Design Project of Network Distribution
Reporting for the Design Project
Part 1 - Executive Summary
This should be a short (2-3 page, including diagrams) summary of your proposed network, including justification for the design you have used. Essentially you need to show that you have thought the design of your link, and that your design is a sensible solution.
You should mention what you have done and why you have done things this way, making sure to cover:
- Modulation format used
- Fibres and ‘dispersion map' used
- Channel spacing used
- Network architecture used - i.e. you have assigned what channels where, used a fixed/reconfigurable add-drop system, etc.
Make a note of what vendors you are sourcing components from and a little on why you chose those components.
You will need to mention the simulation tool used, and provide a short explanation for why the results from your simulation are a good indication that the system as designed should work (i.e. why your results are believable).
Finally, show that your system works. Here you could:
- Provide a range of operating powers (i.e. per channel power into the fibre spans) for which the system works
- Show a plot of BER vs. launch power, showing clearly that you can operate ‘error free'
- Show that each of the different nodes operate error free for all channels You need to convincingly show that the system functions ‘error free'.
Remember, this summary is intended for a potential customer - a purchasing manager at some telecommunication provider (likely to have a B. Eng.). Try to strike a balance between credibility and simplicity in your description.
Part 2 - Project report
This should be a more detailed explanation of your system. This should be no more than 10 pages of total content (attached datasheets, title, contents pages, references, etc., are not included in this total). For this part, you need to:
- Provide the calculations you have done to show that the system should work in the linear transmission regime, as outlined in the design project spec sheet. Make sure to outline what approximations you have made, and why they are justified.
(suggestion: 1-2 pages)
- Provide a schematic of your system, both the VPI block diagram and a simplified schematic representation
(suggestion: 1/2 page)
- Explain the modulation format you have used, and how the transmitter and receiver operate on a basic level
(suggestion: 1-1.5 pages)
- Provide a description of the fibre and dispersion map and justify why you have used these components in the configuration you have chosen
(suggestion: 1/2-1 page)
- Provide the datasheets you have or the components you have used, and point out the parameters that you have matched between the specification sheets and the blocks you have used in VPI
(suggestion: 1-2 pages)
- Show bit error rate curves. Plot BER versus fibre launch power showing both the linear (noise limited regime) and nonlinear propagation regimes.
Note the range of launch powers over which your system can operate (you do not necessarily need to find the high launch power failure point). Note the launch power at which you might consider operating the system.
You need to provide these BER curves for all the receivers in you link (you might want to plot the points from several receivers at one physical location on a single plot to save space ...).
I recommend plotting BER in the range of 1e-2 to 1e-12, with lower BER points being ignored, so adjust you launch power within this range.
(suggestion: 2.5-3 pages)
Make sure to note any approximations you have made and justify why they are sensible.
If you include a figure, make sure that you refer to it in the text and explain what key information the reader should be taking from it.
This section of the report is to help make sure that you have understood what you have been doing in the design project and you will be judged on your understanding of the system you have created.
Calculations (requirements)
- 0SNR: use 58 equation across whole link; this is approximate only, to give an indication of link performance and required power.
Find the required OSNR with VPI, or from datasheets.
- CD: this needs to be for each node (ie. show the residual CD at each node); find the maximum tolerance to CD off a data sheet.
- PMD: you are not simulating PMD in your link, so the calculations are all you have to prove that your system will not fail due to PMD. Find a PMD tolerance of your system off the transponder datasheet and calculate the total PMD of your link using the parameters from the fibre datasheet for the longest route (Melbourne to Sydney). Is route PMD less that tolerance of your system?
Attachment:- Reporting for the Design Project.rar