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In a token bucket network transmission spreed  is $20^*(10^6)$ bps and maximum rate can only be sent for at most $10$ sec at a time, and at most $150$ Mb can be sent over any $15$ sec window, then the value for token input rate  is _________ mbps
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Consider  a token bucket with maximum rate R = 20*(10^6) bps

 suppose we want to make sure that the maximum rate can only be sent for at-most 10 seconds at a time , and at- most ( maximum ) 150 Mb can be sent over any 15 second window.

Then the required value for which the new tokens are added at the rate of r Mbps which  we have to calculate in this question .

Capacity of the token bucket (b) = 150 Mbps
Maximum possible transmission rate (M) = 20*(106) bps
So the maximum burst time = b/(M-r) = 10 

Duration = b/M-r, where b is the initial capacity, M is outgoing rate and r is incoming rate

now put b= 150  Mbps, M = 20 Mbps ,  we  need to find r 

b= (M-r) 10 

b = 10M - 10r

10r = (200 - 150 ) 

r = 50 /10
r = 5

The value for token input rate  is 5 Mbps

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@Arjun sir

Is token bucket in syllabus? I don't think so??
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