Consider a router buffer preceding an outbound link. In this problem, you will use Little’s formula, a famous formula from queuing theory. Let N denote the average number of packets in the buffer plus the packet being transmitted. Let a denote the rate of packets arriving at the link. Let d denote the average total delay (i.e., the queuing delay plus the transmission delay) experienced by a packet. Little’s formula is N=a⋅d . Suppose that on average, the buffer contains 10 packets, and the average packet queuing delay is 10 msec. The link’s transmission rate is 100 packets/sec. Using Little’s formula, what is the average packet arrival rate, assuming there is no packet loss?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Consider a router buffer preceding an outbound link. In this problem, you will use Little’s
formula, a famous formula from queuing theory. Let N denote the average number of packets in
the buffer plus the packet being transmitted. Let a denote the rate of packets arriving at the link.
Let d denote the average total delay (i.e., the queuing delay plus the transmission delay)
experienced by a packet. Little’s formula is N=a⋅d . Suppose that on average, the buffer contains
10 packets, and the average packet queuing delay is 10 msec. The link’s transmission rate is
100 packets/sec. Using Little’s formula, what is the average packet arrival rate, assuming there
is no packet loss?

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