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A WDM Passive Optical Network Architecture for Multicasting Services. Student : Tse-Hsien Lin Teacher : Ho-Ting Wu Date : 2005.05.31. Outline. Background Motivations A WDM Passive Optical Network Architecture The Proposed Multicast Algorithm Simulation Future work Conclusions Reference.

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a wdm passive optical network architecture for multicasting services

A WDM Passive Optical Network Architecture for Multicasting Services

Student:Tse-Hsien Lin

Teacher:Ho-Ting WuDate:2005.05.31

outline
Outline
  • Background
  • Motivations
  • A WDM Passive Optical Network Architecture
  • The Proposed Multicast Algorithm
  • Simulation
  • Future work
  • Conclusions
  • Reference
background
Background
  • PON
    • TDM PON
    • WDM PON
passive optical network
Passive Optical Network
  • In a PON, all components between the end users and the central office (CO) are passive, such as optical fibers and couplers
the tdm pon
The TDM PON
  • In a TDM PON, end users share the bandwidth in time domain
  • In the CO, an optical line terminal (OLT) transmits the downstream traffic to the end users and manages the upstream traffic flows from the end users
the wdm pon
The WDM PON
  • What’s is WDM
    • At the same time, The fiber can carry Independent data streams on different wavelengths
  • WDM PONs create point-to-point links between the CO and end user, no sharing wavelength
  • Advantage
    • Scalable
    • High Capacity
motivations
Motivations
  • Network Environments
    • WDM Passive Optical Network
    • Wavelength Spatial Reused
  • Downstream
    • Multicast Transmission
    • Unicast Transmission
  • To Design a Multicast Scheduling Algorithm
    • Simple
    • Efficient
    • Scalable
arrayed waveguide grating
Arrayed Waveguide Grating
  • The AWG is a wavelength-routing device
  • Every second wavelength is routed to the same output port
  • This period of the wavelength response is called free spectral range (FSR)
success dwa pon architecture previous works
SUCCESS-DWA PON Architecture -Previous Works
  • TL = Tunable laser CH X = Thin-film WDM filter
a wdm passive optical network architecture
A WDM Passive Optical Network Architecture
  • OLT use four tunable lasers to transmit control message on control channel or data packet on any wavelength
  • Each ONU consists of a tunable receiver which allow them to receive control message on a control channel (or data on any wavelength)
  • The multicast packet is received by the ONUs attached to the corresponding splitter
  • Each splitter equally distributes all incoming wavelengths to all attached receivers.
tl timing structure
TL Timing Structure
  • Each TL transmits control message which corresponded to the ONUs of the same AWG output port in the control time
  • Each TL transmits data packet to reach all ONUs attached to the same AWG output port in the data time
  • A control packet consists of four fields, destination address, guard time of each destination, wavelength, and offset time
function diagrams of the olt and onu1
Function Diagrams of the OLT and ONU
  • Dispatch packet
    • Sequence
    • Random
    • Short Queue First
  • The Scheduler Multicast Algorithm was satisfied
    • Partition or without Partition
    • Receiver Collision
the proposed multicast algorithm
The Proposed Multicast Algorithm
  • An All-out Packet Is Defined to Be a Queued Packet with All of Its Intended Recipients Free and at the same AWG output port in the Scheduling Time
the scenario of multicast algorithm
The scenario of multicast algorithm
  • The HOL packet of Queue 1 is all-out packet
simulation unicast
Simulation (Unicast)
  • The parameters are N = 64 ONUs
  • The Tunable laser TLs = 4
  • Packet generation follows the Poisson arrival process with parameter λ = 0.04~0.36
  • The time slot = 12us
  • The Simulation during 1000000 slot time
  • TDM  Four-TDM-PON
  • DWA SUCCESS-DWA PON
simulation multicast
Simulation (Multicast)
  • The parameters are N = 64 ONUs
  • The Tunable laser TLs = 4
  • Packet generation follows the Poisson arrival process with parameter λ = 0.02~0.18
  • The time slot = 12us
  • The destination nodes of a multicast packet are randomly selected among all ONU
  • The ONUs in the multicast size S are randomly chosen from the uniform distribution [1,5]
  • The Simulation during 250000 slot time
proposed multicast scheduling algorithms lookback mechanism
Proposed Multicast Scheduling Algorithms – LookBack Mechanism
  • Search for an All-out Packet in the Input Queue up to the Lookback Length L
simulation multicast length
Simulation (Multicast Length)
  • The parameters are N = 64 ONUs
  • The Tunable laser TLs = 4
  • Packet generation follows the Poisson arrival process with parameter λ = 0.02~0.18
  • The time slot = 12us
  • The destination nodes of a multicast packet are randomly selected among all ONU
  • The ONUs in the multicast size S are randomly chosen from the uniform distribution [1,5]
  • The LookBack Length L = 1,2,3,4,5,10,15,20,100,1000,10000,∞
  • The Simulation during 250000 slot time
future work
Future work
  • Performance Key
    • Packet delay
    • Receiver throughput
conclusion
Conclusion
  • Proposed The Multicast Scheduling Mechanism for WDM Passive Optical Network
reference
Reference
  • Ho-Ting Wu, Po-Hsin Hong, and Kai-Wei Ke, “On the Multicast Scheduling Mechanisms for Interconnected WDM Optical Network”, IEEE GLOBECOM 2003
  • Martin Maiser, Michael Scheutzow, and Martin Reisslein, “The Arrayed-Waveguide Grating-Based Single-Hop WDM Network: An Architecture for Efficient Multicasting”, Select Areas in Communications, IEEE Journal , November 2003
  • Yu-Li Hsueh, Matthew S. Rogge, Wei-Tao Shaw, and Leonid G. Kazovsky, “SUCCESS-DWA: A Highly Scalable and Cost-Effective Optical Access Network”, IEEE Optical Communication August 2004
  • Glen Kramer and Gerry Pesavento, “Ethernet Passive Optical Access Network (EPON): Building a Next-Generation Optical Access Network”, IEEE Communications Magazine February 2002