chp 01 oma000001 gsm nss issue3.2
TRANSCRIPT
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Wireless Curriculum Development SectionWireless Curriculum Development SectionWireless Curriculum Development SectionWireless Curriculum Development Section
ISSUEISSUE 3.23.2
OMA000001OMA000001GSM FundamentalsGSM Fundamentals
OMA000001OMA000001GSM FundamentalsGSM Fundamentals
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
Contents Contents
GSM Network ComponentsGSM Network Components
Terrestrial Interface
Service Area and Number Planning
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
On completion of this section you will be able to:
Draw the structure of GSM
Identify the functions of each component
ObjectivesObjectives
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
AUCAUC
MEME SIMSIM
OMCOMC
HLRHLR
MSC/VLRMSC/VLR
BTSBTS BSCBSC
PSTN
OSS
MS
NSS
BSS
EIREIR
GSM Network ComponentsGSM Network Components
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
Mobile Station—MSMobile Station—MS
International Mobile Equipment Identity (IMEI)
– Mobile Equipment
MS=ME+SIMMS=ME+SIM
International Mobile Subscriber Identity (IMSI)
– Subscriber Identity Module
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Subscriber Identity Module – SIMSubscriber Identity Module – SIM
International Mobile Subscriber Identity (IMSI)
Temporary Mobile Subscriber Identity (TMSI)
Location Area Identity (LAI) Subscriber Authentication Key
(Ki) Mobile Station International
Standard Data Network (MSISDN),
it is optional.
International Mobile Subscriber Identity (IMSI)
Temporary Mobile Subscriber Identity (TMSI)
Location Area Identity (LAI) Subscriber Authentication Key
(Ki) Mobile Station International
Standard Data Network (MSISDN),
it is optional.
GS
M
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
Mobile Switching Center – MSC Home Location Register – HLR Visitor Location Register – VLR Equipment Identity Register – EIR Authentication Center – AUC Inter-Working Function – IWFEcho Cancellor – EC
Mobile Switching Center – MSC Home Location Register – HLR Visitor Location Register – VLR Equipment Identity Register – EIR Authentication Center – AUC Inter-Working Function – IWFEcho Cancellor – EC
AUCAUCHLRHLR
MSC/VLRMSC/VLR
PSTN
NSS
EIREIROMC
BSS
ECEC
IWFIWF
The Network Switching SystemThe Network Switching System
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
Mobile Service Switching Center – MSC Mobile Service Switching Center – MSC
Call Processing
Operations and Maintenance
Support
Inter-network & Inter-working
Billing
Call Processing
Operations and Maintenance
Support
Inter-network & Inter-working
Billing
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Home Location Register – HLR Home Location Register – HLR
Subscriber ID (IMSI and MSISDN)
Current subscriber VLR (current location)
Supplementary service information
Subscriber status (registered/deregistered)
Authentication key and AuC functionality
Subscriber ID (IMSI and MSISDN)
Current subscriber VLR (current location)
Supplementary service information
Subscriber status (registered/deregistered)
Authentication key and AuC functionality
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Visitor Location Register – VLR Visitor Location Register – VLR
Mobile Status(IMSI detached/ attached)
Location Area Identity(LAI)
Temporary Mobile Subscriber Identity(TMSI)
Mobile Station Roaming Number(MSRN)
Mobile Status(IMSI detached/ attached)
Location Area Identity(LAI)
Temporary Mobile Subscriber Identity(TMSI)
Mobile Station Roaming Number(MSRN)
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IMEIIs Checked against White List
IMEIIs Checked against Black/Grey List
If NOT found, checked against Grey/Black List
If NOT found, checked against White List indications
If found, returns a Black or Grey List indicator
•White List•Black List•Grey List
Equipment Identity Register – EIR Equipment Identity Register – EIR
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• Rate Conversion• Protocol Adaptation
PSTN
MSCMSC
ECEC IWF
Inter-Working Function – IWFInter-Working Function – IWF
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Echo takes place by GSM system delay caused by call processing,speech encoding and decoding etc.An Echo Canceller is used on the PSTN side of the MSC for all voice circuits
2-wire4-wire
2- wire
Hybrid Hybrid
Generation of Echo at 2-wire to 4-wire Interface
Echo Canceller - ECEcho Canceller - EC
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OSS(NMC)
OMCOMC
OMC
Region2
Region 1
Region 3
Operation and Maintenance Sub SystemOperation and Maintenance Sub System
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Operation and Maintenance Center – OMC Operation and Maintenance Center – OMC
OMC – R: OMC assigned specifically to the Base Station Subsystem
OMC – S: OMC assigned specifically to the Network Switching Subsystem
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OMC Functional ArchitectureOMC Functional Architecture
OS
MMI
DB
Event/AlarmManagement
SecurityManagement
ConfigurationManagement
Performance Management
Fault Management
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
Contents Contents
GSM Network Components
Terrestrial InterfaceTerrestrial Interface
Service Area and Number Planning
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
On completion of this section you will be able to:
Identify the protocols used on the terrestrial interfaces between the GSM system entities
ObjectivesObjectives
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
HLR
VLR
MSC
EIR
AUC
EC IWF
TC
VLR
MSC
IWF EC
BTS BSCMS
B
H
F
G
A
E
C
D
Um Abis
GSM InterfaceGSM Interface
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
CM
MM
RR
LAPDm
SigL1
L3
L2
L1
MS
RR BTSM
LAPDm
SigL1
LAPD
SigL1
LAPD
SigL1
BTSM
RR
SCCP
MTP
BSSMAP
CM
MM
BSSMAP
SCCP
MTP
MSCBSCBTS
Um½Ó¿Ú A½Ó¿ÚAbis½Ó¿Ú
GSM ProtocolGSM Protocol
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
HLR
MSC/VLR
EIRAUC
EC
OMC
MSC/VLR
TC
IWF
EC
BSC PSTN
BTSBTS BTS
SigL1: 2MBps TrunksSigL1: 2MBps Trunks
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
Typical Configuration
TS 0 TS 1-15 TS16 TS 17-31
TS = Time slot
TS# Used for
0
1-15
16
17-31
Frame Alignment /Error Checking /Signaling
Traffic
CCS7 Signaling (Other TS may also the used)
Traffic
2MBps Trunks2MBps Trunks
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
OSI Layers
7. Application
6. Presentation
5. Session
4. Transport
3. Network
2. Link
1 Physical
CCS7 Levels
MTP Level 1 2 Mb/s Trunk
MTP Level 3
TUP
SCCP
BSSAP(DTAP+BSSMAP)ISUP
MAP
TCAP
MTP Level 2
ITU Signaling System CCS7 ITU Signaling System CCS7
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
Abbreviation of CCS7Abbreviation of CCS7
MTP Message Transfer Part TCAP Transaction Capabilities Application SCCP
Signaling Connection Control Part TUP Telephone User Part ISUP ISDN User Part MAP Mobile Application Part BSSAP Base Station System Application Part BSSMAP BSS Management Application Part DTAP Direct Transfer Application Part
MTP Message Transfer Part TCAP Transaction Capabilities Application SCCP
Signaling Connection Control Part TUP Telephone User Part ISUP ISDN User Part MAP Mobile Application Part BSSAP Base Station System Application Part BSSMAP BSS Management Application Part DTAP Direct Transfer Application Part
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
Contents Contents
GSM Network Components
Terrestrial Interface
Service Area and Number PlanningService Area and Number Planning
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
On completion of this section you will be able to:
Identify the system identification number
Identify the of mobile identification number
Identify the cell identification number
ObjectivesObjectives
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
Service AreaService Area
PLMN service area
......
System area PLMN service area
MSC service area...
Location area...
Base station area...
Radio cell
...... ......
MSC service area...
Location area...
Base station area...
Radio cell
PLMN service area
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
MSC/VLR NumberMSC/VLR Number
The format is CC+NDC+LSPCC : Country Code. For example: The CC of Bangladesh is “88”
NDC : National Destination Code. For example: The NDC of AKTEL is “018”.
LSP(locally significant part): is defined by Telecom operator.For example: 88-018-0159951
CC NDC LSP
MSC/VLR number
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
HLR NumberHLR Number
The format is : CC+NDC+H0 H1 H2 H3 0000.CC : Country Code. For example: The CC of Bangladesh is “88".
NDC : National Destination Code. For example: The NDC of Aktel is 018H0H1H2H3 is defined by Telecom operator.For example: 88-018-099501
The format is : CC+NDC+H0 H1 H2 H3 0000.CC : Country Code. For example: The CC of Bangladesh is “88".
NDC : National Destination Code. For example: The NDC of Aktel is 018H0H1H2H3 is defined by Telecom operator.For example: 88-018-099501
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LAILAI
Location Area Identification
The LAI is the international code for a location area.
MCC : Mobile Country Code , It consists of 3 digits . For example: The MCC of Bangladesh is "470"MNC : Mobile Network Code , It consists of 2 digits . For example: The MNC of Aktel is "02"LAC : Location Area Code , It is a two bytes BCD code(he
x). The value 0000 and FFFF is invalid.For example: 470-02-0011
MCC : Mobile Country Code , It consists of 3 digits . For example: The MCC of Bangladesh is "470"MNC : Mobile Network Code , It consists of 2 digits . For example: The MNC of Aktel is "02"LAC : Location Area Code , It is a two bytes BCD code(he
x). The value 0000 and FFFF is invalid.For example: 470-02-0011
MCC MNC LAC
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
CGICGI
The CGI is a unique international identification for a
cell
The format is LAI+CI
LAI: Location Area Identification
CI : Cell Identity. This code uses two bytes BCD
code(hex) to identify the radio cells within an LAI.
For example : 470-02-0011-0001
The CGI is a unique international identification for a
cell
The format is LAI+CI
LAI: Location Area Identification
CI : Cell Identity. This code uses two bytes BCD
code(hex) to identify the radio cells within an LAI.
For example : 470-02-0011-0001
CGI: Cell Global Identification
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
CC : Country Code. For example: The CC of Bangladesh is "88".
NDC : National Destination Code. For example: The NDC of Aktel is 18
SN : Subscriber Number. Format:H0 H1 H2 H3 ABCDExample: 88-018-705-1911
CC : Country Code. For example: The CC of Bangladesh is "88".
NDC : National Destination Code. For example: The NDC of Aktel is 18
SN : Subscriber Number. Format:H0 H1 H2 H3 ABCDExample: 88-018-705-1911
MSISDNMSISDN
CC NDC SN
National (significant)Mobile number
Mobile station internationalISDN number
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
MCC : Mobile Country Code , It consists of 3 digits . For example: The MCC of Bangladesh is "470" 。MNC : Mobile Network Code , It consists of 2 digits . For example: The MNC of Aktel is "02" 。MSIN : Mobile Subscriber Identification Number. H1H2H3 S ABCDE
F For example: 666-9777001NMSI : National Mobile Subscriber Identification , MNC and MSIN
form it together. For Example of IMSI : 470-02-666-9777001
MCC : Mobile Country Code , It consists of 3 digits . For example: The MCC of Bangladesh is "470" 。MNC : Mobile Network Code , It consists of 2 digits . For example: The MNC of Aktel is "02" 。MSIN : Mobile Subscriber Identification Number. H1H2H3 S ABCDE
F For example: 666-9777001NMSI : National Mobile Subscriber Identification , MNC and MSIN
form it together. For Example of IMSI : 470-02-666-9777001
Not more than 15 digits
3 digits 2 digits
IMSI
MCC MNC MSIN
NMSI
IMSI IMSI
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
The TMSI is assigned only after successful subscriber authentication.
The VLR controls the allocation of new TMSI numbers and notifies them to the HLR.
TMSI is used to ensure that the identity of the mobile subscriber on the air interface is kept secret.
The TMSI consists of 4 bytes (8 HEX numbers) and determined by the telecom operator.
The TMSI is assigned only after successful subscriber authentication.
The VLR controls the allocation of new TMSI numbers and notifies them to the HLR.
TMSI is used to ensure that the identity of the mobile subscriber on the air interface is kept secret.
The TMSI consists of 4 bytes (8 HEX numbers) and determined by the telecom operator.
TMSITMSI
TMSI: Temporary Mobile Subscriber Identification)
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IMEIIMEI
TAC FAC SNR SP
IMEI
TAC : Type approval code. It is administered by the type approval center.
FAC : Final assembly code.It is administered by the manufacturer.
SNR : Serial number.It is issued by the manufacturer of the MS.
SP : Not used.
TAC : Type approval code. It is administered by the type approval center.
FAC : Final assembly code.It is administered by the manufacturer.
SNR : Serial number.It is issued by the manufacturer of the MS.
SP : Not used.
IMEI: International Mobile Station Equipment Identification
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
MSRN/HONMSRN/HON
The MSRN is used to route the call to the MSC which MS is currently located.
The HON is used by the MSC-A to set up a connection to the MSC-B during handover process
Usually, MSRN and HON share the same numbering plan. The format is CC+NDC+individual number. CC and NDC
is the same as that of MSISDN. The individual number is taken from a pool of numbers specially reserved for MSRN.
The MSRN is used to route the call to the MSC which MS is currently located.
The HON is used by the MSC-A to set up a connection to the MSC-B during handover process
Usually, MSRN and HON share the same numbering plan. The format is CC+NDC+individual number. CC and NDC
is the same as that of MSISDN. The individual number is taken from a pool of numbers specially reserved for MSRN.
MSRN: Mobile Subscriber Roaming Number
HON: Hand-over Number
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.
GSM Network Components
Terrestrial Interface
Service Area and Number Planning
SummarySummary
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Security Level: InternalConfidential Information of Huawei. No Spreading without Permission.