Flexi Multiradio Antenna System Technical Overview

Flexi Multiradio Antenna System Technical Overview Nov 7th, 2011 v. 2.0.0

Customer Confidential 1 © Nokia Siemens Networks

Presentation / Author / Date

Flexi Multiradio Antenna System Technical Overview 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 other intellectual property rights according to the applicable laws. 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. Other product names mentioned in this document may be trademarks of their respective owners, and they are mentioned for identification purposes only. Copyright © Nokia Siemens Networks 2011. All rights reserved



Content (Agenda or Sections)

• • • • • • • • • •

Introduction Product Description Active Antenna components AAS Properties Beamforming Antenna Array Innovative site concept Interfaces Characteristics Features



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.



Product Description Examples on different high- / low-band variants*: 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 - 14º 0 - 10º 0 - 7º

0 - 14º 0 - 10º 0 - 7º

0 - 14º 0 - 10º 0 - 7º

0 - 14º 0 - 10º 0 - 7º

Beam forming

Vertical

Vertical

Vertical

Vertical

*

information subject to change

** specific band allocation on 800-band to be decided Customer Confidential 5 © Nokia Siemens Networks


Active Antenna components 8 PA’s / paths PSU & OVP

FSM Calibration Calibration O&M O&M

Common Module Calibration Calibration Control Control and and Measurement Measurement

RFM* or RRH*

Radio Module

RF BB

RF (2100)

Inbuilt Calibration in RF

RET

Active Antenna System

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 Customer Confidential 6 © Nokia Siemens Networks

Antenna Module (active & passive)


AAS Properties The main module of the AAS is the “Common module”. • It’s 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 PA’s per RF-module (totally 8 PA’s/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 (+/- 5º) Common module takes care of the electrical tilting on the active side along with the beamforming +/-7º Mechanical “fixed” tilt range 0º - 7º

Other properties: • PSU –

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

–

SPD class II (8/20us, 5kA)

• OVP/Surge protection:



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 TRX’s to enable the beamfoming. • With the capability to handle versatile processing, together with all the TRX’s 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



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 •

•

TX/PA is shut down and pre-set beamforming pattern is taken into use • •

•

Predefined recovery beam pattern will be activated

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



Beamforming Capabilities • • • • • • •

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

PA0 PA1

PA2

§ 4 TX PA / branches (per polarization) in the radio module connect to 3 or 2 passive elements in the antenna module.

PA3 PA4 PA5

AAS PA6 PA7

Common

8 x 10 W power amplifiers and 10 dipoles per antenna

FAR CELL


NEAR CELL


Antenna Array Typical radiation patterns:



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

0º, Horizon

Desired +/- 7º range

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

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


Innovative site concept to reduce OPEX E.g. GSM 1800 site evolution to WCDMA 2100 Very compact Flexi Multiradio BTS Site

Even more compact site with Flexi Multiradio Antenna System

Existing antenna replaced with wideband antenna

Added WCDMA 2100 antenna New feeders

2100 WCDMA radios in active antenna

New feeders

or

or

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

WCDMA 2100 GSM 1800

WCDMA 2100 GSM 1800

GSM 1800

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



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)

Radio Modules Fans Common Module

Power Consumption (typical*): 1x 40W with half load,

Pole Mount

– –

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 Customer Confidential 14 © Nokia Siemens Networks


Mechanical and Environmental Characteristics Dimensions: 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*

Cooling • Active cooling with long life fans Operating temperature range: • -40°C … +55°C Maintenance • Modules can be changed in the field. Installation options: • Mast, Pole and Wall Mounting

*For exact numbers for a particular AAS variant please see the Flexi Multiradio Antenna System - Product Description Customer Confidential 15 © Nokia Siemens Networks


RF characteristics, Antenna Active array

High Band variants*

Low Band variants**

Horizontal 3 dB Beam width

65º nominal

65º nominal

Vertical 3 dB Beam width

<7º nominal

<10º nominal

Antenna Gain (incl. passive split)

> 18dBi

> 17dBi

Polarization (any linear or elliptical)

Dual +/- 45º

Dual +/- 45º

Electrical Tilt

+/-7°

+/-7°

Mechanical tilt

0-7º (pre adjustable)

0-7º (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

65º nominal

65º nominal

Vertical 3 dB Beam width

<7º nominal

<10º nominal

Antenna Gain (incl. active split)

> 17.5dBi

> 16.5dBi

Polarization (any linear or elliptical)

Dual +/- 45º

Dual +/- 45º

Electrical Tilt

N/A

N/A

RET / Mechanical

+/-5º / 0-7º (pre adj.)

+/-5º / 0-7º (pre adj.)

Antenna Array Calibration

N/A

N/A

RX Diversity

Yes

Yes

RET Control

Yes

Yes

* High Band variants, 1710…2690MHz **Low Band variants, 791… 960 MHz Customer Confidential 16 © Nokia Siemens Networks


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

RX Sensitivity (GSM)

-112,5dBm

-112.5dBm

RX Sensitivity (WCDMA)

-124,7dBm

-124,7dBm

RX Sensitivity (LTE, 5 – 20MHz)

-105,7dBm

-105,7dBm

Receiver w/o div. ***

* 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.



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



Flexi Multiradio Antenna System Technical Overview

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