This assignment consists of Part 1 and Part 2. PART 1: Wired Network Performance PART 2: Hybrid Network (combined wired and wireless) Performance

This assignment consists of Part 1 and Part 2. PART 1: Wired Network Performance

Consider a wired network model (OMNET++) using a Gigabit Ethernet (GbE) backbone switch linked to several Ethernet sub-switches (also called subnet) so that large number of wired nodes/clients can be accommodated to the network. For example, one subnet can support up to 20 nodes (for optimum performance). So, if you are simulating a network with 100 nodes in total, your network model should have 5 subnets linked to a GbE backbone.

Simulation parameters:

  • Number of nodes/clients: 100
  • Simulation time: 3600 Sec (longer required for Video streaming)
  • Traffic type: Video streaming • Packet type: UDP packet
  • Performance metrics: 
    • Video Throughput; 
    • Video End-to-end delays; (c) Video packet losses.

[Hint: Video streaming uses UDP transport layer protocol, and hence UDPVideoStreamCli,

UDPVideoStreamSvr can be used for video client and video Server, respectively.] 

Investigation: Effect of increasing the number of video clients on system performance You may use the following table to record your simulation results.

NodesThroughput (bps)End-to-end Delay (sec)# of Packet loss
10   
20   
30   
40   
50   
60   
70   
80   
90   
100   
  1. Analyse the results (including model validation) and write your report (4-6 pages) by summarising your research findings. Hint: You can draw several graphs including number of clients versus video throughput, end-to-end delays, and packet losses.  

PART 2: Hybrid Network (combined wired and wireless) Performance

Objective: In completing Part 2 of the assignment, you will explore the effect of increasing wireless/mobile video clients on the performance of a hybrid network.

SUGGESTED STEPS:

  1. Extend the wired network that you have developed in Part 1 to include wireless (or mobile) clients. Establish a connection between wireless access points and subnets.
  2. Configure and run the model.
  3. Measure the following performance metrics (same as Part 1).

Video Throughput; End-to-end delays; and packet losses.

  • Validate your simulation results: Ensure that your simulation results are valid (i.e. correct). You can use various methods/techniques to validate your results (read some literature on simulation model validation techniques).
  • Comparative Study: Compare network performance with and without mobile wireless clients. Using tables and/or graphs (MS Excel or Matlab), summarise your simulation results to make a meaningful conclusion. This is your opportunity to explore things to demonstrate your in-depth knowledge and understanding of the assignment that you have done. 

Hints: Example of analysis and synthesis of research findings: You may use the following table to record your simulation results. Also draw various graphs if appropriate.

Nodes/clientsThroughput (bps)End-to-end Delay (s)# of Packet loss
wiredwirelesswiredhybridwiredhybridwiredhybrid
55   
1010   
1515   
2020   
2525   
3030   
3535   
4040   
4545   
5050   

General Report Format

Introduction: What, why and how? – Begin your report with a clear objective (What!) of your assignment. Explain why this assignment/research is needed and how you have completed it. Outline the structure of the rest of the report. 

Modelling the network: Describe the model that you have developed using appropriate screenshots for models and subnet (hint: avoid unnecessary screenshots).

Results and Analysis: Summarise your simulation results using tables and/or graphs (Excel or Matlab graphs) and provide a comparative analysis. 

Model Validation: Discuss how you have validated your simulation results.

Lesson learned: Write a paragraph or two, reflecting on your own learning. 

Conclusion: Summarise the main findings and future research directions.

References: List at least 5 references that you have used in the report. 

Report Length: (Part 1: 4-6 pages; Part 2: 10-14 pages) 

Spacing: 1.5

Font: 11 Times New Roman.

Optional Materials

Appendices A to F

Appendix A

Appendix B

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