1. IT 351 Mobile &Wireless Computing Semester 2, 2012-2013 Dr. Hala Mokhtar HMOKHTAR@KSU.EDU.SA Room 79- 2nd floor

2. Module Overview Module Overview Objectives: – To provide an introductory overview of the module and discuss the involved concepts.

3. Course overview This course will examine the area of mobile and wireless networking, looking at the unique network protocol challenges and opportunities presented by wireless communication and host or router mobility. Although this course will touch on some of the important physical layer properties of radio and infrared communications, it will focus on network protocols above the physical layer, with an emphasis on the media access control, network and transport protocol layers. Aims: –To develop an understanding of the theory and practice of building wireless and mobile networks. –To provide an in-depth study of the requirements of wireless / mobile communications, including the development of standards for wireless networks. –To examine current developments associated with wireless communications and mobile networks.

4. Learning Outcomes After completing the module you should be able to: –Explain the main issues and challenges associated with wireless radio communications – Physical layer –Describe the architecture of GSM cellular system and understand its operation –Differentiate between the different satellite systems and describe their advantages and disadvantages –Describe the architecture, protocols and major issues of wireless LANs –Describe the architecture and operation of Bluetooth networks

5. Learning Outcomes (cont.) –Explain the main concept of Mobile-IP and its main problems –Describe and analyze the different internetworking challenges and solutions in wireless mobile networks- Network and Transport Layers. –Search for information relevant to networking concepts.

6. #Student Outcome addressed by the course Level of Contribution (h) Recognition of the need for, and an ability to engage in, continuing professional development; L (j) An ability to use and apply current technical concepts and practices in the core information technologies; M (m)An understanding of best practices and standards and their application;H Student Outcomes

7. Assessment Details (to be discussed) Minimum pass mark 60%. –15% Mid Exam –15% Lecture Quiz –20% Assignments –10% Homework –40% Final exam

8. Recommended reading Text books: –Schiller, J. (2003) 'Mobile Communications', 2nd Edition, Addison-Wesley (Pearson), 9780321123817 [Primary] –Stallings, W. (2005) 'Wireless Communications and Networks', 2nd Edition, Prentice Hall (Pearson), 9780131918351 Course Notes Copies of lecture slides along with other relevant material will be available via wordpress blog: http://it351.wordpress.com/ Electronic resources A large number of resources exist on the Internet. These include book chapters, academic papers, FAQs, online workshops, programs and other relevant material from academic institutes around the world.

9. Outline Syllabus Introduction & History Physical Layer: Wireless Radio Communications MAC Layer & Architectures Overview –Telecommunication Systems (GSM,UMTS) –Satellite Systems –Wireless LAN – AdHoc and Bluetooth Mobile Network Layer: IP and Addressing Issues Mobile Transport Layer: TCP and Transport Issues Application Layer

10. Module Overview - Terminology Mobile (On the Move, Anywhere, Anytime) –Mobile computers do not have to be wirelessly connected, e.g. a Laptop being plugged in to the university Ethernet network. –Mobile computers must be able to change their point of attachment. Wireless (Connecting without Wires) –Wireless computers don’t have to be mobile, e.g. a wall mounted sensor (CCTV Camera). Wireless computers are not connected to the network physically.

11. Module Overview - Terminology Two aspects of mobility: –user mobility: users communicate (wireless) “anytime, anywhere, with anyone” –device portability: devices can be connected anytime, anywhere to the network Wireless vs. mobile Examples  stationary computer  notebook in a hotel wireless LANs in historic buildings Personal Digital Assistant (PDA) The demand for mobile communication creates the need for integration of wireless networks into existing fixed networks: –local area networks: standardization of IEEE 802.11 –Internet: Mobile IP extension of the internet protocol IP –wide area networks: e.g., internetworking of GSM and ISDN, VoIP over WLAN and POTS

12. Module Overview - Terminology Wireless Applications –Networked applications based on nodes that use wireless communications to share information with other wireless nodes or with a wireless network infrastructure. Wireless Architecture –The components of a network system that together make up an infrastructure to support wireless nodes, including the software and hardware of nodes, access points, routers, etc.

13. Module Overview –Wireless & Mobility Challenges Low & variable bandwidth Severe power restrictions Storage and interface constraints Security and data risks Address migration Location dependent information Heterogeneity. And many others…

14. Module Overview - Issues Communications –OSI Layers 1 and 2 (Physical & Data Link) –The ‘enabler’ of wireless to provide networking –Features include: Managing the ‘air’ interface Low level access controls Power and energy control –Spectrum management –Medium access protocols

15. Module Overview - Architectures Architectures –Fixed-Wireless Main component is Fixed network Wireless ‘at the edge’ E.g. Wireless LAN –Cellular Special case of Fixed-Wireless Large scale WAN, network is partitioned into cells E.g. GSM –Ad-Hoc No infrastructure or central control unit Bluetooth networks, sensor networks

16. Module Overview - Issues Internetworking –OSI Layers 3 and 4 (Network & Transport) –The ‘glue’ binding wireless links to apps. –Features include: Global Addressing scheme End-to-End routing scheme Congestion and Flow control Security Quality of Service (QoS) Ad Hoc network control

17. Module Overview - Applications Applications of Wireless –Same as fixed networks Web browsing, file sharing, etc. –Outdoors and on-the-move computing Laptop on the train, WAP on mobile phone etc. –Location-based services City guides, context shopping, GPS etc. –Pervasive and Ubiquitous Computing Networked Appliances, Sensor Networks, Smart Spaces