Homework6 - GEORGIA TECH LORRAINE GEORGIA INSTITUTE OF...

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Unformatted text preview: GEORGIA TECH LORRAINE GEORGIA INSTITUTE OF TECHNOLOGY School of Electrical and Computer Engineering ECE 6543 Fiber Optic Network Spring Semester 2009 Homework #6 Date due: April 7th Problem 1 Problem 11.2 p.612 Optical Networks Problem 2 Consider the IPACT protocol with the limited service scheme, and a maximum scheduling timeslot W MAX of 2500 bytes. Draw a timing diagram for a 4-ONU EPON system. Assume the following sequence of requests as shown below. Assume RTTs are constant but different for different ONUs and assume a 5 μs guard timeslot between data transmission of different ONUs. The polling order starts with ONU 1. ONU Nr Request 1 Request 2 Request 3 RTT 1 1800 1000 3000 100 2 1500 1200 4500 200 3 3000 3000 1000 250 4 2700 2500 2500 400 Problem 3 Consider the near-far problem in an EPON with four different ONUs. The distances of different ONUs from the OLT are: • 1 km for ONU1 • 5 km for ONU2 • 10 km for ONU3 • 20 km for ONU4 Assume that each ONU’s transmission power is 0.01 mW. Also assume thatAssume that each ONU’s transmission power is 0....
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This note was uploaded on 09/01/2010 for the course ECE 6543 taught by Professor Boussert during the Spring '09 term at Georgia Tech.

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Homework6 - GEORGIA TECH LORRAINE GEORGIA INSTITUTE OF...

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