1. ECE 6610: Wireless Networks
Raghupathy Sivakumar

2. Handouts Class information (online) Schedule (online) 0th assignment
Feedback

3. Goals Fundamental concepts in wireless network protocols
Impact of wireless networks on the different layers of the network protocol stack
Theoretical and practical (programming intensive) exposure to problems and solutions in wireless network protocols

4. Requirements Thorough knowledge of the OSI protocol stack*
Knowledge of the TCP/IP protocol suite and associated protocols*
Highly proficient in programming (C and C++)
* See 0th assignment

5. Administrative Information
Raghupathy Sivakumar
Room 5164, Centergy
Phone:
Office hours: By appointment
Class website

6. Administrative … (contd.)TA
Richelle V. Adams
Office hours:
11am – noon, Tu & Th
449 VL

7. Policies
Lecture slides available on website by 12noon on the day of class
Lecture slides are NOT comprehensive – students are expected to attend classes to “fill in” information
Miss classes at your own risk. Professor and TAs will not be responsible for any information you might not have because of a missed class
Zero tolerance policy toward cheating

8. Textbook No textbook Primary material:
Class discussions + slides
Reading list available for additional material
For regular students, reading list not mandatory material

9. Overview OSI Protocol Stack TCP/IP Protocol Suite
Introduction to Wireless Networks
Medium Access Control
Scheduling
Network
Transport
Ad-hoc Networks
Sensor Networks
Middleware and Applications
Miscellaneous
and … Puzzles!!

10. Grading Exams Assignments Project Other 2 midterms (2 x 15% = 30%)
1 final (1 x 35% = 35%)
Assignments
4 programming (4 x 5% = 20%)
Project
1 mini-project (1 x 10% = 10%)
Other
Class participation (1 x 5% = 5%)

11. Programming Assignments
20% of your final grade
All programming assignments based on the ns2 network simulator
ns2 tutorial as part of lecture schedule

12. Programming Assignments
Groups of 3
Try to choose students with complementary skills
All programming assignments are very difficult. Please start early to avoid problems.

13. Project 1 mini-project 10% of your final grade
Opportunity to work on real wireless testbeds
Project options will be given to you
Deliverables: Preliminary report, demonstration and results, final report

14. Assignments and Projects
All assignments and projects will involve a peer-review process
Each student will send TA an evaluation of the contribution of each other student in the group (evaluation will remain confidential)
Final grade of student will depend on the peer-review rating as well

15. Distance Learning Students
No programming assignments or project
4 theory assignments in-lieu of the programming assignments
Each theory assignment worth 5% of final grade
Each assignment will involve the review and critique of two papers from the reading list
1 final theory assignment worth 10% of final grade – assignment will be specified

16. ns2 Network Simulator
The most widely used network simulator in the academic community
Open source, C++/Tcl based
Several online resources available
Very large and unwieldy piece of software with insufficient documentation (>50000 lines of code)
TA or research student will provide a 2-3 lecture tutorial as part of the regular class-hours - PLEASE DO NOT FAIL TO ATTEND

17. Schedule All deadlines for distance learning students will
be two weeks after the regular deadlines

18. References, Reading Material, and Lecture Notes
Most references – research papers in the concerned area. Available online.
A few textbooks will also be referred to:
Richard Stevens, TCP/IP Illustrated
Douglas Comer, Internetworking with TCP/IP
Andrew Tannenbaum, Computer Networks
Follow lecture slides and class discussions closely

19. Outline
OSI protocol layers
Puzzle!
Recap

20. Communication Networks
Broadcast networks
Each station can hear every other station in the network (fully connected network)
Switched networks
Stations interconnected through a (non-fully) connected mesh
Packet switched vs. Circuit switched
What kind of a network is the Internet?

21. Communication Protocols
Rules used in communication
Monolithic vs. Layered
Protocol data units – used to exchange information between peer layers of protocol stack
Examples of communication protocols?

22. OSI
Open Systems Interconnection: ISO (International Standards Organization)’s standard for communication protocols
Also referred to as the OSI reference model or simply the OSI model
7 layer protocol stack

23. OSI Protocol Stack Physical Data link Network Transport Session
Presentation
Application

24. OSI (contd.)
Physical: mechanical/electrical rules for transferring bits
Data link:
flow control
error detection
error recovery

25. OSI (contd.) Network Transport Routing Congestion control
Quality of service
Transport
End-to-end communication of data
Reliability
Sequencing
Flow control

26. OSI (contd.) Session Presentation Application
Application specific functionality
Still, generic to multiple applications (e.g. security)
Presentation
Data formatting
Application

27. TCP/IP Protocol Suite Differences between OSI and TCP/IP? 5 layers:
Physical
Data link/MAC (ARP, SLIP)
Network (IP, ICMP, IGMP)
Transport (TCP, UDP)
Application (http, ftp, telnet, smtp)

28. Puzzle You have an unfair coin (prob(H) = p != ½)
How will you generate a fair toss?

29. Recap Class goals and overview Grading and other administrative stuff
Communication networks
OSI Protocol Stack