Part_6_Mutliplexing

Part_6_Mutliplexing - Multiplexing Resource Sharing EE450...

Info icon This preview shows pages 1–18. Sign up to view the full content.

View Full Document Right Arrow Icon
EE450, USC, Zahid 1 Multiplexing: “Resource Sharing” EE450: Introduction to Computer Networks Professor A. Zahid
Image of page 1

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

View Full Document Right Arrow Icon
EE450, USC, Zahid 2 Multiplexing z 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
Image of page 2
EE450, USC, Zahid 3 Categories of Multiplexing Synchronous TDM Statistical TDM
Image of page 3

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

View Full Document Right Arrow Icon
EE450, USC, Zahid 4 Frequency Division Multiplexing z Useful bandwidth of medium exceeds required bandwidth of channel z In FDM, each signal is modulated to a different carrier frequency z Carrier frequencies separated so signals do not overlap (guard bands), example: Broadcast Radio
Image of page 4
EE450, USC, Zahid 5 FDM Process Transmitter Receiver
Image of page 5

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

View Full Document Right Arrow Icon
EE450, USC, Zahid 6 Example: FDM of Voice Signals
Image of page 6
EE450, USC, Zahid 7 Time Division Multiplexing (TDM) Time Slots
Image of page 7

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

View Full Document Right Arrow Icon
EE450, USC, Zahid 8 Synchronous TDM z Data rate of medium exceeds data rate of digital signal to be transmitted z Multiple digital signals interleaved in time z May be at bit level or block of bits z Time slots pre-assigned to sources and fixed z Time slots allocated even if source is idle z Time slots do not have to be evenly distributed amongst sources
Image of page 8
EE450, USC, Zahid 9 Synchronous TDM (Cont.) In synchronous TDM, the data rate of the link is n times faster, and the unit duration is n times shorter.
Image of page 9

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

View Full Document Right Arrow Icon
EE450, USC, Zahid 10 Synchronous TDM (Cont.)
Image of page 10
EE450, USC, Zahid 11 Empty Time Slots Empty TS can’t be used by other Sources Waste of Bandwidth
Image of page 11

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

View Full Document Right Arrow Icon
EE450, USC, Zahid 12 Multilevel Multiplexing
Image of page 12
EE450, USC, Zahid 13 Multiple-Slot Multiplexing
Image of page 13

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

View Full Document Right Arrow Icon
EE450, USC, Zahid 14 Example
Image of page 14
EE450, USC, Zahid 15 Digital Carrier Hierarchy (US) z US system based on DS-1 format z Multiplexes 24 channels z Each frame has 8 bits per channel plus one framing bit 193 bits/frame. Frame Duration is 125 µ seconds
Image of page 15

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

View Full Document Right Arrow Icon
EE450, USC, Zahid 16 T1 illustrated
Image of page 16
EE450, USC, Zahid 17 Digital Hierarchy (US)
Image of page 17

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

View Full Document Right Arrow Icon
Image of page 18
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern