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This is an individual assignment. Each student must submit a separate his/her own report. The last date of submission of this assignment is 25 October. Drop your assignment in the ELEC3500 assignment box located under the stairs of the EA building. In case of an electronic submission send the e-copy by an email. Any late submission will be penalised by using the following formula.
Mark (received) = Actual mark*(1 – 0.05*D), where D is the delay in submission expressed in 24 hours unit!
All submitted reports and/or assignments must comply with the university’s plagiarism policy. See the course handout about the plagiarism policy on the university website.
This assignment is consists of 11 problems in part A and a small network design problem in part B. You must show full solution of all numerical and design problems.
Total Mark: 130+70 = 200
Part A:
1. Assume that two communication nodes are transmitting data connected by a communication link. The network and system parameters are given below. Assume that receiving node uses the XON and XOFF flow control signalling.
? Link transmission rate 10 Mbs
? Node separation 120 km
? Receive buffer size 1 MB
? Frame size 1000 bytes
? Receiver information processing rate 0.5 MB/sec
a. Assuming that the receiver sends a XOFF signal when the receive buffer is P% full in order to avoid any data or packet loss. Also, assume that the receiver read the receive buffer when the buffer is full. Calculate the value of P that will support a lossless communication while offering full utilisation of the receiver buffer.
b. Calculate the time interval between the XON and XOFF signals. An XON signal will be transmitted by the receiver when the buffer occupancy level goes down to 50% or below.
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