Answered: Assume a 64 Kbps voice source which is…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Question

Assume a 64 Kbps voice source which is modeled as an on-off source with an average duration of the active period of Ta = 0.4 s and average duration of the silent period is Ts = 0.6 s.

(a) Estimate the source parameters and the average data rate.

(b) Assume that there are 5 voice sources sharing a link. What is the probability that more than 3 voice sources are in the active state simultaneously. (Hint: Binomial distribution)

(c) The link capacity is denoted by C Kbps. When there are more than n = b C 64 c sources in the active state simultaneously, we call it an outage event. Given that the link capacity is 640 Kbps and 12 voice sources share the link, what is the probability of outage?

(Hint: Prob{outage} 1 = Prob{n + 1 sources in active state} + Prob{n + 2 sources in active state} + ... )

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