gsm training for professionals
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GSM Training for Professionals. TOPICS. Module-1Introduction of Communication and Wireless Concepts History of Communication Telecommunication Basics Frequency, Range of Wireless Frequency Channel Concept Multiple Access Concepts and its types - PowerPoint PPT PresentationTRANSCRIPT
GSM Training for Professionals
TOPICS Module-1 Introduction of Communication and Wireless Concepts
History of Communication Telecommunication Basics Frequency, Range of Wireless Frequency Channel Concept Multiple Access Concepts and its types
Module-2 Cellular Generation Wireless Concepts
1st Generation of Cellular Communication (AMPS, TACS) 2nd Generation of TDMA , GSM 3rd Generation WCDMA 4th Generation LTE
Module-3 GSM Architecture
MS BSS NSS Interfaces, Protocols
TOPICS Module-4 GSM Channel Concepts
GSM Channels Physical and Logical Channels
Module-5 Cell Planning Concepts
Cell Planning Basic Cell Planning Tools , TEMPS
Module-6 NSS/BSS Hardware and Software
MSC HLR STP BSC
Module-7 DATA Calls
HSCSD GPRS Data Call Path, SGSN and GGSN Hardware
TOPICS Module-8 Call paths
Postpaid to Paid calls Postpaid to Prepaid calls Operator to Operator Calls Mobile to PTCL calls
Module-9 Mobile Packet Backbone Network
OSI layer IP Fundamentals IP Routing , Protocols MPLS Requirement in Telecom
Module-10 GSM Evolution Path
GSM Towards LTE LTE Architecture S-GWS, MME, eNode
Wireless Access Evolution
New ServicesNew Services EfficiencyEfficiency More Data More Data
Services Services requiredrequired
Broadband
Subscribers
Voice
CoverageCoverage MobilityMobility
Voice QualityVoice Quality PortabilityPortability CapacityCapacity Data ServiceData Service
BroadbandBroadband Network Network
SimplificationSimplification Cost of Cost of
OwnershipOwnership
Secrete of Upgrade Maximize
Utilization Spectrum Efficiency FDMA/TDMA/CDMA/OFDMA Power Efficiency----------------Battery
Minimize
Complexity------- System should be Simple, Cost--------- It should be minimize , as per customer needs
GSM Architecture Overview Main components of GSM
The mobile station (MS) BSS Base Station Subsystem (BTS+BSC) MSS Mobile Station Subsystem (MSC/HLR, ..)
BSCBTS MSC
Network Overview
BTS
BSC
MSC
VLR HLR AuC EIR
PSTN,ISDN...
OMCOMC
NMC X.25 linksGSM interfaces
Voicemail Server
SM-SC
MS (Mobile Station)
BSS (Base Station System)
NSS (Network Switching Subsystem)
OMM (Operations & Maintenance Management)
MS
RAN department
RF department
NSS department
Transmission department
Services offered
Voice ServicesData Services (GPRS/MMS)Short Code Services
GSM Voice Network
Only Voice Call
GSM Voice and Data Call Architecture
Voice Calls Path
Data Calls Path
Packet Data14.4 Kp/s
GSM Prepaid Services
BSC HLR
MSC SMSC
EIR
PrePaidPrePaid
VMSVoicemail
OMOPSTNFixed Network
SMSC
Short Code Services
Cell Planning (RF)
Two Key technologies are evolving to meet the Wireless Broadband Requirements
802.11n(smart antennas)802.11Mesh extns.
Loca
l Are
aFi
xed
Wid
e A
rea
Mob
ile
Cov
erag
e/M
obili
tyM
etro
Are
aN
omad
ic
802.16(Fixed LOS)
802.16a/d(Fixed NLOS)
802.11b/a/g
Mobile Industry
Fixed Wireless Industry
4G Air Interfaces
Data Rates (kbps)100,000 +
GSM UMTS HSPAGPRS EDGE LTE 3GPP
MOBILE BROADBAND
DSL ExperienceDial Up
Higher Data Rate / Lower Cost per Bit
802.16e(Mobile WIMAX)
Fibre Experience
Converge Networks
GSM Call GSM Call SetupSetup
MS Mobile Station = phone + SIM card
BTS Base Transceiver Station BSC Base Station Controller HLR Home Location Register MSC Mobile services Switching
Centre VLR Visitor Location Register AUC Authentication Centre
Stand-alone or integrated in HLR
EIR Equipment Identity RegisterFor blacklisting stolen and
unwanted equipment SMSC Short Message Service
”Support” Centre VMS Voice Messaging System PrePaid Node Hosting prepaid service
system IN Intelligent Network services PSTN Public Switched Telephone
Network PABX Private Automatic Branch
Exchange
MSC/VLRWarid
Telenore
BSC
SMSC
EIR
INTERNET
MobilinkPSTN
BSC
PrePaidNode
VMS
HLR
MSCw
AUC
MSC SMSC
EIR
INTERNET
PABXPSTNInternational
PSTNFixed Network
BSC
IN
PrePaid
VMSVoicemail
HLR
MSC BSC
MSC SMSC
EIR
INTERNET
BSC
IN
PrePaid
VMSVoicemail
HLR
MSC BSC
PABXPSTNInternational
PSTNFixed Network
MSC SMSC
EIR
INTERNET
BSC
IN
PrePaid
VMSVoicemail
HLR
MSC BSC
PABXPSTNInternational
PSTNFixed Network
MSC SMSC
EIR
INTERNET
BSC
IN
PrePaid
VMSVoicemail
HLR
MSC BSC
PABXPSTNInternational
PSTNFixed Network
BSCBSC
Base Station ControllerBase Station Controller
The call request reaches the BSC from the The call request reaches the BSC from the BTS and is forwarded to MSC.BTS and is forwarded to MSC.
After call is established, the BSC will perform After call is established, the BSC will perform decodingdecoding of the call (in typical config.) of the call (in typical config.)
BSC HLR
MSC SMSC
EIR
INTERNETIN
PrePaid
VMSVoicemail
MSC BSC
PABXPSTNInternational
PSTNFixed Network
BSC HLR
MSC SMSC
EIR
INTERNETIN
PrePaid
VMSVoicemail
MSC BSC
PABXPSTNInternational
PSTNFixed Network
BSC HLR
MSC SMSC
EIR
INTERNETIN
PrePaid
VMSVoicemail
MSC BSC
PABXPSTNInternational
PSTNFixed Network
Checks A number.Checks A number. To whom is A subscriber calling?To whom is A subscriber calling?
(Checks B number)(Checks B number) Example : A subscriberExample : A subscriber has has
prepaid number.prepaid number.
MSC MSC
Mobile Switching CentreMobile Switching Centre
BSC HLR
MSC SMSC
EIR
INTERNETIN
PrePaid
VMSVoicemail
MSC BSC
PABXPSTNInternational
PSTNFixed Network
BSC HLR
MSC SMSC
EIR
INTERNETIN
PrePaid
VMSVoicemail
MSC BSC
PABXPSTNInternational
PSTNFixed Network
BSC HLR
MSC SMSC
EIR
INTERNETIN
PrePaidPrePaid
VMSVoicemail
MSC BSC
PABXPSTNInternational
PSTNFixed Network
Does the A subscriber have Does the A subscriber have money left on his/her account?money left on his/her account?
When the call is established When the call is established and on-going the subscriber’s and on-going the subscriber’s account is decremented account is decremented accordingly.accordingly.
PrePaid NodePrePaid Node
BSCHLR
MSC SMSC
EIR
INTERNETIN
PrePaid
VMSVoicemail
MSC BSC
PABXPSTNInternational
PSTNFixed Network
BSCHLR
MSC SMSC
EIR
INTERNETIN
PrePaid
VMSVoicemail
MSC BSC
PABXPSTNInternational
PSTNFixed Network
BSCHLR
MSCMSC SMSC
EIR
INTERNETIN
PrePaid
VMSVoicemail
MSC BSC
PABXPSTNInternational
PSTNFixed Network
Where is the B subscriber?Where is the B subscriber? MSC interrogates in HLR.MSC interrogates in HLR.
(HLR = Home Location (HLR = Home Location Register)Register)
MSCMSC Mobile Switching CentreMobile Switching Centre
BSCHLR
MSCMSCIN
PrePaid
VMSVoicemail
MSC BSC
PABXPSTNInternational
PSTNFixed Network
SMSC
EIR
INTERNET
BSCHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
HLR says ’I am the home of the B HLR says ’I am the home of the B subscriber and I know where he/she is subscriber and I know where he/she is right now’ (i.e. which VLR)right now’ (i.e. which VLR)
Tells this VLR ’Give me a visitor address Tells this VLR ’Give me a visitor address for this subscriber’ (Roaming Number) for this subscriber’ (Roaming Number)
HLRHLRHome Location Register
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSCMSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
Hosting MSC/VLR returns Hosting MSC/VLR returns TEMPORARILY assigned visitor/roaming TEMPORARILY assigned visitor/roaming address for B-subscriber to HLR.address for B-subscriber to HLR.
MSCMSC
Mobile Switching CentreMobile Switching Centre
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
’’Thanks for the visitor address!’Thanks for the visitor address!’ ’’I will send this address to the I will send this address to the
MSC that requested for it.’ MSC that requested for it.’
HLRHLRHome Location Register
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
’’Thank you, HLR!’Thank you, HLR!’ Speech connection path will set Speech connection path will set
up now towards the MSC/VLR up now towards the MSC/VLR where the B subscriber is where the B subscriber is presently located.presently located.
MSCMSC
Mobile Switching CentreMobile Switching Centre
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
Sets up a speech connection towards Sets up a speech connection towards BSC.BSC.
Delivers B-subscriber ID to BSC and asks Delivers B-subscriber ID to BSC and asks to page for the subscriber using that ID.to page for the subscriber using that ID.
MSCMSC
Mobile Switching CentreMobile Switching Centre
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
BSC now sends a PAGING MESSAGE to all the BTSs that it BSC now sends a PAGING MESSAGE to all the BTSs that it covers/controls.covers/controls.
Carrys PAGING RESPONSE from called MS back to MSC.Carrys PAGING RESPONSE from called MS back to MSC. Allocates a RADIO channel through a BTS with best Allocates a RADIO channel through a BTS with best
available and allowable SIGNAL STRENGTH for called MS.available and allowable SIGNAL STRENGTH for called MS. Performs SPEECH CODING when call is established.Performs SPEECH CODING when call is established.
BSCBSC
Base Station ControllerBase Station Controller
BSCHLRHLR
MSCMSC
MSC BSC
PABXPSTNInternational
PSTNFixed Network
IN
PrePaid
VMSVoicemail
SMSC
EIR
INTERNET
Thank You