CS6710: Wireless Networks

Due: Friday October 19

In this assignment, you will get introduced to Qualnet, a basic simulator for wireless networks that is popular within the academic research community.  

1. Setup and reading: Setup GlomoSim simulator in your own UNIX account or in your own Windows system.   You can download Glomosim from either the official site or from here (within NU) or here (using CCIS UNIX username and password).  Check here for detailed instructions for installation.

2. A two-node wireless network scenario: Set up the following scenario.
   

   Node number:            2
   Terrain:                    1000*1000
   Traffic pattern:        CBR
   Packet Length:          512B
   Data Rate:                1Mbps
   Simulation time:      10s
   Static Routing
   
   
3. Transmission range: Find out the corresponding transmission ranges of 8 settings obtained by varying the following 3 dimentions:
   
   Tx Power:               1dBm, 10dBm,
   Tx Receive Threshold:   -81.0dBm, -91dBm
   PROPAGATION-PATHLOSS:    FREE-SPACE,  TWO-RAY
   
   Compare your results with the equations in section 2.3 of  glomoman.pdf.
    
4. Performance analysis of different signal coding schemes: Set the following parameters in your config file.
   
   Tx Power: 1dBm
   RADIO-RX-SENSITIVITY -100.9
   RADIO-RX-THRESHOLD   -100.9
   
   Using BER as the receiving criteria, compare the packet loss ratios under three different coding schemes: BPSK, DPSK, DBPSK.  Hint: In
   the config.in the following parameters sets BPSK as the coding scheme.
   
   RADIO-RX-TYPE           BER-BASED
   BER-TABLE-FILE          ./ber_bpsk.in
   
   Plot the packet loss rate as a function of traffic distance, varying the distance in step of 10 meters from 250m to 370m.
   
   Change the packet length to 32B, repeating the above simulations.

What you need to submit

Please submit the following data to our TA Tao Jin by Friday, October 19.

• For Exercise 3:
• A brief description of your simulation procedure
• Script file of command line output
• A table, giving the transmission ranges for each of the 8 settings
• A plot of TX power vs transmission range, for a fixed receive threshold of -81.0dBm, for each of the two propagation-loss models.
• A brief analysis or comparison of different propagation models
• For Exercise 4:
• Script file of your command line output
• Brief description of simulation scenario
• Plots of pkt loss rate vs. dist