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Switching technologies in data communication and networking
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Introduction to Communication Networks
Spring 2007 EECS 122 SPRING 2007
Prof. Adam Wolisz^
EECS 122 SPRING 2007 Acknowledgements – slides comming from:^ •^ Data and Computer Communication
by Wiliam Stallings (our supplementary textbook) – numerous slides! • Data Communications and Networking
by B.^ Forouzan , Mc Graw Hill, 2004 • Some figures have been used form the earlier issues of theEECS 122 tought by Prof Jean Walrand. • Introduction to Telephones & Telephone Systems
by A. Michael Noll, Artech House, 1986
Prof. Adam Wolisz^
EECS 122 SPRING 2007
Prof. Adam Wolisz^
EECS 122 SPRING 2007
by the signal propagation
-^ Explicit setup and release of a switch setting is needed, theintention to setup/release a connection must be conveyedfrom the initiator to each switch (signaling)^ –^ Time is needed for both: propagation of the signalinginformation and operation of each switch, as well aspropagation of the confirmation of path setting •^ During the establishing/releasing the path segments can notbe used – but later the resources are assured!!!^ Perfect for LONG transmissions of flows with prettyconstant bit rate!!!
Prof. Adam Wolisz^
EECS 122 SPRING 2007
Prof. Adam Wolisz^
EECS 122 SPRING 2007
Prof. Adam Wolisz^
EECS 122 SPRING 2007
[Fairhurst]
Prof. Adam Wolisz^
EECS 122 SPRING 2007
Prof. Adam Wolisz^
EECS 122 SPRING 2007 Packet switching
[Fairhurst]
Prof. Adam Wolisz^
EECS 122 SPRING 2007 Delay on the way – summary
[ Source: Dr. Cheng Lehigh Univ.]
Prof. Adam Wolisz^
EECS 122 SPRING 2007
[Tannenbaum]
(a) Circuit switching
(b) Message switching
(c) Packet switching
Prof. Adam Wolisz^
EECS 122 SPRING 2007
Prof. Adam Wolisz^
EECS 122 SPRING 2007 Cut-thorugh packet switching
[eecs122, walrand]
Prof. Adam Wolisz^
EECS 122 SPRING 2007 Bottleneck...^
[eecs122, walrand]
It is possible to estimate the bottelneck trhoughput sending „back –to-back“ packets of constant length and observing the time differencebetween their Arrival times...