Abstract
Dynamic bandwidth allocation and grant scheduling are important factors
when designing passive optical networks. In this paper, we investigate the
problem of optimal scheduling and bandwidth allocation in next generation
10G-EPON coexisting with 1G WDM-PONs. We propose a network architecture for
providing this coexistence and derive an ILP model for offline joint scheduling
and bandwidth assignment for 10G-TDM and 1G-WDM ONUs. To address the scalability
of the ILP model, we introduce a Tabu Search based heuristic for efficiently
obtaining near optimal solutions. We further explore the tradeoff which exists
in terms of delay, scheduling length, and channel utilization, when separate
or the same DBA modules are used for 1G- and 10G-ONUs.
© 2011 IEEE
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