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NSN Flexi multiradio Antenna System
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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
The information in this document is subject to change without notice and describes only the
product defined in the introduction of this documentation. This documentation is intended for the
use of Nokia Siemens Networks customers only for the purposes of the agreement under which
the document is submitted, and no part of it may be used, reproduced, modified or transmitted
in any form or means without the prior written permission of Nokia Siemens Networks. The
documentation has been prepared to be used by professional and properly trained personnel,
and the customer assumes full responsibility when using it. Nokia Siemens Networks welcomes
customer comments as part of the process of continuous development and improvement of the
documentation.
The information or statements given in this documentation concerning the suitability, capacity,
or performance of the mentioned hardware or software products are given "as is" and all liability
arising in connection with such hardware or software products shall be defined conclusively and
finally in a separate agreement between Nokia Siemens Networks and the customer. However,
Nokia Siemens Networks has made all reasonable efforts to ensure that the instructions
contained in the document are adequate and free of material errors and omissions. Nokia
Siemens Networks will, if deemed necessary by Nokia Siemens Networks, explain issues which
may not be covered by the document.
Nokia Siemens Networks will correct errors in this documentation as soon as possible. IN NO
EVENT WILL Nokia Siemens Networks BE LIABLE FOR ERRORS IN THIS DOCUMENTATION
OR FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO SPECIAL, DIRECT, INDIRECT,
INCIDENTAL OR CONSEQUENTIAL OR ANY LOSSES, SUCH AS BUT NOT LIMITED
TO LOSS OF PROFIT, REVENUE, BUSINESS INTERRUPTION, BUSINESS OPPORTUNITY
OR DATA,THAT MAY ARISE FROM THE USE OF THIS DOCUMENT OR THE INFORMATION
IN IT.
This documentation and the product it describes are considered protected by copyrights and
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The wave logo is a trademark of Nokia Siemens Networks Oy. Nokia is a registered trademark
of Nokia Corporation. Siemens is a registered trademark of Siemens AG.
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owners, and they are mentioned for identification purposes only.
Copyright Nokia Siemens Networks 2011. All rights reserved
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
Customer Confidential
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
Customer Confidential
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)
Customer Confidential
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
Customer Confidential
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.
Customer Confidential
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
Customer Confidential
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
Customer Confidential
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
Customer Confidential
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
Customer Confidential
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