Differentiated reliability in optical networks: theoretical and practical results
This paper presents both theoretical and experimental studies carried on wavelength-division multiplexing (WDM) networks with arbitrary (mesh) topology that provide optical circuits with differentiated reliability (DiR). Reliability is obtained by means of a modified shared path protection (SPP) swi...
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| Veröffentlicht in: | Journal of lightwave technology 2003-11, Vol.21 (11), p.2576-2586 |
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| container_title | Journal of lightwave technology |
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| creator | Tacca, M. Fumagalli, A. Paradisi, A. Unghvary, F. Gadhiraju, K. Lakshmanan, S. Rossi, S.M. de Campos Sachs, A. Shah, D.S. |
| description | This paper presents both theoretical and experimental studies carried on wavelength-division multiplexing (WDM) networks with arbitrary (mesh) topology that provide optical circuits with differentiated reliability (DiR). Reliability is obtained by means of a modified shared path protection (SPP) switching scheme-here referred to as SPP-DiR. As explained in the paper, SPP-DiR networks provide multiple degrees of circuit reliability that satisfy client-specific reliability requirements in a cost-effective way. The theoretical study first defines the problem of optimally designing SPP-DiR WDM networks. It then presents a time-efficient suboptimal algorithm that determines the routing and the reliability degree of each demand in the given traffic matrix by applying both the conventional SPP and the SPP-DiR scheme. When compared to dedicated path protection switching, results obtained for the pan-European network using the proposed algorithm indicate cost reductions of about 16% when SPP is applied, and up to 34% when SPP-DiR is applied. The experimental study describes the /spl Omega/ testbed-a WDM optical circuit-switched mesh network with an IP control plane-which is believed to be the first testbed ever built that makes use of the SPP-DiR scheme. Experimental results performed on the /spl Omega/ testbed report restoration times of the optical circuits-disrupted by a fiber fault-that are few tens of milliseconds. |
| doi_str_mv | 10.1109/JLT.2003.819554 |
| format | Article |
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Reliability is obtained by means of a modified shared path protection (SPP) switching scheme-here referred to as SPP-DiR. As explained in the paper, SPP-DiR networks provide multiple degrees of circuit reliability that satisfy client-specific reliability requirements in a cost-effective way. The theoretical study first defines the problem of optimally designing SPP-DiR WDM networks. It then presents a time-efficient suboptimal algorithm that determines the routing and the reliability degree of each demand in the given traffic matrix by applying both the conventional SPP and the SPP-DiR scheme. When compared to dedicated path protection switching, results obtained for the pan-European network using the proposed algorithm indicate cost reductions of about 16% when SPP is applied, and up to 34% when SPP-DiR is applied. The experimental study describes the /spl Omega/ testbed-a WDM optical circuit-switched mesh network with an IP control plane-which is believed to be the first testbed ever built that makes use of the SPP-DiR scheme. Experimental results performed on the /spl Omega/ testbed report restoration times of the optical circuits-disrupted by a fiber fault-that are few tens of milliseconds.</description><identifier>ISSN: 0733-8724</identifier><identifier>EISSN: 1558-2213</identifier><identifier>DOI: 10.1109/JLT.2003.819554</identifier><identifier>CODEN: JLTEDG</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Algorithms ; Circuit testing ; Circuit topology ; Circuits ; Computer networks ; Network topology ; Networks ; Optical fiber networks ; Optical fiber testing ; Protection ; Reliability theory ; Restoration ; Routing ; Studies ; Switching ; Switching theory ; Wavelength division multiplexing ; WDM networks</subject><ispartof>Journal of lightwave technology, 2003-11, Vol.21 (11), p.2576-2586</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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Reliability is obtained by means of a modified shared path protection (SPP) switching scheme-here referred to as SPP-DiR. As explained in the paper, SPP-DiR networks provide multiple degrees of circuit reliability that satisfy client-specific reliability requirements in a cost-effective way. The theoretical study first defines the problem of optimally designing SPP-DiR WDM networks. It then presents a time-efficient suboptimal algorithm that determines the routing and the reliability degree of each demand in the given traffic matrix by applying both the conventional SPP and the SPP-DiR scheme. When compared to dedicated path protection switching, results obtained for the pan-European network using the proposed algorithm indicate cost reductions of about 16% when SPP is applied, and up to 34% when SPP-DiR is applied. The experimental study describes the /spl Omega/ testbed-a WDM optical circuit-switched mesh network with an IP control plane-which is believed to be the first testbed ever built that makes use of the SPP-DiR scheme. Experimental results performed on the /spl Omega/ testbed report restoration times of the optical circuits-disrupted by a fiber fault-that are few tens of milliseconds.</description><subject>Algorithms</subject><subject>Circuit testing</subject><subject>Circuit topology</subject><subject>Circuits</subject><subject>Computer networks</subject><subject>Network topology</subject><subject>Networks</subject><subject>Optical fiber networks</subject><subject>Optical fiber testing</subject><subject>Protection</subject><subject>Reliability theory</subject><subject>Restoration</subject><subject>Routing</subject><subject>Studies</subject><subject>Switching</subject><subject>Switching theory</subject><subject>Wavelength division multiplexing</subject><subject>WDM networks</subject><issn>0733-8724</issn><issn>1558-2213</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNp9kU1rFEEQhpug4Bpz9pDL4EFzmU1V9cd0ewv5UlmQQDwP3bM12HEys3b3Ivn3zjKCkENORRXPW1TxCPEeYY0I7vzb5n5NAHJt0WmtjsQKtbY1EcpXYgWNlLVtSL0Rb3N-AEClbLMSd1ex7znxWKIvvK0SD9GHOMTyVMWxmnYldn6oRi5_pvQrf67KT54SL1M_bqtd8t3SJc77oeR34nXvh8wn_-qx-HFzfX_5pd58v_16ebGpO2mp1AqVt51TRrI1wSAhB9pKRSAl-Q57TQEooGlC48FQsME6tOQ8bL0LII_Fp2XvLk2_95xL-xhzx8PgR572uXWAxmlDzUx-fJEkS2Q02Bk8exFEIHIgSbsZ_fAMfZj2aZwfbq1VZNC6w4nnC9SlKefEfbtL8dGnp3lTe5DWztLag7R2kTYnTpdEZOb_NGkEq-VfQuGRVQ</recordid><startdate>20031101</startdate><enddate>20031101</enddate><creator>Tacca, M.</creator><creator>Fumagalli, A.</creator><creator>Paradisi, A.</creator><creator>Unghvary, F.</creator><creator>Gadhiraju, K.</creator><creator>Lakshmanan, S.</creator><creator>Rossi, S.M.</creator><creator>de Campos Sachs, A.</creator><creator>Shah, D.S.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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Reliability is obtained by means of a modified shared path protection (SPP) switching scheme-here referred to as SPP-DiR. As explained in the paper, SPP-DiR networks provide multiple degrees of circuit reliability that satisfy client-specific reliability requirements in a cost-effective way. The theoretical study first defines the problem of optimally designing SPP-DiR WDM networks. It then presents a time-efficient suboptimal algorithm that determines the routing and the reliability degree of each demand in the given traffic matrix by applying both the conventional SPP and the SPP-DiR scheme. When compared to dedicated path protection switching, results obtained for the pan-European network using the proposed algorithm indicate cost reductions of about 16% when SPP is applied, and up to 34% when SPP-DiR is applied. The experimental study describes the /spl Omega/ testbed-a WDM optical circuit-switched mesh network with an IP control plane-which is believed to be the first testbed ever built that makes use of the SPP-DiR scheme. Experimental results performed on the /spl Omega/ testbed report restoration times of the optical circuits-disrupted by a fiber fault-that are few tens of milliseconds.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/JLT.2003.819554</doi><tpages>11</tpages></addata></record> |
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| subjects | Algorithms Circuit testing Circuit topology Circuits Computer networks Network topology Networks Optical fiber networks Optical fiber testing Protection Reliability theory Restoration Routing Studies Switching Switching theory Wavelength division multiplexing WDM networks |
| title | Differentiated reliability in optical networks: theoretical and practical results |
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