Question

A source A producing fixed-length cells is required to use a Token Bucket Traffic Shaper (TBTS) of bucket capacity b=20 cell tokens and token feed rate r=40 tokens/sec, followed by a FIFO buffer with output read rate (peak rate) limited to q=120 cells/sec. The output is A’s flow into the network. What is the long-term average cell rate for this flow?

Answer 1

Answer:

Please find the detailed answer as follows:

Explanation:

Long-term average cell rate is also called as sustained cell rate(SCR). It can be defined as the maximum average cell rate in a log time period(T).

The relation among the SCR, Average cell rate and Peak cell rate is as follows:

Avg.cell rate ≤ SCR ≤ PCR

If the source producing fixed-length cells at constant rate, then the long-term average cell rate will be same as peak cell rate(PCR).