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Product Description.

RBS 2108 Product Description

xxxx Rev PA3 2005-09-06 © Ericsson. Commercial in confidence

Product Description 2 (19)

Contents1 INTRODUCTION......................................................................4

1.1 A NEW POWERFUL MEMBER OF THE RBS 2000 FAMILY. .41.2 RBS 2108 – COVERAGE WITH A COST-EFFECTIVE RBS.4

2 RBS 2108 ARCHITECTURE....................................................62.1 MU, MAIN UNIT............................................................62.2 RRU-N........................................................................72.3 RRU-C........................................................................72.4 SUNSHIELDS.................................................................82.5 CONNECTION BETWEEN MU AND RRU..........................8

3 OPTIONAL PRODUCTS..........................................................93.1 RXBP UNIT..................................................................93.2 COMBINER....................................................................93.3 EXTERNAL SPLITTER.....................................................93.4 BATTERY BACK-UP........................................................9

4 TECHNICAL SPECIFICATION..............................................104.1 OUTPUT POWER AND RECEIVER SENSITIVITY................104.2 MECHANICAL DIMENSIONS...........................................104.3 VOLUME AND WEIGHT.................................................104.4 POWER REQUIREMENTS..............................................114.5 POWER CONSUMPTION...............................................114.6 COLOUR.....................................................................114.7 CIPHERING.................................................................114.8 EXTERNAL ALARMS.....................................................114.9 TRANSMISSION...........................................................114.10 ELECTROMAGNETIC COMPATIBILITY (EMC)..................124.11 OTHER REQUIREMENTS..............................................12

5 CONFIGURATIONS, SINGLE BAND....................................145.1 RRU-N......................................................................145.2 RRU-C......................................................................14

6 DUAL BAND CONFIGURATIONS.........................................146.1 RRU-C......................................................................146.2 RRU-N......................................................................14

7 NOT SUPPORTED CONFIGURATIONS...............................158 Acronyms and Abbreviations..................................................16

© Ericsson. Commercial in confidence Rev PA3 2005-09-06 xxxx


Please note that this description includes details on both basic and optional products. It does not necessarily correspond to any specific release or delivery time, nor is it a complete technical specification.

Xxx Rev PA3 2005-09-06 © Ericsson. Commercial in confidence


1 IntroductionThe purpose of this document is to describe RBS 2108 that is a main remote RBS, which can be configured with one main unit (MU) and up to three radio units.

The radio unit can be based on sTRU (defined as C-RRU), developed for P-GSM 900, or based on dTRU (defined as N-RRU), developed for both P-GSM 900 and GSM 1800.

Up to three RRUs (either C-RRU or N-RRU) can be configured to one MU.

1.1 A new powerful member of the RBS 2000 familyThe RBS 2108 is a new member of the highly successful RBS 2000 family. This guarantees a world-class supply flow, fast installation and commissioning, reliable operation & maintenance

The RBS 2108 is an outdoor macro base station supporting up to six TRX with Remote Radio Unit N (RRU-N) or up to three TRX with Remote Radio Unit C (RRU-N). RBS 2108 cabinet can be installed on a wall, mast or pole.

RBS 2108 will be available for following frequencies:

Frequency

RRU type

P-GSM 900

RRU-C and RRU-N

GSM 1800

RRU-N

At the moment RBS 2108 is not planned to be developed for GSM 800 or GSM 1900. Depending on market demand it might however be possible to develop it for GSM 800 and/or GSM 1900.

1.2 RBS 2108 – Coverage with a cost-effective RBSEricsson’s GSM radio base station RBS 2108 facilitates coverage extension with a cost-effective low- and medium capacity RBS.

The RBS 2108 is optimised for the low capacity rural applications but can also be used for indoor coverage in e.g. shopping malls and offices with a main unit centralised in e.g. the cellar and distributed radio units for each floor or corridor.



For meeting the radio network requirements RBS 2108 comes in different configurations.

The MU and RRU and powered by 110-270 VAC. Optional Uninterrupted Power Supply (UPS) can be connected to the MU.

The silent operation of RBS 2108 is an important factor when obtaining site permission. Base-stations equipped with cooling fans make it harder to find sites in public places due to high noise levels produced by these base-stations. The fact that RBS 2108 is totally silent also reduces the risk of vandalism, as the site is less likely to attract attention from miscreants. RBS 2108 main features are:

Instant capacity up to 6 TRX (one main unit and three radio units) if using RRU-N or up to 3 TRX (one main unit and three radio units) if using RRU-C

Output power 43 dBm/carrier for RRU-N and 42 dBm for RRU-C Ready for EDGE and GPRS (CS-1 to CS-4) on all TRX Small and discreet design for both outdoor and indoor environmental Totally silent Temperature range:

MU: -33C to +50C RRU-N: -33C to +50C RRU-C: -33C to +45C

Easy and fast to install Modular building practise Integrated Transmission Interface Module for E1 SW support in BSS R? and BTS R? is required



2 RBS 2108 ArchitectureRBS 2108 is physically divided into two major units; MU (Main Unit) and remote radio unit. The remote radio unit can be either RRU-N (2 TRX) or RRU-C (1 TRX).Up to three remote units (either RRU-C or RRU-N) can be connected to one MU.RRU-C and RRU-N cannot be connected at the same time to the MU. However it is possible to start with RRU-C and expand when capacity need is increasing if required (or vice versa).The small size of RBS 2108 eases site acquisition and the modular building practice allows for a fast and easy installation. The MU cabinet is equipped with external interfaces, such as the Abis interface towards the BSC. The RBS 2108 include: Main Unit (MU), Remote Radio Unit (RRU-C or RRU-N) Sunshield Optical Y-link fibre

Figure 1, RBS 2108

2.1 MU, Main UnitMU provides a system interface to the 2 Mbit/s PCM link and cross connects individual time slots to certain transceivers. The MU also extracts the synchronisation information from the PCM link and


Antenna

RRU with dTRU

MU

AC and optical Y-link

AC 110-270 VAC


generates a timing reference for the RBS. The MU supports features such as LAPD Multiplexing, LAPD concentration and multi drop functionality.

Figure 2. MU

The MU includes: Support for up to 6 transceivers Connectors for the connection between the MU and the RRU-N (1 to

3 RRU-N) or RRU-C (1 to 3 RRU-C) Two E1 interfaces for transmission Connectors for OMT and external alarms Man Machine Interface, IXU-21

2.2 RRU-NThe small and compact RRU-N includes two TRX. The RRU-N is connected to the MU via an optical interface.

Figure 3. RRU-N

RRU-N is available for P-GSM 900 or GSM 1800.

The RRU-N is always equipped with two transceivers and they are all integrated in the RRU-N.



2.3 RRU-CThe small and compact RRU-C includes one TRX. The RRU-C is connected to the MU via an optical interface.

Figure 4. RRU-C

RRU-C is available only for P-GSM 900.

The RRU-C is always equipped with one transceiver and is all integrated in the RRU-C.

2.4 SunshieldsRRUC and RRU-N is delivered with sunshields in a discrete grey colour. For the MU the sunshield is an optional part then the MU can be installed in a 19” rack if needed.

2.5 Connection between MU and RRUBetween MU and RU there has to be an optical Y-link cable. The Y-link cable can be up to 500 meters.

Each RRU has to be AC powered by 110-270 VAC.

MU is AC powered by 110-270 VAC.


Antenna

AC and Y-link

RR

U

AC and transmission

RR

U

RR

U


3 Optional productsA number of different optional products are available for RBS 2108 and these are briefly described in the following chapters.

3.1 SplitterTo support 1+1 configuration with RRU-N, external splitter has to be used.


MU


3.2 Battery back-up


Antenna

RRU with dTRU

MU Optional batteryBack-up

AC and optical Y-link


Battery backup is available in an optional cabinet. There is two different battery back-ups supported:

1. UPS-S. UPS-S provides a short time battery back up for about 5-10 minutes. UPS-S is especially designed for RBS 2108 installed in e.g. shopping malls, airports where power failure is only short and it takes only a few minutes until a local generator has been started. UPS-S can only be installed indoor. UPS-S is prepared for transmission equipment (3 U). The UPS-S can be used either when using RRU-N or when using RRU-C.

2. UPS-N . UPS-N provides a long time battery back up for about 4 or 8 hours battery back for a RBS 2108 installed with RRU-N. Battery back-up time is chosen depending on number of batteries. UPS-N can only be installed in- and outdoor. UPS-N is prepared for transmission equipment (3 U).

3. UPS-C. UPS-C provides a long time battery back up for about 4 or 8 hours battery back for a RBS 2108 installed with RRU-C. Battery back-up time is chosen depending on number of batteries. UPS-C can only be installed in- and outdoor. UPS-C is prepared for transmission equipment (3 U).

Both back-up solutions has some common feature:

1. Prepared for 3 U transmission

2. Battery test

3. Priority power to transmission. If power in the UPS is below a specific level, power to transmission (or other external equipment) is prioritised before MU

4 Technical specification

4.1 Output power and Receiver sensitivityTable 1. Output power and Receiver sensitivity

Unit Output power (ARP)

Receiver sensitivity

RRU-N 43 dBm/carrier for P-GSM 900 and GSM 1800

-111 dBm???

RRU-C 42 dBm for P-GSM 900

-111 dBm??



4.2 Mechanical DimensionsTable 2. Mechanical Dimensions with sun shield

Width (mm)

Depth (mm)

Height (mm)

RBS 2108, MU 300 73 430RBS 2108 RRU-C 365 189 579RBS 2108 RRU-N ? ? ?

4.3 Volume and WeightTable 3. Volume and Weight with sun shieldUnit Volume

(l)Weight (kg) total

RBS 2108, Main Unit 20 ~9RBS 2108, RRU-C 40 ~25RBS 2108 RRU-N 45 <30

4.4 Power RequirementsTable 4. Power Requirements.Power Option110-270 VAC



4.5 RBS 2108 Power Consumption

RBS 2108 power consumption

Configuration

RRU type Typical power consumption no heater (W)

Typical power consumption with heater (W)*

1x2 RRU-N GSM 900 260 540

2x2 RRU-N GSM 900 510 990

3x2 RRU-N GSM 900 750 1430

1x2 RRU-N GSM 1800

300 580

2x2 RRU-N GSM 1800

580 1060

3x2 RRU-N GSM 1800

860 1540

1x1 RRU-C 140 420

2x1 RRU-C 260 740

3x1 RRU-C 380 1050

*) When the RBS is up and running , the heater is only switched on when the RBS 2108 is running in an environment where the temperature is about below –20C??

4.6 ColourTable 5. ColourColour Reference

NumberEricsson Number

Grey NCS 1002-R MZY 38320/9854.7 Ciphering

In the same hardware the RBS 2108 is ready for ciphering codes A5/1 and A5/2. The ciphering is configured via the BSC.



4.8 External AlarmsRBS 2108 provides connections for four external alarms. The external alarms are defined by the customer and are reported to the BSC via LAPD signalling on the A-bis O&M interface. The external alarms are defined by using the Operation and Maintenance Terminal (OMT) or the Remote OMT. The external device sets the alarm by either an open or closed condition.

4.9 Transmission

LAPD concentration and LAPD multiplexing can be used to increase the transmission resource efficiency.

E1 120 Ohm is connected to the RBS 2108 cabinet via a 15-pin DSUB connector. E1/75 Ohm is connected to the RBS 2108 via an optional adapter cable that includes an impedance converter with BNC connectors.

E1/G.703 offer multi vendor compatibility on the transmission level. E1/120 Ohm transmission support Long Haul. The long haul feature allows for 30 dB loss and a more cost efficient transmission network configuration. Normally E1/G.703 only offer short haul interfaces, enabling distances up to 6 dB loss.

Coaxial connection (75 Ohm) is only available for E1 operation and does not support long haul. The distance allowed between units is determined by the cable loss, according to the 6 dB receiver sensitivity specified in G.703.

4.10 Electromagnetic Compatibility (EMC)????

All RBS 2108 models fulfils the Electromagnetic Compatibility (EMC) requirements according to:

ETS 300 342-2, the BTS product standard, in line with the European EMC Directive 89/336/EEC.

1999/5/EC Radio and TTE directive

EN 55022 Class B?????

GSM:11.21

FCC, part 15?????

The RBS 2108 is CE marked in order to show this compliance.


Transmission (x4)

N(f) for TX1/RXA and TX2/RXB


4.11 Other Requirements????????

Product Safety

In accordance with the Low Voltage Directive (LVD 73/23/EEC plus 93/68/EEC) within the European Union the RBS 2108 models comply with the following requirements regarding product safety: EN 60 950/IEC 950 EN 60 215/IEC 215 EN 60 529/IEC 529

The RBS 2108 models are designed to fulfil the following safety standards in North America: UL 1950, 2nd Edition, “Information Technology Equipment Including

Electrical Business Equipment” CSA C22.2 No. 950-95, “Safety of Information Technology Equipment

Including Electrical Business Equipment”

The RBS 2108 models are CE marked and UL listed 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 2108 complies with ETS class 1.2 Weather Protected, Not Temperature Controlled Storage Locations in ETS 300 019-1-1.

Transportation Requirements

The RBS 2108 complies with ETS class 2.3 Public Transportation inETS 300 019-1-2.

Earthquake Protection

The RBS 2108 is designed to fulfil earthquake protection according to IEC 68-2-57.

In-Use Requirements

The RBS 2108 is designed for normal operation in the climate conditions of class 4.1 of IEC 721-3-4 (ETS 300 019-1-4). Temperature range: -33 ºC up to +50 ºC when using RRU-N, -33 ºC up to +45C when using RRU-C. Start up time is about 4 hours.



5 Configurations, single band

5.1 RRU-NWith RRU-N following configurations are supported

1x2

2x2

3x2

1x4

1x6

1+1 Highway coverage with one RRU-N with external splitter.

5.2 RRU-CWith RRU-C following configurations are supported

1x1

2x1

3x1

6 Dual Band configurations

6.1 RRU-CRRU-C is only developed for P-GSM 900.

6.2 RRU-NWhen using RRU-N dual band is supported by using RRU-N with different frequencies. Dual band within the same RRU-N is not supported.



7 Not supported configurationsIt is not possible to mix different types of RRUs to the same MU. That means only RRU-C or RRU-N can be configured to the MU at the same time.



8 Acronyms and Abbreviations


Description.

ACCU AC Connection UnitAO Application ObjectBCCH Broadcast Control ChannelBDM Battery Distribution ModuleBFU Battery Fuse UnitBSC Base Station ControllerBSS Base Station SystemBTS Base Transceiver StationCDU Combining and Distribution UnitCXU Configuration Switch UnitdB DecibeldBm Decibel relative to 1 milliwattDTX Discontinuous TransmissionDUPL DuplexDXU Distribution Switch UnitDXX digital cross-connectEACU External Alarm Connection Unit ECU Energy Control UnitECSD EDGE Circuit Switched DataEDGE Enhanced Data rates for Global

EvolutionEGPRS EDGE GPRSEMC Electromagnetic CompatibilityFCOMB Filter CombinerGMSK Gaussian Minimum Shift KeyingGPRS General Packet Radio ServicesGSM Global System for Mobile

CommunicationsHCOMB Hybrid CombinerHCS Hierarchical Cell StructureHSCSD High Speed Circuit Switched

DataHW HardwareIDB Installation Data BaseIDM Internal Distribution Modulekbit/s kilobits per secondkg kilogramkW kilowattl litrelb poundLAPD Link Access Protocol on

D-channelLED Light Emitting DiodeLTE Line Transmission EquipmentMbit/s Megabit per secondMCU Measuring Coupler Unit

mm millimetreMMI Man Machine InterfaceMO Managed ObjectMS Mobile StationMU Main UnitNMC Network Management Centre

O&M Operation and MaintenanceOML Operation and Maintenance LinkOMT Operation and Maintenance

TerminalOS Operating SystemOSS Operation Support SystemPC Personal ComputerPCM Pulse Code ModulationPSK Phase Shift KeyingPSTN Public Switched Telephone

NetworkPSU Power Supply UnitRBS Radio Base StationRX ReceiverRF Radio FrequencyRRU-C Remote Radio Unit with sTRURRU-N Remote Radio Unit with dTRURSL Radio Signalling Link

Replaceable UnitRU Replaceable UnitRXBP Receiver Band Pass FilterRXD Receiver DividerRXDA Receiver Divider AmplifierSDCCH Stand Alone Dedicated Control

ChannelSO Service ObjectSTC Signalling Terminal CentralTCH Traffic ChannelTDMA Time Division Multiple AccessTMA Tower Mounted AmplifierTRU Transceiver UnitTS Time SlotTX TransmitterTXBP Transmitter Band Bass FilterUPS Uninterrupted Power SupplyUPS-C Long time UPS for 2108 with

RRU-CUPS-N Long time UPS for 2108 with

RRU-NUPS-S Short time UPS for 2108VAC Volts, Alternating CurrentVDC Volts, Direct CurrentVSWR Voltage Standing Wave RatioW Watt

LRN/X-99:083 Rev pA2 1999-07-07 © Ericsson. Commercial in confidence

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