switching

switching - Switching 1 The Concept of Switching Network...

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1 Switching
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 2 The Concept of Switching Network wide Provide a source-destination channel Fixed delay and bandwidth circuit switching Based-on statistical mux packet switching With a node Setup a input-output match Static, semi-static match (controlled by signaling) circuit switching Dynamic match (controlled by data header) packet switching
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 3 Circuit Switching
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 4 Circuit Switching What is a circuit Dedicated to the terminals Fixed bandwidth and delay Can be physical connections, TDM slots, wavelength channel.
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 5 Circuit Switching Good quality of service (QoS) Relatively low complexity Highly robust Setup/release overhead Low bandwidth efficiency Scalability (large network with huge amount of circuits) Limited flexibility
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 6 Typical Circuit Switching PSTN (Public switched telephone network) 64 kbps voice channels ISDN Designed to integrate multiple services, failed Used for internet access in 1990s
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 7 Circuit Switching Three-step operation Connection setup Data exchange Connection release Main components Transmission Signaling system Switching node
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switching - Switching 1 The Concept of Switching Network...

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