multiplexing

multiplexing - Multiplexing(Resource Sharing Professor A...

Info iconThis preview shows pages 1–19. Sign up to view the full content.

View Full Document Right Arrow Icon
A. Zahid, EE450 1 Multiplexing (Resource Sharing) Professor A. Zahid EE450: Computer Networks
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
A. Zahid, EE450 2 Multiplexing Channel-side Aggregate-side Aggregate link Point-to-Point WAN Link n Channels n Channels
Background image of page 2
A. Zahid, EE450 3 Multiplexing • Multiplexing is a resource sharing process allowing information from several information sources to be aggregated onto a single, high- speed link Channel-side Aggregate-side Aggregate link Point-to-Point WAN Link n Channels n Channels
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
A. Zahid, EE450 4 Classifications of Multiplexing
Background image of page 4
A. Zahid, EE450 5 Frequency Division Multiplexing •F D M • Useful bandwidth of medium exceeds required bandwidth of channel • Each signal is modulated to a different carrier frequency • Carrier frequencies separated so signals do not overlap (guard bands) • e.g. broadcast radio • Channel allocated even if no data
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
A. Zahid, EE450 6 FDM: Multiplexing
Background image of page 6
A. Zahid, EE450 7 FDM: De-Multiplexing
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
A. Zahid, EE450 8 Time Division Multiplexing
Background image of page 8
A. Zahid, EE450 9 Synchronous TDM • Data rate of medium exceeds data rate of digital signal to be transmitted • Multiple digital signals interleaved in time • May be at bit level or block of bits • Time slots pre-assigned to sources and fixed • Time slots allocated even if source has no data • Time slots do not have to be evenly distributed amongst sources
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
A. Zahid, EE450 10 Synchronous TDM
Background image of page 10
A. Zahid, EE450 11 Example of Synchronous TDM
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
A. Zahid, EE450 12 Synchronous De-Multiplexing
Background image of page 12
A. Zahid, EE450 13 Example of TDM Analog and Digital Sources
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
A. Zahid, EE450 14 Digital Carrier System • Hierarchy of TDM • USA/Canada/Japan use one system • Europe/South America use a similar (but different) system • US system based on DS-1 format • Multiplexes 24 channels • Each frame has 8 bits per channel plus one framing bit 193 bits/frame • Frame Duration is 125 μ seconds
Background image of page 14
A. Zahid, EE450 15 T1 Multiplexing
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
A. Zahid, EE450 16 T1 Illustration
Background image of page 16
A. Zahid, EE450 17 Digital Hierarchy
Background image of page 17

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
A. Zahid, EE450 18 Router Interface to T-1 Circuit Router Router ISP Point of Presence (POP) T-1 Line
Background image of page 18
Image of page 19
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 36

multiplexing - Multiplexing(Resource Sharing Professor A...

This preview shows document pages 1 - 19. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online