Transmission time

Last lecture left us with a confusing view of what transmission time really means. A bit of searching around did not help me a lot. The problem is that different people interpret the term in different ways:

1. Same as transmission delay = L /  R (the one I meant)
2. The amount of time it takes a bit to go from the start of the link to its destination node (first bit transmission time + propagation delay)
3. Transmission time is the time it takes a message to reach its destination from is source. It is the time between the first bit leaving the sender and the last bit arriving the receiver. The first bit leaves earlier and arrives earlier; the last bit leaves later and arrives later (packet transmission time + propagation delay).

Just to avoid trouble the best thing to do use to use the term transmission delay instead. Simple, isn't it?


Update: After discussing the problem with a friend of mine, he decided to make a move and fixed the wikipedia entry. Now it is also shown as meaning "1".