2G Flexi BTS Information Slides

1 © 2005 Nokia Flexi EDGE BTS / 26.04.2006/ DDi

Company Confidential

2G FLEXI BTS

2 © 2005 Nokia Flexi EDGE BTS 12.04.2006/ DDi

Customer Confidential

1. Simple and cost-effective site build-outs• Expansion to high capacity within the same footprint

• Reduced site costs: lower rents, new flexibility in site selection

• Faster site commissioning: minimized number of BTS building blocks, easy start-up configurations

• Fewer sites: wide range of coverage features with maximized RF performance

2. Single platform for flexible multimode sites• Same modules for all site types

• Common platform for GSM/EDGE/WCDMA/HSPA and other radio variants: lower site operating costs

Main Features for new GSM/EDGE BTS platform



Small but efficient:1640 subscribers* served with a BTS that is just over 0.5 m high* @15 mErl, 2% blocking* (D) 422 mm for cabinet-installed modules

Small but efficient:1640 subscribers* served with a BTS that is just over 0.5 m high* @15 mErl, 2% blocking* (D) 422 mm for cabinet-installed modules

Example of 2+2+2TRX

configuration

H 538mm

D 422* - 560mm W 447mm

Nokia Flexi BTS platform:novel approach for GSM/EDGE/WCDMA BTS sites

• BTS configurations are built with weather-proof modules; capacity is expanded by adding modules

• Cost efficient (whole life cycle including product cost and operational costs)

• UltraSite level performance and functionality

• Backward compatibility (existing sites, Abis, BSC)

• Support for EDGE evolution Nokia is first to adopt this novel modular approach

• Same modules used for all site types

• Indoor and outdoor

• Micro- and macrocellular • Common Flexi platform brings the same modular

principle and design to GSM/EDGE and WCDMA/HSPA BTS sites

• Modules can be installed in Flexi optional cabinets or other 19” racks if required



Modular Flexi BTS Platform

No cabinet is needed for module-based BTS

• Modules are in weather-proof casings with IP55 protection, no BTS cabinet is needed

• The casings direct air-flows and allow removal of the modules from the stack

• Temperature tolerance: -40°C …+50°C; temporarily +55 °C

Modules can be installed in cabinets or 19” racks

• Modules have no back and front covers, or casings, when used in cabinets

Standard stand-alone module 3HU

H 133 mm

W 447 mm

D 422* - 560 mm

* (D) 422 mm for cabinet-installed modules

Standard module weight ~20 kg

Module is small and light, allowing one person to transport and install BTS without using lifting equipment

2TRX sector module



System Module• O&M, power distribution,

system bus

Main modules of Flexi EDGE BTS

Sector module • Logical module comprising

Dual TRX and Dual duplexer modules (1 Dual duplexer module for each sector)Dual TRX module

• 2 carrier unit• Either stand-alone or part of

Sector module

Dual duplexer module (optional)

• Duplexing & multicoupling, VSWR, Bias T

• Min 1/ sector; paired with Dual TRX module



Wideband combiner sub-module

• 2:1 combiner• Attached to DTRX; max 2/DTRX

Remote Tune Combiner module • 6:1 combiner, ETSI frequencies• Duplexing & multicoupling, VSWR, Bias

T

Power AC-DC sub-module• AC/DC converter: from 230V AC to 48V

DC • Max 3 per Power module; 1kW power

each

Power Battery sub-module• Minute-level batteries for max 2 min• Max 3 per Power module

Power module• Support frame for 4 power sub-modules:

AC/DC converters and minute-level batteries

• 3x1kW supply supports max 12 TRX (6 DTRX)

Power DC-DC module• DC/DC converter: from external 24V DC

to internal 48V DC• Max 2kW supply

Optional modules of Flexi EDGE BTS (1/2)



Optional modules and sub-modules (2/2)

Module casings

• 2HU and 3HU casings for module stacking, guiding airflows and IP55 protection

Mounting covers• Front and back covers for modules

System extension module• For over 12TRX and RTC configurations• Power distribution, system bus

Site support module• 7HU IP55 space for third party LTE or 19”

AC/DC converters in Flexi outdoor cabinets

Transmission sub-modules1. E1 AS sub-module 2. E1/T1 S sub-module3. Flexbus sub-module

Integrated long term battery backup (MIBBU)

• Indoor sites: MIBBU + separate battery give long-term battery back-up

• Outdoor sites: MIBBU in Site support module + separate battery

Cabinets: indoor and outdoor

• Optional cabinets where requiredHEX LTE

LTELTELTE

MIBBU

battFAN batt batt batt



EX_A EDGE dual TRX moduleT = 800 MHzG = 900 MHzD = 1800 MHzP = 1900 MHz

ER_A EDGE RF dual duplexer moduleT = 800 MHzG= 900 MHzJ = 900 MHz SB-JH= 900 MHz SB-HD = 1800 MHzP= 1900 MHz

ESMA EDGE System ModuleFI_A Flexi platform Interface sub-module

E = E1 AS sub-moduleP = E1/T1 S sub-moduleF = Flexbus sub-module

EC_A EDGE RTC (Cavity combiner) moduleG = 900 MHzJ = 900 MHz - JD = 1800 MHz

EW_A EDGE Wide band combiner sub-module

G = 800/900 MHzD = 1800 MHzP = 1900 MHz

EUCA EDGE Upgrade Cable kit

EM_A Flexi Module CasingsT = 2 HUH = 3 HU

ESEA EDGE System Extension module

MIBBU Integrated long term battery backup

Flexi BTS specific modules



Flexi EDGE BTS: simpler architecture with fewer units

• Smallest starting configuration with 2 modules: • Sector module, incl Dual TRX module and Dual duplexer module*

• System module

• All Flexi EDGE BTS modules are GSM and EDGE compliant

System module(transport)System module(transport)

3HU

Dual TRX module (2 carriers)Dual TRX module (2 carriers)

Dual duplexer module (optional)Dual duplexer module (optional) 1H

U2HU

3HU

* 1 Dual duplexer module is required for each sector, it is not needed for further TRX expansions



Flexi EDGE: from small to large configurations

• Flexible capacity increase in a small volume: 1 to 24 TRX in 1-16 sectors under 1 BCF

• DTRX module comprises 2 carriers but single carrier TRX increments are supported with Software licensing

Minimum configuration

1-2TRX , 2 modules

Maximum configuration/BCF

8+8+8TRX, 14 modules



Stack 2+2+2

8+8+8 Indoor48V DC

4+4+4 Outdoor with Batteries

Sys module

Stack 2 TRX

Stack 4+4+4

Sect module Sect moduleSect module

Sect module

Examples of Flexi EDGE configurations

Sys module

Sect moduleSect module

Sect module

Sys module

Sect moduleSect module

Sect module

Sys module

DTRX

DTRX

DTRX

DTR

X

DTR

X

MIBBU

HEXLTE

LTE

LTE

LTE

FAN batt batt batt batt

Sys module

Sect module

Sect module

DTRX

DTRX

DTRX

DTRX

DTRX

DTRX

DTRX

DTRX

DTRX

Sect module

Sys ext module

Sys module

Sys ext module

DTRX (Dual TRX)

Sector module (DTRX + duplex filter)

GSM/EDGE Modules



Flexi EDGE BTS Architecture

SystemModule

ABIS

DIGITAL RF Ethernet

SynchronizationABIS

BB RF

DTRX

BB RF

DTRX

BB RF

DTRX

RF cabling

BB RF

DTRX

BB RF

DTRX

BB RF

DTRX

DDU

Digital I/O

DDU

DDU



Mechanical Architecture and installation options

System Module

Plinth, in floor installation

Roof with lock, in outdoor

TRX Module



Wall installation Pole installation Floor installation

Nokia Flexi Base StationTurn any location to a feasible BTS site

•Max 4+4+4 or

•Dualband 2+2+2

•Supported

•Only upto 2+2+2 feasible

•Max 4+4+4 or

•Dualband 2+2+2

Earthquake:

•Zone 4 with 4 modules;

•Zone 2 with 9 modules



Flexi BTS suites for all traditional sites

1) Rooftop Outdoor

2) Rooftop Indoor

5) Rural Outdoor

Mast

6) Rural Outdoor

Tower

4) Sub-Urban Outdoor

Pole

3) Rooftop Cabinet



Configuration examples



Examples of Module BTS configurations and comparison to Ultrasite

Stack 2+2+2 ->4+4+4 extension

Indoor EDGE4+4+4 &WCDMA 2+2+2

Sys box

Sys box

Sys module

Sys ext module

DTRX

CDTRX (DTRX + duplex filter)

8+8+848VDCindoor

Sys box

Sys ext box

Outdoor 4+4+4with Batteries

Sys box

HEX LTE

LTE

LTE

LTE

MIBBU

battFAN batt batt batt

GSM/EDGE Modules

WCDMA Modules

Sys module

RF module Sys box



Du

ple

xer

LNA

Du

ple

xer

LNA

Du

ple

xer

LNA+Multi-

coupler

Du

ple

xer

LNA+Multi-

coupler

Flexi EDGE BTS Combining By-pass, 2-way RX diversity

Dual Duplexer Antennas

DualTRXExample:2 TRX/cell

TX1

RX1 MainDiv

Div

RX2 MainDiv

TX22+2+2 (H*W*D):12HU x 19” x 400mm

Antenna connectors

+47 dBm2.5 dB loss *

+44.5 dBm



ULTRASITE Combining By-pass, 2-way RX diversity

Example: 2 TRX/cell

Tranceiver RF Units

Dual Duplex Unit

Receive Multicoupler

Unit



Flexi EDGE BTS 2-way Wideband Combining, 2-way RX diversity

Example: 4 TRX per CellWideband Combiners Antennas

Dual Duplexer

DualTRXs

Du

ple

xer

LNA

Du

plexer

LNA

Du

plexer

LNA+Multi-

coupler

Du

plexer

LNA+Multi-

coupler

WBC

WBCTX1

RX1 MainDiv

DivRX2 Main

DivTX2

TX3

RX3 MainDiv

DivRX4 Main

DivTX4

Antenna connectors

This picture is not correctPhase feedback is not needed

(is used only for DPTRXs)



ULTRASITE2-way Wideband Combining, 2-way RX diversity

Example: 4 TRX per Cell

Tranceiver RF Units

Dual Duplex Unit


Units

Wideband Combiner unit

Wideband Combiner unit



Flexi EDGE BTS 4+4+4 indoor 24VDC

Cables:Green: BusLight brown: PwrDark red: DDU-DTRXBlack: Antenna cablesRed small: RxBlue small: TxRed&blue thick: PSU in&out

Ultrasite4+4+4Two-Way WBC

Example: 4+4+4 configuration

Dual Duplexer

DTRX

System Module

PSU



Du

ple

xer LNA

Du

ple

xer

LNA

Du

ple

xer LNA+Multi-

coupler

Du

ple

xer

LNA+Multi-

coupler

Flexi EDGE BTS 4-way Wideband Combining, 2-way RX

diversity

Example:8 TRX/cell

WBCWBC

WBC

WBC

Wideband Combiners Dual Duplexer

AntennasDualTRXs

WBC

WBC

TX1RX1 Main

DivdivRX2

MainDiv

TX2

TX3RX3 Main

DivdivRX4

MainDiv

TX4

TX5RX5 Main

DivdivRX6

MainDiv

TX6

TX7RX7 Main

DivdivRX8

MainDiv

TX8



Ultrasite4-way Wideband Combining, 2-way RX

diversity


Units

Dual Duplex Unit

Wideband Combiner units

Tranceiver RF Units



Du

ple

xer

LNA

Du

ple

xer

LNA

Du

ple

xer

LNA+Multi-

coupler

Du

ple

xer

LNA+Multi-

coupler

Flexi EDGE BTS using DPTRX (TCC Combining),

2-way RX diversity

WBC

Wideband Combiner(coherent)

Dual Duplexer

Antennas& MHA DualTRX

WBCTX1

RX1 MainDiv

Div

RX2 MainDiv

TX2

+47 dBm

+49.5 dBm 0.8 dB loss *

+48.7 dBm

+47 dBm

Example: DPTRX 1 Carrier/Cell

Phase feedback

* The Nominal loss value is 0.8 dB. The guaranteed loss value is

2.5 dB



Flexi EDGE BTS example using DPTRXsto improve WBC loss compensation

2-way Wideband Combining, 2-way RX diversityExample:4 Carrier/cell

Wideband Combiner

Dual

Duplexer AntennasDualTRXs

TX1

RX1MainDiv

RX2 MainDiv

TX2

TX3

RX3MainDiv

RX4 MainDiv

TX4

+47 dBm2.5 dB loss *

+43.5 dBm

+40.5 dBm

WBC

WBC

Du

plexer

LNA

Du

plexer

LNA

LNA+Multi-

coupler

Du

plexer

Du

plexer

LNA+Multi-

coupler

Phase feedback

TX1

RX1MainDiv

RX2 MainDiv

TX2

TX3

RX3MainDiv

RX4 MainDiv

TX4

TX7

RX7MainDiv

RX8 MainDiv

TX8

TX5

RX5MainDiv

RX6 MainDiv

TX6

CWBC

CWBC

WBC

WBC

2.5 dB loss

+43.5 dBm

Du

plexer

LNA

Du

plexer

LNA

LNA+Multi-

coupler

Du

plexer

Du

plexer

LNA+Multi-

coupler

+47 dBm +49.5 dBm +46 dBm

Wideband Combiners

Dual

Duplexer AntennasDual Power TRXs

3.5 dB loss

3.5 dB loss

CoherentWideband Combiners

CWBC

CWBC



Nokia Flexi EDGE BTS RF performance is the best in industry

Flexi EDGE BTS: 0.2-0.5 dBm higher output power at TOCas RF cables are connected directly to DTRX units



With MHA Flexi EDGE BTS system sensitivity remains constant

UltraSite MHA compensates for feeder losses and makes the Flexi system sensitivity constant regardless of feeder loss

Antenna feeder loss

Flexi EDGE system sensitivity1800 2-Way Diversity

Without MHA

With MHA MHA improvement

dB dBm dBm dB

0 -115,5 -116,0-116,0 0,5

1 -114,5 -116,0-116,0 1,5

2 -113,5 -116,0-116,0 2,5

33 -112,5-112,5 -116,0-116,0 3,53,5

4 -111,5 -116,0-116,0 4,5

5 -110,5 -116,0-116,0 5,5

6 -109,5 -116,0-116,0 6,5

7 -108,5 -116,0-116,0 7,5

8 -107,5 -116,0-116,0 8,5

9 -106,5 -116,0-116,0 9,5

10 -105,5 -116,0-116,0 10,5



Compatibility

• EP1.0• S12

• OSS4.1

• EP1.1• S13

• OSS4.2

• EP2.0• S14

• OSS5.1



EP1.1 Features Candidates

• Ecell for CS calls

• DFCA

• Antenna Hopping

• 24TRX/BCF

• TCC with 2UD/4UD• Licenced by BSC feature

• EasyWizard for Flexi EDGE BTS

• ECell for data packet (GMSK only)

• Ecell for CS calls

• DFCA

• Antenna Hopping

• 24TRX/BCF

• TCC with 2UD/4UD• Licenced by BSC feature

• EasyWizard for Flexi EDGE BTS

• ECell for data packet (GMSK only)

Transport

• TruNet (Circuit Manager)

Transport

• TruNet (Circuit Manager)



EP2.0 Feature Candidates• IDD/4UD

• No licence needed

• Satellite Abis• CS supported but not AMR

• PS supported

• With consideration with future support also for AMR

• Mobile speed detection • Same specification as in CX

• Authentication & security• as defined in BSS 13 level specifications

• Re-assess port EM to SEM

• A5/3 Ciphering Support

• WB-AMR

• RTT improvements

• IDD/4UD• No licence needed

• Satellite Abis• CS supported but not AMR

• PS supported

• With consideration with future support also for AMR

• Mobile speed detection • Same specification as in CX

• Authentication & security• as defined in BSS 13 level specifications

• Re-assess port EM to SEM

• A5/3 Ciphering Support

• WB-AMR

• RTT improvements

Transport

• 16 kbit/s level XC between E1/T1 interfaces

• License Mgmt. (e-features)

• E1/T1 ports in blocks of 2

• PDH loop protection

• A-bis over IP (CES over Ethernet)

• IP DCN

Transport

• 16 kbit/s level XC between E1/T1 interfaces

• License Mgmt. (e-features)

• E1/T1 ports in blocks of 2

• PDH loop protection

• A-bis over IP (CES over Ethernet)

• IP DCN



Backup slides



Flexi EDGE Dual TRX Module (EXxA)

• Dual TRX Module (DTRX) is a two carrier TRX unit, used as: • a stand alone TRX module• or a Sector module with the Dual duplexer module (and optional wideband combiner)• or with RTC module• or in Coverage mode (as Double Power TRX (DPTRX) or for Intelligent Downlink Diversity)

• It consists of: • Baseband part that is common to both TRXs• RF part (2 independent transmit (TX) chains and 4 receive (RX) chains, incl 2 for diversity) • 1-2 optional Wideband combiner (WBC) sub-modules

• RX diversity options of the DTRX are:• 2-way diversity: 2 RX inputs/DTRX used when both TRXs are in same sector as DTRX unit

shares RX signals between TRXs. All 4 RX inputs/DTRX are used when TRXs are in different sectors

• 4-way diversity: All 4 RX inputs/DTRX used, only with SRC or with DPTRX• All DTRX external communication is handled through single Gigabit Ethernet

interface

2HU

4xRX TX2xWideband combiners1xBus

1xDTRX-DDU

1xPowerDPTRX

TX



Flexi EDGE Dual Duplexer Module (ERxA)

• Dual duplexer (DDU) module together with Dual TRX create a Sector module• Min one DDU per sector is needed; it must be attached to DTRX module

• The DDU provides duplex functionality to combine TX and RX signals in a common antenna feeder

• 2 antenna connections (for 1 or 2 sectors) for by-pass and combined configurations

• 2 TX inputs and 4+4 RX outputs (4 RX from antenna 1 and 4 RX from antenna 2)

• The DDU contains two duplex filters, two Low Noise Amplifiers (LNAs), two Bias-Ts with VSWR measurement functionality and common TRX loop for TRXs in one sector

• The TRX loop is controlled through the Sector module • All DTRXs in the sector have to request loop service from the Sector module

• Loop can be performed from either TX to any of 8 RX outputs

• Only one TX and one RX can be simultaneously connected (no looping with Diversity Combining)

• The LNAs have high and low gain states for supporting high gain MHAs1

HU8xRX TXTX RX for

external BTS

RX for external

BTS



Flexi EDGE Sector Module

• Sector module is a logical unit consisting of 2 building blocks:• Dual TRX (DTRX) module

• Dual duplexer module

• Minimum one sector module is needed per sector

• There is space for 1 or 2 optional Wideband combiner (WBC) sub-modules in the DTRX module

• For 4-way UL diversity 2 Sector modules are needed per sector

Dual TRX module

Dual duplexer module

1-2 Wideband combiners

3HU



ESMA (Flexi EDGE System Module A) 1/2O&M, power distribution, system bus

TRS submodule

• 8 * E1/T1 • 8 * E1• 2 * FB

Power Distribution Unit

8 TRX ports to connect Ethernet and synchronization signals to DTRX +1 port for connection to ESE



• 3HU Unit for BTS common functionalities and internal/external connections

• Supports up to 6 DTRX modules (up to 12TRX)

• 5 main functions of the module:• BTS O&M: SW downloading and storing x2, configuration management, reference

clock and alarms

• BTS integrated transport: Abis transmission

• Baseband switching: communication between modules via Ethernet switch

• BTS power distribution: single point for power intake, power distribution to all modules

• BTS internal and external synchronizationPDU (power distribution unit) 1x48V intake

Interchangeable Transport module:8xE1, 8xE1/T1 or 2x Flexbus

Aux equipment (Q1) 2xSISO, Local Man. Port

6x Ethernet 1xEAC (External Alarm & Control)12x alarm inputs+6x control outputs

PDU (power distribution unit) 6x48V to other modules

Flexi EDGE System Module (ESMA) 2/2without case



• 3HU Unit for BTS common functionalities and internal/external connections

• Supports up to 6 DTRX modules (1 to 12TRX)

• 5 main functions of the module:• BTS O&M: SW downloading and storing x2, configuration management, reference clock

and alarms

• BTS integrated transport: Abis transmission

• Baseband switching: communication between modules via Ethernet switch

• Power distribution to the BTS: single point for power intake, power distribution to modules

• BTS internal and external synchronization

3HU

Flexi EDGE System Module with Case



Flexi EDGE RTC Module (Cavity combiner) (ECxA)

• Optional RTC module for ETSI frequency bands supports max 6 TRX• One RTC per sector is needed; 2 RTCs can support up to 12 carriers/sector

• RTC provides the duplex functionality to combine up to 6 TX signals in a common antenna feeder

• RTC supports antenna sharing (co-siting) with another BTS

• RTC module consists of : tunable cavity combiner, LNAs for RX signal and duplex filter and RX filter for diversity signal, Bias-T, VSWR and MHA power feed

• RTC provides the TRX loop; DTRXs request the loop service• 4 HU RTC modules require cabinet installation• Functioning principle:

• RTC receives the main RX signal through the duplex filter from ANT1 and diversity signal through RX filter from ANT2

• RX outputs are split into two groups: one group is used for main RX and the other for diversity RX

• In 12 TRX sectors all 6 outputs come from one antenna: 1st RTC provides main RX outputs from its ANT1, 2nd RTC provides diverse RX outputs from its ANT1

4HU

6x TX

6x RX 1xExt RX in, 1xExt RX out



Flexi WCDMA BTS Architecture

System Module

Iu

DIGITAL RF Ethernet

SynchronizationIu

RF

BB RF

RF



Internal Interfaces Ethernet Architecture

• All traffic between System Module and TRX Module is handled over Gigabit Ethernet.

• This traffic contains:• Hopping BUS, former FBUS traffic• ABIS, former D1 BUS traffic• O&M, former D2 BUS traffic

• Hopping BUS traffic flow is purely between TRXs. The system module provides only Ethernet switch for this traffic, but does not otherwise see this data.

• ABIS traffic is transferred between ABIS and TRXs. The Network Processor in the System Module takes care of this message transfer.

• O&M data transfers go between BTS O&M SW in the Network Processor and the TRX O&M SW in the TRX.

BB RF

TRXSystem Module

ABIS

BB RF

TRX

Ethernet

PHY

Ethernet

SwItch

NetworkProcessor

ABIS

PHY

ABIS Traffic (Former D1-Bus)

Hopping Bus Traffic (Former F-Bus)

O&M Traffic (Former D2-Bus)

PHY = Physical Device



Power(Optional)Power(Optional)

Simpler Architecture with Low Unit Count

System Module(Transport)System Module(Transport)

RTC Module(Optional)RTC Module(Optional)

TRX Module(2 Carriers)TRX Module(2 Carriers)

PowerAC/DC24VDC

BASE BAND Processing

CONTROL DC Power48 V

BBU

Filtering, Duplexing

GSM/EDGE 800/900/1800/1900

E1/T1 Flexbus

Ethernet

WB DuplexingWB Duplexing

WidebandCombining

Filtering, Duplexing

A-Bis interfaces



Dual TRX ModuleBlock Diagram

48V

Oscillator

Circuitry

DSP 1

SDRAM

EMIFA

Ethernet

PHY

EMIFB BB ASIC

PSU

Sync

TX IF/RF

Clocks / Sync

TX DAC(s)

RX ADC(s)RX IF

I/O,Alarms

TX

48V

Supply Voltages

TX IF/RFTX DAC(s)

RX ADC(s) RX IF

FB ADC TX FB

I/O,Alarms

TX

TX FHS

RX FHS

28V PSU

TX FHS

RX FHS

28V PSU

TX PA

Div RX 1

Div RX 2 3dB

Main RX 1

Main RX 2 3dB

TX PA

WBC

TX 1out

TX 2out

DRX2

DRX1

MRX2

MRX1

Feedbackfor TCC

+48V

TCCADC(s)

TCC

DDUADC(s)

I2C

AbbreviationsADC Analog to Digital Converter DAC Digital to Analog Converter FB Feed BackFHS Frequency Hopping Synthesizer

PSU Power SupplyPHY Physical DeviceTCC TX Coherent CombiningWBC Wide Band Combiner



External Interfaces• Power Input

• 48 V Input

• Transmission Interfaces• 8 x E1/T1 symmetrical with RJ45• 8 x E1 coaxial with SMB • 2 x Flexbus with TNC

• External BTS, Site Support or Alarm/Control Interfaces• EAC, External Alarm and Control, 12 Inputs, 6 Outputs• SYNC In, Synchronization input interface (FCLK and FN)• SYNC Out, Synchronization output interface(FCLK and FN)• Q1, Site Support System Management• SS, Two Ethernet interfaces• LMP, Local Management Port

• Synchronization outputs for Test Equipment (In Sync connector)

• 13 MHz, BTS Reference Clock• FCLK, Frame Clock

• RF Interfaces• 2…12 Duplex antenna Interfaces



Internal Interfaces

• Ethernet / Synchronization Interface• Ethernet is used as main communication link between System Module and

DTRX Module. It is also used for BB hopping data transfers between DTRX modules.

• REF_CLK (6.5 MHz REF): The System Module Supplies reference clock for TRXs and RTC.

• FCLK/FN: The System Module Supplies Frame Clock and Frame Number to the TRX. These are multiplexed in a single line.

• DTRX – DDU Interface• DTRX Controls DDU through Digital Interface. This interface contains direct

digital control signals and I2C bus for memory access and slow controls.



Flexi BTS powering• All modules operate with 48VDC and have integrated

DC/DC converters for module internal voltages.• 48VDC may be supplied from:

• External BBU• MIBBU in FCSA or in FCIA• Optional AC/DC module with optional minute level BBU

provides the 48V DC input to the power distribution• Optional 24VDC/DC module

• 48V DC power distribution (PDU) is located in the System Module and in the System Extension Module

• The input for the System Module is nominal – 48VDC with positive earth

• The System Module has – 48V input with max 25 mm2 cables (screw terminal)

• PDU distributes DC power to other (max 8 mm2 cables)

• DC input power feed (48V) for Flexi EDGE BTS BTS has floating ground design

• Nominal 48 V DC, input range is 40.5 – 57 V DC.• Supply type: Two wire

• All functional blocks/submodules in the module of Flexi EDGE BTS BTS are designed as floating 48 V DC input Voltage

• Either positive or negative ground power feed for Flexi WCDMA BTS can be used

• All modules with DC input have input voltage reverse polarity protection

RF Module

RF Module

RF Module

System module

DC in

Nokia Site Support

or

3rdparty cabinet

BB Ext Module

TRX Module

TRX Module

TRX Module

System module

DC in

Nokia Site Support

or

3rdparty cabinet

RTC Module



More configuration examples



Flexi EDGE BTS 4-way Wideband Combining, 2-way RX diversity

Example: 8 TRx / Cell

Wideband Combiners Dual Duplexer

AntennasDualTRXs

Du

ple

xer

LNA

Du

ple

xer

LNA

Du

ple

xer

LNA+Multi-

coupler

Du

ple

xer

LNA+Multi-

coupler

WBCWBC

WBC

WBCWBC

WBC

TX1RX1 Main

DivdivRX2

MainDiv

TX2

TX3RX3 Main

DivdivRX4

MainDiv

TX4

TX5RX5 Main

DivdivRX6

MainDiv

TX6

TX7RX7 Main

DivdivRX8

MainDiv

TX8



Cables:Green: BusLight brown: PwrDark red: DDU-DTRXBlack: Antenna cablesRed small: RxBlue small: TxSmall gray: phase detector

Dual Duplexer

DTRX

DTRX

DTRX

DTRX

System Module

System Extension Module

Example: Flexi EDGE BTS 8+8+8 indoor configuration

WBC

WBC

WBC



Du

ple

xerLNA+Multi-

coupler

Cavities

LNA+Multi-

coupler

RX

filter R

X filter

TX5RX5 main

divRX6 main

TX6

TX3RX3 main

divRX4 main

TX4

Flexi EDGE BTSRTC (Remote Tune Combining) , 2-way RX

diversity

Example:6 TRX/cell

Remote TuneCombiner

AntennasDualTRXs3

3

3

3TX1RX1 Main

DivdivRX2

MainDiv

TX2



ULTRASITE Configuration Example

RTC , 2-way RX diversity, 6TRX/sector

AntennaAntennass

TRX RF TRX RF UnitsUnits

ReceiveReceiveMulticouplersMulticouplers

Remote TuneRemote TuneCombinerCombiner

TX

RXmain

div

TX

RXmain

div

TX

RXmain

div

TX

RXmain

div

TX

RXmain

div

splitter

splitter

6

6

6

main

div

Cavities

LNAs

Du

ple

xer



Du

ple

xerLNA+Multi-

coupler

Cavities

LNA+Multi-

coupler

RX

filter R

X filter D

up

lexerLNA+

Multi-coupler

Cavities

LNA+Multi-

coupler

RX

filter R

X filter

TX5RX5 main

divRX6 main

TX6

TX3RX3 main

divRX4 main

TX4

Remote Tune Combining, 2-way RX diversity

Example:12 TRX/cell

Remote TuneCombiners

AntennasDualTRXs3

3

3

3

TX11RX5 main

divRX6 main

TX6

TX9RX3 main

divRX4 main

TX43

3

3

3

TX1RX1 Main

DivdivRX2

MainDiv

TX2

TX7RX7 Main

DivdivRX8

MainDiv

TX8



Du

ple

xer

LNA

Du

ple

xer

LNA

Du

ple

xer

LNA+Multi-

coupler D

up

lexer

LNA+Multi-

coupler

Du

ple

xer

LNA

Du

ple

xer

LNA

Du

ple

xer

LNA+Multi-

coupler

Du

ple

xer

LNA+Multi-

coupler

Flexi EDGE BTS using DPTRX(TCC Combining), 4-way RX diversity

WBC

Dual Duplexers

DTRX Units

Example:1 Carrier/cell

TX1

RX1 MainDiv

Main/Div

RX2 MainDiv

TX2

Wideband Combiner(coherent)

Needed for supporting 2nd Duplexer (DC power)

TX3

RX3 MainDiv

Main/Div

RX4 MainDiv

TX4

Phase feedback

Antennas& MHA



Du

ple

xer

LNA

Du

ple

xer

LNA

Du

ple

xer

LNA+Multi-

coupler D

up

lexer

LNA+Multi-

coupler

Du

ple

xer

LNA

Du

ple

xer

LNA

Du

ple

xer

LNA+Multi-

coupler

Du

ple

xer

LNA+Multi-

coupler

Flexi EDGE BTS using DPTRX (TCC Combining),

4-way RX diversity

CWBC

Dual Duplexers

DTRX Units


CoherentWideband Combiners

TX1

RX1 MainDiv

Main/Div

RX2 MainDiv

TX2

TX3

RX3 MainDiv

Main/Div

RX4 MainDiv

TX4

CWBC

Phase feedback

Phase feedback

Antennas& MHA



Du

ple

xer

LNA

Du

ple

xer

LNA

Du

ple

xer

LNA+Multi-

coupler D

up

lexer

LNA+Multi-

coupler

SRC with IDD & 2-way RX diversity (with MHA)

Dual Duplexer

DualTRX


Antennasand MHAs

TX1

RX1 MainDiv

Main/Div

RX2 MainDiv

TX2



Du

ple

xer

LNA

Du

ple

xer

LNA

Du

ple

xer

LNA+Multi-

coupler

Du

ple

xer

LNA+Multi-

coupler

Du

ple

xer

LNA

Du

ple

xer

LNA

Du

ple

xer

LNA+Multi-

coupler D

up

lexer

LNA+Multi-

coupler

SRC with IDD, 4-way RX diversity with MHA

Dual Duplexers

Antennasand MHAs

DualTRXs

Example:2 Carriers /cell

MHA

TX3

RX3 MainDiv

Main/Div

RX4 MainDiv

TX4

TX1

RX1 MainDiv

Main/Div

RX2 MainDiv

TX2



LNA+ Multi-couple

r

RX

filte

r

Cavities

RX

filte

r

Du

ple

xer

LNA+ Multi-couple

r

1Xpol Antennas

X

X

TX5RX5

MainDiv

RX6 MainDivTX6

DivTX3RX3

MainDiv

RX4 MainDivTX4

DivTX1RX1

MainDiv

RX2 MainDivTX2

Div

Remote Tune Combining with 2-way RX diversity

Example: 6 TRX/cell

Remote TuneCombiner (RTC)

Dual TRXs

With RTC up to 6 Tx signals can be combined into 1 antenna, minimizing the combiner loss

6

6

6

2G Flexi BTS Information Slides

Documents

pwr dark red

lna multilna

flexi edge

remote tune

case 3hu unit

bts common

dual duplex

wideband combiner