Mobile Networking
Concepts and Protocols
CNT 5517
Dr. Sumi Helal, Ph.D.
Professor
Computer & Information Science & Engineering Department
University of Florida, Gainesville, FL 32611
Some slides are adapted from Dr. Dave Johnson Notes
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Mobile Networking: Evolution and Protocols, Study notes of Wireless and Satellite Communication
An overview of the evolution of mobile networks, focusing on key concepts and protocols such as gsm, gprs, mobile ip, and wireless ip. It covers the historical development of mobile networks from the 1st generation to the 4th generation, discussing the frequency bands, data services, and standardization activities related to each generation.
Typology: Study notes
2014/2015
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Mobile Networking
Concepts and Protocols
CNT 5517
Dr. Sumi Helal, Ph.D.
Professor
Computer & Information Science & Engineering Department University of Florida, Gainesville, FL 32611 [email protected] Some slides are adapted from Dr. Dave Johnson Notes
Lecture Contents
• Evolution of Mobile Networks
• GSM
• GPRS
• Mobile IP
• Wireless IP
• QoS Issue
Mobile Network Evolution
(Cont’d)
rd
Generation Wireless (2000’s)
- Ex: UMTS in Europe, 114Kbps-2Mbps; CDMA2000 in the US, up to 2Mbps
- Better support for wireless data
- Mobile Internetworking, or wireless packet data (GPRS, EDGE, Mobile IP)
th
Generation Wireless (future)
- Wireless and Mobile Multimedia
- Smart Antenna, Spatial Division Multiple Access
- Research stage: ACTS , …
Generations of Terrestrial Commercial Wireless Systems Capability Enhancements^ Time by Generation Mobile telephone Analog cellular technology Macro cells Digital voice, messaging & data services Fixed wireless loop, wireless LAN services Digital cellular & PCS Macro, micro & pico cells Greatly enhanced data communications services Narrowband and wideband multimedia services Higher spectrum for wideband applications Macro, micro & pico cells Very high bit rate (> 2 Mb/s) multimedia enhancements 1980 1990 2000 2010 1GW 2GW 3GW 2020 IMT-2000 and Beyond Future Evolution Time 1980 1990 2000 2010 2020 Globalization Nat ’l Reg ’L Int ’l Historical (2G) Recent Past (3G) Current and Future (3G and Beyond) Standardization Activities Relative to the Generations
Mobile Networking Evolution
< 20Mbps < 2Mbps < 2Mbps < 384kbps < 144kbps NA < 10kbps Data service Bandwidth ITU-R (WP8F/ WP8D)
ITU-R
(TG8/1),
3GPP/3GPP
SDO
(IETF,ETSI)
Nation- based Main Organizer same services as fixed telecomm. Voice phone, High rate data (web surfing) Voice phone, Low bit rate data (short msg.) Voice phone Main Services 1st 2nd 3rd 4th
GSM : Global System for Mobile communication
- Configuration
- MS : ME (IMEI-International Mobile Equipment Identity) + SIM
(IMSI-International Mobile Subscriber entity)
- BSS : BTS(Radio transceiving, Handling radio-link protocols) +
BSC(Radio channel setup, frequency hoping, handover)
- NS : Handling subscriber(user using SS7, registration,
authentication, location updating, handover, call routing to a
roaming) + Switching(connecting to fixed net. )
- Air link
- Uplink(890~915MHz)/Downlink(935~960MHz)
- FDMA(25MHz = 124carriers * 200kHz) + TDMA(burst period :
15/26ms)
GSM Protocol
CM: Comm Mngr MM: Mobility Mngr RR: Radio Resource mngr
GPRS: General Packet Radio System for GSM
- Configuration
- MS
- BS
- GSN/VLR/HLR
- GSN: GPRS Support Node
- SGSN: Serving GSN Node
- GGSN: Gateway GSN Node
- Air Link interface
- GMSK -> EDGE -> WCDMA
- Paging: battery power reduced
- Registration, authentication, handoff
GPRS Protocol Stack
RLC : Reliable Link Controller, SNDCP : Sub‐network Dependent Convergence Protocol BSSGP : Base Sta?on System GPRS Protocol, GTP : GPRS Tunneling Protocol,
Reliable Link Controller
CDMA Network Architecture
RAN : Radio Access Network, PCF : Packet Control Func?on PDSN : Packet Data Serving Node
Mobile-IP
• Internet Protocol (IP)
– Connectionless packet delivery
– Unreliable delivery
– IP host addresses consist of two parts
- network id
- host id
– By design, host address is tied to its
network
IETF Mobile IP Protocol
• IETF = Internet Engineering Task Force:
Standards development body for the Internet
• Mobile IP allows a host to have a unique
(location-independent) IP address.
• Each host has a home agent on its home
network.
- The home agent forwards IP packets when mobile host away from home.