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I have N packets of size L Mbits and I want to send them from A to B, in between there are two routers and each link has different transmission rate(e.g A to router1 link is 3Mbps, router1 to router2 5Mbps and router2 to B 8Mbps), so How to calculate transmission delay?

user2803495
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1 Answers1

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R -> rate of transfer of each link in Mbps

For every link Li: transmission delay of 1st packet=L0/R+L1/R....+Ln/R

in a loop consider,

For every N packet the transmission delay will be (N-1)Li/R+Li/R and calculate the remaining part

here for you example trans_delay of 1st packet= (M/3+M/5+M/8) and the rest u can apply the formula above

Newbie
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  • for 2nd packet trans_delay won't be same as packets are transferred in store-and-forward manner when your first packet leaves router1 towards router2 the second packet starts its journey from A to router1 in the same time span. for first packet your formula is right, but what about others? – user2803495 Nov 22 '13 at 21:55