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2nd Carrier New Strategies

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Strategy I: Cell Barred with 1 HSDPA Layer (Light HSDPA Traffic)

Idle Mode Strategy

Default Settings will be applied for Idle Mode Parameter both F1 and F2.

AMR+R99

HSDPA+R99 F2: Cell Barred (Not allow to be camped in Idle Mode)

F1: Default Setting for Idle Mode

Mobile camps on F1 only in idle mode.

Whenever the mobile starts making call, the mobile will be directed to the right layer using Enhance DRRC feature.

Related Features: 2nd Carrier Principle

AMR+R99

HSDPA+R99

GSM

HSDPA+R99

HSDPA+R99

HSDPA+R99

EDRRC HSPA Capability Based Handover

2nd Carrier Cluster

F2

F1

2G

HSPA Inter frequency Handover

HSLCC

Related Feature• Enhanced Directed RRC connection setup for HSDPA layer (EDRRC)• HSPA layering for UEs in common channels (HSLCC)• HSPA Capability Based Handover • HSPA Inter frequency Handover

Done during Call Setup

GSM GSM

AMR+R99 AMR+R99

Sector 1 Sector 3Sector 2

Neighbour Definition Strategy

F2: HSDPA+R99

F1: AMR+R99

GSM

HSDPA+R99

GSM

F2: ADJS and ADJI

F1: ADJS and ADJG

F3: ADJW and ADCEAlready Existed in the network. No Need to Modify

Need to be defined

Sector 1 Sector 3Sector 2

AMR+R99

Pros and Cons

• Pros:– Traffic Behavior is controllable.– HSDPA Codes Pre-emption is controllable.– Simple for Neighbour Definition. Just only define Adji and Adjs for F2.

(Neighbours of Existing Layer (F1 and GSM) do not need to do anything)– There will be no problem with existing ADJ having neighbour > 47.– Simple Parameter Setting for Idle Mode– Less CE Consumption

• Cons:– No IFSO from F1 to F2 for a PS call when handover needed. The PS call from

F1 will hand off to GSM layer instead. ( One Way ADJI defined between F1 and F2). This could cause 3G throughput downgraded to GPRS speed.

– Less HSDPA Capacity

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Strategy II: Random Access with equal service Layers (Modulate HSDPA Traffic)

Idle Mode Strategy

Default Settings will be applied for Idle Mode Parameter both F1 and F2.

AMR+R99+HS

AMR+R99+HS F2: Default Setting for Idle Mode

F1: Default Setting for Idle Mode

Mobile randomly camps on either F1 or F2 in idle mode.

Related Features: 2nd Carrier Principle

GSM

AMR+R99+HS

DRRC

HSPA Capability Based Handover

2nd Carrier Cluster

F2

F1

2G

Related Feature• Directed RRC connection setup Feature (DRRC)• HSPA Inter frequency Handover

Done during Call Setup

GSM GSM

AMR+R99+HS

AMR+R99+HS AMR+R99+HSAMR+R99+HS

AMR+R99+HS AMR+R99+HS

HSPA Inter frequency Handover

Sector 1 Sector 3Sector 2

Neighbour Definition Strategy

F2: HSDPA+R99

F1: AMR+R99

GSM

HSDPA+R99

GSM

F2: ADJS and ADJI

F1: ADJS and ADJG

F3: ADJW and ADCEAlready Existed in the network. No Need to Modify

Need to be defined

Sector 1 Sector 3Sector 2

AMR+R99

Pros and Cons

• Pros:– Better HSDPA Mobility in F1 – Simple Parameter Setting for Idle Mode– Double HSDPA Capacity (2 HSDPA in both F1 and F2)– Using less feature.– Reduce DRRC and HLCC signaling between F1 and F2 Layers

• Cons:– Unable to control the traffic behavior of all services. Most likely that all

traffic could be in F2 due to better RF condition.– HSDPA Codes are pre-emptioned (stolen) by AMR and PS R99 Calls. It

can make HSDPA Throughput low. – Consume more CE– Neighbour Definition is complicated. And there will be some problem

with existing ADJ having neighbour > 47.

12 © Nokia Siemens Networks

Strategy III: Cell Barred with 2 HSDPA Layers plus Load Sharing (Modulate-High HSDPA Traffic)

Idle Mode Strategy

Default Settings will be applied for Idle Mode Parameter both F1 and F2.

F2: Cell Barred (Not allow to be camped in Idle Mode)

F1: Default Setting for Idle Mode

Mobile camps on F1 only in idle mode.

Whenever the mobile starts making call, the mobile will be directed to the right layer using Enhance DRRC feature.

AMR+R99+HS

AMR+R99+HS

Related Features: 2nd Carrier Principle

GSM

HSDPA+R99

EDRRCHSPA Capability Based Handover

2nd Carrier Cluster

F2

F1

2G

HSPA Inter frequency Handover

HSLCC

Related Feature• Enhanced Directed RRC connection setup for HSDPA layer (EDRRC)• HSPA layering for UEs in common channels (HSLCC)• HSDPA load balancing • HSPA Capability Based Handover • HSPA Inter frequency Handover

Done during Call Setup

GSM GSM

Sector 1 Sector 3Sector 2

AMR+R99+HS

AMR+R99+HS AMR+R99+HSAMR+R99+HS

AMR+R99+HS AMR+R99+HS

Neighbour Definition Strategy

F2: HSDPA+R99

F1: AMR+R99

GSM

HSDPA+R99

GSM

F2: ADJS and ADJI

F1: ADJS and ADJG

F3: ADJW and ADCEAlready Existed in the network. No Need to Modify

Need to be defined

Sector 1 Sector 3Sector 2

AMR+R99

Pros and Cons

• Pros:– The traffic behaviors of all services are controllable– HSDPA Codes Pre-emption is controllable.– Double HSDPA Capacity (2 HSDPA in both F1 and F2)– Better HSDPA Mobility in F1 – Simple Parameter Setting for Idle Mode– Simple Neighbour Definition

• Cons:– Consume more CE– No IFSO from F1 to F2 for a PS call when handover needed. The PS

call from F1 will hand off to GSM layer instead. ( One Way ADJI defined between F1 and F2). This could cause 3G throughput downgraded to GPRS speed.

Expectation Result

Acceptance KPI Expectation

HSDPA Throughput Improve or No degradation

Average reported CQI Improve or No degradation

HSDPA Traffic in F2 Increase

AVE_HSPA_DL_POWER (M1002C238) Increase

FACH to DCH from Non-HSPA to HSPA Layer (M1002C512) Active (Increase)

RRC CONN SETUP COMPLETED AFTER DIRECTED (M1001C259) Active (Increase)

DCH ALLO FOR SIG LINK FROM NON-HSPA TO HSPA LAYER(M1002C509 ) Active (Increase)

HSDPA Accessibility Stable

HSDPA Retainability Stable

CSSR/ Drop Call of R99 Services No degradation

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Appendix: 2nd Carrier Related Features Documents

Microsoft PowerPoint Presentation

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End of Report