Nokia – STC Confidential1 © NOKIA DM Arrie Faisal 200403
BSC3i HardwareBSC3i Hardware
Nokia – STC Confidential2 © NOKIA DM Arrie Faisal 200403
BSC3i Functional Units
PDFU 0PDFU-A
GSWB 0SW1C-C
CL
S 0
,1C
LOC
-B
GSWB 1SW1C-C
ET4C 0ET4C-B
(32*ET2E/A)
ET4C 1ET4C-B
(30*ET2E/A)
FTRB 0 FTRB 1
FTRB 2 FTRB 3
CPRJ45 CPGOCPGO
PDFU 1PDFU-A
PDFU 2PDFU-A
PDFU 3PDFU-A
Marker and CellularManagement Unit,
MCMU
Marker and CellularManagement Unit,
MCMU
BSC SignallingUnit, BCSU
BSC SignallingUnit, BCSU
Operations and Maintenance
Unit, OMU
Operations and Maintenance
Unit, OMU
OMUCM2C-A
BCSU 1CC3C-A
BCSU 0CC3C-A
BCSU 2CC3C-A
BCSU 4CC3C-A
BCSU 3CC3C-A
BCSU 5CC3C-A
BCSU 6CC3C-A
CC4C-ACC4C-AMCMU 1MCMU 0
Nokia – STC Confidential3 © NOKIA DM Arrie Faisal 200403
• Mobile Pentium®III with 800 MHz frequency
• 256 MB SDRAM
BSC3i Processing Unit CP710-A, Pentium III Central Processing Unit
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BSC3i Packet Control UnitPCU-B
• Two PCU functions are integrated in one plug-in unit; 2 microprocessor blocks are identical and work independently to handle the tasks
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BSC3i Hard Disks
•Duplicated Hard disk units per BSC to ensure high reliability
•BSC3i is delivered with36G Hard Disks
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BSC3i MO Unit
•Provides even better reliability and performance with longer media life cycle compared with Digital Audio Tape (DAT) technology.
•New BSC3i deliveries are configured with 9.1G MO units
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BSC3i GSWB unit
• Is responsible for the submultiplexing functions of the BSC
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BSC3i Clock Unit
Clock and Tone Generator (CL3TG) plug-in units
• Duplicated units are configured per BSC3i
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BSC3i ET Units
• Provides the external PCM line connections for BSC
• BSC3i includes in maximum 62 ET2 units providing 124 external PCMs (E1/T1)
Nokia – STC Confidential10 © NOKIA DM Arrie Faisal 200403
BSC3i Cabling to Environment• The external cables for the BSC3i
cabinet:• Trunk cables (E1/T1) from the ET2
plug-in units• Alarm cables from the CPRJ45
panel Ethernet (LAN) cable from the
CPRJ45 panel
• All other external cables are routed via the CPRJ45 Connector panel
Nokia – STC Confidential11 © NOKIA DM Arrie Faisal 200403
BSC3i Site Solution• Fast installation and very easy expansion• Simplified cabling with compact one
cabinet design
EXAMPLE BSC3i REMOTE SITES:
Nokia – STC Confidential12 © NOKIA DM Arrie Faisal 200403
Nokia NetAct Link Options•Digital X.25 interface, AS7-B
(PCM time-slot-based O & M interface via A Interface)– An O&M interface via transcoders and transmission
equipment– For network management interfaces in PCM time
slots•LAN (Ethernet) interface, via LAN connector
panel– LAN Ethernet interface for faster access– This is the default NetAct link interface– Connected via LAN connector panel on top of the
cabinet
• The LAN interface redundancy is implemented by providing a redundant LAN connection
• The digital X.25 interface can optionally be redundant by using duplicated units
Nokia – STC Confidential13 © NOKIA DM Arrie Faisal 200403
BSC Peripheral Options
Visual Display Unit, VDU• A visual display unit is used as a user
interface at BSC site. By using a VDU terminal, the user can perform normal operational functions, using MML commands, and diagnostic tests on various units.
• Visual display units can be connected to the OMUin the same way as printers by using the interfaces that comply with the ITU-T Recommendation V.24.
• Present VDU type VT1010 is composed of four different units:
- Display 17" monitor,- Display Controller,- Keyboard, standard 105,- Cables from the BSC to the display
controller.
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BSC Peripheral Options
Line Printer, LPT
External Alarm Unit, EXAU
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BSC3i Configuration
BCSU BSC Signalling Unit including Packet Control Units
CLS Clock & Synchronization Unit
ET Exchange Terminal
GSWB Bit Group Switch
MCMU Marker and Cellular Management Unit
including IP Switch
OMU Operation & Maintenance Unit including System Disk and Magneto-Optical Drive
• Modular and scalable implementation• Small amount of different type of plug-in units• Extremely high availability• Smooth upgrades and extensions without services loss
MCMU
2N
MCMU
2N
CLS
CLS
GSWB
2N
GSWB
2NOMU& SDOMU& SD
BCSUN+1BCSUN+1
ETET ETET
BCSUN+1BCSUN+1
BCSUN+1BCSUN+1
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Comparison between BSC2i and BSC3i
BSC configurations (S10.5) BSC2i BSC3i
Maximum radio network configuration 512 TRX 660 TRX
Maximum number of TCHs per BCSU 512 880
Maximum number of BHCA(Busy Hour Call Attemps) 91 000 117 000
Maximum number of logical PCUs per BSC (PCU-B implementation in BSC3i includes 2 x PCU)
8 + 1 8 (x2) + 1 (x2)
Support for IP interfaces
IP connectors in new deliveries + need for external
IP switching
Full support with inbuilt IP switching
Number of racks in maximum configuration 2 1
CPU type 266 / 500MHz 800MHz
External PCMs 112 124
Mass Memory Type Digital Audio Tape Magneto Optical Disk (standard
unit)
Weight ~ 400 kg ~ 350 kg
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Fast to Assemble, Easy to Install
• Fast installation time on site and very easy expansion
Simplified cabling with compact one cabinet design
2000 mm
600 mm900 mm
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BSC3i Power Supply
• The input voltage is between 41.5 V and 72 V. Because the range is wide, the main battery voltage of the BSC3i can be 48 V or 60 V. In both cases, it is possible to use a direct floating battery.
• The estimated power consumption of the BSCC cabinet with maximum equipment configuration is 1810 W.
Nokia – STC Confidential19 © NOKIA DM Arrie Faisal 200403
BSC3i commissioning 1
1 BSC3i commissioning overview
2 Inspecting BSC3i hardware functioning
2.1 Peripheral units in BSC3i
3 Monitoring BSC3i start-up
3.1 Monitoring Unit start-up in BSC3i
4 Opening the first MML session in BSC3i
5 Verifying the BSC3i's SW version
6 Inspecting the BSC3i's I/O system
7 Monitoring start-up of MBIF in BSC3i
Nokia – STC Confidential20 © NOKIA DM Arrie Faisal 200403
BSC3i commissioning overview 2
8 Inspecting the BSC3i's maintenance system
8.1 Testing the alarm system of BSC3i
8.1.1 Testing wired alarms
8.1.2 Testing external alarms
8.2 Testing the recovery from power breaks in BSC3i
8.2.1 Testing the recovery from complete power break in the system
8.2.2 Testing power break in PDFU
8.3 Testing state transitions and unit diagnostics in BSC3i
8.4 Testing the spare units of BSC3i
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BSC3i commissioning overview 3
9 Checking the clock equipment in BSC3i
9.1 Checking the switchover of the clock synchronisation unit and the clock and alarm buffer in BSC3i
9.2 Inspecting the synchronisation unit in BSC3i
9.2.1 Simulating the synchronisation inputs
9.2.2 Inspecting the synchronisation unit with changeover
10 Checking the BSC3i's hardware configuration
11 Copying additional software and time zone setting in BSC3i
12 Install Changes Delivery, Multi vendor technical note
13 Preparation for integration
Nokia – STC Confidential22 © NOKIA DM Arrie Faisal 200403
BSC3i Interface for Integration
A interface
Abis interface
Q3 interface (digital X.25 & LAN)
CBC interface (BSC-CBC)
Gb interface
Nokia – STC Confidential23 © NOKIA DM Arrie Faisal 200403
BSC3i Overload Protection overview
1. BSC/BCSU/CPU protection against excessive number of paging messages coming from the A interface.
2. BSC/BCSU/CPU general protection
3. BSC BCSU CPU Overload against high RACH load provides also protection for BSC/MCMU/CPU
4. AS7 LAPD Protection
5. GSM-specified overload protection implemented by Nokia
6. Paging message overflow at BTS
7. Access Grant Message overflow at BTS
8. BSC/BCSU protection against excessive number of paging messages coming from the Gb interface.
9. BSC/BCSU protection against high PS RACH load.
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