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BSS in a SDH network / architecture

On TCG2.5

On MxBSC(B11)

Not on MFS

Not on BTS

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BSS in a SDH network / BSS hardware

TC TC subrack

TCIF board (1+1)

TCIF STM-1 daughter board

HSI cord

MxBSC

TPGSMv3 with STM-1 on mother board

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BSS in a SDH network / APS function

VC12 mapSTM-1

portVC4

STM-1

framer/LIU

STM-1

framer/LIUSTM-1

port

status

standby

APS

statusActive board

Standby board

active

Redundancy:

At link level thanks to Automatic Protection Switching. Solution isbi-directional and revertive : traffic is always on one link and only

on primary TCIF if links are ok At board level thank to active/stand-by mode TCIF & TPGSM

(1+1)

The same principles apply to both TC and MxBSC

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BSS in a SDH network / TC management

From TC-NEM, configuration management Running on remote OMCR I.e. no more need to have a local TC-

terminal

TDM to IP change in several steps:

MT120 FW upgrade to have HSI access on top of TCIL

TCIF, STM-1, TC subrack change

Supervision

MxBSC managing TC using Qmux link

TCIF makes central control of the rack

Or TCIF managing MIBs and reportig directly to the OMCRsthanks to SNMP agent

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BSS in a SDH network / CAPEX

STM-1 switch 1st assumption is Alcatel Switch 7650-SE quipped with 2 shelfs, 2

control-boards (1+1) switch included (~20KEuros), 2 STM-1 boards(N+1 redondancy) (~20KEuros), 32 E1 cards (7KEuros) .

Current assumption is Alcatel 1650 SM which is pure VC12/E1 switch

(2G does not need ATM as UMTS)

STM-1 K12/K15 monitoring board does not exist, NetHawk M5Mwith STM-1 board is the tool for monitoring.

MSC/E10 with STM-1 interface boards

Hyp : no LSU upgrade to STM-1

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STM-1 acronyms

APS: automatic protection switching 2 STM-1 links are connected to the MxBSC/TC

MSP: multiplex section protection

SFP : small form factor pluggable module

SDH: synchronous digital hierarchy

VC: virtual container

UNI/NNI : User-Network Interface / Network-Network Interface

Because of clock mastership (TC, BSC cannot distribute clock)we cannot have a direct MxBSC-TC STM-1 connection.

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STM-1 acronyms

Monomode/multimode : type of fiber, usage is monomodewhile more expensive

http://www.guideinformatique.com/fiche-fibre_optique-506.html

Monomode:SMF=Single Mode Fiber

Multimode : MMF=Multi Mode Fiber

Path trace : electronic label on the link

Wavelength:

S-1.1 : 1300 nanometers, 15 km distance

L-1.1 : 1300 nm, 45 km

L-1.2 : 1550 nm, 80 km

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