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Low-Latency Polling Schemes for Long-Reach Passive Optical Networks
- Source :
- IEEE Transactions on Communications. 61:2936-2945
- Publication Year :
- 2013
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2013.
-
Abstract
- The increased propagation delay of future long-reach passive optical networks (LR-PONs) may lead to a significantly increased idle time and delay if optical network units (ONUs) use conventional report-grant mechanisms. Sophisticated and efficient bandwidth allocation mechanisms are required to cope with the imposed propagation delay in LR-PONs. In this study, we evaluate three dynamic bandwidth allocation (DBA) frameworks in terms of frame (packet) delay; namely, we consider conventional (interleaved) polling for traditional PON and two recently introduced scheduling paradigms for next generation LR-PON, i.e., multi-thread polling (MT-P) and real-time polling (RT-P). We enhance MT-P and RT-P by applying the just-in-time framework. Next, we provide an analytical framework for evaluating the end-to-end frame delay in our enhanced MT-P and RT-P frameworks. We compare their performance with conventional polling and double-phase polling and investigate their shortcomings and advantages in an LR-PON setting. The simulation results closely match the analysis for this framework. Also, our results indicate that RT-P significantly reduces frame delay in LR-PONs compared to MT-P and conventional polling frameworks.
- Subjects :
- Dynamic bandwidth allocation
Computer science
business.industry
Network packet
Interleaved polling with adaptive cycle time
Propagation delay
Passive optical network
Scheduling (computing)
Bandwidth allocation
Electrical and Electronic Engineering
Polling
Latency (engineering)
business
Computer network
Subjects
Details
- ISSN :
- 00906778
- Volume :
- 61
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Communications
- Accession number :
- edsair.doi...........a7fe9cb6e9399ccf5757fc3e879a66a9