Flexi Multiradio Antenna System Technical Overview

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  • Customer Confidential

    1 Nokia Siemens Networks Presentation / Author / Date

    Nov 7th, 2011

    v. 2.0.0

    Flexi Multiradio Antenna System Technical Overview

  • Customer Confidential

    2 Nokia Siemens Networks Presentation / Author / Date

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    Flexi Multiradio Antenna System Technical Overview

  • Customer Confidential

    3 Nokia Siemens Networks Presentation / Author / Date

    Content (Agenda or Sections)

    Introduction

    Product Description

    Active Antenna components

    AAS Properties

    Beamforming

    Antenna Array

    Innovative site concept

    Interfaces

    Characteristics

    Features

  • Customer Confidential

    4 Nokia Siemens Networks Presentation / Author / Date

    Introduction

    The Nokia Siemens Networks Flexi Multiradio Antenna System is the single column Active Antenna System (AAS) which is the integrated, fully operational unit with integrated antenna array, transceiver and filter modules, including the integrated common module for processing the active antenna specific functions. For a complete BTS the FlexiSystemModule (FSM) is needed in addition the AAS.

    The FDD Active Antennas are able to support fixed beam forming, independent electrical tilting per carrier / system, vertical sectorisation, including separate Tx and Rx tilt. User-based beam forming will also be enabled in the future.

    Radio-related signal processing is performed both in RF and Common Module. The common module controls also the antenna array related functionalities as well as the interface to the FSM.

  • Customer Confidential

    5 Nokia Siemens Networks Presentation / Author / Date

    Product Description

    AAS 2100A/1800P

    (FAGF)

    AAS 2100A/900P

    (FAGP)

    AAS 900A/800P (FADM) AAS 800A/900P

    (FAMD)

    Dimensions

    (WxDxH) 238x214x1500 265x260x2500 300x260x2500 300x260x2500

    Approx weight 32 kg 45 kg 40 kg 40 kg

    # PA 8 8 8 8

    Frequency/

    Tech - 2100 Active

    (WCDMA,LTE)

    - 1800 Passive

    - 2100 Active

    (WCDMA,LTE)

    - 900 Passive

    - 900 Active

    (GSM, WCDMA)

    - 800 Passive

    - 800 active

    (LTE)

    - 900 Passive

    EIRP 66.5 dBm 66.5 dBm 65.5 dBm 65.5 dBm

    Antenna Gain Act >18dBi >18dBi >17 dBi >17 dBi

    AAS RF IBW (TX) 40 MHz 40 MHz 35 MHz 30 MHz**

    Tilt Electrical

    Tilt RET

    Tilt Mech

    0 - 14

    0 - 10

    0 - 7

    0 - 14

    0 - 10

    0 - 7

    0 - 14

    0 - 10

    0 - 7

    0 - 14

    0 - 10

    0 - 7

    Beam forming Vertical Vertical Vertical Vertical

    Examples on different high- / low-band variants*:

    * information subject to change

    ** specific band allocation on 800-band to be decided

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    6 Nokia Siemens Networks Presentation / Author / Date

    Active Antenna System

    Inbuilt Calibration in RF

    8 PAs / paths

    Calibration

    O&M

    Calibration

    O&M

    Common Module

    FSM

    Calibration

    Control and Measurement

    Calibration

    Control and Measurement

    Antenna

    Module

    (active &

    passive)

    RET

    RFM* or

    RRH*

    Active Antenna components

    AAS main blocks:

    Common module (CM)

    Radio Module (RM)

    RF Baseband (RFBB)

    RF-Power Amplifiers

    Antenna Module

    X-polarized antenna array

    2100/1800 interfaces via diplexers

    RET

    Internal PSU & OVP

    RF (2100) RF BB

    Radio Module

    PSU & OVP

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    7 Nokia Siemens Networks Presentation / Author / Date

    AAS Properties

    The main module of the AAS is the Common module. Its functionalities are:

    Interface for power Interface for system module/RF chaining using the 2 OBSAI ports Data processing Simultaneous TRX commanding TRX Calibration and synchronising Beam forming and shaping

    The 2TX/2RX RF-modules (totally 4pcs/AAS)

    Main properties: 2 x10W PAs per RF-module (totally 8 PAs/AAS) 2 x 4 LNA (totally 8pcs/AAS) Each PA and RX is connected to the diplexers

    The antenna array:

    Main properties: Dual band active / passive support Typically 8 diplexers feeding 10 radiators Integrated RET on passive side (+/- 5) Common module takes care of the electrical tilting on the active side along with the beamforming +/-7 Mechanical fixed tilt range 0 - 7

    Other properties:

    PSU 48VDC, 110-230VAC with optional AC-module

    OVP/Surge protection: SPD class II (8/20us, 5kA)

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    8 Nokia Siemens Networks Presentation / Author / Date

    Beamforming

    The Common module within the AAS is the processing unit for beamforming. The unique vertical sectorisation enables up to 65% capacity gain.

    It takes care of the simultaneous TRX synchronisation and tuning with extremely small performance differences between all TRXs to enable the beamfoming.

    With the capability to handle versatile processing, together with all the TRXs it is capable to support various beamforming features: Electrical tilting Sector (Cell) splitting Separate Tx/Rx tilting Carrier specific tilting Radio standard (RAT) specific tilting User specific tilting Operator specific tilting Soft recovery /AAS graceful degradation

    The unique electrical tilting capability is the actual capacity enabler. It also improves the RF-performance and quality. Cell splitting, by creating e.g. two beams w/ different tilt angles from the same AAS

    enables more dense frequency re-farming in the NW with the same HW.

    Having different TX and Rx angles in the same beam and/or carrier improves the RF quality even further

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    9 Nokia Siemens Networks Presentation / Author / Date

    Soft Recovery

    AAS graceful degradation Single TX PA or TX branch failure is not blocking remaining operational AAS. Multiple

    PA failures are also tolerated but with performance decrease (less DL power, distorted beam pattern)

    In case of TX/PA failure, AAS unit will automatically change the beamforming pattern to the most optimal depending which TX/PA unit fails

    Benefits of graceful degradation: No "emergency service" action are required and the repair can mostly be done during the routine

    maintenance activity

    Replacement of faulty module can be done on site w/o taking the whole AAS down

    Operation scheme: TX reports malfunction (e.g. TX power/TX calibration out of range) RX and TX calibration sequences are run, calibration data will indicate faulty TX or RX branch

    Predefined recovery beam pattern will be activated

    TX/PA is shut down and pre-set beamforming pattern is taken into use Calibration functionality is also able to detect faulty RX antenna branch If fault remains, then a non blocking alarm/service request is generated to request AAS unit service in BTS

    Alarm message sent to BTS O&M Manager & OSS

  • Customer Confidential

    10 Nokia Siemens Networks Presentation / Author / Date

    Beamforming Capabilities

    AASAASAASAAS

    Common

    PA1

    PA2

    PA3

    PA4

    PA0

    PA5

    PA6

    PA7

    Common

    PA1

    PA2

    PA3

    PA4

    PA0

    PA5

    PA6

    PA7

    8 x 10 W power amplifiers and

    10 dipoles per antenna

    NEAR CELLFAR

    CELL

    Electrical tilting (-/+ 7 deg) Cell splitting (vertically) Separate Tx/Rx tilting Carrier specific tilting System specific tilting Operator specific tilting Soft recovery / AAS graceful degradation

    4 TX PA / branches (per

    polarization) in the radio

    module connect to 3 or 2

    passive elements in the

    antenna module.

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    11 Nokia Siemens Networks Presentation / Author / Date

    Antenna Array

    Typical radiation patterns:

  • Customer Confidential

    12 Nokia Siemens Networks Presentation / Author / Date

    Tilt angles

    Active side tilt range:

    The electrical tilt range is +/-7, I.e. 14 in total. Instead of a 0 to 14 electrical tilting, the +/-7 gives less side lobes. With the mechanical fixed tilt 0 to 7, it is possible to pre set the desired 14 range. Total tilt range available end up being between -7 to +14

    Passive side tilt range:

    The RET tilt range is +/-5, I.e. 10 in total. Here again, instead of a 0 to 10, with the +/-5 gives less side lobes. With the mechanical fixed tilt 0 to 7, it is possible to pre set the desired 10 range. Total tilt range available end up being between -5 to +12

    0, Horizon Desired +/- 7 range

    Tot. range Electrical + Mechanical tilt: -7 - +14

  • Customer Confidential

    13 Nokia Siemens Networks Presentation / Author / Date

    WCDMA 2100

    GSM 1800

    Very compact Flexi Multiradio BTS Site

    Existing 1800 GSM radio connected to passive part of the active antenna

    2100 WCDMA radios in active antenna

    or

    Existing antenna replaced with wideband antenna

    Added WCDMA 2100 antenna

    Even more compact site with

    Flexi Multiradio Antenna System

    WCDMA 2100

    GSM 1800 GSM 1800

    Existing feeders

    New feeders New feeders

    Innovative site concept to reduce OPEX E.g. GSM 1800 site evolution to WCDMA 2100

    Flexi Multiradio Antenna System provides even more compact site solution

    New band can be introduced without visible changes

    Excellent solution for already fully crowded sites

    or

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    14 Nokia Siemens Networks Presentation / Author / Date Presentation / Author / Date

    Interfaces

    Antenna connector to passive array

    2 x 7/16-type, female RF signal interface external radio. RET connector

    OBSAI Interface to active array

    2 SFP Connectors, second port is prepared for HW chaining, Optical Connector Type: Duplex LC RP3-01, Bit Rate 3.072 Gbit/s and 6.144 Gbit/s support

    Management interface

    EAC connectors LMT connection

    Interfaces to active array

    DC Input Voltage: -48VDC nominal DC Connector Type: Screw type (Flexi Type 3) Reverse Polarity Protection Optional external AC/DC converter OVP: SPD class II (8/20us, 5kA)

    Power Consumption (typical*):

    1x 40W with half load, High band variants: < 180 W Low band variants: < 190 W

    2x 40W with full load, High band variants: < 350 W Low band variants: < 400 W

    *For exact numbers for a particular AAS variant please see the

    Flexi Multiradio Antenna System - Product Description pdf

    Radio Modules

    Pole Mount

    Common Module

    Fans

  • Customer Confidential

    15 Nokia Siemens Networks Presentation / Author / Date Presentation / Author / Date

    Mechanical and Environmental Characteristics

    Dimensions:

    Cooling

    Active cooling with long life fans Operating temperature range:

    -40C +55C Maintenance

    Modules can be changed in the field. Installation options:

    Mast, Pole and Wall Mounting

    Active High Band variants Active Low Band variants

    Width 220mm 300mm 300mm

    Depth 180mm 260mm 260mm

    Height 1400mm 2500mm 2500mm

    Weight 30kg 45kg* 40 kg*

    *For exact numbers for a particular AAS variant please see the

    Flexi Multiradio Antenna System - Product Description

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    16 Nokia Siemens Networks Presentation / Author / Date Presentation / Author / Date

    RF characteristics, Antenna Active array High Band variants* Low Band variants**

    Horizontal 3 dB Beam width 65 nominal 65 nominal

    Vertical 3 dB Beam width 17dBi

    Polarization (any linear or elliptical) Dual +/- 45 Dual +/- 45

    Electrical Tilt +/-7 +/-7

    Mechanical tilt 0-7 (pre adjustable) 0-7 (pre adjustable)

    Antenna Array Calibration Internal, Automatic Internal, Automatic

    MIMO 2x2 2x2

    Rx Diversity Yes Yes

    Beam Control Yes, with O&M SW Yes, with O&M SW

    Passive array High Band variants Low Band variants

    Horizontal 3 dB Beam width 65 nominal 65 nominal

    Vertical 3 dB Beam width 16.5dBi

    Polarization (any linear or elliptical) Dual +/- 45 Dual +/- 45

    Electrical Tilt N/A N/A

    RET / Mechanical +/-5 / 0-7 (pre adj.) +/-5 / 0-7 (pre adj.)

    Antenna Array Calibration N/A N/A

    RX Diversity Yes Yes

    RET Control Yes Yes

    * High Band variants, 17102690MHz

    **Low Band variants, 791 960 MHz

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    17 Nokia Siemens Networks Presentation / Author / Date Presentation / Author / Date

    RF characteristics, AAS RF module

    Transceiver High Band variants Low Band variants

    Nominal output power at TX out

    8x10W (40MHz) 8x10W (30-35MHz)

    Maximum # of carriers WCDMA 8* 8*

    Maximum # of carriers LTE 2* 2*

    Max # of Beams 8 8

    Max GSM / EDGE TRX 4** 4**

    EGPRS back-off -1dB -1dB

    * Assuming 5MHz WCDMA carriers or 2x2 MIMO with LTE, vertical sectorisation will not increase the no of carriers

    ** Less, if 2 x WCDMA or more reframing carriers are exceeded

    *** RX Sensitivity with diversity is the same or more than with current macro BTS. System gain not taken into account.

    Receiver w/o div. ***

    RX Sensitivity (GSM)

    -112,5dBm -112.5dBm

    RX Sensitivity (WCDMA)

    -124,7dBm -124,7dBm

    RX Sensitivity (LTE, 5 20MHz)

    -105,7dBm -105,7dBm

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    18 Nokia Siemens Networks Presentation / Author / Date Presentation / Author / Date

    Flexi Multiradio Antenna System Features

    GSM WCDMA LTE

    Electrical tilt yes yes yes

    Carrier specific tilt N/A yes yes

    Vertical sectorisation TBC yes yes

    Beam forming yes yes yes

    Separate TX/RX tilt N/A yes yes

    System specific tilting yes yes yes

    BCCH Dynamic power control yes N/A N/A

    Power saving features yes yes yes

    Soft recovery yes yes yes

    2x2 MIMO N/A yes yes

    MHA N/A N/A N/A

    RET (passive port) yes yes yes

    Vertical radiation patterns from same active antenna