400 Mbps
RNC Dimensioning Area
Total BS Total Iub traffic BS Type #Sites (BS) per site to RNC (Mbps) Mbps
Phase 1 DU U SU Rural
111 ROC 111 111 111
145 302 131 100 678
0.6 0.5 0.2 0.4
63.23 107.58 17.07 28.67
Phase 2 DU U SU Rural
111 CEC 111 111 111
215 604 221 195 1235
1.7 0.9 0.3 1.3
270.16 387.93 55.75 183.57
Phase 3 DU U SU Rural
111 111 111 111
215 900 429 310 1854
Fill Rate of 80% Used
1
6.4 2.8 0.9 3.2
55
1,005.36 1,863.35 295.42 729.50
Total RNC Traffic (Mbps)
Total Carriers
# RNC Limited Carriers
# RNC #RNC Limited Limited by Required # of RNC Processing NodeB Note: ROC BS Total Traffic Capacity
RNC 2 T otal
Type for DU without ATM which is only 1 Overhead Carrier
Config on Last RNC
Full
216.5
1,744
1.89
1.38
2.21
2.21
2
1
0
3
897.4
3,705
4.02
5.72
4.02
5.72
5
4
0
6
3893.6
5,562
5
4
10
16
Addl Traffic 2982.4
1
Addl Traffic after deducting the capacity of RNC in Phase2 9.32
1
9.32
1
5
4
4
4
4
3
3
3
3
2
2
2
22
RNC 1
X 5X 5
3 Config PhasePhase 1 Configuration Phase 2 Configuration
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