CS6311 Mobile Network Protocols Prof. Cormac J. Sreenan Dr. Mustafa Al-Bado Dr. Mahtab Hossain Copyright Notice: The CS6311 lecture notes include material that is copyrighted and must not be copied or distributed without permission. They include material by C. Sreenan, X. Wu, A. Zahran, J. Schiller, W. Stallings and others. University College Cork CS6311 1 Instructor Details Email • • For Prof. Sreenan: [email protected] Always put CS6311 in “Subject” line of message and send from your UCC email address Office Hours • For Prof. Sreenan: normally Tuesdays 3-4pm, or by appointment (better!). Room 1-75. University College Cork CS6311 2 Course Information CS6311 is a 5-credit module • • Exams • • 24 lectures plus practical laboratory sessions Two lectures per week (Period 1 only) Mid-module exam 35% (Week 7) End-of-module exam 35% (Week 13) Other assessment (details to be provided) • • Lab. assignments 15% Survey paper 15% University College Cork CS6311 3 Reference Books Stallings - Wireless Communications & Networks 2nd Edition 2005 Garg - Wireless Communications and Networking 1st Edition 2007 Schiller - Mobile Communications 2nd Edition 2003 University College Cork CS6311 4 Resources Course website • • • www.cs.ucc.ie/~cjs/teach/CS6311 Lecture notes added as the course progresses; also lab. details Research papers/reports as recommended in lectures Also check out related research activity • • UCC’s Mobile & Internet Systems Lab (MISL) www.cs.ucc.ie/misl University College Cork CS6311 5 Vision Computers are integrated and offer converged services • • small, cheap, portable, replaceable cloud-based processing and storage Technology is in the background • • • aware of the environment and adapt (“context awareness”) recognize the location of the user and react appropriately (“location awareness”) Internet of “Things” University College Cork CS6311 6 Enabled by Technology Advances more computing power smaller lower-power devices new user interfaces for small dimensions higher network data rates multiple network interfaces sophisticated multimedia processing built-in sensor capability always connected University College Cork CS6311 7 Portable –v- Wireless -v- Mobile Portable - a device that can be moved easily • Wireless - no wires needed for communication • • E.g. Laptop computer E.g. PCs deployed in a historic building Our focus is radio frequency (RF), alternatives include optical, infra-red Mobile - the ability to continue to communicate while moving Demand for mobile communication creates need to integrate wireless networks with the fixed networks such as the Internet University College Cork CS6311 8 Some Mobile Applications Vehicles & Transportation Road condition, guidance, accident avoidance • Travelling salesman Mobile office; access to central databases • Fixed network replacement Trade shows; historic buildings • Tourism & Entertainment Tour/museum guide; multi-player games; music • Emergencies and Disasters University College Cork CS6311 9 Effects of device portability Power consumption • Loss of data more likely (theft, dropping) Limited user interfaces • limited computing power, low quality displays, less storage compromise between size of fingers and portability Limited memory • limited value of mass memories with moving parts University College Cork CS6311 10 Wireless Networks -v- Fixed Networks Higher loss-rates due to interference Restrictive regulations of radio frequencies Lower data rates Higher delays, higher delay variation (jitter) Security attacks are easier Shared transmission medium University College Cork CS6311 Early history of wireless communication The Irish connection! • • 1896 Marconi (first demonstration of wireless telegraphy) – born in Italy, mother and wife from Ireland! 1901 (first transatlantic wireless signal: Cornwall to Canada, with monitoring station at Crookhaven, West Cork) 11 Wireless Network Evolution University College Cork CS6311 13 Course Overview Course adopts a bottom-up approach, moving from physical layer, to link layer, then network and transport layers Networking primer • • Basic refresher on undergraduate data networking topics For independent review by each student Wireless fundamentals • Network architecture, wireless signal transmission and propagation University College Cork CS6311 14 Course Outline Medium access control • • Mobility and routing • Including Mobile IP TCP in wireless and mobile networks • Scheduled and on-demand techniques Case study: 802.11 (WiFi) Reliability and congestion effects Special topics (time permitting) from: • • Opportunistic networking, Participatory sensing Wireless sensor networks, wireless multimedia University College Cork CS6311 15
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