A Hybrid OFDM-TDM Architecture with Decentralized Dynamic Bandwidth Allocation for PONs
One of the major challenges of passive optical networks is to achieve a fair arbitration mechanism that will prevent possible collisions from occurring at the upstream channel when multiple users attempt to access the common fiber at the same time. Therefore, in this study we mainly focus on fair ba...
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| Language: | English |
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Wiley
2013-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2013/561984 |
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| author | Taner Cevik |
| author_facet | Taner Cevik |
| author_sort | Taner Cevik |
| collection | DOAJ |
| description | One of the major challenges of passive optical networks is to achieve a fair arbitration mechanism that will prevent possible collisions from occurring at the upstream channel when multiple users attempt to access the common fiber at the same time. Therefore, in this study we mainly focus on fair bandwidth allocation among users, and present a hybrid Orthogonal Frequency Division Multiplexed/Time Division Multiplexed architecture with a dynamic bandwidth allocation scheme that provides satisfying service qualities to the users depending on their varying bandwidth requirements. Unnecessary delays in centralized schemes occurring during bandwidth assignment stage are eliminated by utilizing a decentralized approach. Instead of sending bandwidth demands to the optical line terminal (OLT) which is the only competent authority, each optical network unit (ONU) runs the same bandwidth demand determination algorithm. ONUs inform each other via signaling channel about the status of their queues. This information is fed to the bandwidth determination algorithm which is run by each ONU in a distributed manner. Furthermore, Light Load Penalty, which is a phenomenon in optical communications, is mitigated by limiting the amount of bandwidth that an ONU can demand. |
| format | Article |
| id | doaj-art-508135c4c9ab4feb97af8dc268c85b49 |
| institution | Kabale University |
| issn | 1537-744X |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-508135c4c9ab4feb97af8dc268c85b492025-02-03T05:48:17ZengWileyThe Scientific World Journal1537-744X2013-01-01201310.1155/2013/561984561984A Hybrid OFDM-TDM Architecture with Decentralized Dynamic Bandwidth Allocation for PONsTaner Cevik0Computer Engineering Department, Fatih University, 34500 Istanbul, TurkeyOne of the major challenges of passive optical networks is to achieve a fair arbitration mechanism that will prevent possible collisions from occurring at the upstream channel when multiple users attempt to access the common fiber at the same time. Therefore, in this study we mainly focus on fair bandwidth allocation among users, and present a hybrid Orthogonal Frequency Division Multiplexed/Time Division Multiplexed architecture with a dynamic bandwidth allocation scheme that provides satisfying service qualities to the users depending on their varying bandwidth requirements. Unnecessary delays in centralized schemes occurring during bandwidth assignment stage are eliminated by utilizing a decentralized approach. Instead of sending bandwidth demands to the optical line terminal (OLT) which is the only competent authority, each optical network unit (ONU) runs the same bandwidth demand determination algorithm. ONUs inform each other via signaling channel about the status of their queues. This information is fed to the bandwidth determination algorithm which is run by each ONU in a distributed manner. Furthermore, Light Load Penalty, which is a phenomenon in optical communications, is mitigated by limiting the amount of bandwidth that an ONU can demand.http://dx.doi.org/10.1155/2013/561984 |
| spellingShingle | Taner Cevik A Hybrid OFDM-TDM Architecture with Decentralized Dynamic Bandwidth Allocation for PONs The Scientific World Journal |
| title | A Hybrid OFDM-TDM Architecture with Decentralized Dynamic Bandwidth Allocation for PONs |
| title_full | A Hybrid OFDM-TDM Architecture with Decentralized Dynamic Bandwidth Allocation for PONs |
| title_fullStr | A Hybrid OFDM-TDM Architecture with Decentralized Dynamic Bandwidth Allocation for PONs |
| title_full_unstemmed | A Hybrid OFDM-TDM Architecture with Decentralized Dynamic Bandwidth Allocation for PONs |
| title_short | A Hybrid OFDM-TDM Architecture with Decentralized Dynamic Bandwidth Allocation for PONs |
| title_sort | hybrid ofdm tdm architecture with decentralized dynamic bandwidth allocation for pons |
| url | http://dx.doi.org/10.1155/2013/561984 |
| work_keys_str_mv | AT tanercevik ahybridofdmtdmarchitecturewithdecentralizeddynamicbandwidthallocationforpons AT tanercevik hybridofdmtdmarchitecturewithdecentralizeddynamicbandwidthallocationforpons |