Unit 3 it6601 presentation
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Transcript of Unit 3 it6601 presentation
![Page 1: Unit 3 it6601 presentation](https://reader037.fdocuments.net/reader037/viewer/2022110108/58ed0e671a28ab405e8b4659/html5/thumbnails/1.jpg)
IT6601 MOBILE COMPUTING
G.VADIVELMURUGAN
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SYLLABUS: UNIT -3
Global System for Mobile Communication (GSM)
General Packet Radio Service (GPRS)
Universal Mobile Telecommunication System (UMTS)
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Contents of PresentationGPRS and its FeaturesGPRS Network Architecture GPRS Protocol ArchitectureGPRS ServicesGPRS Applications
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Constraints with existing network
• Data Rates too slow – about 9.6 kbps• Connection setup time too long • Inefficient resource utilization for bursty traffic• Proves expensive for bursty traffic utilization• No efficient method for packet transfers
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Comparison of GSM & GPRS
GSM GPRSData Rates 9.6 Kbps 14.4 to 115.2
KbpsModulation Technique
GMSK GMSK
Billing Duration of connection Amount of data transferred
Type of Connection Circuit – Switched Technology
Packet - Switched
Technology
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What is GPRS ?General Packet Radio Service (GPRS) is a new bearer
service for GSM that greatly improves and simplifies wireless access to packet data networks
GPRS applies packet radio principal to transfer user data packets in an efficient way b/w MS & external packet data network
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Benefits of GPRS
New Data ServicesHigh Speed (Data Rate 14.4 – 115 kbps)Efficient use of radio bandwidth (Statistical Multiplexing) Circuit switching & Packet Switching can be used in parallelConstant connectivity
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GPRS Network Elements
GPRS Architecture is same as GSM except few hardware modifications :
GPRS includes GSNs SGSN : Serving GPRS Support Node GGSN : Gateway GPRS Support Node
GPRS Register
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GSM SYSTEM ARCHITECTURE
MS
BTS
PSTNISDNPDN
BSC
BSC
MSC/VLR
MS
MS
BTS
BTS
GMSC
EIRAUC
HLR
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GPRS SYSTEM ARCHITECTURE
BSC
SGSN
MS
BTS
BTS
Other GPRSPLMN
GGSN
PDN
Gb
GdGp
Gn
Gf
Gs
Gc
GGSN
EIR HLR+GPRS Register
MSC/VLR
D
SMS-GMSCSMS-INMSC
Gi
Gr
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InterfacesGb – Connects BSC with SGSNGn – SGSN – SGSN/GGSN (in the same network)Gp – SGSN –GGSN (in different networks)Gf – For equipment querying at registering timeGi – Connects PLMN with external Packet Data
Networks (PDNs)Gr – To exchange User profile between HLR & SGSNGs – To exchange Database between SGSN & MSCGd – Interface between SMS & GPRS
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SGSN – Serving GPRS Support Node• Delivers data packets to mobile stations & vice-versa
• Detect and Register new GPRS MS in its serving area
• Packet Routing, Transfer & Mobility Management
• Authentication, Maintaining user profiles
• Its location register stores location info. & user profiles
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GGSN – Gateway GPRS Support Node• Interfaces GPRS backbone network & external packet
data networks• Converts the GPRS packets from SGSN to the PDP
format• Converts PDP addresses change to GSM addresses of
the destination user
• Stores the current SGSN address and profile of the user in its location register
• Performs authentication
• Many-to- many relations among SGSNs & GGSNs
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GPRS Register
GPRS Register is integrated with GSM-HLR.Maintains the GPRS subscriber data and Routing information.Stores current SGSN address
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GPRS Services• Offers end-to-end packet switched data transfer• Bearer Services
• PTP - Point-To-Point service (CLNS mode)• PTM - Point-To-Multipoint service(CONS Mode)
• PTM-M Multicast service• PTM-G Group call service
• Supplementary Services • SMS Short Message Service• CFU Call Forwarding Unconditional
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GPRS Services (Contd.)Quality of Service
• GPRS allows defining QoS profiles• Service precedence, reliability, delay, throughput
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Applications of GPRSWeb browsingCorporate & Internet Email Vehicle PositioningRemote LAN AccessHome AutomationDocument Sharing/Collaborative working
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Universal Mobile Telecommunication Standard(UMTS)
The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard.
Circuit- and Packet-Oriented ServicesUMTS uses wideband code division multiple access
(W-CDMA) radio access technology to offer greater spectral efficiency and bandwidth to mobile network operators
High data rates and improves the quality of service
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UMTS Network Architecture
User Equipment:A mobile station or cell phone contains two major components,- SIM- Mobile DeviceRadio Network Subsystem: The RNS is the equivalent of the GSM Base Station Subsystem.Core Network:The core network is the equivalent of the GSM Network Switching
Subsystem.
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20
UMTS Network Architecture
USIM
ME
Node BNode B
RNC
Node BNode B
RNC
MSC/VLR GMSC
SGSN GGSN
HLR
UTRAN CNUE
Exte
rnal
N
etw
orks
Cu
Uu
Iu
Iub
Iur
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THANK YOU