Broadband Multimedia Networks

Answer all of the questions. To receive full marks, answers should consist of a concise description of steps taken, summary of relevant reasoning and a concise explanation of your findings . Where applicable, assumptions used to answer questions must be stated. Single line or purely numerical answers to any question will not receive full marks. Submission Guidelines: Your response to this assignment shall be a two-column research report of no more than 10 pages (including figures, appendices and/or annexes), using the required template's font, font size and column height/width. Submission Process: Note#1 - You will be marked on quality not quantity. Simply meeting the page/word limit does not guarantee any particular grade. Note#2 - You must reference external sources of information to support factual claims you make that are not your own work. Failure to do so will result in a significant loss of marks for any given question. Re-using chunks of text from external sources will be considered plagiarism if not properly credited (e.g. You can use quotation marks and/or italics to make clear what text you are quoting, and provide references to the quote's source in footnotes or at the end of the paper.) Properly credited content from external sources will be considered as supporting material only, and will not contribute to your grade for the assignment. Focus on writing your insights and contributions in your own words. Remember, we know how to use Google too. 1. With the appropriate use of diagrams and clear descriptive text: [20 Marks: 5 + 5 + 5 + 5] • Explain why an MPEG-DASH server will contain copies of a movie encoded at different quality levels and segmented into chunks • Explain how the MPD is used by a MPEG-DASH client to adapt its behaviour when retrieving content for playback, and clearly describe the differences between chunks made up of separate files and chunks represented as byte ranges • Explain the difference between a chunk's representation rate and the rate at which a chunk is retrieved • Explain the role of a playout buffer inside an MPEG-DASH client and when they are prefilled 2. Imagine you have a server containing a movie segmented into chunks and encoded at constant bitrates of 200, 500 and 1000 Kbps. With the appropriate use of diagrams and clear descriptive text: [5 Marks: 2 + 3] • How many bytes make up the chunks representing both 2 seconds and 8 seconds of content at the 200, 500 and 1000 Kbps representation rates? (Six different types of chunks in total.) • How many seconds would each of these chunks take to send if they were encapsulated in UDP/IP frames and transmitted at precisely 1600Kbps (at the IP layer), with no other overheads and no packet losses? 3. Imagine you have a standard web server containing a movie segmented into chunks and encoded at constant bitrates of 200, 500 and 1000 Kbps. Assume an additional 320 bytes of HTTP response overhead is required to encapsulate and send each chunk in response to GET requests from a DASH client. A single DASH client is connected to this server over a path exhibiting 35ms RTT and offering