221 01-FGC 101 0066 Rev D
RBS 3418 Product Description
Commercial Product Description
RRU
Fiber
Main Unit
RBS 3418 Product Description
Contents
1
1.1
1.2
1.3
1.4
1.5
Introduction............................................................................................ 4
Main-Remote: the concept ...................................................................... 4
RBS 3418 Main-Remote: the benefits ..................................................... 5
RBS 3418 SW ......................................................................................... 8
RBS 3418 HW – Main Unit ...................................................................... 9
RBS 3418 HW – Remote Radio Unit ..................................................... 12
2
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
Technical Specification....................................................................... 17
Radio Specification................................................................................ 17
Mechanical Dimensions......................................................................... 18
Weight ................................................................................................... 19
Power Supply ........................................................................................ 19
Power Consumption .............................................................................. 20
Optical fiber lengths ............................................................................... 21
External interfaces ................................................................................. 21
Color ...................................................................................................... 22
Electromagnetic Compatibility (EMC) .................................................... 22
Environmental Specifications................................................................. 23
3
3.1
3.2
3.3
3.4
Configurations ..................................................................................... 26
RBS configurations ................................................................................ 26
Capacity................................................................................................. 26
Transmission ......................................................................................... 27
GPS ....................................................................................................... 27
4
4.1
4.2
4.3
4.4
Installation............................................................................................ 28
Main Unit ............................................................................................... 28
RRU ....................................................................................................... 28
Optical Interface Link (OIL) between Main Unit and RRU ..................... 28
Power supply options ............................................................................ 30
5
5.1
5.2
5.3
5.4
5.5
5.6
Operation and Maintenance................................................................ 36
General .................................................................................................. 36
Reliability ............................................................................................... 36
Live Expansion ...................................................................................... 36
Hot Repair Hardware Maintenance ....................................................... 37
RBS Element Management Principles .................................................. 37
Element Management Functions ........................................................... 38
6
Acronyms and Abbreviations............................................................. 40
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RBS 3418 Product Description
Ericsson AB 2007. All rights reserved.
The information in this document is the property of Ericsson.
The information in this document is subject to change without notice and Ericsson assumes
no responsibility for factual inaccuracies or typographical errors.
Except as specifically authorized in writing by Ericsson, the receiver of this document shall
keep the information contained herein confidential and shall protect the same in whole or in
part from disclosure and dissemination to third parties. Disclosure and disseminations to the
receiver's employees shall only be made on a strict need to know basis.
If trademarks or registered trademarks are mentioned, they are properties of their respective
owners.
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RBS 3418 Product Description
1
Introduction
The RBS 3418 is an indoor RBS in the powerful and flexible Main Remote family
from Ericsson. The RBS 3418 is specially made for mounting in 19” racks and the
RBS has a similar architecture as the other RBS 3000 products. The RBS can
provide macro coverage and/or in-building coverage for up to 6 sectors with 1 carrier
or up to 3 sectors with 2 carriers.
1.1
Main-Remote: the concept
The main-remote concept separates the traditional RBS cabinet into two distinct HW
entities. The radio specific HW for each sector is contained in a Remote Radio Unit
(RRU), which is designed to be located near the antenna. The rest of the RBS
(control, base band, switching and Iub interface parts) is contained in a Main Unit. A
thin optical fiber pair cable connects each RRU to the Main Unit.
Standard
Antenna/Feeder
Optical fiber
0 -15 km
Star or cascade
Remote
Wall, pole or tower top
No active cooling
Antenna tilt control
Main Unit 3418
Indoor: 19” rack in any cabinet
Figure 1. The RBS 3418 consisting of the Main Unit and up to six RRUs
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RBS 3418 Product Description
A traditional macro 3-sector site (below left) has a standard RBS cabinet (e.g. RBS
3202) plus 3 sector antennas. Two coaxial feeder cables (for RX diversity) are
needed to join each sector antenna to the RBS cabinet. TMA/ASCs may be installed
near the antenna to compensate for feeder loss on the uplink. With Main-Remote
(below right), the entire radio for a sector is placed near the corresponding antenna.
No TMA/ASCs are needed.
Sector
Antenna
Sector
Antenna
RRU
TMA/
ASC
Optical Fibers
Coax
Feeder
RBS 3418
Main Unit
mounted in
19” rack
Macro
RBS
Figure 2. A traditional Macro RBS compared with the Main-Remote
There are also other possibilities to install the Main-Remote concept. The Main Unit
can be included in the WCDMA Macro cabinets RBS 3206, RBS 3106 and RBS
3107. Another option is to install the Main Unit in an existing GSM cabinet (e.g.
RBS 2106) for smooth WCDMA installations for existing GSM operators.
1.2
RBS 3418 Main-Remote: the benefits
1.2.1
Lower CAPEX & OPEX
The RBS 3418 enables lower CAPEX and OPEX costs.
The CAPEX will be reduced compared to a traditional Macro site due to:
• Smaller or no additional footprint required, just install the Main Unit in an
existing 19” rack
• No traditional telecom room required.
• Smaller power supply and smaller battery back up required.
• No ASC/TMA required.
• Less installation costs with easy carry to site modules
This makes easier site acquisition feasible leading to faster network roll out and
faster revenues.
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RBS 3418 Product Description
An additional advantage for the Main Remote compared with a Micro or Pico base
station is the pooled capacity, where base band, control and transmission, are
shared between the sectors.
The OPEX will be reduced compared to a traditional Macro site due to:
• Reduced power consumption. Up to 40% less energy is required.
• Lower site rent.
• Less need for site cooling.
• When exchanging the batteries there will be fewer and less expensive
batteries.
1.2.2
No more feeder loss
Typical 3-sector macro sites require six thick coaxial feeders to connect the
antennas to the RBS cabinet. The loss of radio performance in the feeders is a
major issue, affecting both coverage and capacity. Longer feeders increase the loss.
While a TMA/ASC can compensate for feeder loss on the uplink, already at 30m a
7/8” feeder cuts output power (downlink) by ~35%.
Main-Remote solves the feeder loss problem completely by enabling the entire radio
to be placed adjacent to the antenna where it is connected through an optical fiber
to the Main Unit.
The output power efficiency gain from avoiding feeder loss in the Main-Remote
concept is used in RBS 3418 partly for radio performance gains, and partly to help
operators solve challenging site installation problems.
Since Main-Remote is ideal for sites with long feeder runs, the output power can be
reduced somewhat compared to a macro RBS, while still providing a sufficient level
at the antenna. Table 1 shows the break-even point lengths for a 7/8” feeder for
different powers from a traditional Macro RBS.
full
Output
power @
Macro 20/30 W
Main-Remote 10 W
1/2
1/4
1/8
.
.
.
break-even point
Distance to
antenna
Figure 3. Feeder lengths for a traditional Macro compared with Main-Remote
Table1. Break-even feeder (7/8”) lengths
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RBS 3418 Product Description
With
TMA/ASC
Without
TMA/ASC
20 W
32 m
38 m
30 W
59 m
65 m
In the calculations a feeder loss of 0.0629 dB/m for the 7/8” feeder has been used.
No feeder loss combined with the lower output power gives RBS 3418 much lower
power consumption than other macro RBS 3000 products. This leads to much
smaller and less heavy RRUs with increased MTBF, enabling easier antenna
placement as described below. The main unit is also small and light, providing a
solution for challenging sites. Furthermore, no thick feeders or TMA/ASCs are
needed when mounted alongside the antenna.
1.2.3
Easier antenna placement
With the Main-Remote concept, it becomes easier to place antennas at far greater
distances from each other, and from the main RBS cabinet (Main Unit).
This provides more antenna placement options, with two key benefits:
•
Simpler site acquisition process
•
More possibilities to optimize radio network coverage and minimize
interference
It is the lossless optical fiber link from each RRU to the Main Unit that enables the
long distances mentioned above, plus the small, lightweight RRU that can be placed
near the antenna.
Antennas with
RRUs optimally
placed
Main Unit conveniently
placed outside a building
Figure 4. An example of a Main-Remote application
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RBS 3418 Product Description
1.2.4
Solution for challenging sites
All RBS 3418 HW is specially designed to be small and light, easy to carry on site.
Traditional lifting equipment required for standard macro base stations is not
needed. The Main Unit can be installed in an existing 19” rack. This allows
installations in places too small for standard macro base stations, including spots to
which a larger/heavier macro RBS cannot be transported.
The indoor Main Unit can be located in an existing 19” sub-rack together with other
electrical equipment. In these cases its footprint is effectively zero.
RRUs can be installed close to the antenna, in the same way as a TMA or
Ericsson’s ASC. Normal jumper cables connect the RRU with the antenna. The
lower power consumption of RBS 3418 significantly reduces the size and weight of
traditionally large and heavy site power supply equipment.
The RRUs contains no fans and are practically silent. To summarize, the RBS 3418
provides an appealing solution for sites with limitations in one or more of the
following: space, floor load, access, power supply, noise.
1.2.5
Alternative solution for rural sites
A typical rural site needs high coverage, and hence antennas are often placed at the
top of a high mast (~ 40-80m) to improve the cell range. The macro RBS cabinet
must be placed at the bottom of the mast, because of its weight. Further coverage
gains are possible by choosing the highest output power configuration available
from a macro RBS, and using the thickest available feeders (1 5/8”) and TMA/ASCs
to somewhat offset the effects of feeder loss.
RBS 3418 offers an alternative-the RRUs are placed next to the antennas in the
mast and the Main Unit at the bottom of the mast in an existing rack. No thick
feeders or TMA/ASCs are needed.
The lower power consumption of RBS 3418 opens new possibilities for rural sites
such as using a diesel generator for the power supply, rather than having to install
electricity to the site. A diesel generator combined with Minilink (Ericsson’s
microwave Iub solution) would avoid many kilometers of power and Iub transmission
cable installation.
1.3
RBS 3418 SW
The RBS SW is based on the generic RBS 3000 application and platform SW
common for all RBS 3000 base stations. The SW is down loadable and is stored in
the non-volatile program store in the Main Unit.
The RBS 3000 family software platform provides basic support for the application
software and includes execution platform with operating system, ATM transport and
O&M infrastructure. RBS Application SW handles the RBS HW, and is built on the
Platform SW.
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RBS 3418 Product Description
1.4
RBS 3418 HW – Main Unit
The RBS 3418 Main Unit is designed for indoor environments in a 19” rack. It
contains the same HW boards as the other RBS 3000 products for base band,
control, switching and the Iub transmission interface functionality, described in the
next chapter below. These resources are pooled between the different sectors to
achieve high trunking efficiency. The RBS 3418 Main Unit supports configurations
up to 6x1 or 3x2.
Figure 5. The rack mounted RBS 3418
The RBS 3418 can be mounted in any 19” rack and is 4U high. This can be any
telecom rack, e.g. support cabinet. This could also be in a GSM RBS cabinet.
It is possible to connect different RRU types with different output power to the same
Main Unit. The Main Unit also supports dual band i.e. connection of different RRUs
for different frequency bands.
The Main Unit supports star connection of the RRUs. The Main Unit and the RRU 22
(see ref in 1.5.2 and 1.5.3) are also HW prepared for supporting cascading.
Cascading makes it possible to reduce the total length of fiber cable needed, which
can be interesting especially when the RRU 22s are located close to each other but
far away from the Main Unit. Three cascading chains are supported. A cascading
chain can contain up to six RRUs, with a maximum of six RRU 22s per Main Unit.
Cascading is planned to be commercially available by the end of 2007.
The Main Unit provides environmental protection and cooling via fans. It has
connections for the Iub interface, 6 optical links and external alarms. The power
options are 100-250 V AC, –48 V DC and +24 V DC.
1.4.1
Control Base Unit (CBU)
The CBU is the central control unit of the RBS. It executes the main part of the
control functions in the RBS and controls the boards via the board processors (BPs).
The CBU contains the ATM switch and interfaces to the other units in the sub-rack
via the backplane. The CBU board also contains power filtering and distribution for
the BB and Control sub-rack.
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RBS 3418 Product Description
The CBU also stabilizes the clock signal extracted from the transport network
connection or from the optional External GPS equipment. A number of timing signals
is created by the CBU and distributed to the rest of the RBS.
Four IMA capable E1/T1/J1 transport network ports are provided by the CBU. There
can be one CBU installed in the Main Unit.
1.4.2
Interface Boards (ETB)
The Exchange Terminal Boards (ETBs) provide optional transport network
connection ports. The use of ETBs is optional since the CBU already provides for
the most common transport network connectivity requirements.
An ETB comprises functions for interfacing the physical transport network line to the
RBS internal ATM switch. The number and type of ETB boards can be chosen for
different transmission standards and speeds. The number of boards can vary from
one up to four, which also makes it possible to configure the RBS as a transmission
hub.
The transport link interfaces are implemented as an integral part of the ATM
platform on which the RBS is based. The capacity of the links can be adapted to the
traffic bandwidth needs of each RBS and its role in the transport network.
Different transmission configurations can be designed to support different network
topologies. Cascading, star, tree and ring configurations can be used and combined
in any suitable structure.
The RBS can be configured as a transmission hub (concentrator) for ATM traffic
both with VC cross-connect and with AAL2 switching.
The transport network configuration is controlled via the Ericsson O&M System,
OSS-RC.
1.4.3
Base band in general
The amount of channel elements (CE) can be optimized to fit the current need
depending on the type of users and the amount of users using the different services.
Capacity for common channels and Softer Handover is provided built-in as standard
in addition to the specified traffic capacity. The capacity can be pooled over all
sectors, over carrier frequencies and, in the case of a dual band configuration, over
frequency bands.
A more detailed description of the base band units can be found in the document
“RBS 3000 Base band Product Description” (1/221 01-FGC 101 811).
1.4.4
Base band Random Access Receiver Board (RAXB)
The RAXB is divided in main functional units:
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RBS 3418 Product Description
•
Demodulator (DEM)
•
Random Access (RA)
•
Decoder (DEC)
•
Board Processor (BP)
The DEM comprises functionality for RAKE receiver, channel estimation and
maximum ratio combining (MRC). The RA comprises a random access detector.
The DEC module comprises functionality for de-interleaving and decoding.
Extra capacity is added by software keys and/or by adding more boards up to
maximum capacity. Redundancy is provided by load sharing between the RAXB.
Up to 5 RAXBs can be installed, or up to 4 RAXBs if an ET board is added.
Standard configurations are up to 3x2, 6x1 or 3x1+3x1 dual band support up to 4
RAXBs, i.e. up to 512 R99 channel elements for UL. Any of the RAXB slots can be
fitted with boards for either R99 traffic or boards for Enhanced Uplink (or boards for
a combination of both).
1.4.5
Base band Transmitter Board (TXB)
The TXB comprises functionality for:
•
Encoding (ENC)
•
Modulation and spreading (MOD)
•
Board Processor (BP)
Redundancy is provided by load sharing between the TXB. Up to 2 TXBs can be
installed. Standard configurations up to 3x2, 6x1 or 3x1+3x1 dual band support up
to 2 TXBs, i.e. up to 768 R99 DL channel elements. Any of the TXB slots can be
fitted with HSDPA capable HW, the HS-TX15 or HS-TX45. These HS boards
provide both HSDPA capacity and R99 capacity on the same board.
1.4.6
Optical Radio Unit Interface Board (OBIF)
The RBS 3418 Main Units also contain the OBIF2, which is the board that provides
the optical interfaces to the Remote Radio Units. There is one OBIF2 in the Main
Unit with capacity for up to 6 RRUs.
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RBS 3418 Product Description
1.5
RBS 3418 HW – Remote Radio Unit
Ericsson provides a family of RRUs for all applications from the small low power
RRU for in-building systems to the high power 2 carriers RRU for very large
coverage. Naturally it is possible to mix different RRU types to the same Main Unit
or Macro cabinet. Dual band configurations are also supported by connecting RRUs
for different frequency bands to the same Main Unit or Macro cabinet.
The RRUs contain most of the radio processing hardware. The main parts of the
RRU are the:
•
Filter Unit
•
TRX Board
•
Amplifier Board (AMPB)
•
Voltage converter
The RRUs are designed to be used without TMA/ASCs.
1.5.1
RRU Naming Nomenclature
The Ericsson RRUs have been named in the following way:
RRU AB CDE
Where:
1.5.2
A
Number of carriers DL
B
Number of carriers UL
C
Frequency band (DL part of the band)
D
The suffix is used, when necessary, to describe partial frequency band in
accordance with the 3GPP standard (see also Table 2 in chapter 2.1.1)
E
Output power
High Power 2 carrier RRU - RRU 22
The RRU 22, providing 1 carrier and 20 W nominal output power or 2 carriers and
10 W nominal output power is available for the following frequency bands:
• 2100 MHz (Band I)
• 1700/1800 MHz (Band IX)
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RBS 3418 Product Description
The RRU 22 is designed for both standard outdoors and mast-mounted
environments. It is one complete unit containing all radio functionality. The RRU 22
is powered with either –48 V DC or 90-275 V AC and supports Remote Electrical Tilt
(RET) of the antenna.
The RRU 22 is HW prepared for cascading. The optical interface is based on the
Common Public Radio Interface – CPRI, developed in cooperation with leading
vendors and openly published on the internet (http://www.cpri.info/).
It has connections for AC and DC power, two antenna jumpers (for RX diversity), the
RET and two optical links, one to the Main Unit and the other to the next RRU (when
using cascading).
Since no fans are required for cooling, the operation is silent. The power and optical
link connections are located at the bottom of the RRU.
Figure 6. The RRU 22 with and without sun shield and bottom view
1.5.3
Super High Power 2 carrier 40 W RRU 22
The RRU 22, providing 1 carrier and 40 W nominal output power or 2 carriers and
20 W nominal output power is available for the following frequency bands:
• 1900 MHz (Band II)
• 1700/2100 MHz (Band IV)
• 850 MHz (Band V)
The 40 W RRU 22 is designed for both for standard outdoors and mast close
environments. It supports the use of ASC/TMA between the RRU and the antenna.
It is one complete unit containing all radio functionality. The 40 W RRU 22 is
powered with either –48 V DC or 90-275 V AC and supports Remote Electrical Tilt
(RET) of the antenna, either controlled directly from the RRU or either from the ASC.
The 40 W RRU contains fans, located on the top, for optimal cooling.
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RBS 3418 Product Description
The 40 W RRU 22 is HW prepared for cascading. The optical interface is based on
the Common Public Radio Interface – CPRI, developed in cooperation with leading
vendors and openly published on the internet (http://www.cpri.info/)
It has connections for AC or DC power, two antenna jumpers/feeders (for RX
diversity), the RET and two optical links, one to the Main Unit and the other to the
next RRU (when using cascading). Thee 40 W RRU 22 supports the use of
ASC/TMA between the RRU and the antenna.
The power and optical link connections are located at the bottom of the RRU.
Figure 7. The RRU 22 for 40 W with and without sun shield and top view
A typical installation with the Super High Power RRU 22 would be to install the RRU
close to the mast foot, as shown in the figure below.
ASC/TMA
Optical Fiber
Feeder Cables
Figure 8. The Super High Power RRU 22 in a typical installation.
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RBS 3418 Product Description
1.5.4
Medium Power 1 carrier RRU - RRU 11 2110
The RRU 11 2110, providing 1 carrier and 10 W nominal output power for 2100
MHz, is designed for both standard outdoors and mast-mounted environments as
well as in-building applications. It is one complete unit containing all radio
functionality. The RRU is powered with –48 V DC and supports Remote Electrical
Tilt (RET) of the antenna.
It has connections for DC power, two antenna jumpers (for RX diversity), the RET
and the optical link to the Main Unit.
Since no fans are required for cooling, the operation is silent.
The DC power and optical link connections are located in a small, climate-protected
chamber at the bottom of the RRU.
Figure 9. The RRU 11 2110 connected to an antenna
1.5.5
Low power 1 carrier RRU – RRU 11 2103
The low power RRU, providing 1 carrier and 3 W nominal output power is designed
for in-building applications. For that reason the RRU is built for indoor environments.
It is one unit containing all radio functionality. The RRU is powered with 90-275 V
AC.
It has connections for AC power, two antenna jumpers (for RX diversity) and the
optical link to the Main Unit. Since no fans are required for cooling, the operation is
silent.
The RRU 11 2103 contains an internal antenna option.
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Figure 10. The Low power 3 W RRU
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RBS 3418 Product Description
2
Technical Specification
2.1
Radio Specification
The operating specifications of the radio equipment will comply with (meet or
exceed) the performance requirements specified in the 3GPP Technical
Specifications.
2.1.1
System data
Different versions of the RRU exist for different frequency bands.
Table 2. System data for each frequency band
Operating
band (MHz)
Receiver
(MHz)
Transmitter
(MHz)
Channel
bandwidth
(MHz)
Duplex
separation
(MHz)
RRU
Product
2100
(3GPP band I)
1920-1980
2110-2170
5
190
RRU 11 2110
RRU 11 2103
RRU 22 2120
1700/1800
(3GPP band IX)
1749,9-1784,9
1844,9-1879,9
5
95
RRU 22 18IX20
1700/2100
(3GPP band IV)
1710-1755
2110-2155
5
400
RRU 22 21IV40
1900
(3GPP band II)
1850-1910
1930-1990
5
80
RRU 22 1940
850
(3GPP band V)
824-849
869-894
5
45
RRU 22 0840
2.1.2
Transmitter
Table 3. Output power from the RRU
Max
RRU 11 2110
12,6 W (41.0 dBm)
RRU 22 2120
22.95 W (43.6 dBm)
RRU 22 1940
45.7 W (46.6 dBm)
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10 W (40.0 dBm)
20 W (43.0 dBm)
40 W (46.0 dBm)
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RBS 3418 Product Description
RRU 22 18IX20
RRU 22 21IV40
RRU 22 0840
RRU 11 2103
2.1.3
22.95 W (43.6 dBm)
45.7 W (46.6 dBm)
45.7 W (46.6 dBm)
3.8 W (35.8 dBm)
20 W (43.0 dBm)
40 W (46.0 dBm)
40 W (46.0 dBm)
3.0 W (34.8 dBm)
Receiver
Receiver sensitivity
The values below are static 12.2 kbps RBS reference sensitivity according to 3GPP
25.104 v3.10.0 with 2-way RX diversity measured at the antenna input port of the
RRU.
Table 4.Receiver sensitivity
RX sensitivity
Typical (dBm)
RRU 11 2110
-126.9
RRU 22 2120
-127.7
1
RRU 22 1940
-126.92
RRU 22 18IX20
-127.0
RRU 22 21IV40
-128.52
1
RRU 22 0840
-126.92
RRU 11 2103
-123.0
2.2
Mechanical Dimensions
Table 5. Mechanical Dimensions (without the optional sun shield for the RRUs)
Unit
Volume Height
(liters) mm (in)
Width
mm (in)
Depth
mm (in)
Main Unit 3418
22
176.7 (7) 4U 482.5 (17.7) 19” 270.8 (10.6)
RRU 11 21103
41
600 (23.7)
320 (12.6)
217 (8.5)
RRU 22 21204
24.5
410 (16.1)
334 (13.2)
176 (6.9)
RRU 22 18IX204 24.5
410 (16.1)
334 (13.2)
176 (6.9)
RRU 22 21IV405 33.3
514 (20.2)
334 (13.2)
176 (6.9)
RRU 22 19401,5
33.3
514 (20.2)
334 (13.2)
176 (6.9)
RRU 22 08405
33.3
514 (20.2)
334 (13.2)
176 (6.9)
1
Preliminary value
With and without ASC/TMA
3
The measures with sun shield and mounting bracket is 620 x 382 x 292 mm (H x W x D)
4
The measures with sun shield and mounting bracket is 470 x 365 x 257 mm (H x W x D)
5
The measures with sun shield and mounting bracket is 571 x 365 x 265 mm (H x W x D)
2
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RBS 3418 Product Description
RRU 11 21036
2.3
6,7
238 (9.4)
356 (14.0)
79 (3.1)
Weight
Table 6. Weight
Weight7 kg (lb)
Unit
Main Unit RBS 3418 20.5 (45)
2.4
RRU 11 2110
23 (51)
RRU 22 2120
19 (41)
RRU 22 18IX20
19 (41)
RRU 22 21IV40
24 (52)
RRU 22 1940
24 (52)
RRU 22 08401
24 (52)
RRU 11 2103
7 (16)
Power Supply
The Main Unit is powered with 100-250 V AC, –48 V DC or +24 V DC. The RRU 11
is powered with -48 V DC while the RRU 22 can be powered with either 100-250 V
AC or –48 V DC. The RRU 11 2103 can be powered with 100-250 V AC. The AC
power for all the products is single phase and both 50 and 60 Hz are supported.
Table 7. Power supply
6
Unit
Nominal
voltage
Operational
voltage range
Non-destructive
range
Maximum
current
Main Unit –
3418
-48 V DC /
100-250 V AC
-40 to –57 V DC /
90 to 275 V AC
0 to –60 V DC /
0 to 300 V AC
13 A8 /
6 A8
Main Unit –
3418
+24 V DC
+24 V DC
+24 V DC
26 A8
The measures with shield and mounting bracket is 268 x 415 x 98 mm (H x W x D)
7
Values for the RRUs are without solar shield. Weights with solar shield for the RRUs are 29 kg for the RRU 11
2110, 24 kg for RRU 22 xx20, 29 kg for RRU 22 xx40 and 8.5 kg for RRU 11 2103.
8
Including heater
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RBS 3418 Product Description
2.5
RRU 11 2110
-48 V DC
-35 to –57 V DC
0 to –60 V DC
5A
RRU 22 2120
-48 V DC /
100-250 V AC
-35 to –57 V DC /
90 to 275 V AC
0 to –60 V DC /
0 to 300 V AC
8A
RRU 22 18IX20
-48 V DC /
100-250 V AC
-35 to –57 V DC /
90 to 275 V AC
0 to –60 V DC /
0 to 300 V AC
8A
RRU 22 21IV20
-48 V DC /
100-250 V AC
-35 to –57 V DC /
90 to 275 V AC
0 to –60 V DC /
0 to 300 V AC
8A
RRU 22 1940
-48 V DC /
100-250 V AC
-35 to –57 V DC /
90 to 275 V AC
0 to –60 V DC /
0 to 300 V AC
8A
RRU 22 0840
-48 V DC /
100-250 V AC
-35 to –57 V DC /
90 to 275 V AC
0 to –60 V DC /
0 to 300 V AC
8A
RRU 11 2103
100-250 V AC
90 to 275 V AC
0 to 300 V AC
1A
Power Consumption
Table 8. Typical and Maximum Power Consumption by Configuration
Configuration
Typical Power
Consumption9
(W)
Maximum Power
Consumption10
(W)
Main Unit – 3418 (-48 V DC)
10011
130
Main Unit – 3418 (AC)
13011
160
Main Unit – 3418 (+24 V DC) 13011
160
RRU 11 2110
100
140
RRU 22 2120
140
180
RRU 22 18IX20
120
160
RRU 22 21IV40
220
360
RRU 22 1940
220
360
RRU 22 0840
220
360
9
The typical power consumption is at 40% traffic load.
The figures for the maximum power consumption are approximate values and state maximum power
consumption measured at 100% of max output power incl. HSDPA at +30º C.
11
The configuration consists of CBU, OBIF2, 1 RAXB and 1 TXB with HSDPA traffic.
10
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RBS 3418 Product Description
RRU 11 2103
2.6
40
80
Optical fiber lengths
The distance between the Main Unit and an RRU: max. 15 km (10 miles).
The air distance between two RRU sites: max 5 km (3 miles)
(for RRUs connected to the same Main Unit)
2.7
External interfaces
Table 9. External connector interfaces for Main Unit RBS 3418.
Function
Connector Type
No. of interfaces
Optical fiber links
LC pairs
6
External alarm
Push in/clamp in OVP 8 (inputs)
E1/T1/J1-ports
Push in/clamp in OVP 0-12
E1/T1/J1-ports 75 Ohm
Push in/clamp in OVP 0-8
STM-1 ports
Opto (MU)
0-2
Ethernet
Opto (LC)
0-1
Site LAN or Element Manager RJ-45
1
DC and AC power supply
Screw plinth
1
Grounding point
M8 thread
1
GPS
Push in/clamp in OVP 1
Table 10. External connector interfaces for RRU 11 2110.
External Interface
Connector Type No. of interfaces
Grounding point
Optical fiber link
-48V DC power supply
Antenna jumper
Remote Electrical Tilt
M8 thread
LC pair
Screw plinth
7/16”
DIN 4 (circular
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RBS 3418 Product Description
connector)
Table 11. External connector interfaces for all RRU 22 variants.
External Interface
Connector Type
No. of interfaces
Grounding point
Optical fiber link
DC and AC power supply
Antenna jumper
Remote Electrical Tilt
M8 thread
Outdoor ODC plug
Amphenol 91-632172-02P
7/16”
DIN 4 (circular
connector)
1
2
1
2
1
Table 12. External connector interfaces for RRU 11 2103.
External Interface Connector Type No. of interfaces
Grounding point
Optical fiber link
AC power supply
Antenna jumper
2.8
M8 thread
LC pair
Screw plinth
7/16”
1
1
1
2
Color
The Main Unit color is the same as for other RBS 3000 outdoor products, while the
RRU color is the same as for other Ericsson antenna near products.
Table 13. Color
2.9
Unit
Color
Reference Number
Ericsson Number
Main Unit 3418
Grey
TBD
LMY 9048153/2832
RRU 11 2110
Grey
NCS 2502-R
MZY 50901/8153
RRU 22 xx20
Grey
NCS 2502-R
MZY 50901/8153
RRU 22 xx40
Grey
NCS 2502-R
MZY 50901/8153
RRU 11 2103
Grey
NCS 1002-R
LMY 904985/38320
Electromagnetic Compatibility (EMC)
The RBS fulfils the Electromagnetic Compatibility (EMC) requirements according to:
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RBS 3418 Product Description
•
3GPP TS 25.113
•
EN 301 489-23
•
European EMC Directive 89/336/EEC
•
1999/5/EC Radio and TTE directive
•
FCC (CFR Title 47) Part 15, 22 and 24
The RBS is labeled in order to show this compliance.
2.10
Environmental Specifications
Product Safety
In accordance with the Low Voltage Directive (LVD 73/23/EEC plus 93/68/EEC)
within the European Union the RBS models comply with the following requirements
regarding product safety:
•
EN 60 950/IEC 950
•
EN 60 215/IEC 215
•
EN 60 529/IEC 529
North American Market:
•
Code of Federal Regulation 21 CFR 1040.10 and 1040.11
•
ANSI/UL 60 950-1 / CSA C22.2 No. 60950-1
The RBS models are labeled in order to show this compliance.
Environmental Requirements
The requirements for climatic/mechanical environment are based on ETSI standard
ETS 300 019 Classification of Environmental Conditions and IEC 721.
Storage Requirements
The RBS 3418 complies with ETS class 1.2 Weather Protected, Not Temperature
Controlled Storage Locations in ETS 300 019-1-1.
Transportation Requirements
The RBS 3418 complies with ETS class 2.3 Public Transportation in ETS 300 0191-2.
Earthquake Protection
Reliable function during seismic exposure: Test method according to IEC/EN 60
068-2-57.
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RBS 3418 Product Description
In-Use Requirements
The RRU 11 2110 is designed for normal operation in the climate conditions of class
4.1 of ETS 300 019-1-4 according to IEC/EN 721-3-4 (extended to 45º C).
The RRU 22 xx20 and RRU 22 xx40 are designed for normal operation in the
climate conditions of class 4.1 of ETS 300 019-1-4 according to IEC/EN 721-3-4
(extended to 50º C).
The Main Unit RBS 3418 is designed for normal operation in the climate conditions
of class 3.1 of ETS 300 019-1-3 according to IEC/EN 721-3-3 (extended to 50º C).
Table 14. MU and RRU Normal Operating Conditions
Normal Operation
Temperature12
Relative
Humidity
Absolute Humidity
Main Unit – RBS 3418
+5 to +50º C
5 to 85%
1 to 25 g/ m3
RRU 11 2110
-33 to +45º C
0 to 95%
0 to 60 g/m3
RRU 22 2120
-33 to +50º C
0 to 95%
0 to 60g/m3
RRU 22 18IX20
-33 to +50º C
0 to 95%
0 to 60g/m3
RRU 22 21IV40
-33 to +50º C
0 to 95%
0 to 60g/m3
RRU 22 1940
-33 to +50º C
0 to 95%
0 to 60g/m3
RRU 22 0840
-33 to +50º C
0 to 95%
0 to 60g/m3
RRU 11 2103
+5 to +40º C
5 to 85%
1 to 25 g/m3
Ingression
The RRU 11 2110 and all RRU 22 variants are protected for the ingression of water
and dust and fulfils the IP55 requirements according to the standard IEC/EN 60 529.
The indoor specified RRU 11 2103 is protected for the ingression of water and dust
and fulfils the IP20 requirements according to the standard IEC/EN 60 529.
Acoustic Noise
The acoustic noise power levels at full output power and measured according to ISO
3744 are:
Main Unit sound power level during operation: < 3.8 Bel LwA (at +25º C)
< 4.3 Bel LwA (at +40º C)
12
All temperatures for the outdoor units are specified to handle an additional solar radiation of 1120 W/m2
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RBS 3418 Product Description
The sound power level for the RRU 22 xx40 during operation13:
< 5.0 Bel LwA (at +25º C)
< 6.0 Bel LwA (at +40º C)
No acoustic noise from any of the RRU 11 2110, RRU 11 2103 or RRU 22 xx20.
13
Preliminary values
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RBS 3418 Product Description
3
Configurations
3.1
RBS configurations
The RBS 3418 can support up to six cell carriers. These can be configured as 6x1
(for all RRU types) or 3x2 (for the RRU 22 variants).
The RBS 3418 support a free mix of RRU types connected to the Main Unit.
The RBS 3418 supports dual band configurations by a free mix of RRU types for
any frequency band connected to the Main Unit.
3.2
Capacity
The RBS 3418 can be equipped with up to 2 TXB and 5 RAXB boards. One of the
RAXB positions can also be utilized by an additional transmission board (e.g.
Ethernet). If the additional transmission interface is installed, then the maximum
uplink is 4 RAXB boards.
Table 15.Maximum base band Capacity
Boards
Downlink 2 TXB
Uplink
Capacity (CE)
768
5 RAXB 640
The maximum number of available channel elements (CE) depends upon the
version of the TX and RAX boards. The actual number of available channel
elements is defined in steps of 16 UL/DL and controlled via SW keys in the standard
way.
The capacity is pooled over all sectors.
The RBS 3418 supports HSDPA and Enhanced Uplink (HSUPA).
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RBS 3418 Product Description
3.3
Transmission
There is one position (slot) available for (15 mm wide) transport network interface
boards (ET boards). Each transport network board occupies one slot. The central
control unit in the RBS, the CBU board, also contains 4 E1/T1/J1 ports.
The Main Units can be used as an end-RBS supporting the transmission types
available from a single 15mm wide ET board. In addition it is possible to use the
Main Unit to cascade transmission to other RBSs.
Table 16. Main Unit transmission interfaces.
Board
Name
Speed
Ports/
(Mbps)
Board
J1
1.5
8
ET-MC1
ET-M3
ET-M4
ETMC41s
T1
1.5
E1
2
J2
E3
T3
6
34
45
STM-1/OC-3c
155
Mega-link
155
Channelized
STM-1/OC-3
155
8
8
2
2
2
2
2
1
1
ET-PSW
3.4
Ethernet
100
Standards
Compliance
JT-G703/ JT-G704/
JT-I431a
ANSI-G.703/G.704
ETS 300 420
ITU G.703/G.
JT-G703/ JT-G704
ITU G.703/G.704
ANSI G.703/G.704
ANSI T1.105-1995
ITU I.432.2 G.703
ITU G.957
NTT (Mega-link)
ANSI T1.105-1995
ITU I.432.2 G.703
ITU G.957
ANSI T1.403
Bellcore TR-62411
ITU G.703, G.704,
G.706, G.732
802.3u, 802.1 Q/P
GPS
As an option the Main Unit can be connected to a GPS, used for timing
synchronization of the RBS.
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RBS 3418 Product Description
4
Installation
4.1
Main Unit
The Main Unit is small and light enough to be carried by two persons. If needed, the
relevant mounting attachment is first installed and then the Main Unit is connected to
this. The Main Unit can be wall, pole or 19” rack mounted.
The Main Unit must be installed upright in order for the fully specified temperature
range to be valid.
4.2
RRU
The RRU family is designed for installations close to the antenna, and can be wall or
pole mounted.
The RRU may be placed wherever convenient, i.e. behind, underneath or beside the
antenna, however not in the path of the antenna lobe. The RRU is small and light
enough to be carried by one person. First the relevant mounting attachment is
installed and then the RRU is connected to this.
The RRU 22 xx20 and RRU 11 2110 are convection cooled, allowing mounting up a
tower near to the antenna. The lack of feeder attenuation allows the 20 W RRU to
provide macro equivalent power levels. The RRU 22 xx40 contains fans for optimal
cooling. The mounting recommendation for these is close to the tower.
RRU 11 2103 can be installed using the internal antenna as an option. When using
external antennas the minimum distance between the different RRUs and the
antenna is 20cm.
The RRU must be installed vertically in order for the fully specified temperature
range to be valid.
Each link between the Main Unit and RRU requires its own optical fiber pair cable.
The most commonly installed single mode optical fiber (G.652) is used, enabling
long cable distances up to 15km. The maximum distance between two RRUs,
belonging to the same Main Unit, is 5 km. The optical fiber pair is bound into one
thin cable, typically only a few mm in diameter.
4.3
Optical Interface Link (OIL) between Main Unit and RRU
Optical fiber cables are required between the Main Unit and the RRUs. Depending
on configuration, for star configurations OIL single mode (G.652) optical fiber pair is
used, and for cascading configurations CPRI cables are used. In both cases, the
cable is thin and light (<4mm thick) with a short bending radius.
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RBS 3418 Product Description
The fiber lenght between the Main Unit and an RRU can be max. 15 km (10 miles),
and the air distance between two RRU sites, with RRUs that are connected to the
same Main Unit, can be max 5 km (3 miles).
4.3.1.1
New cable installation
One end is connected to the connection interface on the Main Unit and the other
end inserted into the RRU connection chamber.
A cable with prepared connectors of type given in Chapter 2 is recommended for
fast and reliable installation. When cutting cables on site, special equipment is
needed to ensure that the optical fiber remains clean.
4.3.1.2
Connection to optical fiber transmission network
For longer Main Unit-RRU distances, it may be convenient to use an already
installed single mode (G.652) optical fiber transmission network. Dark fiber is
sufficient for this purpose, as the Main Unit and the RRU supply everything else
needed to make the link work.
Typically, when a dark fiber network is installed, a large number of thin optical fiber
pair cables are laid in a 10-20cm wide pipe. A Main Unit-RRU link requires only one
dark fiber pair cable from the network.
Optical cables must be installed from the Main Unit and RRU to the dark fiber
network and then connected to a single fiber pair in the network. The connection is
normally made by the transmission operator via splicing or at already made
connection point (see below).
Main Unit
RRU
Dark fiber network
Optical
fiber
Optical
fiber
Figure 11. The RBS 3418 connected to a dark fiber network
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RBS 3418 Product Description
4.4
Power supply options
Ericsson can supply suitable power supply options for every application. Below,
some power supply options that provide complete power and battery backup
systems providing –48 V DC are described.
The PBC-02 is an outdoors power supply ideal for providing power for the RBS 3418
alone together with up to 3 outdoors located RRUs.
PBC-04 is an indoor power supply that can provide both a rack mounted RBS 3418
and up to 3 outdoors located RRUs with power and battery backup.
The power source for the RRUs may be located at a relatively large distance from
the RRU, if desired. This is due to the low power consumption of the RRU, which
leads to a relatively small current and hence small voltage drop in the DC power
cable. A simple 2-wire DC power cable connects the RRU to the power supply.
When the RRU is placed in a mast, a shielded DC power cable is recommended to
provide extra protection against lightning.
The required thickness of the DC power cable increases linearly with the distance
between the RRU and the power supply. At a distance of 100m, the thickness of the
DC power cable is ~5-7mm. With shielding, the thickness becomes ~10mm, still less
than half that of a standard 7/8” feeder.
100m is sufficient in many cases for the power supply to be placed indoors,
somewhere easily accessible, or to enable the same power supply to be shared with
other RRUs, the Main Unit and/or other electrical equipment as well.
4.4.1
Outdoor Power and Battery Backup System PBC-02
The PBC-02 DC power system is ideal to supply –48 V DC to Main Remote
installations in outdoors environments around the world.
PBC-02 provides security against AC power supply interruptions and the system
features a very flexible, easily scaleable battery backup solution.
The cabinet has a compact size and is designed for pole mount or wall mount
outdoors applications. Indoor usage is of course also possible. The system including
approved batteries is earthquake proof. To optimize the battery lifetime and backup
time the battery packs are temperature regulated.
Fans are not needed; the internal environment is control by self-convection. The
PBC-02 has four DC outputs for RBS, Remote Radio Units or transmission loads.
For greater backup times, the PBC-02 feature an add-on Battery Unit (BU). Up to
two BUs can be electrically connected to the PBC-02 Main Unit (MU). One BU can
be integrated with the MU for more compact mounting.
The communication with the RBS is performed via binary output connected to one
RBSs external input interface panel. The PBC-02 requires no specific RBS software.
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High-quality components with high MTBF ensure a problem-free operation. Both AC
input and all four DC outputs feature lighting protection. No maintenance required
except for exchange of batteries.
Figure 12. The Main Unit (left), the Main + Battery Unit (center), pole mounted Main
+ Battery Unit with a 2nd Battery Unit (right)
Table 17. Technical specification for Outdoor Power and Battery Backup System PBC-02
MECHANICAL
Dimensions (W x D x H)
Volume:
Weight:
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Main Unit (MU): Overall, excluding separate optional mounting fixtures:
450 x 220 x 570 mm ( 17,7 x 8,7 x 22,4 in)
Battery Unit (BU): Overall, excluding separate optional mounting
fixtures:
450 x 220 x 570 mm ( 17,7 x 8,7 x 22,4 in)
MU + BU Compact mount. 450 x 400 x 570 mm ( 17,7 x 15,7 x 22,4 in
)
MU: 43 liters
BU: 43 liters
Weights below excluding mandatory mounting plate and optional pole
bracket:
Fully equipped MU, including batteries: 43-45 kg( 95-99 lbs.)
Fully equipped MU, excluding batteries: 20-22 kg( 44-49 lbs.)
BU, including 2 battery sets: 65 kg (143 lbs.)
BU, excluding batteries: 19 kg (42 lbs.)
Additional weights:
Mandatory mounting plate: 9 kg (20 lbs.)
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RBS 3418 Product Description
Pole mount bracket:
Optional pole mount bracket: 2.6 kg (5.7 lbs.)
To allow mounting onto a ∅ 60 – 114 mm (2.4 – 4.5 in) pole
ELECTRICAL
AC Input
90 – 275 VAC
Input voltage:
45 – 65 Hz
Line frequency:
Non-destruction voltage:
Surge and transient protection:
Power factor:
Efficiency:
DC Output
Output voltage:
Output power:
Maximum number of connected
loads:
Surge and transient protection:
Battery Characteristics
Nominal voltage:
Battery capacity
Resulting backup and recharging
times:
ENVIRONMENTAL
Temperature range:
280 VAC Permanent
Integrated
> 0.9
87%-91 % (180 VAC and higher), 84%-88% (90 - 140 VAC)
Nominal: -54 VDC
Min-Max: -43.5 to –57.6 VDC
• 1 PSU: > 525 W (600W @ - 33 to +15 °C, -27.5 to 59 °F)
• 2 PSU: > 775 W (1200W @ - 33 to +15 °C, -27.5 to 59 °F)
4. The available output power is shared by the connected loads. Any
single output can support the full output power.
Integrated, all four outputs
-48 VDC
• MU: 48V/13 Ah
• MU + one BU: 48/26Ah or 48V/39 Ah
• MU + two BU: 48V/52Ah or 48V/65 Ah
The PBC-02 can operate without batteries connected, if merely AC/DC
conversion is required
RBS and configuration dependant. Please contact your local Ericsson
office for more information.
Normal operation: -33 to +45 °C (-27.4 to 113 °F)
Safe operation: -33 to +55 °C (-27.4 to 131 °F)
15 – 100 %
Relative humidity:
No fans, no noise
Audible noise level:
Safety:
Approval:
EMC:
Enclosure:
Earthquake:
EN 60950-1, UL 60950-1 / CSA C22.2 and IEC 60950-1
CE, UL
EN 300 386:2003, Telecom centers and non telecom centers
IP55
IEC 60721-2-6 Zone 4, according to IEC 60068-2-7 assuming proper
installation and usage of PBC 02 approved batteries and accessories
only.
Supervision and Control
One input. From another PBC-02 in series
Binary Alarm Input:
Binary Alarm Output:
LED indicators:
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One output. System(s) “OK” or “nOK”. System nOK comprises a
number of error modes.
Seven LEDs, indicating “normal operation”, “minor faults/information
codes” and lastly “major fault”
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RBS 3418 Product Description
4.4.2
Indoor Power and Battery Backup System PBC-04
The PBC-04 DC power system is designed to supply Ericsson Main-Remote
systems with –48 V DC in applications around the world.
PBC-04 provides security against AC power supply interruptions and the system
features a very flexible, easily scalable battery backup solution.
The PBC-04 is available in two versions, the floor-mounted and wall-mounted
versions.
The floor-mount cabinet comprises a complete power and battery backup system.
I.e., the cabinet houses both a power system core as well as a battery bank. The
system including approved batteries is earthquake proof.
The wall-mounted power system can be connected to a separate battery set located
nearby.
The PBC-04 has nine DC outputs for RBS, Remote Radio Units and transmission
loads. Six DC outputs feature lightning protection, to support outdoor positioned
Radio Remote Units.
Up to three rectifiers can be housed in the system, reaching a maximum output
power of 4.8 kW.
The communication with the RBS is performed via binary output connected to one
RBSs external input interface panel.
Local access to the system’s integrated supervision and control system is provided
via the Laptop interface.
The temperature controlled fan system provides efficient cooling at a minimum of
sound. Installation in office and apartment buildings is therefore possible.
The system requires no specific RBS software.
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RBS 3418 Product Description
Figure 13. The Floor-mounted version of the PBC-04
Table 18. Technical specification for Indoor Power and Battery Backup System PBC-04
MECHANICAL
Dimensions (W x D x H)
Weight:
Floor mount cabinet:
600 x 400 x 1000 mm (23.6 x 15.8 x 39.4 in)
Wall-mount cabinet (excl. battery compartment):
600 x 350 x 400 mm (23.6 x 13.8 x 15.8 in)
Fully equipped Floor mount cabinet, excluding batteries: 54 kg( 119 lbs.)
Battery weight, 48V/100 Ah: 144 kg( 317 lbs.)
Fully equipped wall mount cabinet: 196 kg (431 lbs.)
ELECTRICAL
AC Input
Input voltage:
Line frequency:
Non-destruction voltage:
Surge and transient protection:
Power factor:
Efficiency:
DC Output
Output voltage:
Output power:
Maximum number of connected loads:
Surge and transient protection:
Battery Characteristics
90 – 275 V AC
45 – 65 Hz
0 – 325 V AC
Integrated. Standard: 6 kV @ 8/20 µS; Recommended option: ±15 kA @10/350 µs
> 0.98 (typical)
> 93 %
Nominal: -54 V DC
Min-Max: -45 to – 56 V DC
Max. 4800 W (with 3 rectifiers)
Nine
Integrated for six of the nine DC outputs (to support outdoor installed units)
Nominal voltage:
-48 VDC
Battery capacity
•
Floor-mount cabinet: 48V/100 and 48V/200Ah
•
Wall-mount: Maximum 48V/200 Ah can be connected (2 x 100 Ah)
RBS and configuration dependant. Please contact your local Ericsson office for more
information.
Resulting backup and recharging times:
ENVIRONMENTAL
Temperature range:
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Normal operation: 5 to +45 °C (-14 to 113 °F)
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RBS 3418 Product Description
Relative humidity:
15 – 95 %, non-condensing
Audible noise level:
Safety:
EN 60950-1, UL 60950-1 / CSA C22.2 and IEC 60950-1
Approval:
CE, UL
< 65 dB(A), Sound Pressure at 1 meter
EMC:
EN 300 386:2003, Telecom centers and non telecom centers
Enclosure:
IP20
Earthquake:
IEC 60721-2-6 Zone 4, according to IEC 60068-2-7 assuming proper installation and
usage of PBC 04 approved batteries and accessories only.
SUPERVION AND CONTROL
Binary Alarm Input:
4 inputs – Configurable via PC/Laptop
Binary Alarm Output:
4 alarm outputs ( 2A Form C Relay)
LED indicators:
3 LEDs per rectifier, 3 LEDs on the system controller
Laptop interface:
RS232
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RBS 3418 Product Description
5
5.1
Operation and Maintenance
General
Many aspects of O&M for RBS 3418 are similar to other members of the RBS 3000
family. Element management, fault handling, security, performance management
and configuration management all follow the general principles for the RBS 3000
product family.
The Main Unit is the main hub for O&M activities. RBS software is downloaded into
the Main Unit, from which relevant parts are then automatically downloaded into the
RRUs. External alarms can be connected to the Main Unit. The Main Unit has a
RJ45 Ethernet connection that can be used for a site LAN or to connect the element
manager on site. The Main Unit provides transparent IP access for supervision from
OSS-RC and the NMS.
5.2
Reliability
Since the RRUs may be installed in locations difficult to access, they are designed
to require minimal attention on site. The RRU 22 contains a minimum of hardware,
interfaces and no moving parts such as fans, enabling a high MTBF and avoiding
the need for preventative maintenance.
Standard, reliable optical transceivers are used for the optical link. By using prefabricated connectors on the optical cables (see below) high reliability can be
achieved.
Fault handling and supervision of the RRUs and optical link is performed so that the
operator can diagnose faults in the vast majority of cases without having to visit the
RRU site or inspect the optical link.
The Main Unit contains a minimum of boards and hence its reliability is similar to a
sub-equipped base band sub rack.
5.3
Live Expansion
Expansion of the RBS capacity is achieved by the addition of plug-in unit boards. An
expansion can be done without shutting down power or disturbing the live traffic.
However, a restart may be necessary to bring the expanded capacity into service in
some cases.
The Equipment Configuration Wizard within the Element Manager is used for the
expansion of new hardware. The operator specifies the new expansion through a
graphical user interface, and the RBS verifies that the proper hardware is installed.
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The live-expansion and Equipment Configuration Wizard principles allow quick and
simple expansion.
5.4
Hot Repair Hardware Maintenance
The Hot-repair support facilitates a faulty unit being replaced with minimum impact
to traffic.
The hot-repair principle allows a faulty board to be removed and replaced without
affecting other boards or functionality in the RBS. The board is blocked and then deblocked before the board can be brought into service. Start-up test of the newly
inserted board is carried out automatically before the board is taken into service,
without the need for operator intervention.
5.5
RBS Element Management Principles
The Embedded Element Management is implemented in the network element within
the RBS. This means that the network element contains all functions for selfmanagement. All software necessary for management of a network element,
including graphical user interfaces and documentation are accessible from via the
network element itself.
5.5.1
Accessibility
A “thin client” is required, which is an off-the-shelf commercial computer with a Java
Virtual Machine and a web browser installed (standard software). The web browser
starts the embedded Element Manager, from which all other graphical user
interfaces can be accessed.
5.5.2
Security
The Security Management solution provides security on the Application Layer.
Cornerstones of Application Layer security are user authentication and access
control (to verify that a user is authorized to perform a certain operation on a certain
target at a given time). Single logon is one main feature in the Security Management
solution. Single logon implies that the operator will only have to go through a
security logon procedure once after sitting down for a suite of O&M tasks in the
WCDMA RAN network.
The authorization mechanism is based on roles where the security administrator can
define roles and attach/detach users to these roles. Roles are associated with
privileges, such as a resource or a group of resources and an operation or a set of
operations that the role is authorized to perform on those resources. In addition to
this conditional constraints can be set, e.g. at what time of day and week a user is
authorized to work.
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5.6
Element Management Functions
5.6.1
Start & Restart
Start and restart functions apply to both complete and partial parts of the RBS,
including a restart escalating recovery function.
5.6.2
State Handling
With the lock function a user may prohibit usage of and cease alarms for a resource
upon which maintenance shall be performed. With the Unlock function the user may
take the resource into operation again when the maintenance is finished.
A typical usage is if the user wishes to replace equipment (for example a board).
The user locks the equipment to take it out of traffic and to cease alarms during
replacement, replaces it and unlocks it to take it into traffic again.
5.6.3
Fault and Test Management
Included in the system there are built-in self-tests and built-in supervision to verify
and supervise the hardware.
All alarms are logged in the base station in an Active alarm list and stored in an
alarm log. They can be remotely or locally accessed via the Element Manager, or
remotely via OSS-RC. In each alarm there is unambiguous information that
pinpoints a Plug-In-Unit (replaceable unit). There is an Operation Procedure
documentation on-line connected to each alarm with suggested repair actions.
These can be viewed from the Element Manager.
5.6.4
Software Management
The software management feature allows the operator to install an Upgrade
Package (UP) on a node and upgrade the node.
All new or changed software is transferred as an Upgrade Package (UP) to the
node.
Four different types of UPs exist:
•
Major package; contains new major functionality,
•
Maintenance packages; contains some new functionality and improvements,
•
Correction packages; contains planned fault corrections,
•
Emergency Corrections.
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The installation phase includes transfer of the UP from a central placed FTP server
and installation of it on the flash disc in the node. The upgrade phase includes
activation of the installed software.
5.6.5
Configuration Management
The configuration of the nodes is divided into three different layers: the equipment
layer, the transport network layer and the radio network layer. The principle used is
that the equipment configuration shall, to as large an extent as possible, be set in
factory or managed by the element management functions. Support for configuring
the transport network and the radio network parts are both functions in the element
manager and OSS-RC.
The Equipment Configuration Wizard and other wizards guide the operator through
the configuration of the RBS and site specific data.
Configuration data is provided with default values. It is included as a part of the
software delivery package.
5.6.6
External Alarms
The External Alarm administration provides the means to issue alarms for
equipment not included in the RAN product portfolio. Units outside the managed
system generate external alarms, for example, from burglar, temperature and
sensor alarms.
5.6.7
External Control
External output ports are provided for control of external site equipment, for
example, site access door latch. This is an optional functionality provided via XALM.
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6
Acronyms and Abbreviations
3GPP
AC
ASC
ATM
CAPEX
CBU
CE
CPRI
dBm
DC
DL
EMC
ETB
HP
HSDPA
HW
IMA
MTBF
NMS
OBIF
O&M
OPEX
OSS-RC
OVP
RAN
RANOS
RAXB
RBS
RET
RF
RRU
RX
SP
STM
SW
TMA
TXB
TX
UL
UP
VAC
VDC
WCDMA
XALM
3rd Generation Partnership Project
Alternating Current
Antenna System Controller
Asynchronous Transfer Mode
Capital Expenditure
Control Base Unit
Channel Elements
Common Public Radio Interface
Decibel relative to 1 mW
Direct Current
Downlink
Electromagnetic Compatibility
Exchange Terminal Board
High Power
High Speed Downlink Packet Access
Hardware
Inversed Multiplexing of ATM
Mean Time Between Failures
Network Management System
Optical Base band InterFace Board
Operation and Maintenance
Operational Expenditure
Operation Support System – Radio & Core
Over Voltage Protection
Radio Access Network
RAN Operation Support
Random Access and receiver Board
Radio Base Station
Remote Electrical antenna Tilt
Radio Frequency
Remote Radio Unit
Receive
Standard Power
Synchronous Transfer Mode
Software
Tower Mounted Amplifier
Base band Transmitter Board
Transmit
Uplink
Upgrade Package
Volts, Alternating Current
Volts, Direct Current
Wideband Code Division Multiple Access
External Alarm Module
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