ENGD3104代做、代写MATLAB程序语言

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ENGD3104 Communication Networks 2

Coursework Assignment
2024-2025

(Maximum Marks: 60)

Issue date: 29/01/2025
Submission deadline: 04/04/2025 at 12:00 pm (noon)
Feedback date: 16/05/2024

What to submit: Your coursework must be submitted as a report in Word format to Turnitin. Your MATLAB codes must be provided as text (not pictures) and included as appendices at the end of the report. All code lines must be commented to explain them. All sources used in the report must be cited as appropriate. All references must be in IEEE style. Your report, including figures and codes must not exceed 12 pages. The minimum font size is 11 pt. Please note that 5 marks will be allocated to the presentation and organisation of your report.

Part I) UDP checksum

Write a MATLAB function that computes the IPv4 UDP checksum. The input arguments must be in the format given in Example 3 of Lecture 3. The checksum must be returned as a 16-bit binary number. Give an example to illustrate how your function works.
(20 marks: correctness of the code: 8 marks, explanation: 5 marks, quality: 5 marks, example: 2 marks)

Part II) Throughput estimation

Speedtest by Ooklaand and RTR-Nettest by Austrian Regulatory Authority for Broadcasting and Telecommunications are two network measurement tools.

a)Design an experiment that uses each tool to estimate your home broadband download speed, upload speed, and round-trip time.
(8 marks)
b) Analyse and compare the results.
(10 marks)

Part III) Image transmission over a lossy network

a)Write a MATLAB function that simulates the transmission of a color image over a network where the packet size is at most 512 bytes and the packets are lost according to the Bernoulli loss model. Give an example that illustrates how your function works.
(6 marks)
b)Use your function to simulate the transmission of the MATLAB built-in image peppers.png when the packet loss rate is 0.05. Discuss the results.
(5 marks)
c)Use JPEG to compress the image peppers.png with quality factors 90 and 20. Simulate the transmission of the compressed images for the same packet loss rate as in part b). Discuss the results and compare them to those of part b).
(6 marks)