Presentation on Basics of BSS with Common mistakes in O&M of

BSS

Md. Mostafizur RahmanAssistant Manager

System Operations, Dhaka

Date: 24 Nov, 2011

Contents:

We will discuss on: • BTS family with SW version• BTSE H/w• Basics of Channel• Channel configuration• Common Mistakes in BSS configuration• Various cards and their functions• Discussion on commissioning of BTSs• Comparison of different racks and its configuration• Miscellaneous • Questions & Answer

Two types of BTS Family:• BTS Plus: BS240XL, BS240, BS241, BS240B II• BTS Basic: BS240XS, BS288.

SW used in TBL BSS:

BR-10: All NSN BSC except DK06 & Khulna BSC 01-04-19-01-15-07_09-12-21

BR10 MP-5: DK06 01-04-19-01-16-15_11-04-13

BR10 MP-2: Khulna BSC 01-04-19-01-16-04_10-05-10

BS 240ll BS 240XL

BTS Model: BS 240 XS

BCOM OF CONFIG 6:6

BCOM OF CONFIG 12:6

Insertion Loss:

Internal Connection Diagram of ACOM in 4:2 Configuration

ACOM (Old Model)

ACOM (New Model)

Hybrid (For used with new ACOM

Types of FDUAMCO:

FDUAMCO:8:2 Config

DUAMCO Configuration: X:Y= 4 : 2

X=No of Tx connectors fed by CUY= No of antenna connectors(Always 2)

All DUAMCO are composed of two independent sub-modules(we can use each module for different cells)

Typical Power Consumption of Diff. BSS Modules:

Basic functional Block of CU:

CU Output Power: For 900: 50WFor 1800: 35W

CC Link: Bi-directional Link between CU and COBA. Used for sending alarm to BSC

CAN BUS: All non CU boards (Combiner) send alarm to COBA via CAN BUS.

FCU Ports:

Types of ECU:

Main function of COBA/COSA: • Local control of entire BTSE• Generation of System clock• Provide max 8 interface to BSC/other BTSE(4 for other BTSE, other 4 for BSC)• Routing Abis data to CUs• Provide & control T interface to LMT• Handling & Processing of O&M msg.• COBA stores BTSE SW.• Supervises SW downloads• Handle signaling msg between CU & BSC.

O/P Power Level of Diff. CU’s:

COBA 4P12:

4 PCM lines12 CU interfaces

DIP Switches in COBA:

DIP Switch Settings:

Traffic Flow between MSC & BSC via TRAU:

TRAU Rack:Model: 120HC

Some Real BTS Configurations:

Some Real BTS Configurations:

Some Real BTS Configurations:

Some Real BTS Configurations:

Thank You….