1 T215A: Communication and information technologies (I) Spring 2015/2016 ______________________________________________________________________________ Tutor-Marked Assignment _____________________________________________________________________________ C

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T215A: Communication and information technologies (I)
Spring 2015/2016
______________________________________________________________________________
Tutor-Marked Assignment
_____________________________________________________________________________
Cut-off date: 1 May, 2016
_____________________________________________________________________________
Total Marks: 100
TMA Contents
Question 1 (30 marks)……………………………………………………
Question 2 (40 marks)……………………………………………………
Question 3 (30 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:………………………………..
Signature:…………………………………………...
Date:……………………………………………………
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Question 1: Bluetooth
This question carries 30% of the marks for this assignment.
Bluetooth technology is a cutting-edge open specification that enables short-range wireless connections between desktop and notebook computers, handhelds, personal digital assistants (PDAs), mobile phones, camera phones, printers, digital cameras and other devices.
Using the internet and other resources (e.g., books and AOU e-library), write a short report explaining the following factors:
 Discuss the frequency bands of operation for the Bluetooth standard. Discuss the reasons for the selection of these frequency bands taking into consideration factors such as interference (avoiding interference) etc. (6 marks)
 Security is a crucial issue in Bluetooth wireless technology. What are the major security modes for Bluetooth access between two devices? Discuss the recently security issues like: bluesnarfing, blue jacking, blue bugging. (6 marks)
 3G cellular systems also claim to provide wireless data networking facility. Discuss some main differences between the Bluetooth and the 3G cellular systems. (6 marks)
 Discuss the main differences between the Wi-Fi (802. 11g) and the Bluetooth system taking into consideration factors such as Data Rates, Frequency bands and range of operation. (6 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. (2 Marks)
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.
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Question 2: 4G systems
This question carries 40% of the marks for this assignment.
The 4G systems are projected to solve the still-remaining problems of 3G systems. They are designed to provide a wide variety of new services, from high-quality voice to high-definition video to high-data-rate wireless channels. The 4G systems will not only support the next generation mobile services, but also will support the fixed wireless networks. Using the internet and other resources (e.g., books and AOU e-library), write a report explaining the following factors:
 A brief introduction about 4G? (6 marks)
 Explain some basic features of 4G? (6 marks)
 Describe some of the challenges encountered by 4G with their proposed solutions (6 marks)
 Explain briefly some of basic applications of 4G? (6 marks)
 Explain briefly some of the technologies used by 4G like Multicarrier Modulation, Smart Antenna Techniques and Blast system. (6 marks)
Report Writing:
Please adhere to the following guidelines for writing your report:
Your report should be between 800 and 1000 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. (3 Marks)
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). (4 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 (3 marks)
You are advised to remind yourself of the issues concerning plagiarism.
Question 3:
This question carries 30% of the marks for this assignment. Answer all of the following parts:
1. Using a writing speed of 500 Mbits/s, how long would it take to store a 50 GB raw video file on a blue ray disk? How small would the 50 GB raw video file become if it is compressed with a compression ratio of 10. (10 marks)
2. Taking the speed of the radio signal as 3×108 meters per second, calculate the time taken for a signal to reach a GPS receiver from a GPS satellite at a position 21500 km distant from the receiver. Assume that the speed of the signal is unchanged over the whole path length. Express your answer in milliseconds. (10 marks)
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3. If fifteen users are connected to a wireless network that offers a maximum data rate of 400 Mbit/s and a throughput of 30%, what is the typical average practical message data rate available for each user?(show details) (10 marks)
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End of TMA questions