BTS HW System

Viettel (Cambodia) Pte., Ltd

HUAWEI BTS3900 Hardware and Alarm

Pheoung SarimBSS Team leader

NOC Department

ISSUE1.0

Contact point

(855) 977292888

www.metfone.com.kh

Contents

1- BTS3900/BTS3012 System Description

2- Hardware Component

3- Alarm

4- Configuration

1- BTS3012/BTS3900 System Description

PSTN ISDN

PSPDN

Um Interface

BTS3900

BTS3900

BTS3900

BTS

OMC

HLR/AUC/EIR

BSC

MSC/VLR

SMC/VM

A Interface

MAP

MAP

TUP,ISUPMS

MS

MS

MS: Mobile Station BTS: Base Transceiver Station BSC: Base Station Controller

HLR: Home Location Register AUC: Authentication Center EIR: Equipment Identity Register

MSC: Mobile Switching Center VLR: Visitor Location Register SMC: Short Message Center

VM: Voice Mailbox OMC: Operation and Maintenance Center DBS： Distributed Base Station

2. BTS3900 Hardware structure

2- Hardware Component

BTS 3900 Hardware consists of :

BBUDRFU/GRFUDCDU-01GTMUFAN BOXCPRI CableRX CableExternal alarm (RJ45 Port 0)Jumper

2. BTS3012 Hardware structure

DTRU DDPU

Antenna and feeder subsystem

Forepart of RFSubsystem

DTRU DDPU

DTRU DDPU

Double transceiver subsystem

Um Interface

fiber

E1

Abis Interface

Common subsystem

NFCB

Metro 100

DTMU

DEMU

E1

BITSMonitor

TBUS/DBUS/CBUS

MS

FH_BUS

Extension cabinet

DBUS/

TBUS

CBUS

CBUS3

CBUS3

CBUS3

CBUS2

CBUS2

CBUS2

CBUS3

CBUS3

Pro

tect

ion f

or

signal FH_BUS

FH_BUS

RF signal

RF signal

RF signal

DCSUDBUS

BTS 3012 Hardware consists of :

2- Hardware Component (Cont)

D D D D

Wiring & Air Inlet

Wiring

DDPU

DDPU

DTRU

DTRU

DTRU

Wiring

FAN

Air Inlet

MLC

Power and EMC

DDPU

ELC

ELC

SAC

DTMU

DEMU

DC

CU

CS

D

U

Double transceiver subsystem

Common Subsystem

Antenna Front-End of the RF Subsystem (DAFU)

Cabinet Top Access Subsystem (DCTB)

2- Hardware Component (Cont)BTS 3012 Hardware consists of :

Abbreviations Description

DTRU Double Transceiver Unit

DTMU Transmission & Timing & Management Unit for DTRU BTS

DCCU Cable Connection Unit for DTRU BTS

DAFU Antenna Front-end Unit for DTRU BTS

DDPU Dual Duplexer Unit for DTRU BTS

DMLC Monitor Signal Lightning-Protection Card for DTRU BTS

DELC E1 Signal Lightning-Protection Card for DTRU BTS

DCSU Combined cabinet Signal connection Unit for DTRU BTS

DEMU Environment Monitoring Unit for DTRU BTS

DCTB Cabinet Top Backplane for DTRU BTS

FAN Box NodeB Fan Controlling and monitoring Board

3- Alarm

1- Board Type Mismatch alarm

2- Cell out of service

3- Diversity receive alarm

4- Radio link prompt alarm

5- TRX Communication alarm

6- TRX Config Mismatch alarm

7- TRX VSWR alarm

8- VSWR Prompt alarm

9- SFP Port Inconsistency Alarm

3- Alarm (Cont)

10- TRX Hardware Critical Alarm

11- Level 2 VSWR Alarm


13- Board Communication Alarm

14- DBUS alarm

1- Board Type Mismatch alarm

Description

This alarm is reported when the board inserted into the slot is not the Antenna and GSM type.

ReasonHardware:- Insert wrong GSM type and card name. EX: Inside we use GSM900 but we insert GSM1800. And BTS site use card GRFU, but in BSC site configure card DRFU. System:- GSM type at site and BSC site are difference type.- Board name at BTS site and BSC configuration are difference name.

Solution

- Replace the board according to the system configuration.

- Replace the board according to the queried board type.

2- Cell out of service

DescriptionThis alarm is generated when the hardware is faulty or lock cell.

ReasonHardware:

- Faulty card DRFU/GRFU.- Module was damage- Card DDPU, DTRU broken.- TX cable loose connection or broken.

System: (Click here for detail)- Lock cell or cell not active.- Software not activated.

Solution- Swap card DRFU for test.- Replace DRFU card- Replace Module and CPRI optic cable- Check port on GTMU card- Check card DDPU or DTRU if faulty and Replace new.- Replace TX cable


Description- The alarm is reported when the gain of the diversity receive path smaller than that of the diversity receive path exceeds the relevant threshold.

Reason Hardware:- The connection of the RF cable is loosened, broken, wrong configuration or

damaged.- The connection of Jumper is different Antenna port on BTS and BSC- The diversity antenna is not installed, and only the single jumper is available.- Card DRFU was damage. System: (Click here for detail)- The TRX is configured in Single Antenna and Double Receiver mode is wrong. - Wrong configured Sent Receive Mode in BSC

Solution- Check if the configuration of the TRX is in BSC Sent Receiver mode was configur.- Check if only the single jumper is available. - Check the RF cable connection between the TRX, feeder, and antenna. If the cable

is loosened, tighten the connector. If the cable is damaged, replace the cable.- Replace card DDPU, DRFU, DTRU- Replace Antenna


Note:- In system configuration

2TRXs set Antenna mode (Sent Receive mode

Double Feeder (2TX + 2RX)

1

2

4TRXs set Antenna mode (Sent Receive mode

Single Feeder (1TX + 2RX)

1 2One card

DRFU have

double feeders

One card DRFU have single feeder

4- Radio link prompt alarm

Description- This alarm is reported when the BTS detects continuous RL abnormalities. The power level imbalance between uplink and downlink. It indicates that the uplink power level and the downlink power level deviate from each other greatly.

Reason Hardware:

- The connection of the RX cable is loosened, broken, wrong configuration or damaged. - Card DRFU was damaged.

Software: (Click here for detail)- Wrong Configure between BSC and BTS- Wrong Receive Mode and Sent Mode (If Config 2TRX must be configure Dividing

Receiver and No combine)- Wrong Downlink tributary on configure of DDPU (Uplink/Downlink/Tributary)

Solution- Check connection of the RF cable is connected.- Check configuration of RX cable is corrected.- Replace RX cable or card if faulty.- Replace card DTRU/DDPU if male connector broken. Note:

- Radio link prompt alarm have three Sublink No:

0:Abnormal channel activation alarm (Traffic normal)

1:Abnormal channel release alarm (Traffic normal)

2:No traffic alarm (Traffic warning have to reset site)

3:Power level imbalance between uplink and downlink alarm (Wrong RX configuration)

5- TRX Communication alarm Description

- This alarm is reported when the TRX detects that the transmitting/receiving phase-locked loop or the test phase-locked loop in the TRX cannot output the required frequency.

Reason- The connection of the Jumper cable is loosened or broken.- CPRI optic cable is loosened or broken.- Insert CPRI optic cable incorrect to the port of DRFU and GTMU port.- DRFU is faulty.- TX cable loose connection between DDPU to DTRU or broken.- Card DTRU or DDPU faulty.

Solution- Reset site- Check CPRI cable if installed- Check card DRFU is faulty- Check Jumper if installed- Replace card DRFU or CPRI cable if faulty- Replace DDPU, DTRU if broken.- Check TX cable if loose connection between DDPU and DTRU.- Replace TX cable- Reset site

6- TRX Config Mismatch alarm

DescriptionThe alarm is reported when any of the following conditions occurs: (1) The frequency of the TRX is not consistent with the type of the TRX. (2) The static power of the TRX is lowered by the main control module to protect

Reason Hardware: - Wrong GSM card (Bandwidth) (GSM900/1800) of Card DRFU/GRFU (Insert wrong

GSM card)- Insert wrong CPRI cable wrong slot on card GTMU.- Patch E1 wrong site (Mean: E1 of Main site patch for Cosite and E1 of Cosite

patch for Main site) Software:- Wrong Sent Receive Mode of Antenna- The type of the board in the slot is different from the configured board type on the

BSC side- The RF front end power is small.- Frequency and TRX type mismatch.

Solution- Check Frequency on BTS and BSC are the same- Check Sent Receive Mode on BSC and BTS are the same.- Check card DRFU/GRFU was install correctly .- Reset site

6- TRX Config Mismatch alarm (Cont)

SolutionSoftware:

View alarm:- Click on site name and than click on card of cell by right

click on card DRFU/GRFU => View Site Board => Configure Site Board Attributes => View on Sent Receive Mode => Single Feeder (1TX + 2RX)

- Not: If you see this mode you must be change it to Double Feeder (2TX + 2RX) if site configured 2TRX.

Solution: (Click here for detail)- Right click on site at left panel => Configure Site Board

Attribute => Configure Site Board Attribute => Configure Site Board Attribute = Sent Receive Mode (Double Feeder (2TX + 2RX)) => OK => OK => Finish. And than Reset site.

7- TRX VSWR alarm

Description- This alarm is generated when the cables concerning the power output port

of the TRX (TX1, TX2, TCOM) are not properly connected.- This alarm is generated when the antenna jumper is not connected to the

antenna port of the Carrier Module. Reason

- The cable between the power output port of the TRX and the power input port of the RF front-end unit (DDPU) is damaged.- The connection of the Jumper cable is loosened or broken.- The CPRI cable is not connected between DRFU to GTMU- Feeder faulty.

Solution - Reset site- Check whether the connections between the modules and the cable

connectors are loose. - Check CPRI cable if loosened or broken.- Change Jumper, CPRI cable, Feeder, or card if faulty- Check the values of VSWR level between BTS and BSC

8- VSWR Prompt alarm

Description- If the VSWR of the antenna system exceeds the Carrier Module VSWR warning alarm threshold, the VSWR warning alarm is generated.

Reason- The connection of the Jumper cable is loosened or broken.- Carrier Module (DRFU) is faulty- Feeder, connector of feeder and antenna was faulty

Solution- Check the connector of the cable connecting to the antenna port of the Carrier Module.- Check the connector of the cable connecting to the antenna port. - Replace the jumper of the antenna system.- Replace the Carrier Module. - Replace the antenna.


Description- The SFP port configuration on the RXU Chain of the BSC is inconsistent with the physical connection.

Reason- Topology configuration on the SFP port is inconsistent with physical connection.- CPRI chain/ring on the SFP port is disconnected.- A CPRI port on the GTMU chain/ring on the SFP port is blocked.- Card DRFU faulty.

Solution - Reset card GTMU if not clear- Remove CPRI cable if the port on GTMU is not used.- Check connection of CPIR cable between DRFU and GTMU is corrected.- Replace card GTMU if port blocked.


GTMU

BBU Interface

10- TRX Hardware Critical Alarm

DescriptionThe alarm is reported when any of the following conditions occurs: 1. The TRX phase-locked loop is faulty, which causes the TRX

unavailable. 2. The power unit, power amplification unit, flash memory or RF

module is faulty, which causes the TRX unavailable. Reason:

- Card DRFU/GRFU was damage.- RF cable (CPRI) broken- Card not run yet download software from BSC

Solution- Reset card DRFU/GRFU.- Check CPRI cable and GTMU port- Replace CPRI cable is faulty.- Replace Card DRFU/GRFU is broken.


DescriptionThe DUP Unit reports a VSWR alarm when detecting that the VSWR on antenna port A or antennal port B is greater than Serious Standing Wave Radio Alarm Threshold (default Value: 3.0).

Reason: Hardware: - The VSWR of the antenna system is too high value.- TRX Communication cable between card duplexer unit (DDPU) and card transceiver unit (DTUR) lose connection. (If Level 1 VSWR Alarm)- The Carrier Module (DDPU) is faulty. - The Feeder, Connector or Jumper is broken- The Antenna was faulty or damaged

- The connections between the jumper and the duplexer

(DDPU) between the jumper and the feeder, between the jumper and the surge protection unit and between the jumper and the antenna faulty.

11- Level 2 VSWR Alarm (Cont)

Solution:- Check the connections between the jumper and the duplexer unite,

between the jumper and the feeder, between the jumper and the surge protection unit, and between the jumper and the antenna.

- Check whether the water leaks into the connectors between the jumper and the duplexer, between the jumper and the feeder

- Replace the connector where water leakage occurs and conduct waterproof protection on the new connector in compliance with related engineering standards.

- Check card DDPU/DRFU is faulty - Check TX cable between card duplexer unit (DDPU) and card transceiver

unit (DTUR) was broken or damage. (Level 1 VSWR Alarm)- Change new TX cable is broken. (Level 1 VSWR Alarm)- Replace new DDPU/DRFU. - Replace new feeder - Replace new Antenna - Replace new Jumper

13- Board Communication Alarm

DescriptionThis alarm is reported when the main controlling module detects abnormal communication between it and the radio frequency (RF) front module.

Reason: Hardware:- Card DDPU was broken.- Power cable of DDPU connected to DAFU is broken.- Communication cable between card DSCU and DCCU to the top DSCB

card are broken or loose connection.Solution:

- Check power cable connect between the Front-End unit to DAFU- Check card DDPU is abnormal- Check Com cable connect between DSCU, DCCU and the top of DSCB

are connected.- Swap card DDPU for test card.- If not change card DDPU.

14- DBUS alarmDescription

This alarm is reported when the DBUS clock of the TRX is abnormal or the TRX hardware detects that the DBUS signal sent by the main control module is lost.

Reason: Hardware:- DTRB Cable on card DSCU connected to DSCB are loose

connection.- Tran cable on card DCCU loose connection or broken.- Subrack of DTRU was damage.- The DBUS cable connected from Subrack DTRU to DTMU are not

connected.Solution:

- Check connection between subrack transceiver to common subrack are connected.

- Card DTRU high temperature is the problem.- Change DBUS cable is we can. (DBUS cable connect with Subrack

DTRU (Behind subrack DTRU card) to Common subrack.)- Change BTS cabinet if it broken.

4- Configuration BTS3012

Typical configuration S2/2/2 (No combining mode）

Typical configuration 2/3/3 no share card

4- Configuration BTS3012 (Cont)

Downlink tributary AB Downlink tributary ABB Downlink tributary ABB

Typical configuration 2/3/3 share card slot 4


Downlink tributary AB Downlink tributary AAB Downlink tributary ABB

Typical configuration 4/4/4


CPRI_0 CPRI_1 CPRI_2 CPRI_3 CPRI_4 CPRI_5

4- Configuration BTS3900

Typical configuration S2/2/2

Typical configuration 2/3/3 no share card



Typical configuration 2/3/3 share card slot 4



Typical configuration 4/4/4



Name: PHOEUNG SARIME-mail: [email protected]: +855977292888

BTS HW System

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