Anyone know the answer to these questions? 1. Assume that the velocity of propagation on a TDM bus is 0.8 c (c=speed of light), its length is 10 m, and the data rate is 500 Mbps. How many bits should be transmitted in a time slot to achieve a bus utilization of 99% ? 2. Consider 2 stations on a baseband bus at a distance of 1 km from each other. Let the data rate be 1 Mbps, the frame length be 100 bits, and the propagation velocity be 2 X 108 m/s. Assume that each station generates frames at an average rate of 1000 frames per second. a) For the ALOHA protocol, if one station begins to transmit a frame at time t, what is the probability of collision? Repeat for slotted ALOHA. b) Repeat for ALOHA and slotted ALOHA at 10 Mbps. Thanks.
Tut tut, using public forums to get answers to your homework questions. Bad form indeed It's honesly so long since I did my Comp Sci degree I can barely remember what ALOHA is. Any budding CCIEs here want to help out ?
I can tell you how to do Q 2 even though I dont know what ALOHA protocal is. Q1 I dont know enough about TDM busses to comment.
ALOHA is/was the precusor [sort of] to ethernet developed at the university of Hawaii for a radio network linking the islands. Both questions are, incidentally, lifted more or less directly from Andy Tanebaums book "Computer Networks" which is a staple of compsci courses worldwide. You'll definately find your answers in there. It's been so long that I can barely rmember the maths involed tho. J
