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Fall 2015

IC636: Wireless Networks (Fall 2015)

Kyung-Joon Park
Office hours: By appointment, E3-513 DGIST


  • No required textbook

Course Description:
Several major topics related to wireless networking will be covered, including a brief overview of physical layer issues, multiple access, TCP over wireless, and routing protocols for wireless LANs and ad hoc networks, sensor networks, and some security-related issues.

Grading policies:
Exam 70%, Homework 30%


  • Reading assignment 1: Compare the key idea in "No time to countdown: Migrating backoff to the frequency domain" with the basic backoff mechanism in the Bianchi's paper. Please submit an one-page summary (due: September 24).
  • Homework: In each case of the slotted and unslotted basic MAC protocols, calculate the optimal value of n (number of hosts) that attains the maximum throughput when the channel access probability p is fixed (due: October 1).
  • Reading assignment 2: Summarize the key differences between the single-hop model in "On the capacity of wireless CSMA/CA multihop networks" and that in the paper by G. Bianchi (December 10).
  • Homework: Submit your summary why two-hop relay is better than direct communication in mobile ad hoc networks (December 10).
    • Hint: Find "interference-limited" and "distance-limited" in this paper
  • Homework: Carry out simulation of the Bianchi's model when m = 1 with small numbers of the backoff window size (due: Before the final exam).


  • [September 1] Introduction to physical layer issues
  • [September 3] Introduction to physical layer issues (cont'd)
  • [September 8] Medium access control - Basic MAC protocol
  • [September 10] Medium access control - Slotted and unslotted accesses, slot size selection
  • [September 15] Carrier sense
  • [September 17] Tradeoff between carrier sense and transmit power
  • [September 18] Collision avoidance (makeup class)
  • [September 22] No class
  • [September 24] Medium access control - Virtual CS
  • [September 29] No class (Chuseok (민족최대의 명절인 추석 연휴))
  • [October 1] Transmission opportunity and throughput with carrier sensing
  • [October 5] Special lecture on battery management of smart devices by Prof. Kyunghan Lee at UNIST
  • [October 6] Medium access control - Backoff mechanism
  • [October 8] No class
  • [October 13] Backoff mechanism and fairness issues
  • [October 15] Rate control and power control
  • [October 20] Midterm exam
  • [October 27] Capacity of wireless networks
  • [October 29] Understanding the capacity-delay tradeoff in wireless networks
  • [November 3] No class (ACM SenSys 2015)
  • [November 5] No class
  • [November 6] Switch architecture and switching algorithms (makeup class)
  • [November 10] No class (2015 MathWorks Asian Research Faculty Summit)
  • [November 12] Wireless scheduling
  • [November 17] Wireless scheduling (cont'd) and performance analysis of IEEE 802.11 DCF
  • [November 19] Fixed point analysis of IEEE 802.11 DCF
  • [November 24] Fixed point analysis of IEEE 802.11 DCF (cont'd) and routing in wireless networks
  • [November 26] No class (Civil Defense)
  • [December 1] No class (Visit from IITP to check the progress of Resilient CPS Research Center)
  • [December 3] Routing in wireless networks and paper presentation by students (Class begins at 1 pm)
  • [December 8] Paper presentation by students (cont'd) (Class begins at 1 pm)
  • [December 10] Paper presentation by students (cont'd)
  • [December 15] Final exam

Reading list:

Network capacity

Performance analysis of IEEE 802.11 DCF


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Page last modified on December 03, 2015, at 07:49 PM EST