Transmission delay

[poornima lagadapati]

Assuming that packets are transmitted in a first-come-first-served manner, as is com￾mon in packet-switched networks, our packet can be transmitted only after all the

packets that have arrived before it have been transmitted. Denote the length of the

packet by L bits, and denote the transmission rate of the link from router A to router

B by R bits/sec. For example, for a 10 Mbps Ethernet link, the rate is R = 10 Mbps;

for a 100 Mbps Ethernet link, the rate is R = 100 Mbps. The transmission delay is

L/R. This is the amount of time required to push (that is, transmit) all of the packet’s

bits into the link. Transmission delays are typically on the order of microseconds to

milliseconds in practice.

 

[Himanshi Agarwal]

In packet switched networks, there are four types of commonly identified delays – processing, queuing, transmission and propagation delays.