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Authors:
James F. Kurose, Keith W. Ross
Chapter:
The Link Layer: Links,access Networks, And Lans
Exercise:
Problems
Question:13 | ISBN:9780132856201 | Edition: 6

Question

Consider a broadcast channel with N nodes and a transmission rate of R bps. Suppose the broadcast channel uses polling (with an additional polling node) for multiple access. Suppose the amount of time from when a node completes transmission until the subsequent node is permitted to transmit (that is, the polling delay) is d poll . Suppose that within a polling round, a given node is allowed to transmit at most Q bits. What is the maximum throughput of the broadcast channel?

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Answer

Given data:

N=Nodes

R=Transmission rate

dpoll=Polling delay

Q=Transmit polling round

The length of polling round

N\left ( \frac{Q}{R}+d_{poll} \right )

The maximum throughput of the broadcast channel:

So, the maximum throughput of the broadcast channel

 

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