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  T215A: Communication and information technologies (I) Fall 2016/2017 ______________________________________________________________________________ Tutor-Marked Assignment _____________________________________________________________________________ Cut-

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تاريخ التسجيل : 22/08/2016

مُساهمةموضوع: T215A: Communication and information technologies (I) Fall 2016/2017 ______________________________________________________________________________ Tutor-Marked Assignment _____________________________________________________________________________ Cut-   الأربعاء أكتوبر 26, 2016 12:54 pm

T215A: Communication and information technologies (I)
Fall 2016/2017
Tutor-Marked Assignment
Cut-off date: TBA
Total Marks: 100
TMA Contents
Question 1 (40 marks)
Question 2 (20 marks)
Question 3 (16 marks)
Question 4 (24 marks)
Plagiarism Warning:
As per AOU rules and regulations, all students are required to submit their own TMA work and avoid
plagiarism. The AOU has implemented sophisticated techniques for plagiarism detection. You must
provide all references in case you use and quote another person's work in your TMA. You will be
penalized for any act of plagiarism as per the AOU's rules and regulations.
Declaration of No Plagiarism by Student (to be signed and submitted by student with TMA work):
I hereby declare that this submitted TMA work is a result of my own efforts and I have not plagiarized
any other person's work. I have provided all references of information that I have used and quoted in
my TMA work.
Name of Student:………………………………..
Question 1: Display technologies:
This question carries 40% of the marks for this assignment.
Displays are the most important part of the output sub-systems in the mobiles. Nowadays,
there are significant researches about the displays in mobiles and theses researches
concentrate on how to reduce the weight, thickness and the power consumption, As well as,
they focus on how to increase the quality of video in these displays. Using the internet and
other resources (e.g., books and AOU e-library), write a short report focusing on the following
What are the main differences (mention at least three) between Liquid-crystal display (LCD) and the•
Thin-Film Transistor (TFT) displays? (9 marks)
Explain in your report some technical specifications (at least three) about Organic Light-Emitting•
Diode (OLED) Displays? (9 marks)
Discuss at least three main advantages of using the OLED displays over TFT displays? (9 marks)•
Discuss the state of the art technology in mobile phones' displays. (8 marks)•
Short Report Writing:
Please adhere to the following guidelines for writing your report:
Your report should be between 500 and 600 words in length. Under-length and over-length
reports will be penalized.
Your report should include at least two figures and/or tables. Do not forget to include a caption
for each figure/table and to use cross-referencing. (1 Mark)
Ensure that your report meets the objectives, has an appropriate structure and style, and that
its technical level is appropriate for the audience, purpose and medium. For more details, you
can refer to the T215 textbooks (Block 1 – Part 7; Block 2 – Part 7 and Block 3). (2 marks)
You must cite all the references i.e. any internet web site, book, journal, article etc. that you
have used as a source of information for your report (2 marks)
You are advised to remind yourself of the issues concerning plagiarism.
Question 2: Multiple Access schemes:
This question carries 20 % of the marks for this assignment.
Different schemes are used for multiple-access among 1G, 2G and 3G of mobile systems. Explain briefly
the operation of these schemes with giving suitable diagrams.
Question 3
This question carries 16% of the marks for this assignment.
Computer networks make use of many security measures that combine together to form an
overall security solution. Explain briefly these measures with giving examples for each.
Question 4
This question carries 24% of the marks for this assignment. Answer all of the following parts.
a. A Read/Write DVD disk drive has a writing speed of 400 Mbits/s. How long would it take
to store a 4 GB raw video file on a blank DVD disk? How small would the 4 GB raw video
file become if it is compressed with a compression ratio of 4? (8 marks)
b. How many bits are stored in the 2 MB file? Using an internet connection that usually
downloads at 5 Mbit/s, how long would it take to download the 2 MB file? (8 marks)
c. Taking the speed of the radio signal as 3×108
m/s, calculate the time taken for a signal
to reach a GPS receiver from a GPS satellite at a position 21 000 km distant from the
receiver. Assume that the speed of the signal is unchanged over the whole path length.
Express your answer in milliseconds. (8 marks)
End of TMA questions

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