Post on 15-Jul-2015
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Arhitectura functionala GSM
BSS ± Base Station System
PSTN/
ISDN
TC
NNS
BSS
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In cazul unei configuratii multibanda putem avea:
3x2 TRX 900Mhz + 3x2 TRX 1800Mhz in acelasi cabinet
tip
cabinetconfiguratie
TRX max
/sector
IND mini
Omni
2 sectoare
4
2
IND medi
Omni
2 sectoare
3 sectoare
12
6
4
OUT mini
Omni
2 sectoare
3 sectoare
4
2
2
OUT medi
Omni
2 sectoare
3 sectoare
12
6
4
Echipamente BSSBTS ± Evolium Base Tranceiver Station:
Alcatel 9100
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Echipamente BSS
BTS ± Evolium Base Tranceiver Station: Alcatel 9100
12 TRX BTS with dualband, EFR and GPRS inside
Continuous improvement in design with backward compatibility:
Standard version (1998)
EFR, dualband, 12 TRX E volution Step 1 (2000)
AC power supply, integrated Microwave,
3x2 indoor MINI cabinet
E volution Step 2 (2000)
EDGE/GPRS/GSM new standard TRX Stand-alone UMTS Node B: (2001)
Multistandard BTS (2002)
UMTS TRX plug-in
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HLR GCR
Arhitectura functionala GSM
interfete si protocoale
AuC
E
B C
D
F
GH
I
Abis
BCD
EFGH
I
PSTN
ISDN
BTS - BSC
MSC-VLR(SM-G)MSC-HLR
HLR-VLR
(SM-G)MSC-MSC (SS7 basic) + MAPMSC-EIRVLR-VLRHLR-AuC
MSC-GCR
MSC-PSTN(SS7 basic) + TUP or ISUP
MSC-ISDN
LAPD(ISDN type)
GSM Circuit-switching:
(BSS AP = BSSM AP + DT AP)
A BSC - MSC (SS7 basic) + BSSAP
LAPDm(GSM specific)
Um (Radio) MS - BTS
MSCMSC
PSTN /
ISDN
MS
VLR VL
R
EI
R
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Schimburi in retea: secventa tipica de apel
MOBILE
CHANNEL REQUEST
IMMEDIATE ASSIGNMENT
CM SERVI
CE REQUEST
AUTHENTICATION REQUEST
AUTHENTICATION RESPONSE
CIPHERING MODE CMDCIPHERING MODE COMPLETE
SET UP
CALL
P
ROCEEDING
ASSIGNMENT CMD
ASSIGNMENT COM
ALERTING
CONNECT
CONNECT ACK
SET-UP of anRR CONNECTION (MO)
SERVICE INDICATION
AUTHENTICATION
TRANSITION to CIPHERING MODE
START of CALL
TRAFFIC CHANNEL
CALL CONFIRMATION
CALLACCEPTED
ASSIGNMENT
...
«
«
...
GSM
NetworkPSTN or ISDN
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SDCCH N°
MM CM_SERVICE REQUEST
SDCCH N°
RACH
Schimburi in retea: stabilirea unei conexiuni radio
MSCHANNEL REQUEST
IMMEDIATE ASSIGN.
BTS BSC MSC
Um A bis A
CHANNEL REQUIRED
ASSIGNM E NT of an
SDCCH Channel CHANNELACTIV.
ACTIVATION of Channel indicated
CHANNELACTIV. ACK
AGCH
CONN E CTION to theSDCCH Channel
SDCCH SABM ESTABLISH INDIC.
SCCPCONNECT REQUEST
SCCPCONNECT CONFIRM
T3101
T9105
IMM. ASSIGN. CMD
RR
RR
MM CM_SERVICE REQUEST
RR
BTSM
BTSM
BTSM
SDCCH UA
MM CM_SERVICE REQUEST
MM CM_SERVICE REQUEST
...
«
«
...
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RACH
AGCH
SDCCH
Schimburi in retea: actualizarea locatiei
CHANNEL REQUEST
IMMEDIATE ASSIGN.
CHANNEL REQUIRED
CHANNEL ACTIV.
CHANNEL ACTIV. ACK
SABM
UA
ESTABLISH INDIC.SCCPCONNECT REQUEST
SCCPCONNECT CONFIRM
IMM. ASSIGN. CMD
MS BTS BSC MSC
Um A bis A
VLR
SCCPDATADATA REQUESTLOCATION UPDATING
ACCEPT
TMSI
TMSIREALLOC COMPLETEDATA INDICATION SCCPDATA
HLR
UPDATE LOCATIONAREA UPDATE LOCATION
UPDATE LOCATION ACC
INSERT SUBSCR. DATA
LOC. AREA UPD. ACC.INSERT SUB. DATA ACK
TMSI Alloc .
RR
RR
MM
Loc . Upd . Req .MM
RR
BTSM
BTSM
BTSM
MAP MAP
MAP
MAP
MAP MAP
MM
TMSI Realloc . compl .MM TMSI Realloc . compl .MM
Loc . Upd . Req .MM Loc . Upd . Req .MM Loc . Upd . Req .MM
Loc . Upd . Acc .MM Loc . Upd . Acc .MM
...
«
«
...
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PSTN or ISDN
F ACCH
Release of old channel
Changeover to new channel
Internal Handover decision
Schimburi in retea: handover intra BSC
MEASUREMENT REPORT
HANDOVER COMMAND
CHANNEL ACTIV.
CHANNEL ACTIV. ACK
SABM
UAESTABLISH INDIC.
MS BTS 1 BSC MSC
Um A bisA
SCCPDATA
DATA REQUEST
DATA INDICATION
Handover Cmd
H .O . Performed Handover . compl .
BTS 2
(RELEASE REQUEST)
Local E nd
HANDOVER ACCESS(access burst) HANDOVER DETECTION
PHYSICA
L INFO
HANDOVER COMPLETE
T8
RF CHANNEL RELEASE
RF CHANNEL RELEASE ACK
RR MEASUREMENT REPORT
MEASUREMENT REPORTMEASUREMENT REPORTRR
BTSM
BTSM
RR RR
RR
RR
RR
BTSM
BTSM
BSSMAP RR
F ACCH
SACCH
SACCH
F ACCH
(old)
(new)
...
«
«
...
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OMC-X: Operation and Maintenance Centre
X: BSS/NSS/Transmisiuni
analizeaza alarmele din entitati
instaleaza noi elemente de software
parametrizeaza elementele
OSS: Operations Support System
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OSS (Operations Support System)
Network Management Center (Operation & Maintenance)
SGSN
GGSN
OMC-G
OMC-S MSC/VLR
HLR
NMCQ3
MFS
BSS
OMC-R