TCP flow aware adaptive path switching in diffserv enabled MPLS networks

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dc.citation.epage199en_US
dc.citation.issueNumber5en_US
dc.citation.spage185en_US
dc.citation.volumeNumber22en_US
dc.contributor.authorAlparslan, O.en_US
dc.contributor.authorAkar, N.en_US
dc.contributor.authorKarasan, E.en_US
dc.date.accessioned2016-02-08T09:51:43Z
dc.date.available2016-02-08T09:51:43Z
dc.date.issued2011-03-04en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractWe propose an adaptive flow-level multi-path routing-based traffic engineering solution for an IP backbone network carrying TCP/IP traffic. Incoming TCP flows are switched between two explicitly routed paths, namely the primary and secondary paths (PP and SP), for resilience and potential goodput improvement at the TCP layer. In the proposed architecture, PPs receive a preferential treatment over SPs using differentiated services mechanisms. The reason for this choice is not for service differentiation but for coping with the detrimental knock-on effect stemming from the use of longer SP that is well known for conventional network load balancing algorithms. Moreover, both paths are congestion-controlled using Explicit Congestion Notification marking at the core and Additive Increase Multiplicative Decrease rate adjustment at the ingress nodes. The delay difference between PP and SP is estimated using two per-egress rate-controlling buffers maintained at the ingress nodes for each path, and this delay difference is used to determine the path over which a new TCP flow will be routed. We perform extensive simulations using ns-2 in order to demonstrate the viability of the proposed distributed adaptive multi-path routing method in terms of per-flow TCP goodput. The proposed solution consistently outperforms the single-path routing policy and provides substantial per-flow goodput gains under poor PP conditions. Moreover, highest goodput improvements under the proposed scheme are achieved by flows that receive the lowest goodputs with single-path routing, while the performance of the flows with high goodputs with single-path routing does not deteriorate with the proposed path switching technique.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T09:51:43Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2011en
dc.identifier.doi10.1002/ett.1468en_US
dc.identifier.issn1124-318X
dc.identifier.urihttp://hdl.handle.net/11693/21831
dc.language.isoEnglishen_US
dc.publisherWileyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1002/ett.1468en_US
dc.source.titleEuropean Transactions on Telecommunicationsen_US
dc.subjectDifferentiated servicesen_US
dc.subjectMPLSen_US
dc.subjectMulti-path routingen_US
dc.subjectPath switchingen_US
dc.subjectTraffic engineeringen_US
dc.titleTCP flow aware adaptive path switching in diffserv enabled MPLS networksen_US
dc.typeArticleen_US

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