VIT UNIVERSITY :: VELLORE -632014 MOBILE COMMUNICATION mail:rknadesh@vit.ac.in Mobile : 9976235202

Overview of the Lecture Use-cases, applications Definition of terms Challenges, history Wireless Transmission frequencies & regulations signals, antennas, signal propagation multiplexing, modulation, spread spectrum, cellular system Media Access motivation, SDMA, FDMA, TDMA (fixed, Aloha, CSMA, DAMA, PRMA, MACA, collision avoidance, polling), CDMA Wireless Telecommunication Systems GSM, HSCSD, GPRS, DECT, TETRA, UMTS, IMT-2000 Satellite Systems GEO, LEO, MEO, routing, handover

Contd.. Broadcast Systems Wireless LANs Network Protocols DAB, DVB Wireless LANs Basic Technology IEEE 802.11a/b/g, .15, Bluetooth Network Protocols Mobile IP Ad-hoc networking Routing Transport Protocols Reliable transmission Flow control Quality of Service Support for Mobility File systems, WWW, WAP, J2ME, ...

Reference Books Mobile Communicaton- Jochen Schiller Wireless Communication and Networks – William Stallings Wireless Communication – Rappaport

Definitions 2 kinds of Mobility USER MOBILITY DEVICE PORTABILITY

Communication Device –Characteristics FIXED & WIRED MOBILE & WIRED FIXED & WIRELESS MOBILE & WIRELESS

APPLICATIONS VEHICLE EMERGENCIES BUSINESS REPLACEMENT OF WIRED NETWORK INFOTAINMENT LOCATION AWARE SERVICES

MOBILE / WIRELESS DEVICES SENSOR EMBEDDED CONTROLLERS MOBILE PHONES PDA LAPTOP

OPEN RESEARCH TOPICS INTERFERENCES REGULATIONS & SPECTRUM LOW BANDWIDTH HIGH DELAY/LARGE DELAY VARIATION LOWER SECURITY AD-HOC NETWORK ROUTING , SCALABILITY, RELIABILITY,MOBILITY

UMTS, WLAN, DAB, GSM, cdma2000, TETRA, ... ad hoc Personal Travel Assistant, DAB, PDA, laptop, GSM, UMTS, WLAN, Bluetooth, ... BACK

A simplifiled Reference Model Application Application Transport Transport Network Network Network Network Data Link Data Link Data Link Data Link Physical Physical Physical Physical Medium Radio

Contd.. Application layer Transport layer Network layer Data link layer Physical layer service location new applications, multimedia congestion and flow control quality of service addressing, routing, device location hand-over synchronization media access multiplexing Correction of transmission errors encryption modulation interference attenuation frequency

Total Coverage Chapter 10: Support for Mobility Chapter 9: Mobile Transport Layer Chapter 8: Mobile Network Layer Chapter 4: Telecommunication Systems Chapter 5: Satellite Systems Chapter 6: Broadcast Systems Chapter 7: Wireless LAN Chapter 3: Medium Access Control Chapter 2: Wireless Transmission