Q. Calculate Utilization percentage of the link?
- System: Stop and wait ARQ
- Bandwidth: 1Mbps
- Round trip for one bit: 20ms
- Frame length: 1000 bits
Utilization percentage of the link =?
Solution
Bandwidth - delay product = 1 * 106 * 20 * 10 -3 = 20, 000 bits
Thus the sender can send 20000 bits before it receives the ack.
However the system is stop and waits. Therefore only one frame (1000 bits) is sent at a time.
Thus the link utilization = 20000 / 1000 = 5%