Huawei BTS 3900

Huawei BTS 3900 Overview

Presented by : Md. MoniruzzamanRadio Planning

BTS 3900

BTS 3900

• RFU Radio Frequency Unit• GATM GSM Antenna & TMA Control Module • BBU BaseBand processing Unit (CPU)• DCDU Direct Current Distribution Unit

Overview

Overview

Hardware Components

Logical structure of BTS

ERICSSON RBS HUAWEI BTS

TRX Evolution

dTRU(2 TRX)2206

dRU(2 TRX)2216

DRFU(2 TRX)

GRFU(6 TRX)

MRFU(6 TRX)3900

MRFU & BBU

MRFU connection port (6)

Alarm monitoring port

GATM port

MRFU BBU

Logical Structure of GRFU/MRFU

Why MRFU (GRFU)

Although GRFU & MRFU support 6TRX ,but MRFU has some additional

advantage

Power sharing support

75 MHz continuous Band support

SDR (Software Defined Radio)

TX diversity

PBT (Power Boost Technology)

4-way receive diversity support

FDR (Frequency Domain Reflectometer )

Power Sharing

Larger Band Support

SDR (Software Defined Radio)

Advantage of SDR

GSM/UMTS co-exist

SCPA vs MCPA

ERICSSON RBS HUAWEI BTS

Challenges of SCPA

Benefits of MCPA

Power output of MRFU

47 dBm

43 dBm

40 dBm

** As common Power Amplifier uses

Capacity Enhance

Antenna Reduction

2nd

Cab

3rd

Cab 2nd

Cab

3rd

Cab

MRFU—BBU Topology

** ERICSSON uses only star topology for dRU---DXU connection.

Comparison of Topology

TRU add/del issue

TRX Board No/Slot No

Board Type

TRX Board Pass No

RXU Name

RXU Chain No

RXU Chain HeadPN

TRX Number

Com/Uncom port

TRX Power Type

Band

Solution

Old Value

New Value

Frequency

Frequency Hopping mode

Cell HSN

Cell TSC

BCCH frequency

Cellwise frequency list(900)

Cellwise frequency list(1800)

Modification reason

BSCSite

Name

Cell Nam

e

Board type

Trx Board Pass No

TRX Numb

er

RXUName

TRX Board No/Slot No

RXUChain No

RXU Chain Head PN

Status

Com/Unco

m port

Trx Power Type

BandSolutio

n

Old value

New value

Frequency

Frequency

HOPPING

Mode

Cell HSN

Cell TSC

MAIOBCCH freque

ncy

Cell wise frequency list(900)

Cell wise

frequency

list(1800)

Information required to add/del TRX


1.Open the LMT.

2.Select BSC name->site name->cell name.

3.Board type is here DRFU.

4. Select the DRFU(alternate name RXU) where the TRX will be add/del.

5.Define the Pass no (logical position of TRX in DRFU) of the TRX.•Pass:0 is the 1st TRX •Pass:1 is the 2nd TRX in a DRFU

6.Define the TRX No (logical TRX No) for TRX add. In LMT only active TRX No is shown. For deleting an active TRX, need to mention the active TRX NO.

BSC Site Name Cell Name Board typeTrx Board Pass No

TRX NoRXU

Name


TRX Board No/Slot NoRXU Chain No RXU Chain Head PN

7.Find the slot/board no of the DRFU(logical position of DRFU in cabinet) which is known as TRX Board/port no.

8.Find the RXU chain no and RXU chain head port no under which the DRFU is configured.


Status Com/Uncom port Trx Power Type Band Solution Old value New value

9. Status-> it means whether to activate or deactivate TRX.

10. Com/Uncom port-> Tx independent(No combining) or combining(Basically defines the send mode).

11. TRX Power type -> Defines the power type according to frequency band. 900 TRX power type=20W1800 TRX power type=18W(for DBS 3900,power type=10W)

12. Band-> Frequency band type (GSM900/GSM1800)

13. Solution-> depends on install TRX value(uncombined/2 TRX combined+1 TRX uncombined/Nothing).In BTS 3900,solution type Nothing is very common.

14. Old value-> install TRX(UL+OL) and active TRX(UL+OL) before TRX add/del.

15. New Value-> active TRX(UL+OL) after TRX add/del.


FrequencyFrequency

HOPPING ModeCell HSN Cell TSC MAIO BCCH frequency Cell wise frequency list(900)

Cell wise frequency list(1800)

16.Frequency-> Planned to be add/del in the case of 900 band.

17.Frequency Hopping mode-> baseband/synth in TRX level.

18.Cell HSN->important for 1800 band. Need to define in TRX level.

19.Cell TSC-> Need to define BCC value of the cell in each of its TRX level.

20.MAIO-> important for 1800 band. Need to define in TRX level.

21.BCCH frequency->BCCH frequency of the cell.

22.Cell wise frequency list(900)-> proposed cell wise 900 frequency list after add/del TRX in the cell.

24. Cell wise frequency list(1800)-> planned to be add/del in the case of 1800 band.

Glossary

Thank You

Q & A ??

Swapped site BMICH1

BTS 3900

DRFU

BBU

Documents

Huawei BTS 3900