CE IuB Dimensioning

CE & IuB Capacity Dimensioning

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Contents • • • • •

CE Dimensioning IuB Iu B Di Dime mens nsio ioni ning ng Example Example of of CE & IuB Dimension Dimensioning ing Exercis Exercise e Recommended Recommended Node B Configuration In Practice: Dimensioning based on HSDPA Subs

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CE Dimensioning

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CE Dimensioning • Common channel CE requirement # cells/BTS 1…3 4…6 7…9 10…12

CE required for CCCH Ultrasite (WSPC)   Flexi 16 26 32 52 48 RU10 64 RU10

• HSDPA CE requirement HSDPA

Channel Elements required Ultrasite Flexi

5 codes

32

32

10 codes

64

80

15 codes

64

80

Shared Scheduler 10/15 codes

Cell Specific Scheduler

64 to support HSDPA in 3 cells 64/cell

80 to support HSDPA in 3 cells 80/cell

+ 1 CE per HSDPA user for signalling channels

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CE Dimensioning • R99 CE Requirement Bit rate

CE required for R99 Ultrasite (WSPC)   Flexi 16kbps / voice 1 1 32kbps 2 2 4 64kbps 4 4 128kps 4 256kps 8 8 384kbps 16 16

• HSUPA CE requirement # HSUPA users CE required for HSUPA Ultrasite (WSPC)   Flexi  /BTS 0 8 8 1-4 32 32 5-8 48 56 9-12 64 80 13-16 88 112 17-20 108 132 21-24 128 160

+ 1 CE per HSUPA user for signalling channels

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R99

Illustration of CE Usage • Configuration  –  Ultra Site Supreme Node B  –  3 cells  –  1x5code HSDPA  –  3 WSPC (192 CE) • 3 WSPCs in this case can accommodate simultaneously:  –  12 HSDPA users w 64 kbps UL  –  3 R99 PS 384DL/64UL users  –  5 R99 PS 128DL/64UL users  –  8 Video users  –  32 AMR users

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IuB Dimensioning

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IuB Dimensioning • IuB required size is determined by the following factors  –  Bandwidth allocation for control plane  –  Bandwidth reserved for HSDPA  –  Bandwidth for carrying R99 traffic

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IuB Bandwidth for various services • R99 IuB BW

• HSDPA IuB BW

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Example of IuB and CE Dimensioning Exercise With Flexi WCDMA BTS (FSMB)

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CE & IuB Dimensioning (With FSMB) • Assumptions  –  R99 traffic mix and HSDPA requirement is given  –  CS (video and voice) is assumed with GOS 5%  –  Node B type: Flexi WCDMA BTS (FSMB)  –  HSDPA QoS: 512 kbps/user  –  Soft Handover Overhead: 30%

• Node B & HSDPA Config

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CE & IuB Dimensioning (With FSMB) • Traffic Carried

• SHO and CS Trunking Calculation

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CE Dimensioning (With FSMB) • CE Calculation

• CE Required  –  DL: 118, UL: 116  –  CE required: 118

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IuB Dimensioning (With FSMB) • R99 Traffic to be carried in the IuB

• IuB Capacity Required

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Example of IuB and CE Dimensioning Exercise With Flexi WCDMA BTS (FSMC/FSMD/FSME)

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CE Dimensioning (With FSMC/FSMD/FSME) • Assumptions  –  R99 traffic mix and HSDPA requirement is given  –  CS (video and voice) is assumed with GOS 5%  –  Node B type: Flexi WCDMA BTS (FSMC/FSMD/FSME)  –  HSDPA QoS: 512 kbps/user  –  Soft Handover Overhead: 30%

• Node B & HSDPA Config

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CE Dimensioning (With FSMC/FSMD/FSME) • Traffic Carried

• SHO and CS Trunking Calculation

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CE Dimensioning (With FSMC/FSMD/FSME) • CE Calculation

• CE Required  –  DL: 92, UL: 90  –  CE required: 92

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IuB Dimensioning (With FSMC/FSMD/FSME) • R99 Traffic to be carried in the IuB

• IuB Capacity Required

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Dimensioning Based on HSDPA Subs

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HSDPA Driven Capacity Dimensioning • Factor considered  –  HSDPA Bandwidth (1x3.6, 3x3.6, 3x7.2, 3x14.4)  –  User predefined QoS (512 kbps/user, 256 kbps/user, 128 kbps/ser)  –  Contention Ratio  –  # Subs to be supported

• Example for 512 kbps /user QoS

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Node B CE & IuB Configuration Examples

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Node B Requirements HSDPA 1x7.2 Mbps (10 code w shared scheduler) • CE Requirement

• IuB Requirement  –  HSDPA ATM level throughput max 8,350 kbps ~ 5 E1(7% control plane)  –  IuB requirement for HSDPA only traffic w/o R99 = 5 E1  –  Recommended IuB size = 7 E1  5 E1 for HSDPA  2 E1 for R99 Soc Classification level 23 © Nokia Siemens Networks

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Node B Requirements HSDPA 3x7.2 Mbps (10 code w/o shared scheduler) • CE Requirement

• IuB Requirement  –  HSDPA ATM level throughput max 3x8,350 kbps = 25,050 kbps (6% control plane)  –  From HSDPA counters, ratio of WBTS level throughput to sum cell throughput (HSDPA overbooking) is 48% Î 48%*25,050 = 12,024 kbps ~ 7 E1  –  IuB requirement for HSDPA only traffic w/o R99 = 7 E1  –  Recommended IuB size = 10 E1   

7 E1 for HSDPA 2 E1 for R99 1 E1 for HSDPA overbooking buffer

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Node B Requirements HSDPA 3x14.4 Mbps (15 code w/o shared scheduler) • CE Requirement

• IuB Requirement  –  HSDPA ATM level throughput max 3x16,700 kbps = 50,100 kbps (6% control plane)  –  From HSDPA counters, ratio of WBTS level throughput to sum cell throughput (HSDPA overbooking) is 48% Î 48%*50,100 = 24,048 kbps ~ 14 E1  –  IuB requirement for HSDPA only traffic w/o R99 = 14 E1  –  Recommended IuB size = 18 E1   

14 E1 for HSDPA 2 E1 for R99 2 E1 for HSDPA overbooking buffer

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