dc.contributor.advisor | Akar, Nail | |
dc.contributor.author | Boyraz, Hakan | |
dc.date.accessioned | 2016-07-01T11:02:39Z | |
dc.date.available | 2016-07-01T11:02:39Z | |
dc.date.issued | 2005 | |
dc.identifier.uri | http://hdl.handle.net/11693/29644 | |
dc.description | Cataloged from PDF version of article. | en_US |
dc.description.abstract | Optical Burst Switching (OBS) is being considered as a candidate architecture
for the next generation optical Internet. The central idea behind OBS is the assembly
of client packets into longer bursts at the edge of an OBS domain and the
promise of optical technologies to enable switch reconfiguration at the burst level
therefore providing a near-term optical networking solution with finer switching
granularity in the optical domain. In conventional OBS, bursts are injected to
the network immediately after their assembly irrespective of the loading on the
links, which in turn leads to uncontrolled burst losses and deteriorating performance
for end users. Another key concern related to OBS is the difficulty of
supporting QoS (Quality of Service) in the optical domain whereas support of
differentiated services via per-class queueing is very common in current electronically
switched networks. In this thesis, we propose a new control plane protocol,
called Differentiated ABR (D-ABR), for flow control (i.e., burst shaping) and
service differentiation in optical burst switching networks. Using D-ABR, we
show with the aid of simulations that the optical network can be designed to
work at any desired burst blocking probability by the flow control service of the proposed architecture. The proposed architecture requires certain modifications
to the existing control plane mechanisms as well as incorporation of advanced
scheduling mechanisms at the ingress nodes; however we do not make any specific
assumptions on the data plane of the optical nodes. With this protocol, it is
possible to almost perfectly isolate high priority and low priority traffic throughout
the optical network as in the strict priority-based service differentiation in
electronically switched networks. Moreover, the proposed architecture moves the
congestion away from the OBS domain to the edges of the network where it is
possible to employ advanced queueing and buffer management mechanisms. We
also conjecture that such a controlled OBS architecture may reduce the number
of costly Wavelength Converters (WC) and Fiber Delay Lines (FDL) that are
used for contention resolution inside an OBS domain. | en_US |
dc.description.statementofresponsibility | Boyraz, Hakan | en_US |
dc.format.extent | 74 leaves, illustrations, graphics | en_US |
dc.language.iso | English | en_US |
dc.rights | info:eu-repo/semantics/openAccess | en_US |
dc.subject | Optical burst switching | en_US |
dc.subject | congestion control | en_US |
dc.subject | service differentiation | en_US |
dc.subject | rate control | en_US |
dc.subject.lcc | TK5105.3 .B69 2005 | en_US |
dc.subject.lcsh | Packet switching. | en_US |
dc.title | Flow control and service differentiation in optical burst switching networks | en_US |
dc.type | Thesis | en_US |
dc.department | Department of Electrical and Electronics Engineering | en_US |
dc.publisher | Bilkent University | en_US |
dc.description.degree | M.S. | en_US |
dc.identifier.itemid | BILKUTUPB088859 | |