Ericsson RBS 2207 Technical specifications

EN/LZT 720 0134 Uen R3A
RBS 2207
Radio Base Station
Product Description
The RBS 2207, a member of the RBS 2000 family, is a 6–TRX radio base
station for indoor applications. This cabinet covers the same floor area as the
RBS 2202 and RBS 2206, but the cabinet height is lower.
P010987A
E
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RBS 2207
Contents
1 Product Overview 3
1.1 Main Features 3
1.2 Variants 3
1.3 Optional Equipment 4
2 Dimensions 4
3 Space Requirements 4
4 Environment 7
4.1 Operating Environment 7
4.2 Environmental Impact 8
4.3 Compliance Distances for Electromagnetic Exposure 8
4.4 Materials 11
5 Hardware Units 11
5.1 Standard Hardware Units 12
5.2 Optional Hardware Units 14
6 Interfaces 15
6.1 External Connections 16
6.2 Test Interface 17
6.3 Operator Interface 17
7 Power System 18
7.1 AC mains supply voltage 18
7.2 +24 V DC Supply Voltage 19
7.3 -48 to -60 V DC Supply Voltage 20
7.4 Battery Back-up 20
7.5 Power Consumption 21
8 Transmission 21
9 Alarms 22
10 Standards, Regulations and Dependability 22
10.1 Safety Standards 22
10.2 Other Standards and Regulations 22
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1 Product Overview
The RBS 2207 is a medium capacity indoor base station. It is used for indoor
applications, with up to three double Transceiver Units (dTRU). The RBS 2207
is designed to be transported as a fully-assembled cabinet to the site. All
interior units are easily accessible from the front of the cabinet, which means
that the cabinets can be mounted side by side with their backs against a wall.
1.1 Main Features
The RBS 2207 can support the following features:
• 1, 2 or 3 sectors in one cabinet using CDU-G and/or CDU-J
• Discontinuous transmission/reception
• Duplex filters
• Dynamic power regulation
• Encryption/ciphering
• EDGE
• Expansion by tranceiver group (TG) synchronization
• External alarms
• Frequency hopping
• Global positioning system (GPS) synchronization
• Radio configurations supported on 800, 900, 1800 and 1900 MHz
• Receiver diversity
• Transmission Interface: The following transport network interface
alternatives exist:
- T1 1.5 Mbit/s, 100 , with internal synchronization
- E1 2 Mbit/s, 75 , with PCM synchronization
- E1 2 Mbit/s, 120 , with PCM synchronization
• Wide range power input 120 - 250 V AC
• Wide range power input -48 to -60V DC
1.2 Variants
There are three RBS 2207 cabinet versions:
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• -48 to -60 V DC
• 120 - 250 V AC, 50 to 60 Hz, +24 V DC, with optional battery back-up
• +24 V DC (without PSUs)
1.3 Optional Equipment
The equipment listed below is available, but is not necessary for basic
functionality.
• Battery back-up (in a separate cabinet)
• Bias injectors
• dual duplex Tower Mounted Amplifier (ddTMA)
• External synchronization bus (ESB)
• Distribution Frame (DF) with OVP
• TMA-CM
• Transmission Adapter (TA)
• GPS receiver
2 Dimensions
The following section describes the measurements of the RBS 2207.
Table 1 Weight
Unit Weight
RBS cabinet (fully equipped including
base frame)
180 kg (397 lbs.)
Base frame 8 kg (18 lbs.)
Table 2 Color
Color Reference No.
Grey NCS 1002-R
3 Space Requirements
The following sections indicate the required space and recommended floor
layout.
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Free Space above the RBS Cabinet
P010922A
1300
Min. 1600
Min.250
400
600
Min. 300
1350
Figure 1 RBS 2207, free space above the cabinet
The recommended distance between the cabinet and cable ladder is 250 mm.
A shorter distance makes it difficult to exchange fans and may restrict the air
flow. A space of 300 mm is recommended above the cable ladder, in order to
simplify the cable installation work.
The door projects 70 mm in front of the cabinet.
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Layout for RBS Cabinets
P007781A
1000
1000
Unit of measurement: mm
RBS
RBS
RBS
BBS
a=130o
Figure 2 Floor layout and space requirements
The RBS cabinets and battery back-up system (BBS) racks are mounted on
the floor, and may be positioned against a wall, back to back, or free standing
without contact with other cabinets.
Additional cabinets and racks can be positioned to the left or right of the first
installed cabinet. However, expansion to the right is recommended in order
to follow the same global standard.
A distance of 1000 mm in front of the cabinets and racks for maintenance work
is recommended.
Note: Space for future expansion must be considered as indicated in the
dotted line in the figure above.
Earthquake Requirements
If the RBS cabinet is to fulfill the requirements for earthquake protection, the
space between wall and cabinet is to be at least 100 mm and between cabinets
at least 150 mm.
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Footprint
Unit of measurement: mm
P010951A
(RBS 2202)
FRONT
99 400
598
220
45
320 400
o 20x75
RBS 2206 / RBS 2207
Figure 3 Hole pattern overview
The RBS 2207 has the same footprint as the RBS 2202 and 2206 cabinets.
The base frame can be used as a template to mark new holes. If an RBS
2202 or an RBS 2206 is being replaced by an RBS 2207, the holes for the old
cabinet can be used for the new cabinet.
4 Environment
The RBS 2207 is designed to operate within limits stated for climatic
requirements, and also to have a limited effect on the environment.
4.1 Operating Environment
The climatic requirements the RBS 2207 has on the site are shown in the
table below.
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Table 3 Environmental specifications
Environmental
Parameters
Normal Operation
(1) Safe Function Non-
destructive
Conditions (2)
Temperature +5 to +40 C 0 to +45 C -10 to +55 C
Relative Humidity 5 - 85% 5 - 90% 5 - 90%
(1) Normal operation describes the environmental conditions where all units function as specified.
(2) Non-destructive conditions describe environmental stress above the limits for normal
conditions with no function guaranteed and unspecified degradation. When the environmental
stress has dropped to normal conditions, restoring full RBS performance requires no manual
intervention on site. Non-destructive conditions refer to a maximum period of 96 consecutive
hours, and a maximum total of 5.5 days in a three-year period.
Ground Vibrations
The RBS 2207 is tested to withstand random vibrations of up to 0.2 m²/s². It is
also tested for single shocks up to 40 m/s². The cabinet is tested for seismic
exposure with a test frequency of 1 - 35 Hz. Maximum test level of the Required
Response Spectrum (RRS) is 50 m/s² within 2 - 5 Hz. The shape of RRS is
defined by the ETSI standard.
Levelling
For cabinet levelling purposes, the floor must be level to within ±3 mm/2000
mm and the floor gradient be within ±0.1 .
4.2 Environmental Impact
This section describes the effect that the cabinet has on the environment.
Heat Dissipation
The RBS 2207 generates an average heat load of 1000 W. The exact figure is
dependent upon confguration, equipment and site-specific conditions.
4.3 Compliance Distances for Electromagnetic Exposure
The compliance distance is the minimum separation that should be kept
between an antenna and a person in order to ensure that ICNIRP RF exposure
limits are not exceeded.
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Note: ICNIRP, ‘‘Guidelines for limiting exposure to time-varying electric,
magnetic, and electromagnetic fields (up to 300GHz)’’, International
Commission on Non-Ionizing Radiation Protection, Health Physics,
vol. 74, no. 4, 1998.
Ericsson has performed a free-space near-field RF exposure assessment
of typical configurations of RBS 2207 with a recommended antenna. The
resulting dimensions, in meter, for a compliance boundary for both public and
occupational exposure are shown in Table 4.
The compliance boundary is defined as a cylinder around the antenna, see
figure below. The antenna is not located at the centre of the cylinder. Instead
it is located almost at the edge, facing towards the center of the cylinder.
The distance between the antenna’s rear and the edge of the cylinder is the
"Distance behind antenna". The height of the cylinder is the antenna height
plus equal distances above and below the antenna. The cylinder shape
overestimates the compliance distances right beside the antenna.
P009694A
Diameter
Height
Antenna
Distance
behind
antenna
Figure 4 Compliance boundary cylinder
Note: Table 4 shows an example for a typical antenna. As the antenna field
distributions will differ, complete calculations or measurements may
be necessary in order to establish the compliance boundary for other
configurations chosen by the customer. For further information on
calculation methods, see:
Radio Site Installation Engineering
Manual EN/LZN 720 0069
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Table 4 Compliance boundary dimensions for the general public (GP) and
occupational (O) exposure for typical configurations.
Dimensions of cylindrical compliance boundary in
meter (m)
Diameter Height Distance
behind
Fre-
quency
(MHz)
RBS con-
figuration
GP O GP O GP O
900 3x2 un-
combined
7 3 1.7 1.4 0.1 0.1
1800 3x2 un-
combined
5 1 1.6 1.4 0.1 0.05
900 3x2
combined
4 1 1.5 1.4 0.1 0.1
1800 3x2
combined
2 0.5 1.4 1.4 0.1 0.05
900 3x1 comb.
TCC
6 3 1.7 1.4 0.1 0.1
1800 3x1 comb.
TCC
5 1 1.6 1.4 0.1 0.05
Compliance distances to the side of the antenna for occupational exposure
are 0.15 m for all configurations above. For characteristics of an antenna
recommended for typical configurations of an RBS 2207, see Table 5.
Table 5 Characteristics for a typical antenna (KRE 101 1916/1)
Antenna specifications X-pol macro RBS sector antenna
Antenna height 1.3 m
Horizontal half-power beam width 65 degrees
Vertical half-power beam width 14.5 degrees at 900 MHz, 7.8 degrees
at 1800 MHz
Antenna gain 14 dBi at 900 MHz, 16.5 dBi at 1800
MHz
Downtilt 0 degrees
The maximum power fed to the antenna, as a function of the number of
transceiver units (TRUs) per antenna and maximum power (including tolerances
and transmission loss) per TRU, for RBS 2207, are given in Table 6.
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Table 6 Maximum power to antenna for various RBS 2207 configurations
RBS
configurations
Frequency
(MHz)
Nominal output
power per TRU
(dBm)/(W)
Maximum
power into
antenna(1)
(dBm)/(W)
3x2 uncombined 900 45.5/35 47.5/56.2
1800 44.5/28 46.5/44.7
3x2 combined 900 42/16 44/25
1800 41/13 43/20
3x1 combined 900 48/63 47/50
TCC 1800 47/50 46/40
(1) Including power tolerance level (+2dB) and transmission losses (–3dB).
4.4 Materials
All Ericsson products fulfill the legal, market and Ericsson requirements
regarding:
• Fire resistance of material, components, wires and cables
• Declaration of materials
• Use of restricted material
• Recycling
Package Material
The package material is recyclable.
5 Hardware Units
A high level of availability is achieved using strict functional modularity with a
system of standardized units. A failed unit can easily be replaced by a new one.
The RBS 2207 cabinet contains the radio equipment, power supply and the
climate equipment (fans). All required transmission equipment and battery
back-up must be housed outside the cabinet.
Outside equipment is listed under optional units. Not all HW units are covered
in this section, only those directly related to the RBS.
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5.1 Standard Hardware Units
This section briefly describes the standard hardware units required for
functionality, irrespective of configuration or frequency.
PSU
FCU
ACCU or
DCCU DC filter
IDM
CDU
DXU
TMA-CM (optional)
dTRU
Connectition
field
Connectition
field
P010920A
Figure 5 Standard hardware units
ACCU - AC Connection Unit
The ACCU distributes the incoming AC power supply voltages to the PSUs.
The unit also contains AC filter equipment.
Number of units: 0 - 1
CDU - Combining and Distribution Unit
The CDU is the interface between the transceivers and the antenna system.
All signals are filtered before transmission, and after reception, by means of
bandpass filters. The CDU allows several dTRUs to share antennas. There is a
maximum of three CDUs in one RBS 2207.
The CDU distributes the received signal to several transceivers. The CDU
supports EDGE. Both CDU-G and CDU-J is used in the RBS 2207. CDU-G and
CDU-J can be configured either for high capacity or for high coverage. It is a
combiner that can be used for synthesizer hopping. To achieve capacity, the
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CDU uses the hybrid combiner in the dTRU. To achieve coverage, the CDU is
used in a configuration when the hybrid combiner in the dTRU is not used.
Number of units: 1 - 3
DCCU - DC Connection Unit
The DCCU distributes the incoming DC power supply voltages to the PSUs.
The unit also contains DC filter equipment.
Number of units: 0 - 1
dTRU - double Transceiver Unit
The dTRU contains two TRXs for transmission and reception of two radio
carriers. It has a built-in combiner with the optional possibility of combining two
TX signals into one TX output. It is also prepared for four-branch RX diversity,
for further improvements in sensitivity.
Number of units: 1 - 3
DXU-21 - Distribution Switch Unit
The DXU is the central control unit for the RBS. It supports the interface to the
BSC, and it collects and transmits alarms. The DXU controls the power and
climate equipment for the RBS. It has a removable compact flashcard, which
makes it possible to replace a faulty DXU without the need for loading RBS
software from the BSC. It can handle both 2 Mbit (E1) and 1.5 Mbit (T1) PCM
links.
Number of units: 1
FCU - Fan Control Unit
The FCU controls the four fans in the cooling system by regulating fan speed.
The FCU is controlled by the DXU.
Number of units: 1
IDM-02 - Internal Distribution Module
The IDM contains circuit breakers for distribution of the internal +24 V DC
power to the various units.
Number of units: 1
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PSU - Power Supply Units
The PSUs are available in two versions, PSU AC for connection to AC mains,
or PSU DC for connection to -48 to -60 V DC power supply. The PSU AC
converts 120 - 250 V to regulated +24 V DC. The PSU DC converts -48 to -60
V DC to regulated +24 V DC.
Number of units: 0 - 2
DC Filter
The DC filter unit is the interface for +24 V DC power supply or battery back-up.
Number of units: 0 - 1
5.2 Optional Hardware Units
This section describes the optional RBS 2207 hardware units.
Bias injector
The bias injector is used to provide the ddTMA with DC power, from the
TMA-CM, over the RX/TX feeder cables. Six bias injectors can be connected
to one TMA-CM. The BIAS-IC is mounted outside the cabinet, as close to the
RF output as possible.
Number of units: 0 - 6
BBS
The RBS 2207 can be provided with battery back-up from an external cabinet,
either a BBS 2000 or a BBS 2202 equipped with BFU-21 or BFU-22.
ddTMA - dual duplex Tower Mounted Amplifier
The ddTMA is to be mast-mounted and placed close to the antenna. It improves
the receiver sensitivity. The ddTMA saves feeder cables by duplexing RX and
TX signals to the same cable.
Number of units: 0 - 6
TMA-CM - Tower Mounted Amplifier - Control Module
The Control Module is used to provide up to six ddTMAs with 15 V DC power
through the bias injector. It is also used to identify TMA faults and forward this
information to the alarm module in the RBS.
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Number of units per cabinet: 0 - 1
6 Interfaces
In this section all external and internal connections are listed, as well as the test
interface and the operator interface.
DXU
d
T
R
U
d
T
R
U
d
T
R
U
CDU
CDU
PSU
FAN EPC-
bus
External alarms
ESB
Transmission lines
IOM-
bus
Y-links
P010923A
Optional BFU
CDU
OMT
GPS
Cabinet ID
TMA-CM (optional)
Figure 6 Block diagram showing internal power and signal paths
The connection field for external connectors is located at the top of the radio
cabinet inside the door. Internal connections, the test interface and operator
interface are located on some hardware units.
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6.1 External Connections
G703-1 G703-2 ACCU/DCCU FCU +24V DC
External Alarms
Antenna TMA-CM (optional)
GPS (optional)
ESB-2 (optional)
ESB-1 (optional)
P010955A
Figure 7 External connectors
Antenna feeders are directly connected to the CDUs. If bias injectors are used,
they are connected directly to the CDU and the antenna feeder is connected to
the bias injector.
Table 7 External connections
Connection Name Description Connector Type
CDU Feeder (and bias
injector) connection to
antennas
7-16 female connector
G703-1 Transmission Link 1 15-pin female, D-sub
G703-2 Transmission Link 2 15-pin female, D-sub
External Alarms External alarm inputs to
DF
37-pin female, D-sub
ESB-1 ESB to co-sited
cabinets
9-pin female, D-sub
ESB-2 ESB to co-sited
cabinets
9-pin female, D-sub
FCU RD Optical cable connector
from the BBS
Opto connector
FCU TD Optical cable connector
to the BBS
Opto connector
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Table 7 External connections
+24 V DC DC filter + connection Cable clamp
+24 V DC DC filter - connection Cable clamp
Earth Earth stud M8 to main
earth cable
M8 stud
ACCU 1 - 2 Mains connection to
PSU-AC 1 - 2
Screw terminal
DCCU 1 - 2 -48 V connection to
PSU-DC 1 - 2
Screw terminal
6.2 Test Interface
The Operation and Maintenance Tool (OMT) port is used to connect the OMT to
the RBS. A remote OMT can also be used from the BSC, which sends signals
over the Abis interface.
6.3 Operator Interface
The Man Machine Interface (MMI) in the RBS 2207 is based on visual indicators
and buttons located on the hardware units in the cabinet.
Internal Indicators
Battery mode Indicates that the RBS is running on
battery
RBS fault One or more faults are detected on
RUs in the RBS
EPC bus fault Indicates the state of the EPC bus
Ext alarm One or more supervised external
alarms are active
Fault Fault detected and localised to the
RU
Local mode The RU is in local mode
Operational The RU is operational
Test result Indicates the result of tests
Transmission OK Indicates state of transmission on
ports A - D
RF off RF not enabled
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Buttons
dTRU reset Resets the dTRU
DXU reset Resets all subunits
Local/remote mode Changes RU mode to local or remote
Test call Initiates the test operation function
Barcode
The barcode for product identification is readable without disturbing the RBS
function.
7 Power System
The power system of the RBS 2207 depends on the choice of power supply
and may include a number of units outside the RBS.
The RBS 2207 can be connected either to AC mains supply voltage or to DC
supply voltage.
Table 8 Power supply voltage alternatives
Nominal voltage PSU
120 - 250 V AC, 50 - 60 Hz PSU-AC
+24 V DC PSU not needed
-48 to -60 V DC PSU-DC
Note: It is mandatory that a readily accessible disconnect device is
incorporated in the fixed wiring. The disconnect device must disconnect
all live wires from the cabinet.
7.1 AC mains supply voltage
AC mains supply voltage is connected to the cabinet using two AC cables.
If the power supply does not meet the AC power requirements, then filters
and stabilisers must be installed to protect the equipment and ensure proper
operation.
There are two ways to connect power to the RBS. They are:
• Single phase line to neutral
• Single phase line to line
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Note: When single phase line to line is used, each PSU requires two circuit
breakers or fuses.
Table 9 AC mains power requirements
Voltage range for specified
Performance (phase voltage)
120 - 250 V AC
Voltage range 90 - 275 V AC (1)
Frequency 45 - 65 Hz
Inrush current, max. 30 A (1 - 30 ms)
Maximum AC power 1.4 kW x 2
Non-destructive range 0 - 275 V AC
Overvoltage <20 ms 325 V(2)
Maximum ground leakage current 10 mA x 2
(1) 1) 90 - 108 V AC with reduced output power. 1000 W per PSU
(2) 2) Install external filter and stabiliser if not met.
Mains Fuses
Table 10 Mains fuses recommendation
Minimum for Safe
Function
Recommended for
Maximum Selectivity
Maximum Allowed
Fuse Rating
2x10 A /16 A(1) 2x16 A 2x20 A
(1) 1) For 200 - 250 V range only.
External Earth Fault Circuit Breakers
If external earth fault (ground fault) circuit breakers are used, then the
recommended minimum trip value is 100 mA.
7.2 +24 V DC Supply Voltage
Table 11 DC power requirements
Nominal +24 V DC
Default +27.2 V DC
Range +20.5 to +29.0 V DC
Non-destructive range +0 to +32 V DC
Inrush current Max. 500 A (0.1 - 10 ms)
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Fuses
Table 12 +24 V DC fuse recommendation
Minimum for Safe
Function
Recommended for
Maximum Selectivity
Maximum Allowed
Fuse Rating
1x80 A(1) 1x100 A 1x200 A
(1) May be used when no transmission and/or optional equipment is installed.
7.3 -48 to -60 V DC Supply Voltage
Table 13 DC supply voltage requirements
Nominal -48 to -60 V DC
Range -40.0 to -72.0 V DC
Non-destructive range +0 to -80 V DC
Inrush current 200 A (0.1 - 5 ms)
Fuses
Table 14 -48 to -60 V DC fuse recommendation
Minimum for Safe
Function
Recommended for
Maximum Selectivity
Maximum Allowed
Fuse Rating
2x32 A 2x35 A 2x40 A
7.4 Battery Back-up
Battery back-up can be used to power the site during mains failure and to
protect the site from interruptions in the AC mains supply. It is available in an
external cabinet.
In the event of mains failure, the batteries in the BBS 2000 or BBS 2202
deliver the necessary power to the radio cabinet as well as to the transmission
equipment, if used. This enables the radio system to continue operating during
mains failure. The transmission equipment is provided with power supply
longer than the RBS.
Battery back-up can be delivered for at least 1, 2, 4, 6 or 8 hours back-up time,
depending on the chosen configuration of the RBS. The BBS can feed +24 V
DC or -48 V DC to transmission equipment. The -48 V DC supply requires an
internal DC/DC converter in the BBS. It is possible to share battery back-up
between an RBS 2202 or 2206 and an RBS 2207.
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