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1.1 OVERVIEW..................................................................................................... 5 1.2 SCOPE OF THIS DOCUMENT ..................................................................................... 5
Document Number: UMT/BTS/INF/022705 | Document Issue: 01.11/ EN | Document Status: Standard
Alcatel-Lucent – Proprietary
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1 INTRODUCTION
1.1 Overview
This document provides an overview and describes the characteristics of the W-CDMA Remote
Radio Head (RRH) 40W 2100 MHz from Alcatel-Lucent.
Its official naming is the Alcatel-Lucent 9341 RRH 40W 2100MHz, also named 9341 RRH40-21 in
the rest of the document (“40” for 40W, “21” for 2100 MHz).
The content of this document is not a commitment from Alcatel-Lucent. Alcatel-Lucent
reserves the right to change the technical specifications without notice until General
Availability of the product. For more information on features availability, please refer to the
Product Bulletins, Feature Planning Guides, Baseline and Release Notes.
1.2 Scope of this Document
The scope of this document is the Product Description for Alcatel-Lucent 9341 RRH 40W 2100
MHz (3GPP band I).
This document describes the 9341 RRH40-21 unit and the configurations it can/could enable.
It does not describe the digital Node B, refer to [R1], [R2] or [R3] for more information.
9341 RRH40-21 PRODUCT DESCRIPTION JANUARY 2008
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9341 RRH40-21 PRODUCT DESCRIPTION JANUARY 2008
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2 9341 RRH40-21 SOLUTION OVERVIEW
2.1 Overview
The Alcatel-Lucent distributed solution is composed of two main parts:
• The Alcatel-Lucent digital Node B
• The Alcatel-Lucent 9341 RRH40-21, located on the remote site: 9341 RRH40-21 provides the RF transceiver, MCPA and filter functions typically found in the
conventional Node B.
Figure 1 – Alcatel-Lucent 9341 RRH 40W 2100MHz
(without and with solar shield)
9341 RRH40-21 PRODUCT DESCRIPTION JANUARY 2008
Document Number: UMT/BTS/INF/022705 | Document Issue: 01.11/ EN | Document Status: Standard
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These two equipments are linked by optical fibres, carrying UMTS downlink and uplink (main
and diversity) base band digital signals along with OAM information.
Figure 2 – 9341 RRH40-21 System Overview
(Star Configuration Supported From 9326 d2U Node B)
2.2 Product Positioning
Alcatel-Lucent distributed solution is designed to provide operators with the means to achieve
a high quality and capacity coverage with minimum site requirements.
9341 RRH40-21 is designed for macro-cellular applications, and is an alternative to
conventional Macro Node B.
Local site
optical fiber
Remote site 9341 RRH40-21
Optical interfacein 9326 d2U
9341 RRH40-21 PRODUCT DESCRIPTION JANUARY 2008
Document Number: UMT/BTS/INF/022705 | Document Issue: 01.11/ EN | Document Status: Standard
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The advantages of using Alcatel-Lucent 9341 RRH40-21 to replace a traditional Node B are
most evident in rooftop installations. In fact, the limited space available in some sites may
either prevent the installation of traditional Macro Node B equipment or require costly cranes
to be employed, thus coverage holes may appear. These sites can however host 9341 RRH40-
21 installation providing more flexible site selection and therefore improved network quality.
In addition installation times and costs are greatly reduced.
Figure 3 - Site Benefits of Deploying 9341 RRH40-21
2.3 Benefits of 9341 RRH40-21
In comparison with a traditional Node B site, the following benefits are achieved:
2.3.1 Higher Savings On Remote Sites
Faster and lower cost implementation:
• Due to its small size and weight, operators can locate the 9341 RRH40-21 where RF
engineering deems ideal, trade-offs between available sites and RF optimum sites are
minimized
• 9341 RRH40-21 is a zero footprint solution and a noise-free module: this allows for
simpler negotiation with site landlords and minimize the impact on the
environment/neighbourhood
• Less civil works are required. There is no need for reinforcing steel frames to support
heavy outdoor Node B cabinet (around 300Kg). 9341 RRH40-21 weighs less than 20kg.
• 9341 RRH40-21 is an easy-to-install product (sizes below 30l): the installation can be
done by a single person, no cranes are needed to hoist the Node B cabinet to the
rooftop.
• A site can be on air in < one day, a fraction of the time required for a traditional Node
B.
Less rental area:
• The footprint of a cluster of 9341 RRH40-21 is much less than the footprint of a
traditional Node B cabinet (in some cases also transmission cabinet, battery cabinet
and power distribution cabinet) therefore the monthly rental fees are considerably
reduced (less footprint and weight).
After
Radio
Digital
RRH
Backhaul Backhaul
Antenna Antenna
Optical Link
RF JumperRF Feeder
Before
Digital
After
Radio
Digital
RRH
Backhaul Backhaul
Antenna Antenna
Optical Link
RF JumperRF Feeder
Before
Digital
9341 RRH40-21 PRODUCT DESCRIPTION JANUARY 2008
Document Number: UMT/BTS/INF/022705 | Document Issue: 01.11/ EN | Document Status: Standard
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Less equipment on site:
• The digital Node B cabinet does not need to be installed on the rooftop and can be
placed in the basement (with fibre running to 9341 RRH40-21 in rooftop) or in
centralized Node B “hotels” (if dark fibre is available between sites).
• No need for TMAs due to the fact that the feeder losses are dramatically reduced (9341
RRH40-21 are mounted close to antennas)
Great RF performance thanks to the capability of installing 9341 RRH40-21 close to the
antenna:
• No RF feeders are needed, only jumpers from 9341 RRH40-21 to the antenna. This
reduces the feeder loss in UL/DL, having several consequences:
− The feeder cost and installation costs are reduced.
− In the UL, there is no need for a TMA, as the losses introduced by the RF feeder are
greatly reduced.
− In the DL, no RF power is dissipated in the feeder runs. The PA power can be
reduced while maintaining the same RF power at the antenna. This results in the
power consumption of the equipment being reduced. Compared to a conventional
Node B (equipped with MCPA 60W) that delivers about 20W at the antenna level
delivers 65% more RF power while consuming half the power.
2.3.2 Reduced CAPEX and OPEX
2.3.2.1 Reduced CAPEX
• Where dark fibre is available, Node Bs can be centralized (Node B hotels) off-town,
thus further reducing the site construction/ acquisition cost, normally higher in urban
areas: cost is further decreased by the use of one single fibre (thanks to single-mode
CWDM feature) per remote site (assuming daisy-chain), leading to a dark fibre lease
cost reduction factor of up to 6.
• A digital Node B can serve several remote sites and Channel Element pooling amongst
them further reduces equipment costs.
2.3.2.2 Reduced OPEX
• Up to 50% reduction in power consumption.
• 20% less site visits: as the Channel Element cards are in the digital Node B cabinet,
there is no need to visit the remote site for capacity upgrades.
• 9341 RRH40-21 has a high MTBF and uses natural convection cooling to produce a zero
noise high reliability fan-less solution.
• Operation and management is simplified as number of Node Bs that need to be
managed is reduced (one digital Node B can serve several remote sites) and they are in
the same location.
• Transmission costs are reduced as no leased E1/T1 is needed, instead owned and/or
leased optical fibre between 9341 RRH40-21 site and centralized base station.
9341 RRH40-21 PRODUCT DESCRIPTION JANUARY 2008
Document Number: UMT/BTS/INF/022705 | Document Issue: 01.11/ EN | Document Status: Standard
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3 9341 RRH40-21 PRODUCT DESCRIPTION
3.1 Overview
9341 RRH40-21 is a single sector 2100 MHz (3GPP band I) self-contained radio module,
including:
• A 2100 MHz transceiver
• An MCPA
• A duplexing system
• An optical interface
• A power system
9341 RRH40-21 delivers 40W nominal composite RF power at antenna port and supports up to
3 carriers.
It is an outdoor product, supporting -40°C/+50°C temperature range (up to +55°C with de-
rated RF power) using natural convection cooling (no fans).
The functional architecture of 9341 RRH40-21 is depicted on the following figure:
Figure 4 – 9341 RRH40-21 Functional Architecture
µControllerOAM interface
LNA
PA
LNAO E
Main antenna
Diversity antenna
RF to digital converter
BB processing
(CPRI, PPR, DUC, DPD)
RF to digital converter
Digital to RF converter
Digital Node B
O ECascadingport
Filter & DC/DC
DC Power input
DPD loop
User alarms
CouplerTx
coupling
µControllerOAM interface
LNA
PA
LNAO E
Main antenna
Diversity antenna
RF to digital converter
BB processing
(CPRI, PPR, DUC, DPD)
RF to digital converter
Digital to RF converter
Digital Node B
O ECascadingport
Filter & DC/DC
DC Power input
DPD loop
User alarms
CouplerTx
coupling
9341 RRH40-21 PRODUCT DESCRIPTION JANUARY 2008
Document Number: UMT/BTS/INF/022705 | Document Issue: 01.11/ EN | Document Status: Standard
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In downlink, 9341 RRH40-21 receives the optical signal from the digital Node B in accordance with CPRI format. The signal is converted into an electrical digital base band signal, which
goes then through several digital processing functions (filtering, digital up-conversion, peak
power reduction, digital pre-distortion). The resulting digital signal is digital to analogue
converted and up converted to an RF signal. The RF signal is amplified through a power
amplifier and fed to the duplexer. 9341 RRH40-21 measures continuously the transmit RF
power and has the capability to monitor VSWR.
In uplink, two signals are received from the main and diversity antennas. They are amplified, through low noise amplification chains, and down-converted before being converted into
digital signals. The resulting digital signals go through different digital processing functions
(digital down-conversion, filtering), and are then multiplexed according to the required CPRI
format and converted into optical signals that are sent to the digital Node B.
9341 RRH40-21 has two antenna ports: one port is connected to a duplexer, which provides
the necessary isolation to connect the transmitter and one receiver on the same antenna. The
second 9341 RRH40-21 port enables RX diversity. 9341 RRH40-21 also provides a TX coupling
port for on-field test purpose.
The digital Base-Band processing provides daisy-chain capabilities to link several 9341 RRH40-
21 with only one fibre link coming from the digital Node B.
9341 RRH40-21 is offered in 2 variants, according to optical interface (Single-Mode or Multi-
Mode optical fibre).
9341 RRH40-21 PRODUCT DESCRIPTION JANUARY 2008
Document Number: UMT/BTS/INF/022705 | Document Issue: 01.11/ EN | Document Status: Standard
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3.2 9341 RRH40-21 Main Characteristics
Main characteristics are summarized in the following table:
Mechanical Characteristics
Sizes (HxWxD) in
mm
463 x 260 x 210 (25 liters) (without solar shield)
463 x 268 x 226 (28 liters) (with solar shield)
Weight 19 kg – 18kg without solar shield
Environmental Outdoor: -40ºC to +50ºC (up to +55°C with de-rated RF power) - no fan ( natural
convection cooling ) - IP65
RF Characteristics
Number of carriers Up to 3 adjacent carriers (15 MHz)
RF output power
@antenna port
40W nominal RF power: 40W x 1 carrier - 20W x 2 carriers - 13W x 3 carriers
RX diversity 2-way diversity
Noise Figure 2,5 dB typical (typical sensitivity is -125,5 dBm wrt 3GPP 25.104 w/o RX
diversity)*
RF features RETA HW ready (AISG 1.1 - class 1 RET) - TMA support
VSWR meter on TX antenna path (2 thresholds report) - TX coupling port
Optical Characteristics
Type/number of
fibres
1,2 Gbps line bit rate ( CPRI OS.12 & OL.12, refer to [A19] )
Single-Mode variant: one SM fibre (9/125µm), refer to [A25]) per 9341 RRH40-21
carrying UL and DL using CWDM (@1550/1310nm)
Multi-Mode variant: two MM fibres (50/125µm), refer to [A26]) per 9341 RRH40-
21, one carrying UL, 2nd carrying DL (@850 nm)
Optical fibre length Up to 500m, using MM fibre
Up to 10km, using SM fibre
Up to 20km, using SM fibre (for future)
Miscellaneous Characteristics
Power supply DC variant : -48V ( -40.5V/-57V )
Typical power consumption ≈ 230 W ( at continuous 40W RF power )
Features External alarms (6) – LEDs – Daisy-Chain HW ready ( 2 optical ports per 9341
RRH40-21 )
(*) assuming xCEM performance
Table 1 - 9341 RRH40-21Main Characteristics
9341 RRH40-21 PRODUCT DESCRIPTION JANUARY 2008
Document Number: UMT/BTS/INF/022705 | Document Issue: 01.11/ EN | Document Status: Standard