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Chien Aun Chan, Manik Attygalle , and Ampalavanapillai Nirmalathas

Local- Traffic -Redirection-Based Dynamic Bandwidth Assignment Scheme for EPON With Active Forwarding Remote Repeater Node. Chien Aun Chan, Manik Attygalle , and Ampalavanapillai Nirmalathas Optical Communications and Networking IEEEOSA Journal of (2011)

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Chien Aun Chan, Manik Attygalle , and Ampalavanapillai Nirmalathas

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  1. Local-Traffic-Redirection-Based DynamicBandwidth Assignment Scheme for EPONWith Active Forwarding Remote Repeater Node ChienAun Chan, ManikAttygalle, and AmpalavanapillaiNirmalathas Optical Communications and Networking IEEEOSA Journal of (2011) Volume: 3, Issue: 3, Publisher: IEEE, Pages: 245–253 • Presenter Chia-ChengChen

  2. Outline • Introduction • EPON with an action RN • LT-DBA Algorithm • Simulation Results • Conclusions

  3. Introduction • Active forwarding RN(remote repeater node) • Increase the downstream performances using a traffic-redirecting technique. • LT-DBA mechanism • Increasing the upstream utilization and reduces the packet delay in the ONU.

  4. EPON with an action RN • Active RN(remote repeater node) • Upstream • Downstream

  5. EPON with an action RN(cont.)

  6. LT-DBA Algorithm • In the first phase • The OLT will run the normal DBA algorithm to allocate timeslots to corresponding ONUs. • In the second phase • The LT-DBA algorithm will make the decision to excess grant a particular ONU’s assigned timeslot based on its previous upstream transmission.

  7. LT-DBA Algorithm(cont.) • Ui,k:ONU I request slot. • Gmax:Max slot can assigned for each ONU.

  8. LT-DBA Algorithm(cont.)

  9. LT-DBA Algorithm(cont.) • OLT will assume that all ONUs are within the same subnet. • Empty timeslot received on a particular time interval that is assigned to ONU x. • Empty upstream timeslot occurred for ONU x and receives frames from ONU x with destination to ONU y.

  10. Simulation Results

  11. Simulation Results(cont.)

  12. Simulation Results(cont.)

  13. Simulation Results(cont.)

  14. Simulation Results(cont.)

  15. Conclusions • LT-DBA mechanism incorporated with repeater-based active RNs, which is improve the upstream transmission performance from ONU to OLT.

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