ME503 Telecommunication System Engineering | Assignment 1 Page 1 of 5 ME503 Telecommunication System Engineering Release Date: Week 2 (28th July 2016) Submission Deadline: Week 6 (28th August 2016, 11pm) Word Limit: Altogether 1200 words (for both Parts A & B) Total Marks: 100 (Weight of 10% in unit's final grade) Accepted File Type: Only Microsoft Word Purpose of the assessment: The purpose of this assignment is to motivate students to seek to understand the fundamental systems engineering principles and their applications in telecommunication systems. The assignment has two parts: Part A and Part B. Part A: Contribution to unit's forum at Moodle (60 marks) Every student has to watch all the weekly YouTube videos relating to the topic for the week posted on the unit's forum at Moodle site. The student has to formulate one technically-interesting question from the content of the video and post it to the forum for discussions with other students. It is not allowed to post the same question posted by another student. That would be plagiarism. Also, each week every student has to respond to at least one question posted by another student. Students are expected to answer another student's questions so that co-operatively every student understands the subject matter. A student is expected to post an answer to a question asked if no one was able to answer it correctly. Note: each post, either a question or answer, should never be longer than ½ A4 page using 11-point font size. Engineering Learning Journal: As part of the submission of the Assignment 1, every student shall add the question she/he posted and the ones she/he answered in a weekly basis (on Weeks 1 to 5 videos) with the appropriate date and topic as headings. The learning journal has date and activities performed underneath the date. Below is an example (Note: dates below are only for example.): Week 1 Videos Question posted date: 20th July 2016 Copy from forum's webpage the question you posted and paste here. Answer posted date: 21st July 2016 Paste your answer here (i.e. in your report) Week 2 Videos Question posted date: 27th July 2016 Copy from forum's webpage the question you posted and paste here. Answer posted date: 27st July 2016 Paste your answer here (i.e. in your report) Week 3 Videos Question posted date: 2nd August 2016 Copy from forum's webpage the question you posted and paste here. Answer posted date: 1st August 2016 Paste your answer here (i.e. in your reportDr A. Gyasi-Agyei | ME503 Telecom System Engineering | Assignment 1 Individual Page 2 of 5 Week 4 Videos Question posted date: 9th August 2016 Copy from forum's webpage the question you posted and paste here. Answer posted date: 8th August 2016 Paste your answer here (i.e. in your report) Week 5 Videos Question posted date: 15th August 2016 Copy from forum's webpage the question you posted and paste here. Answer posted date: 15th August 2016 Paste your answer here (i.e. in your report Description of the assessment: 1. Background This assignment seeks to motivate students to apply basic principles in systems engineering. Systems Engineering is an interdisciplinary approach aiming to enable the realisation of successful complex systems. It focuses on: defining & scoping customer needs and required functionality early in the development cycle. 2. Requirements The requirements are found in the marking criteria table below. 3. Submission Guidelines: MIT General Guidelines for Presentation of Academic Work is used in this assignment. Students are expected to know and adhere to it. The assignment must be submitted in soft (electronic) as .doc file on Moodle page provided at MIT intranet. The page numbers of the assignment must be clear on each page. Marking criteria: Marks are allocated as follows: Section to be included in the report Description of the section Marks Part A: Question formulated and posted to forum Weekly question formulated Did the student post any question to the forum in a timely manner, i.e. in the appropriate week? 5 Technical relevance of question formulated Is the question posed technically interesting to the subject matter? Did the student reflect on the question? Is the question not trivial? 5 Critical reflection Does the question posted by the student demonstrate reflection and understanding of the topic or it was hastily formulated? 5 Research depth Does the answer posted by student demonstrate that the 5Dr A. Gyasi-Agyei | ME503 Telecom System Engineering | Assignment 1 Individual Page 3 of 5 student consulted additional references on the topic and used the IEEE referencing style well? English grammar and coherence Does the question posted contain good English, good grammar, admirable writing style, no typos, good format, etc.? Is the question not longer than ½ A4 page with 11- point font? 10 Plagiarism Did the student do any of these without reference and reflection? - Copy from other student(s) - Copy from Internet source/textbook - Copy from other sources -30 Part A: Question answered in the forum Weekly answer posted to the forum Did the student respond to any of the questions posted to the forum each week in a timely manner, i.e. in the appropriate week? 5 Technical relevance of the response to a question Is the answer provided to a question correct and technically interesting to the question? Did the student reflect on the question before answering it? 5 Critical reflection Does the answer to a question posted by the student demonstrate reflection and understanding of the topic or it was hastily formulated? 5 Research depth Does the answer posted by student demonstrate that the student consulted additional references on the topic and used the IEEE referencing style well? 5 English grammar and coherence, and professional report writing Does the answer contain good English, good grammar, admirable writing style, no typos, good format, etc.? Is the answer not longer than ½ A4 page with 11-point font? 10 Plagiarism Did the student do any of these without reference and reflection? - Copy from other student(s) - Copy from Internet source/textbook - Copy from other sources -30 PART B (40 marks): Question 1: Reliability of a Parallel System Consider the system shown in Figure 1, which is a model of an active redundant generators at a main exchange of Telecommunication Company. (a) Assume that the reliability of each subsystem (or component) i has the reliability of Ri. Calculate the reliability of the overall system RS as a function of Ri. Output 1 2 Input Figure 1: Active redundant generator pairDr A. Gyasi-Agyei | ME503 Telecom System Engineering | Assignment 1 Individual Page 4 of 5 (b) If the reliability of component i at time t is Ri(t)=e-it, what is the reliability function of the overall system at time t? (c) Evaluate the mean time to failure (MTTF) of the overall system as a function of i using the reliability function in part (b). (d) Prove using the information above that the failure rate of the overall system with exponential reliability is 1 2 2 1 2 1 2 1 2 ( ) ( )              . Hint. Use the Binomial distribution          1  p  q N  kN0     N k p N kqk (e) What is the mean time before failure (MTBF) of the above system? (5x2.0 marks = 10 marks) Question 2 A point-to-point digital microwave radio system is required by a bank to link the LANs of two of its branches at 2.048 Mbps transmission speed. The handbook delivered by the manufacturer has dimensioned the entire radio terminal with the reliability: MTBF (mean time between failures): 100,000 hours MTTR (mean time to repair): 2 hours (equipment only) The radio path availability was calculated for ���=10-8 and found to be 99.999% for the average worst case. The system configuration is shown in Figure 1. a. Calculate the overall system availability b. Draw the reliability diagram of the system c. How would you increase the availability of the system required by the bank? d. The useful life of the equipment shown in Figure 2 is 15 years. Calculate the reliability of the one radio terminal at the end of it life? (4x2.5 marks = 10 marks) Terminal A Terminal B Figure 2: Microwave systemDr A. Gyasi-Agyei | ME503 Telecom System Engineering | Assignment 1 Individual Page 5 of 5 Question 3 Access to the Internet has arguably become an essential service. However, the quality of the service varies widely in Australia. Multiple governments had promised (and begun to deliver) a high-speed connectivity throughout Australia via the NBN. Discuss and briefly explain the NBN technology. The discussion must be based on research findings, e.g. reference must be made of at least two journals. (10 marks) Question 4 The functions of a telecommunication network, whether it is wired or wireless, are specified by the size of its coverage area and traffic carrying capacity. On the other hand, the performance of the network is specified by its quality of service. a) What limits the size of the coverage area of a telephone exchange in the? b) What limits the traffic carrying capacity of a telephone exchange? (5 + 5 = 10 marks) PART B Marking Rubric Excellent Average Unsatisfactory Part B questions Students demonstrates and excellent understanding of the question, and solution steps are excellently made with reflection on system's design. Student also demonstrates critical thinking skill. Writing style is also great looking. There is no copy-and-pasting in the presented work. Answers are straightforward without unnecessary digressions. Students demonstrates and average understanding of the question, and solution steps are averagely okay. Work has been written not with much care. Student demonstrates no understanding of the question, solution steps are wrong, answers are also wrong. Work has been written poorly. Marks Full marks Average marks 0 Extensions: Requests for an extension, accompanied by supporting documentation, must be received by the student in writing before 3 working days from the due date else penalties may apply for late submission without an approved extension. Special consideration form is available on level 8 reception. Please note that the Lecturer is not allowed to process extension requests. Such must be directed to the head of school. Penalties: Academic misconduct such as cheating and plagiarism may incur penalties ranging from a reduced result to program exclusion.