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Local-Traffic-Redirection-Based Dynamic Bandwidth Assignment Scheme for EPON With Active Forwarding Remote Repeater Node Chien Aun Chan, Manik Attygalle,

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Presentation on theme: "Local-Traffic-Redirection-Based Dynamic Bandwidth Assignment Scheme for EPON With Active Forwarding Remote Repeater Node Chien Aun Chan, Manik Attygalle,"— Presentation transcript:

1 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) Volume: 3, Issue: 3, Publisher: IEEE, Pages: 245–253 Presenter Chia-Cheng Chen

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 In the second 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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