# hw7 - CSCI 415 Data Communication Networks Homework 7 in...

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CSCI 415 Data Communication Networks Homework 7 in progress. .. Saad Mneimneh Visiting Professor Hunter College of CUNY Problem 1: Application of Little’s theorem Two communication nodes 1 and 2 send packets to another node 3. The average lengths for packets generated at 1 and 2 are L 1 and L 2 bytes respectively. The links connecting node 1 and node 2 to node 3 have bandwidths μ 1 and μ 2 bps (bits per second) respectively. Node 3 can processes one packet at a time (no queue) and spends an average of P i seconds on packets from node i . Assume a steady state and a rate of λ 1 and λ 2 packets/sec for nodes 1 and 2, respectively. (a) What is the average number ρ 1 of packets of node 1 that are being processed by node 3 at any given time? (b) What is the average number ρ 2 of packets of node 2 that are being processed by node 3 at any given time? (c) What should be the relation between ρ 1 and ρ 2 ? (d) What is the average delay per packet in node 3?

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## This note was uploaded on 03/27/2010 for the course CSCI 415 taught by Professor Saadmneimneh during the Spring '08 term at CUNY Hunter.

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hw7 - CSCI 415 Data Communication Networks Homework 7 in...

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