Home Page Vahid Tabatabaee

ENEE 426

Spring2007

Communication Networks

Schedule/Location

Time: Tu-Th 2:00-3:15
Room: EGR 1108

Instructor

                Vahid Tabatabaee
                Office: AVW 4165
                Phone:
                Email: vahidt at umd dot edu

Office hours

Monday 11:00-12:00 AM, Tuesday 3:30-4:30

Text Book:

A. Leon-Garcia and I. Widjaja, Communication Networks, 2nd edition, McGraw Hill, 2004, ISBN 0-07-246352-X

Aboelela, Network Simulation Experiments Manual (for Peterson and Davie’s textbook Computer Networks), 3^rd edition, Morgan Kaufmann, 2003, ISBN 0-12-042171-2

Software:

OPNET IT Guru Academic Edition. Available free of charge at www.opnet.com/itguru-academic/mk-setup.html

Problem sets:

There will be 6-8 problem sets. The assignments will count 10% toward the course grade.

Laboratory exercises:

There will be 9 laboraotry exercise sets from the Aboelela book. They use OPNET IT Guru software. The lab exercises will count 10% toward the course grade. The lab exercisies will count 10% toward the course grade.

Examinations:

Midterm examinations: There will be two midterm examinations in class during the semester. Each exam will count 25% toward the course grade.

Final examination: It will be cumulative but weighted toward the last third of the course and count 30% for the course grade.

Announcements:

Problem set 1 (due Feb. 15) : Chapter2 problems: 15-16-18-19-20-21-34-39

In all problems if size of IP and TCP header is not given assume each one is 20 bytes.
In Problem 39: To set the default route for a network, we use host ID 0 in the routing table. Therefore, a table entry with (2,0) can be used for all hosts in netwrok 2.
In Problem 39: Suppose in a routing table we have one entry for a specific host in a network, for instance host (2,1). We also have a default entry for the same network as (2,0). Then entry (2,1) is used for host one in network 2, while (2,0) entry is used for all other hosts in the same network.

The first midterm exam is on Tuesday March 6. It will cover chapter 1-5.
Problem set 2 (due Feb. 20) : Chapter 3 problems: 56, 57, 58, 62, 63.
Problem set 3 (due Feb. 27) : Chapter 4 problems: 8, 10,12, 13, 20, 22.

In Problem 13, the nominal payload rate for STS-1 is 50.112 Mbps.
In Problem 20, MPEG2 bit rate is 5 Mbps.
In Problem 22, use eq. 3.41 in the text book.
In Problem 4.20, consider the total bandwidth in the region arounf 1550 nm is 12.49 THz.
In Problem 4.22, there is a typo, it should be figure 4.08 not figure 4.18.

Problem set 4 : Chapter 5 problems: 16, 18, 20, 33, 36
Problem set 5 (due March 27) : Chapter 5 problems: 74, 75, 76. Chapter 6 problems: 4, 10, 15. Lab 0 and Lab 1 in the Network Simulation Experiments Manual. Direction for the report format are given on p. 5 of the Maual.
The second midterm exam is on Tuesday April 24.
Problem set 6 (due April 5) : Chapter 6 problems: 16, 37, 44, 49. Lab 2 from the Network Simulation Experiments Manual.
Extra class on Monday April 2 at 5:00 pm will be held in EGR 0108.
Problem set 7 (due April 12) : Chapter 6 problems: 6.52, 6.53. Chapter 7 problems: 7.12, 7.17, 7.19. Lab 3 from the Network Simulation Experiments Manual.
Problem set 8 (due April 19): Chapter 7 problems: 7.31, 7.32, 7.33, 7.41, 7.42, 7.51. Lab 9 from the Network Simulation Experiments Manual. In problem 7.51 all queues have same weight. For problem 7.42 If T has exponential distribution with mean 1/mu, then Pr[t0<T<t1]=exp(-mu . t0) - exp(-mu . t1). This relation helps you to find probability of having k cells in a burst in part b.
Problem set 9 (due May 3) : Chapter 8 problems: 8.6, 8.7, 8.12, 8.18, 8.24
Extra class on Monday April 30 at 5:00 pm will be held in EGR 0108.
Problem set 10 : Chapter 8 problems: 8.29, 8.30, 8.33, 8.49, 8.61

Problem Solutions:

   Topics and Slides:
        Here is a potential list of topics: syllabus

        Chapter 2: Applications and Layered Architecture
        Chapter 3: Error Detection and Correction
        Chapter 4: Multiplexing SONET and WDM
        Chapter 5: ARQ Protocols and Reliable Data Transfer Services
        Chapter 5: Data Link Control Protocols and Statistical Multiplexing
        Chapter 6: Medium Access Control Protocols
        Chapter 6: Local Area Networks
        Chapter 7: Packet Switching Networks
        Chapter 8: TCP/IP

Academic Integrity

The University of Maryland, College Park has a nationally recognized Code of Academic Integrity, administered by the Student Honor Council. This Code sets standards for academic integrity at Maryland for all undergraduate and graduate students. As a student you are responsible for upholding these standards for this course. It is very important for you to be aware of the consequences of cheating, fabrication, facilitation, and plagiarism. For more information on the Code of Academic Integrity or the Student Honor Council, please visit http://www.shc.umd.edu.

To further exhibit your commitment to academic integrity, remember to sign the Honor Pledge on all examinations and assignments: "I pledge on my honor that I have not given or received any unauthorized assistance on this examination (assignment)."