This assignment is due no later than 6:20 p.m. on Tuesday, 3 December.
This homework assignment has six questions; answer all of them. Answers
should no longer than half a page, or around 100 to 150 words. Please site
references you use to answer your questions, including the textbooks you’re using.
Your homework may turned-in on paper or via rclayton@monmouth.edu by
email. If you mail your assignment, please submit a printable document
— a PostScript .ps or PDF .pdf document, for
example — and not a source document — a
Word .docx or Latex .tex document, for example. Make sure you mail a
printable document by the deadline.
-
Your networking consultancy is hired to design a sensor system to monitor (a) a
bridge, (b) a pipeline, and (c) a skyscraper (these are three separate jobs).
For each of these environments, propose three different types of sensors and
explain briefly how each sensor would be useful for the monitoring task.
Note that the monitoring task is not defined. Good answers will assume a
plausible monitoring task as part of the answer.
-
Explain how the scheduling techniques FIFO, priority-based, EDF, and
round-robin work in a sensor mote.
-
Of what use is the MAC (media-access controller) sublayer in a sensor network?
Give examples.
-
Consider line-of-sight and non-line-of-sight transmissions.
- What is the relation between frequency and line-of-sight vs
non-line-of-sight transmissions (i.e., compare low and high frequency
transmissions)?
- Cell phones use line-of-sight transmission. How can your cell phone
work when surrounded by skyscrapers?
- What type of transmission (line-of-sight or non-line-of-sight) would
you expect GPS satellites to use? Justify your answer.
-
Of what use is a transport layer in a sensor network? Give some examples.
-
Explain why TCP might not work well when used in a sensor network. Hint:
consider the congestion control algorithm.
This page last modified on 2013 December 3.