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CE & CE & IuBIuB Capacity Dimensioning Capacity Dimensioning

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Contents

• CE Dimensioning• IuB Dimensioning• Example of CE & IuB Dimensioning Exercise• Recommended Node B Configuration• In Practice: Dimensioning based on HSDPA Subs

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CE Dimensioning

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CE Dimensioning

26161…3

RU106410…12RU10487…9

52324…6

FlexiUltrasite

(WSPC) ‏CE required for CCCH# cells/BTS

+ 1 CE per HSDPA user for signalling channels

80/cell64/cellCell Specific Scheduler

80 to support HSDPA in 3 cells

64 to support HSDPA in 3

cells

Shared Scheduler 10/15 codes

806415 codes

806410 codes

32325 codes

Channel Elements requiredUltrasite Flexi

HSDPA

• Common channel CE requirement

CE Dimensioning

• HSDPA CE requirement

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CE Dimensioning

880

16012821-2413210817-201128813-1680649-1256485-832321-4

FlexiUltrasite (WSPC) ‏CE required for HSUPA# HSUPA users

/BTS

R9944128kps 4464kbps2232kbps1116kbps / voice

1616384kbps88256kps

FlexiUltrasite (WSPC) ‏CE required for R99Bit rate

+ 1 CE per HSUPA user for signalling channels

• R99 CE Requirement

CE Dimensioning

• HSUPA CE requirement

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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 ExerciseWith 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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• SHO and CS Trunking Calculation

• Traffic Carried

CE & IuB Dimensioning (With FSMB)

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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 ExerciseWith Flexi WCDMA BTS (FSMC/FSMD/FSME)

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• 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

CE Dimensioning (With FSMC/FSMD/FSME)

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CE Dimensioning (With FSMC/FSMD/FSME)

• SHO and CS Trunking Calculation

• Traffic Carried

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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 RequirementsHSDPA 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

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Node B RequirementsHSDPA 3x7.2 Mbps (10 code w/o shared scheduler)

• 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% 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 HSDPA2 E1 for R991 E1 for HSDPA overbooking buffer

• CE Requirement

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Node B RequirementsHSDPA 3x14.4 Mbps (15 code w/o shared scheduler)

• 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% 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 HSDPA2 E1 for R992 E1 for HSDPA overbooking buffer

• CE Requirement