GSM RBS Maintenance Course

LZU 108 5741 Uen Rev 2A GSM RBS 2106/2206/2207 Maintenance2002-10-31 1

GSM GSM RBS RBS 21062106/2/2220606/2207/2207

MaintenanceMaintenance CourseCourse

Course Agenda

• Introduction• GSM/BSS Overview• RBS Functional Overview• Site Equipment Technical Data• RBS Configurations

• Antenna Test• Installation and Integration• OMT Introduction• Maintenance Procedures

• Maintenance Exercises• Maintenance Cases• Course Summary

Course ObjectivesCourse ObjectivesAfter the end of the course you will be able to:• Understand the RBS 2106/2206/2207 functional build-up• Understand the RBS 2106/2206/2207 configurations• Know the RBS 2106/2206/2207 Product Data• Perform Corrective Maintenance Actions on RBS 2106/2206/2207 and the Antenna System• Perform Preventive Maintenance Routines on RBS 2106/2206/2207 and the Antenna

System

RBS 2106/2206 Installation

4 days

Antenna Installation

3 days

RBS 2106/2206 Site Test 3 days

Mini-Link Installation

3 days

RBS 2106/2206 Installation Delta

1 days

RBS 2106/2206/2207 Maintenance Delta

2 days

RBS 2106/2206/2207

Maintenance3 days

RBS Courses

Customer Product Information, CPI, examples

Course Agenda• Introduction• GSM/BSS Overview• RBS Functional Overview• Site Equipment Technical Data• RBS Configurations

•Link Access Protocol on D-channel LAPD configuration

•Un-concentrated 3 PCM-timeslot/TRU => 10 TRU/PCM-link

•Concentration 2,25 PCM-timeslot/TRU=> 13 TRU/PCM-link

•Multiplexing 2 PCM-timeslot/TRU => 15 TRU/PCM-link (max 2 TRU/cell )

BSS - Transmission solutions on Abis interface

• Cascading

• TG sync. RBS200/2102/2202/2106/2206 and 2102/2202/2106/2206 in the same cell.

• Master / Extension

RBS RBS RBS

RBS2106/2206

RBS2102/2202/M

RBS2102/2202/E

PCM configurations

RBS 2106

• Outdoor Cabinet• Temperature (-33°C up to +45°C)• Size: 1617 x 1300 x 925 mm• Weight: 685 kg with batteries• AC Input Power: max 6600W, 230 VAC• Transmission 75/120/100 ohm• Capacity of 12 transceivers• GSM 800, GSM 900, GSM 1800 or

GSM 1900• Output power: 45 dBm 900 MHz, • 44 dBm 1800 MHz• Sensitivity –111 dBm• Weatherproof/vandalproof design• Integrated 1 hour power backup

or external battery cabinet, optional• 16 External alarm inputs, optional

RBS 2206

• Indoor design• Temperature: +5°C up to +40°C• Size: 1850 x 600 x 400 mm• Weight: 230 kg• Power Input: 110-230 VAC, -72--39 VDC , +24

VDC• External power backup with up to 8h of battery

backup• Power Consumption: max 3200/5700 W with AC

Voltage• Normal sound power: 58 dB• Transmission 75/120/100 ohm• Capacity of 12 transceivers• GSM 800, GSM 900, GSM 1800 or GSM 1900• Output power: max 45,5 dBm 900 MHz, 44,5

dBm 1800 MHz• Sensitivity –111,5 dBm• 16 External alarm inputs• Optical indicators on the door on early versions

RBS 2207

• Indoor design• Size: 1300 x 600 x 400mm• Weight: 170 kg• Power input: 230VAC, +24VDC, -72 --39

VDC• Power consumption: 1000 W• Capacity of 6 transceivers• GSM 800, GSM 900, GSM 1800 or GSM

1900• Tx power: 45.5 dBm , TCC 48 dBm• Rx sensitivity: -111.5 dBm with TMA

-116 dBm with 2-div

MCPA Fan

RBS 2106RBS 2206

RBS 2106/2206 Replaceable Unit Overview

OMTInterface

PCM APCM B

PCM CPCM D

External Alarms(16)

ESB(TG Sync)

Mains Supply

BFU BatteriesFCUFans

Air Conditioning

AC Connection BoxEPC Bus

RBS 2106 Hardware overview

OMTInterface

PCM APCM B

PCM CPCM D

External Alarms(16)

ESB(TG Sync)

Mains Supply

EPC Bus

RBS 2206 Hardware overview

OMTInterface

PCM APCM B

PCM CPCM D

External Alarms(16)

ESB(TG Sync)

Mains Supply

EPC Bus

RBS 2207 – Hardware Overview

•Ready for EDGE

•High throughput (max 13Mb/s)

•Replaces Timing Bus, Local Bus and X Bus

•New point-to-point interface between DXU & TRUs

•Based on LVDS, Low Voltage Differential Signalling) interface

•Backplane connector on DXU with compatibility of 2102/2202 cabinets

•Each dTRU has two Y links (one for each transciver)

•Each Y link is divided into two interfaces:

• Y1: TX control data

TX burst data (X Bus data)

• Y2: Traffic data UL & DL

O&M Data

Timing

Y 7-12

Y-Links

• Optical Cable Bus

• Replaces Power Communication Loop

• Connects DXU to PSU’s, BFU and FCU for RBS 2206

• Connects DXU to PSU’s, BFU, FCU, A/C and ACCU for RBS 2106

• Bitrate min. 40 Kb/s

• Advanteges: provides galvanic isolation between units protected from EMI

Environment & Power Control, EPC, Bus

CDU-Tx ControlBus A

CDU-Tx ControlBus B

CDU-Tx ControlBus C

IOM Bus A

IOM Bus B

IOM Bus C

OXU 4OXU 3

OXU 2OXU 1

Backplane(Cabinet)Memory

CDU Buses

•Consists of 2 Buses: CDU-TX Control Bus and IOM Bus

CDU-TX Control Bus

• one RS-485 interface

• Links CDU with dTRUs

• Sends VSWR measurements

• Responsible for Combiner Control (CDU F)

IOM Bus

• Consists of three I2C Interfaces

• Links DXU, CDUs, CXU, OXUs as well as Backplane (Cabinet) memory

• Responsible for RX supervision in CDUs, including temperature, LED, cable & LNA supervision in CDU

• Responsible for crossconnection & cable supervision in CXU

CDU Bus

ConditionMinimum

Temperature

Maximum Temperature

Transport -40°C 70°C

Storage -25°C 55°C

Normal Operation(2206/2207)

5°C 40°C

Normal Operation(2106 wo. A/C)

-33°C 40°C

Normal Operation(2106 w. A/C)

-33°C45°C

Temperature Conditions

• 4 fans located on the top of the cabinet

• One FCU (Fan Control Unit)

• Temperature sensors in DXU, TRU, CDU & PSU

• Climate supervision performed by DXU

• fans 1 & 2 cool DXU-PSU rack

• fans 3 & 4 cool CDUs and dTRUs

• Normal and Desired Temperature Range

Climate System RBS 2106

•Internal Airflow goes through center fan, heat exchanger, heater and evaporator

• External Airflow passes through left fan and heat exchanger

• The right fan is used to exchange heat from the condenser & compressor

• CCU (Climate Control Unit) communicates with the DXU over EPC Bus and controls the entire system

Combined Climate Unit

• Internal Airflow goes through center fan, heat exchanger, heater and evaporator

• External Airflow passes through left fan and Heat Exchanger

• The right fan is used to exchange heat from the condenser & compressor

• CCU (Climate Control Unit) communicates with the DXU over EPC Bus and controls the entire system

EPC BusCombined Climate Unit

• 4 fans located on the top of the cabinet

• One FCU (Fan Control Unit)

• Temperature sensors in DXU, TRU, CDU & PSU

• Climate supervision performed by DXU

• All fans work together, but:

fans 1 & 4 mainly cool DXU-PSU rack

fans 2 & 3 mainly cool CDUs and dTRUs

• Normal and Desired Temperature Range

Climate System RBS 2206

GSM 900: 1x8

GSM 900

GSM 1800: 1x4

GSM 1800

Dual Band

• allows to synchronize up to 2 RBSes to work in the same cell•1/1 frequency network•128 trx•64 TGs

Transceiver Group Synchronization

• The transmission interface: - Supporting four 2 Mbit E1 or 1.5Mbit T1 ports - Total Capacity of up to 8 Mbit/s Abis transmission

• Removable Flash Card for easy load of BTS SW

• Support for External Synchronization Bus, ESB

• Built in indoor EC-functionality (No need for ECU in RBS 2x06)

• HW Prepared to support EDGE modulation on up to 12 TRXs

Distribution Switch Unit, DXU 21

DXU 21 Block diagram

• Two transceivers in one unit of the same size as the current single TRU

• Two versions, one for GMSK only and one for 8-PSK (EDGE) and GMSK

• Four versions with frequency bands GSM 800, E-GSM 900, GSM 1800, or GSM 1900

• Built in by-passable hybrid for TX combining together with CDU-G

• Supports Software Power Boost

•Automatic selection of correct ciphering algorithm A5/1 or A5/2

• HW Prepared to support:- Extended Range (2 slot, 121 km) - Four-branch RX Diversity

Double Transceiver Unit, dTRU

dTRU Block Diagram

• FC – Filter Combiner

• CC – Combiner Controller

• MR – Measurement Receiver

• DPX – Duplex Filter

• CNU – Combiner Network Unit

• MCU – Measurement Coupler Unit

• LNA – Low Noise Amplifier

• RxBP – Rx Band Pass Filter

• TxLP – Tx Low Pass Filter

Only for RBS 2207

Look-a-like CDU G

• Frequency independent

• Distributes RX from the CDUs to the dTRUs

• Built up with SW controlled switches

• Makes it possible to expand and reconfigure a RBS 2x06 without moving or replacing any RX cables, almost.

• Only one set of RX cables to cover all configurations

• Only one type of CXU to cover all configurations with CDU-F, CDU-G

Connection Switch Unit, CXU

CXU 10 Block Diagram

• Located between CDU and CXU

• Function of the ASU is to take a small portion of the RX signal and send it to the co-sited RBS

• Switches the attenuation in accordance with whether or not a TMA is used. It also indicates the attenuation state via a LED.

• The ASU has the following connectors:

six input ports for RX signals from the CDU

six output ports for RX signals to the CXU

six output ports for RX signals to the co-sited RBS

power supply connector.

ASU – Antenna Sharing Unit

Hybrid Combiner Unit, HCU

• Maximum 5 OXUs

• OXU 1-4 located in the DXU-PSU rack

• OXU 5 is the Antenna Sharing Unit above the CXUs

• OXUs:

• TMA Control Module

• 2 card DXX (max 8 PCM ports)

• 1 card DXX (max 4 PCM ports)

• MiniDXC (5 PCM ports)

• Antenna Sharing Unit, ASU

• Hybrid Combiner Unit, HCU

Optional eXpansion Units, OXU

Input voltage 120 – 250 VPower Consumption 1446 VA MaxHeat Generation246 W

PSU AC

PSU AC Block Diagram

Input voltage –72 – 39 VPower Consumption 1411 WHeat Generation211 W

PSU DC

PSU DC Block Diagram

RBS 2206 Connection Fields

Alternating Current Connection UnitACCU

Direct Current Connection UnitDCCU

Internal Distribution Module, IDM

6.6 kW6.0 kW

Max. power consumption(without active cooler)

200-250 V AC

Power supply voltageRBS 2106 cabinet

(fully equipped)

50A32A

Fuse Rating, 1 phase3 phase

RBS 2106 Power Consumption

RBS 2106 Power System

2.7 kW3.2 kW3.9/5.7 kW

Maximum power consumption

+24 V DC-48 V DC230 V AC

Power supply voltageRBS 2206 cabinet(fully equipped)

200A4 x 35 A4 x 16AFuse Rating

RBS 2206 Power Consumption

230 V AC

+24 V DC

-48 V DC

RBS 2206 Power Supply Connection

RBS 2206 Power System

The Battery Backup System will consist of one or more racks depending on the number or RBS Cabinets and necessary backup time

Battery Backup SystemBBS 2000

• Two, + & -, 95/150 mm² battery cables between the BBS and RBS

•Two optical cables between BFU and RBS for control purposes

BBS 2000 Connections

BFU - 22

BFU - 21

Battery Fuse Units, BFU

• BFU controls the battery system by:

• Measuring battery voltage and current

• Measuring battery temperature

• Measuring RBS load voltage

• BFU will disconnect the batteries from the RBS when:

• Battery voltage drops below 21.0 V or,

• Battery temperature rises above 65 °C (149F)

• BFU will disconnect the batteries from the TM when:

• Battery voltage drops below 20.8 V

• BFU will reconnect the batteries when:

• System voltage rises above 25.5 V and,

• Battery temperature falls below 55 °C (131F)

•These settings are possible to change with the OMT!

Battery Fuse Unit, BFU

Battery Backup operating

RBSTMR

AC power

Antenna Tower

2200 DF

• All Units in mm• Distance between cable ladder support, max 2m

Cable ladder

AC Mains Pwr Distribution

ROXTEC

Future

Expansion

Drip LoopBending Radius

50mm250mm2

BBSFuture

Expansion

Earth Collection Bar

Radio Site Installation Overview

• Outdoor and indoor earthing should be separate, or connected together at a lower point in relation to the container/room.

• Indoor earthing of cabinets should be done pointing to the Earth Collection Bar (ECB).

• ECB should be placed closed to the cable inlet.

Grounding

Weight:Cabinet (fully eqiupped incl. batteries) : 685 kg •Door with Climate Unit : 150 kg

RBS 2106 Measurements and weights

RBS 2106 Space Requirements

RBS 2106 Antenna Connections

Remove the cover to the AC connection box.

Pull out the AC cable through the AC connection box.

Connect the cable to the switch in the AC box cover according to the following circuit diagrams.

RBS 2106 Power Supply Connections

Power Supply Connection 230 V AC

Power Supply Connection 110 V AC

Select the nearest voltage value, according to the nominal AC voltage on site, with the Voltage Selector.

Remove the key from the Voltage Selector and store it inside the cabinet.

Voltage settings on the Climate Unit

Transmission cables and external alarms are connected at the Distribution Frame (DF), located in the left bottom of the RBS cabinet.

The plate containing the DF components can be lifted up for easier access to the OVP modules and alarms. In addition, the alarm frame itself can be lifted up from the DF plate if needed.

Distribution Frame

The rear daughter board slot must contain the OVP board.

The forward card slot must be filled with one of the following daughter boards:

• Dummy board (loop forwarding; no processing function)• Balun board (balances 75 to 120 )• By-pass relay board • A combined bypass and balun board to convert an unbalanced system to a balanced system for the RBS, and to bypass an unbalanced system if the RBS is subjected to a power failure.

Over Voltage Protection, OVP, Module

Remove the cover of the DF connection field. Unfasten the screws at the ends of the external alarm plate. Lift up the external alarm plate. Remove the cover and the OVP card so that the external cable can be attached.Connect the alarm cable to the terminal block If the cable is screened, use the screen braid as an earthing wire. Connect to one of the eight earthing screws on the alarm panel. Fix the cables to the alarm plate using tie-wraps. Make a note of the alarm data on the inside of the DF cover. Insert the OVP card and reattach the cover.

DF Installation – External Alarms

Weight:

•Cabinet (fully eqiupped) : 230 kg •Base Frame : 12 kg

Minimum

RBS 2206 Installation

RBS 2206 Space Requirements

AC Protection UnitAC Distribution Box

RBS 2206 Power Connections Mains

• +24 and –48VDC come from a guaranteed source

•24 VDC Connects to the same connection poles as the batteries do

RBS 2206 Power Connections DC

The DF can be installed either horizontally in a 19” rack or vertically on the wall The DF comes with preattached earthing cable as well as alarm cable DF is available with 7m or 15m alarm cable Each overvoltage arrestor can connect two alarms

Distribution Frame, DF

Remove the cover from the over voltage arrestor. Remove the OVP card, so that you will be able to attach the external cable. Connect the alarm cable to the terminal block. If the cable is screened, connect the screen braid on the alarm cable to the earth terminal. Fix the cables to the mounting plate using tie-wraps. Make a note of the alarm data on the inside of the DF cover. Insert the OVP card and put the cover back.

Distribution Frame External Alarms

Remove the cover and both daughter boards from the PCM overvoltage module for easy access.

Strip the cable to the appropriate length (it should be the inner edge of the clamp). Cut the sheath carefully with a wire-stripper. Avoid damaging the screen. Remove the sheath.

Fold back the screen over the cable sheath.

Strip the insulation from the pair cable and the conducting wires and cut them to the correct length.

Guide the pairs through the strain relief clamps and connect them to the terminal block at the position for 120.

Clamp the screen and the cable under the large strain relief clamp.

Clamp the outer screen carefully under the relief clamp.

Connect the prefabricated PCM-cable between the DF and the RBS.

Re-insert the cards and put back the cover and tighten the screws.

Distributions Frame PCM 120 Ohms

Definitions of configurations

3x2 or 3x4 Configuration 3x2 or 3x4 Configurationdd TMA used

• 4 TRX/cell configuration

• Maximum 3 cells in one RBS (2+2+2 or 4+4+4)

1x8 Configuration1x8 Configuration

dd TMA used

• Maximium 2 cells in one RBS (8+4+0 or 4+8+0)

4+8+0 Configuration 8+4+0 Configuration

dd TMA configurations also available

1x12 Configuration 1x12 Configurationdd TMA used

• Maximium 1 cells in one RBS (12+0+0)

2x6 Configuration 2x6 Configurationdd TMA used

CDU F Cable Wiring

3x2 or 3x4 Configuration 3x2 or 3x4 Configurationdd TMA used

• Maximum 3 cells in one RBS (2+2+2 or 4+4+4)

1x8 Configuration1x8 Configuration

dd TMA used

• Maximium 2 cells in one RBS (8+4+0 or 4+8+0)

1x12 Configuration

1x12 Configurationdd TMA used

2x6 Configurationdd TMA used2x6 Configuration

CDU G Cable Wirings

Antenna System Test

Standing Wave Ratio SWR

Distance To Fault

DTFThe same test setups for all configurations

Different test setup for:

• Configuration with no TMAs

• Configuration with dTMA

• Configuration with ddTMA

• Configuration with adaptive ant

Work Flow Chart Antenna System Tests

Anritsu Site Master331 C

Performing Calibration

DTF Test Setup

Example of an approved DTF measurement

Example of an unapproved DTF measurement

SWR Test set up

SWR test set-up ddTMA

Example of an approved SWR measurement

Example of an unapproved SWR measurement

Example of an approved SWR measurement ddTMA

Example of an unapproved SWR measurement ddTMA

Installation and Integration

• Use the appropriate manual !

OMT kit

BSS R 10 Features

• OMT and Network features– Antenna Hopping– Battery Test– System Voltage and Battery Control

• Network features– Enhanced RX Performance– Adaptive Multi Rate, AMR– Radio Network Synchronization

OMT Interface

Create IDB

OMT cabinet view

Define PCM

OMT Event Monitor

OMT Load of SW

Maintenance Procedures

• Safety• Tools and Instruments• Optical Indicators• Fault Localization• RBS Field Repair• Test after Repair• Concluding Routines

Preventive Maintenance

Work process of fault localization

Preventive Maintenance

Maintenance Exercises

• Use 03814!

Maintenance Cases

• Use the 3816!

Course ObjectivesCourse ObjectivesAfter the end of the course you will be able to:• Understand the RBS 2106/2206/2207 functional build-up• Understand the RBS 2106/2206/2207 configurations• Know the RBS 2106/2206/2207 Product Data• Perform Corrective Maintenance Actions on RBS 2106/2206/2207 and the Antenna System• Perform Preventive Maintenance Routines on RBS 2106/2206/2207 and the Antenna

System

The End

• Hope to se you soon again• Have a look at the course catalogue• Contact your local company for support issues• Thank You

Ericsson RBS Academy Group

GSM RBS Maintenance Course

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