- Example: During a typical remote login connection over a 19.2kb/s modem a user types at a rate of 1
symbol/sec or 8 bits/sec and then transferes a transfers a 100 kbyte file. Assume the total holding time of
the connection is 10 min.
What is the burstyness of this data session?
The time to transfer the file is about 41 sec. so for 600 - 41sec = 559 sec the data rate is 8 bits/sec or 4,
472 bits were transfered.
Thus in 600 sec. 4,472 + 100X8X103 bits were transfered, yeilding a average rate of:
804,472 bits/600 sec = 1,340 bits/sec.
The peak rate was 19.2 Kb/s so the burstyness for this data session was:
19,200/1,340 = 14.3
- Data traffic is characterized by a message ( or packet ) length in bit (or bytes) and an arrival rate.
- The traffic intensity is then:
- The standard assumption is that the packet length and interarrival times have exponential pdf's.