20130214_Small Cells.pdf

1 © Nokia Siemens Networks 2011

Solución Small Cells para cobertura y

capacidad


Small Cells to Adress Coverage and Capacity


Coverage Gaps / Traffic Hotspots

Need to improve coverage or add

capacity on traffic hot spots

Broadband coverage

Coverage gap or holes

GSM

covera

ge

Traffic hot spots

Broadband coverage

Planning and

Optimization

needed for layering


Small Cell for Capacity

• Micro-cell coverage depends on the

isolation from the macro-cell

• Place the micro cell as close as

possible to the centre of the traffic hot-

spot

• On average micro-cell will offload 20%

to 30% from the macro cell traffic

• To minimize Soft Handover overhead,

try to find the highest possible isolation

from the macro layer

• Micro cell can share the same

frequency with the overlapping macro

cell

Macrocell RSCP level

[dBm]

On street co-channel 3G

microcell radius [m]

-85 < 200 -75 100 -65 75 -55 < 50


The Flexi Multiradio BTS 3 main building blocks to a complete GSM/WCDMA/LTE Site

Flexi EDGE 18/36 TRX

System Module

Multimode System Module (WCDMA/LTE)

Flexi 3-Sector RF Module (GSM/WCDMA/LTE)

• 1 Gbps throughput

• Multiband support

• Multimode support

• Dedicated and concurrent mode SW defined

• High Capacity (18/36 TRX)

• Multiband support

• Optimized for GSM/EDGE

• Highest integration density level

• GSM/EDGE/WCDMA/HSPA/LTE defined by SW

• Dedicated and concurrent mode

• Single Band units: 850, 900, 1800, 1900

• 60W output per sector with Multi Carrier Power Amplifier (MCPA)

Flexi 3 sector RFM

(GSM/WCDMA/LTE)

Flexi EDGE 18/36 TRX

System Module

Multimode System Module (WCDMA/LTE)


• RX Diversity Sharing WCDMA-GSM (Phase 1)

• GSM and WCDMA use dedicated

RF modules

• One System Module per technology

• Share antenna system

• diversity between the 2 RFMs is shared using RX

Div output connector

• RF Sharing WCDMA-GSM (Phase 2)

• Shared RF module for GSM and WCDMA

• One System Module per technology

• Share antenna system

RF Sharing WCDMA - GSM

LNA

LNA

Du

ple

xer

RX

MCPA TX

RX main

RX div

RFM1

RXMC

GSM SM

WCDMA SM

X

RF Sharing

LNA

LNA

RX

MCPA

TX

RX main

RX div

RFM1

RXMC

LNA

LNA

RX

MCPA TX

RX main

RX div

RFM2

RXMC

X GSM SM

WCDMA SM

Du

ple

xer

Du

ple

xer

RX Diversity Sharing

RU20

GSM up to 6+6+6 TRX @ 10W

WCDMA 1+1+1 @ 40W

GSM up to 2+2+2 TRX @ 10W

WCDMA 1+1+1 @ 40W

RG10

RU30

RG10


Flexi Multiradio BTS: 2G + 3G BTS

Power (FPRA)

3G SM (FSME)

2G SM (ESMC)

RM 1900 (FXFA)

FPRA or FPMA

Fiber up to 200m

Fiber up to 10Km

Distributed Solution:

- Local Power Supply

- Singlemode Fiber

Feederless Solution:

- DC power from SM

- 50m, 100m or 200m

fiber

DC Cable

RM 1900 (FXFA)

Shared Antenna:

GSM 2+2+2 TRX @ 10W

WCDMA 1+1+1 @ 40W

RP3

Cable for

SM Sync

License needed for RF Sharing


Flexi Multiradio BTS: 3G + LTE BTS

Power (FPRA)

3G SM (FSME)

LTESM (FSME)

FPRA or FPMA

Fiber up to 200m

Fiber up to 10Km



- Singlemode Fiber


- DC power from SM

-50m, 100m or 200m

fiber

- Multimode Fiber

DC Cable

RM 1900 (FXFA)

Separated Antenna:

LTE 1+0+0 @ 20MHz MIMO

WCDMA 1+1+1 @ 40W

RP3

Cable for

SM Sync

SM FSME Supports up to 3 RM

RM 2600 (FRHA)

RM 1900 (FXFA)

RM 2600 (FRHA)


Flexi Multiradio BTS Remote RF Heads

2012

2013

2010 2011

GSM / WCDMA / LTE:

RRH 2TX/4RX

60W + 60W

850 (FHCD)** 4Q/13 HW

RU50/RL60

1900 (FHFA)** 4Q/13 HW

RU50/RL60

• Actual availability and Sw support depends on market needs and customer orders.

**) Sw release info under study

Planned HW availability

Planned SW release

2600 (FRHB)

3Q/11 (LTE RL30) available

2100 (FRGV)** 3Q/12 HW WCDMA/ LTE:

RRH 2TX/2RX

40W + 40W


Flexi Multiradio BTS: LTE BTS (Remote Radio Head)

Power (FPRA)

LTE SM (FSME)

AC/DC (FFAC)

For direct AC feeding

Fiber up to 200m

Fiber up to 15Km



- Singlemode Fiber


- DC power from SM

- 50m, 100m or 200m

fiber

- Multimode Fiber

DC Cable

LTE 1+0+0 @ 20MHz


RF Chaining

Efficient highway coverage and roof top solution

RFM RFM RFM RFM

SM

RF Chaining support with 3-Sector RF modules or RRHs

• Single and dual-band chaining

• Smooth site extension to dual-band

• e.g. 1900 MHz and 850 MHz

• Supports also MIMO, Dual-Cell HSPA and I-HSPA configurations

• Up to 12 RF modules or RRHs and per BTS

• Up to 12 carriers per BTS

• Up to 2 RF modules or RRHs per one chain

• Up to 6 carriers per chain

• Flexibility for building indoor coverage

850 MHz

1900 MHz

850 MHz

1900 MHz 850 MHz

1900 MHz

System Module

RU30 RG20 or

Max 10km

Max 10km


RF Chaining with RF Sharing GSM-WCDMA

Flexible GSM-WCDMA site building and upgrading

• RF Chaining with RF Sharing support for

3-Sector RF modules or RRHs

• One chain for RF-shared units

• Single-RAT chain can be added to both GSM

or WCDMA system module

• One chain can support up to 6 WCDMA carriers

together with GSM TRX – max 6 WCDMA(2+2+2) carriers +6 GSM carries(2+2+2) or

– max 3 WCDMA(1+1+1) carriers +18 GSM carries(6+6+6)

GSM system

module

900 MHz

GSM/WCDMA

900 MHz

GSM/WCDMA

900 MHz

GSM/WCDMA

WCDMA system

module

RFM RFM RFM

SM

SM

RU50 RG30 and


Power Backup System for Flexi Multiradio BTS

• Power System for Flexi Multiradio BTS

– New model, with a battery box to install battery.

– Up to 3 FRPA rectifier (2kW each).

– 3U Flexi case

685mm

450mm

650mm


Power System for Radio Modules

• Rectifiers power from 230VAC to 48VDC (FPAA)

• Battery Backup Li-Fe (FPBB)

• Usable for GSM/EDGE/LTE/WCDMA base stations

• Needs 3U Flexi Power case (FPMA)

• Compact stand alone 500W AC/DC power supply unit for RRH products

• Can be attached to all NSN 2TX RRHs

• Wide AC input range 90…276VAC with 55VDC output

• IP65

• Ambient temperature range -35…55C with sun load

• to the FPKA pole mounting kit underneath RRH


Flexi Multiradio Power Consumption

Power Consumption examples for various Power levels

Sys Module + Others RF Module 50% load RF Module 100% load

Total PW

consumption 50%

load [W]

Total PW

consumption 100%

load [W]

8W 3G BTS 1900 (FXFA+FSME) 248 344 382 592 630

8W 3G BTS 1900 (FXFA+2xFSME) 468 344 382 812 850

8W - chain 3G BTS 1900 (2xFXFA+FSME) 248 416 440 664 688

8W 3G BTS 1900 (3xFXFA+FSME) 248 622 660 870 908

8W 3G BTS 1900 (3xFXFA+2xFSME) 468 622 660 1090 1128

40W 3G BTS 1900 (3xFXFA+FSME) 248 771 909 1019 1157

40W 3G BTS 1900 (3xFXFA+2xFSME) 468 771 909 1239 1377

8W LTE BTS RRH (3xFRHB+FSME) 263 159 422

20130214_Small Cells.pdf

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