Let’s now consider a second simple example. Suppose there are 10 users and that
one user suddenly generates one thousand 1,000-bit packets, while other users
remain quiescent and do not generate packets. Under TDM circuit switching with 10
slots per frame and each slot consisting of 1,000 bits, the active user can only use its
one time slot per frame to transmit data, while the remaining nine time slots in each
frame remain idle. It will be 10 seconds before all of the active user’s one million bits
of data has been transmitted. In the case of packet switching, the active user can continuously
send its packets at the full link rate of 1 Mbps, since there are no other users
generating packets that need to be multiplexed with the active user’s packets. In this
case, all of the active user’s data will be transmitted within 1 second.
Let’s now consider a second simple example. Suppose there are 10 users and thatone user suddenly generates one thousand 1,000-bit packets, while other usersremain quiescent and do not generate packets. Under TDM circuit switching with 10slots per frame and each slot consisting of 1,000 bits, the active user can only use itsone time slot per frame to transmit data, while the remaining nine time slots in eachframe remain idle. It will be 10 seconds before all of the active user’s one million bitsof data has been transmitted. In the case of packet switching, the active user can continuouslysend its packets at the full link rate of 1 Mbps, since there are no other usersgenerating packets that need to be multiplexed with the active user’s packets. In thiscase, all of the active user’s data will be transmitted within 1 second.
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