Abstract

Telecom customers may have specific time periods during which they require extra resilience. However, these time-differentiated resilience requirements are not effectively addressed by current service level agreement (SLA) frameworks. To satisfy these high priority periods, a generic SLA framework typically provides upgraded protection over the entire service duration, which is unnecessary and expensive. In this study, we propose a novel SLA framework that allows customers to specify critical windows (CWs) to address their time-differentiated demands for resilience. CWs correspond to the resilience-sensitive periods, and connections are backed up during CWs using pre-cross-connected protection. To achieve high resource efficiency, we identify opportunities for backup resource sharing in a time-domain multiplexing manner. Two heuristic schemes are proposed, namely, Locally and Globally CW-Aware connection assignments. Our study on a sample optical mesh network shows that, by applying our SLA framework, 1) resource efficiency can be significantly improved, 2) CWs are effectively protected with high resilience (in terms of availability), 3) the availability of CWs can be increased almost linearly with used backup resources, and (4) our framework (approach) requires low operational complexity.

© 2011 OSA

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References

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  1. B. Mukherjee, Optical WDM Networks, Springer, 2006.
  2. S. Ramamurthy, L. Sahasrabuddhe, and B. Mukherjee, "Survivable WDM mesh networks," J. Lightwave Technol. 21, (4), 870‒883 (2003).
    [CrossRef]
  3. R. Clemente, M. Bartoli, M. Bossi, G. D’Orazio, and G. Cosmo, "Risk management in availability SLA," Proc. IEEE DRCN’05, 2005.
  4. MegaPath, "MegaPath Service Level Agreements," [Online]. Available: http://www.megapath.com/pdfs/service_level_assurances.pdf
  5. D. Greenwood, G. Vitaglione, L. Kelleral, and M. Calisti, "Service level agreement management with adaptive coordination," Proc. ICNS’06, 2006.
  6. R. Garg, H. Saran, R. Randhawa, and M. Singh, "A SLA framework for QoS provisioning and dynamic capacity allocation," Proc. IEEE IWQoS’02, 2002, pp. 129‒137.
  7. D. Xu, Y. Li, M. Chiang, and A. Calderbank, "Elastic service availability: utility framework and optimal provisioning," IEEE J. Sel. Areas Commun. 26, (6), 55‒65 (2008).
    [CrossRef]
  8. "Shinsei Bank Service and Maintenance Schedule," [Online]. Available:http://www.shinseibank.com/english/atm/guidance.html
  9. O. Gerstel and G. Sasaki, "Quality of protection (QoP): a quantitative unifying paradigm to protection service grades," Proc. OptiComm’01, 2001.
  10. P. Cholda, A. Mykkeltveit, B. Helvik, O. Wittner, and A. Jajszczyk, "A survey of resilience differentiation frameworks in communication networks," IEEE Commun. Surv. Tutorials 9, (4), 32‒55 (2007).
    [CrossRef]
  11. S. Ramamurthy and B. Mukherjee, "Survivable WDM mesh networks. Part II. Restoration," Proc. IEEE ICC’99, Vol. 3, 1999, pp. 2023‒2030.
  12. O. Gerstel and G. Sasaki, "Meeting SLAs by design: a protection scheme with memory," Proc. IEEE/OSA OFC, 2007, Anaheim, CA.
  13. S. Dong, C. Phillips, and R. Friskney, "Differentiated-resilience provisioning for the wavelength-routed optical network," J. Lightwave Technol. 24, (2), 667‒673 (2006).
    [CrossRef]
  14. S. Arakawa, J. Katou, and M. Murata, "Design method of logical topologies with quality of reliability in WDM networks," Photonic Network Commun. 5, (2), 107‒121 (2003).
    [CrossRef]
  15. G. Xue, L. Chen, and K. Thulasiraman, "Quality-of-service and quality-of-protection issues in preplanned recovery schemes using redundant trees," IEEE J. Sel. Areas Commun. 21, (8), 1332‒1345 (2003).
    [CrossRef]
  16. W. Fawaz, B. Daheb, O. Audouin, M. Du-Pond, and G. Pujolle, "Service level agreement and provisioning in optical networks," IEEE Commun. Mag. 42, (1), 36‒43 (2004).
    [CrossRef]
  17. A. Tzanakaki, G. Markidis, and K. Katrinis, "Supporting differentiated survivability services in WDM optical networks," Proc. IEEE ICTON’08, 2008, pp. 1‒4.
  18. A. Grue, W. Grover, M. Clouqueur, D. Schupke, B. Forst, and D. Onguetou, "Comparative study of fully pre-cross-connected protection architectures for transparent optical networks," Proc. IEEE DRCN’07, 2007, pp. 1‒8.
  19. S. Ramamurthy and B. Mukherjee, "Survivable WDM mesh networks. Part II. Restoration," Proc. IEEE ICC’99, Vol. 3, 1999, pp. 2023‒2030.
  20. M. Xia, M. Tornatore, C. Martel, and B. Mukherjee, "Service-centric provisioning in WDM backbone networks for the future Internet," J. Lightwave Technol. 27, (12), 1856‒1865 (2009).
    [CrossRef]
  21. C. Ou, J. Zhang, H. Zang, L. Sahasrabuddhe, and B. Mukherjee, "New and improved approaches for shared-path protection in WDM mesh networks," J. Lightwave Technol. 22, (5), 1223‒1232 (2004).
    [CrossRef]
  22. "Network availability in meshed transport networks," White Paper, Alcatel-Lucent Technology, 17 May 2007.
  23. P. Chołda, A. Mykkeltveit, B. E. Helvik, and A. Jajszczyk, "Continuity-based resilient communication," Proc. IEEE DRCN’09, 2009, pp. 335‒342.
  24. M. Xia, M. Tornatore, C. Martel, and B. Mukherjee, "Risk-aware routing for optical transport networks," Proc. IEEE INFOCOM’10, 2010.
  25. "Dynamic multi-terabit core optical networks: architecture, protocols, control and management (CORONET)," BAA06-29, DARPA, [Online]. Available: www.darpa.mil/STO/Solicitations/CORONET/index.htm.
  26. S. Sevilla, M. Xia, C. Martel, and B. Mukherjee, "Time-differentiated resilience in telecom mesh networks," Proc. IEEE ICC’11, 2011.

2009 (1)

2008 (1)

D. Xu, Y. Li, M. Chiang, and A. Calderbank, "Elastic service availability: utility framework and optimal provisioning," IEEE J. Sel. Areas Commun. 26, (6), 55‒65 (2008).
[CrossRef]

2007 (1)

P. Cholda, A. Mykkeltveit, B. Helvik, O. Wittner, and A. Jajszczyk, "A survey of resilience differentiation frameworks in communication networks," IEEE Commun. Surv. Tutorials 9, (4), 32‒55 (2007).
[CrossRef]

2006 (1)

2004 (2)

W. Fawaz, B. Daheb, O. Audouin, M. Du-Pond, and G. Pujolle, "Service level agreement and provisioning in optical networks," IEEE Commun. Mag. 42, (1), 36‒43 (2004).
[CrossRef]

C. Ou, J. Zhang, H. Zang, L. Sahasrabuddhe, and B. Mukherjee, "New and improved approaches for shared-path protection in WDM mesh networks," J. Lightwave Technol. 22, (5), 1223‒1232 (2004).
[CrossRef]

2003 (3)

S. Ramamurthy, L. Sahasrabuddhe, and B. Mukherjee, "Survivable WDM mesh networks," J. Lightwave Technol. 21, (4), 870‒883 (2003).
[CrossRef]

S. Arakawa, J. Katou, and M. Murata, "Design method of logical topologies with quality of reliability in WDM networks," Photonic Network Commun. 5, (2), 107‒121 (2003).
[CrossRef]

G. Xue, L. Chen, and K. Thulasiraman, "Quality-of-service and quality-of-protection issues in preplanned recovery schemes using redundant trees," IEEE J. Sel. Areas Commun. 21, (8), 1332‒1345 (2003).
[CrossRef]

Arakawa, S.

S. Arakawa, J. Katou, and M. Murata, "Design method of logical topologies with quality of reliability in WDM networks," Photonic Network Commun. 5, (2), 107‒121 (2003).
[CrossRef]

Audouin, O.

W. Fawaz, B. Daheb, O. Audouin, M. Du-Pond, and G. Pujolle, "Service level agreement and provisioning in optical networks," IEEE Commun. Mag. 42, (1), 36‒43 (2004).
[CrossRef]

Bartoli, M.

R. Clemente, M. Bartoli, M. Bossi, G. D’Orazio, and G. Cosmo, "Risk management in availability SLA," Proc. IEEE DRCN’05, 2005.

Bossi, M.

R. Clemente, M. Bartoli, M. Bossi, G. D’Orazio, and G. Cosmo, "Risk management in availability SLA," Proc. IEEE DRCN’05, 2005.

Calderbank, A.

D. Xu, Y. Li, M. Chiang, and A. Calderbank, "Elastic service availability: utility framework and optimal provisioning," IEEE J. Sel. Areas Commun. 26, (6), 55‒65 (2008).
[CrossRef]

Calisti, M.

D. Greenwood, G. Vitaglione, L. Kelleral, and M. Calisti, "Service level agreement management with adaptive coordination," Proc. ICNS’06, 2006.

Chen, L.

G. Xue, L. Chen, and K. Thulasiraman, "Quality-of-service and quality-of-protection issues in preplanned recovery schemes using redundant trees," IEEE J. Sel. Areas Commun. 21, (8), 1332‒1345 (2003).
[CrossRef]

Chiang, M.

D. Xu, Y. Li, M. Chiang, and A. Calderbank, "Elastic service availability: utility framework and optimal provisioning," IEEE J. Sel. Areas Commun. 26, (6), 55‒65 (2008).
[CrossRef]

Cholda, P.

P. Cholda, A. Mykkeltveit, B. Helvik, O. Wittner, and A. Jajszczyk, "A survey of resilience differentiation frameworks in communication networks," IEEE Commun. Surv. Tutorials 9, (4), 32‒55 (2007).
[CrossRef]

P. Chołda, A. Mykkeltveit, B. E. Helvik, and A. Jajszczyk, "Continuity-based resilient communication," Proc. IEEE DRCN’09, 2009, pp. 335‒342.

Clemente, R.

R. Clemente, M. Bartoli, M. Bossi, G. D’Orazio, and G. Cosmo, "Risk management in availability SLA," Proc. IEEE DRCN’05, 2005.

Clouqueur, M.

A. Grue, W. Grover, M. Clouqueur, D. Schupke, B. Forst, and D. Onguetou, "Comparative study of fully pre-cross-connected protection architectures for transparent optical networks," Proc. IEEE DRCN’07, 2007, pp. 1‒8.

Cosmo, G.

R. Clemente, M. Bartoli, M. Bossi, G. D’Orazio, and G. Cosmo, "Risk management in availability SLA," Proc. IEEE DRCN’05, 2005.

D’Orazio, G.

R. Clemente, M. Bartoli, M. Bossi, G. D’Orazio, and G. Cosmo, "Risk management in availability SLA," Proc. IEEE DRCN’05, 2005.

Daheb, B.

W. Fawaz, B. Daheb, O. Audouin, M. Du-Pond, and G. Pujolle, "Service level agreement and provisioning in optical networks," IEEE Commun. Mag. 42, (1), 36‒43 (2004).
[CrossRef]

Dong, S.

Du-Pond, M.

W. Fawaz, B. Daheb, O. Audouin, M. Du-Pond, and G. Pujolle, "Service level agreement and provisioning in optical networks," IEEE Commun. Mag. 42, (1), 36‒43 (2004).
[CrossRef]

Fawaz, W.

W. Fawaz, B. Daheb, O. Audouin, M. Du-Pond, and G. Pujolle, "Service level agreement and provisioning in optical networks," IEEE Commun. Mag. 42, (1), 36‒43 (2004).
[CrossRef]

Forst, B.

A. Grue, W. Grover, M. Clouqueur, D. Schupke, B. Forst, and D. Onguetou, "Comparative study of fully pre-cross-connected protection architectures for transparent optical networks," Proc. IEEE DRCN’07, 2007, pp. 1‒8.

Friskney, R.

Garg, R.

R. Garg, H. Saran, R. Randhawa, and M. Singh, "A SLA framework for QoS provisioning and dynamic capacity allocation," Proc. IEEE IWQoS’02, 2002, pp. 129‒137.

Gerstel, O.

O. Gerstel and G. Sasaki, "Quality of protection (QoP): a quantitative unifying paradigm to protection service grades," Proc. OptiComm’01, 2001.

O. Gerstel and G. Sasaki, "Meeting SLAs by design: a protection scheme with memory," Proc. IEEE/OSA OFC, 2007, Anaheim, CA.

Greenwood, D.

D. Greenwood, G. Vitaglione, L. Kelleral, and M. Calisti, "Service level agreement management with adaptive coordination," Proc. ICNS’06, 2006.

Grover, W.

A. Grue, W. Grover, M. Clouqueur, D. Schupke, B. Forst, and D. Onguetou, "Comparative study of fully pre-cross-connected protection architectures for transparent optical networks," Proc. IEEE DRCN’07, 2007, pp. 1‒8.

Grue, A.

A. Grue, W. Grover, M. Clouqueur, D. Schupke, B. Forst, and D. Onguetou, "Comparative study of fully pre-cross-connected protection architectures for transparent optical networks," Proc. IEEE DRCN’07, 2007, pp. 1‒8.

Helvik, B.

P. Cholda, A. Mykkeltveit, B. Helvik, O. Wittner, and A. Jajszczyk, "A survey of resilience differentiation frameworks in communication networks," IEEE Commun. Surv. Tutorials 9, (4), 32‒55 (2007).
[CrossRef]

Helvik, B. E.

P. Chołda, A. Mykkeltveit, B. E. Helvik, and A. Jajszczyk, "Continuity-based resilient communication," Proc. IEEE DRCN’09, 2009, pp. 335‒342.

Jajszczyk, A.

P. Cholda, A. Mykkeltveit, B. Helvik, O. Wittner, and A. Jajszczyk, "A survey of resilience differentiation frameworks in communication networks," IEEE Commun. Surv. Tutorials 9, (4), 32‒55 (2007).
[CrossRef]

P. Chołda, A. Mykkeltveit, B. E. Helvik, and A. Jajszczyk, "Continuity-based resilient communication," Proc. IEEE DRCN’09, 2009, pp. 335‒342.

Katou, J.

S. Arakawa, J. Katou, and M. Murata, "Design method of logical topologies with quality of reliability in WDM networks," Photonic Network Commun. 5, (2), 107‒121 (2003).
[CrossRef]

Katrinis, K.

A. Tzanakaki, G. Markidis, and K. Katrinis, "Supporting differentiated survivability services in WDM optical networks," Proc. IEEE ICTON’08, 2008, pp. 1‒4.

Kelleral, L.

D. Greenwood, G. Vitaglione, L. Kelleral, and M. Calisti, "Service level agreement management with adaptive coordination," Proc. ICNS’06, 2006.

Li, Y.

D. Xu, Y. Li, M. Chiang, and A. Calderbank, "Elastic service availability: utility framework and optimal provisioning," IEEE J. Sel. Areas Commun. 26, (6), 55‒65 (2008).
[CrossRef]

Markidis, G.

A. Tzanakaki, G. Markidis, and K. Katrinis, "Supporting differentiated survivability services in WDM optical networks," Proc. IEEE ICTON’08, 2008, pp. 1‒4.

Martel, C.

M. Xia, M. Tornatore, C. Martel, and B. Mukherjee, "Service-centric provisioning in WDM backbone networks for the future Internet," J. Lightwave Technol. 27, (12), 1856‒1865 (2009).
[CrossRef]

M. Xia, M. Tornatore, C. Martel, and B. Mukherjee, "Risk-aware routing for optical transport networks," Proc. IEEE INFOCOM’10, 2010.

S. Sevilla, M. Xia, C. Martel, and B. Mukherjee, "Time-differentiated resilience in telecom mesh networks," Proc. IEEE ICC’11, 2011.

Mukherjee, B.

M. Xia, M. Tornatore, C. Martel, and B. Mukherjee, "Service-centric provisioning in WDM backbone networks for the future Internet," J. Lightwave Technol. 27, (12), 1856‒1865 (2009).
[CrossRef]

C. Ou, J. Zhang, H. Zang, L. Sahasrabuddhe, and B. Mukherjee, "New and improved approaches for shared-path protection in WDM mesh networks," J. Lightwave Technol. 22, (5), 1223‒1232 (2004).
[CrossRef]

S. Ramamurthy, L. Sahasrabuddhe, and B. Mukherjee, "Survivable WDM mesh networks," J. Lightwave Technol. 21, (4), 870‒883 (2003).
[CrossRef]

S. Sevilla, M. Xia, C. Martel, and B. Mukherjee, "Time-differentiated resilience in telecom mesh networks," Proc. IEEE ICC’11, 2011.

M. Xia, M. Tornatore, C. Martel, and B. Mukherjee, "Risk-aware routing for optical transport networks," Proc. IEEE INFOCOM’10, 2010.

S. Ramamurthy and B. Mukherjee, "Survivable WDM mesh networks. Part II. Restoration," Proc. IEEE ICC’99, Vol. 3, 1999, pp. 2023‒2030.

S. Ramamurthy and B. Mukherjee, "Survivable WDM mesh networks. Part II. Restoration," Proc. IEEE ICC’99, Vol. 3, 1999, pp. 2023‒2030.

B. Mukherjee, Optical WDM Networks, Springer, 2006.

Murata, M.

S. Arakawa, J. Katou, and M. Murata, "Design method of logical topologies with quality of reliability in WDM networks," Photonic Network Commun. 5, (2), 107‒121 (2003).
[CrossRef]

Mykkeltveit, A.

P. Cholda, A. Mykkeltveit, B. Helvik, O. Wittner, and A. Jajszczyk, "A survey of resilience differentiation frameworks in communication networks," IEEE Commun. Surv. Tutorials 9, (4), 32‒55 (2007).
[CrossRef]

P. Chołda, A. Mykkeltveit, B. E. Helvik, and A. Jajszczyk, "Continuity-based resilient communication," Proc. IEEE DRCN’09, 2009, pp. 335‒342.

Onguetou, D.

A. Grue, W. Grover, M. Clouqueur, D. Schupke, B. Forst, and D. Onguetou, "Comparative study of fully pre-cross-connected protection architectures for transparent optical networks," Proc. IEEE DRCN’07, 2007, pp. 1‒8.

Ou, C.

Phillips, C.

Pujolle, G.

W. Fawaz, B. Daheb, O. Audouin, M. Du-Pond, and G. Pujolle, "Service level agreement and provisioning in optical networks," IEEE Commun. Mag. 42, (1), 36‒43 (2004).
[CrossRef]

Ramamurthy, S.

S. Ramamurthy, L. Sahasrabuddhe, and B. Mukherjee, "Survivable WDM mesh networks," J. Lightwave Technol. 21, (4), 870‒883 (2003).
[CrossRef]

S. Ramamurthy and B. Mukherjee, "Survivable WDM mesh networks. Part II. Restoration," Proc. IEEE ICC’99, Vol. 3, 1999, pp. 2023‒2030.

S. Ramamurthy and B. Mukherjee, "Survivable WDM mesh networks. Part II. Restoration," Proc. IEEE ICC’99, Vol. 3, 1999, pp. 2023‒2030.

Randhawa, R.

R. Garg, H. Saran, R. Randhawa, and M. Singh, "A SLA framework for QoS provisioning and dynamic capacity allocation," Proc. IEEE IWQoS’02, 2002, pp. 129‒137.

Sahasrabuddhe, L.

Saran, H.

R. Garg, H. Saran, R. Randhawa, and M. Singh, "A SLA framework for QoS provisioning and dynamic capacity allocation," Proc. IEEE IWQoS’02, 2002, pp. 129‒137.

Sasaki, G.

O. Gerstel and G. Sasaki, "Quality of protection (QoP): a quantitative unifying paradigm to protection service grades," Proc. OptiComm’01, 2001.

O. Gerstel and G. Sasaki, "Meeting SLAs by design: a protection scheme with memory," Proc. IEEE/OSA OFC, 2007, Anaheim, CA.

Schupke, D.

A. Grue, W. Grover, M. Clouqueur, D. Schupke, B. Forst, and D. Onguetou, "Comparative study of fully pre-cross-connected protection architectures for transparent optical networks," Proc. IEEE DRCN’07, 2007, pp. 1‒8.

Sevilla, S.

S. Sevilla, M. Xia, C. Martel, and B. Mukherjee, "Time-differentiated resilience in telecom mesh networks," Proc. IEEE ICC’11, 2011.

Singh, M.

R. Garg, H. Saran, R. Randhawa, and M. Singh, "A SLA framework for QoS provisioning and dynamic capacity allocation," Proc. IEEE IWQoS’02, 2002, pp. 129‒137.

Thulasiraman, K.

G. Xue, L. Chen, and K. Thulasiraman, "Quality-of-service and quality-of-protection issues in preplanned recovery schemes using redundant trees," IEEE J. Sel. Areas Commun. 21, (8), 1332‒1345 (2003).
[CrossRef]

Tornatore, M.

M. Xia, M. Tornatore, C. Martel, and B. Mukherjee, "Service-centric provisioning in WDM backbone networks for the future Internet," J. Lightwave Technol. 27, (12), 1856‒1865 (2009).
[CrossRef]

M. Xia, M. Tornatore, C. Martel, and B. Mukherjee, "Risk-aware routing for optical transport networks," Proc. IEEE INFOCOM’10, 2010.

Tzanakaki, A.

A. Tzanakaki, G. Markidis, and K. Katrinis, "Supporting differentiated survivability services in WDM optical networks," Proc. IEEE ICTON’08, 2008, pp. 1‒4.

Vitaglione, G.

D. Greenwood, G. Vitaglione, L. Kelleral, and M. Calisti, "Service level agreement management with adaptive coordination," Proc. ICNS’06, 2006.

Wittner, O.

P. Cholda, A. Mykkeltveit, B. Helvik, O. Wittner, and A. Jajszczyk, "A survey of resilience differentiation frameworks in communication networks," IEEE Commun. Surv. Tutorials 9, (4), 32‒55 (2007).
[CrossRef]

Xia, M.

M. Xia, M. Tornatore, C. Martel, and B. Mukherjee, "Service-centric provisioning in WDM backbone networks for the future Internet," J. Lightwave Technol. 27, (12), 1856‒1865 (2009).
[CrossRef]

S. Sevilla, M. Xia, C. Martel, and B. Mukherjee, "Time-differentiated resilience in telecom mesh networks," Proc. IEEE ICC’11, 2011.

M. Xia, M. Tornatore, C. Martel, and B. Mukherjee, "Risk-aware routing for optical transport networks," Proc. IEEE INFOCOM’10, 2010.

Xu, D.

D. Xu, Y. Li, M. Chiang, and A. Calderbank, "Elastic service availability: utility framework and optimal provisioning," IEEE J. Sel. Areas Commun. 26, (6), 55‒65 (2008).
[CrossRef]

Xue, G.

G. Xue, L. Chen, and K. Thulasiraman, "Quality-of-service and quality-of-protection issues in preplanned recovery schemes using redundant trees," IEEE J. Sel. Areas Commun. 21, (8), 1332‒1345 (2003).
[CrossRef]

Zang, H.

Zhang, J.

IEEE Commun. Mag. (1)

W. Fawaz, B. Daheb, O. Audouin, M. Du-Pond, and G. Pujolle, "Service level agreement and provisioning in optical networks," IEEE Commun. Mag. 42, (1), 36‒43 (2004).
[CrossRef]

IEEE Commun. Surv. Tutorials (1)

P. Cholda, A. Mykkeltveit, B. Helvik, O. Wittner, and A. Jajszczyk, "A survey of resilience differentiation frameworks in communication networks," IEEE Commun. Surv. Tutorials 9, (4), 32‒55 (2007).
[CrossRef]

IEEE J. Sel. Areas Commun. (2)

D. Xu, Y. Li, M. Chiang, and A. Calderbank, "Elastic service availability: utility framework and optimal provisioning," IEEE J. Sel. Areas Commun. 26, (6), 55‒65 (2008).
[CrossRef]

G. Xue, L. Chen, and K. Thulasiraman, "Quality-of-service and quality-of-protection issues in preplanned recovery schemes using redundant trees," IEEE J. Sel. Areas Commun. 21, (8), 1332‒1345 (2003).
[CrossRef]

J. Lightwave Technol. (4)

Photonic Network Commun. (1)

S. Arakawa, J. Katou, and M. Murata, "Design method of logical topologies with quality of reliability in WDM networks," Photonic Network Commun. 5, (2), 107‒121 (2003).
[CrossRef]

Other (17)

"Shinsei Bank Service and Maintenance Schedule," [Online]. Available:http://www.shinseibank.com/english/atm/guidance.html

O. Gerstel and G. Sasaki, "Quality of protection (QoP): a quantitative unifying paradigm to protection service grades," Proc. OptiComm’01, 2001.

S. Ramamurthy and B. Mukherjee, "Survivable WDM mesh networks. Part II. Restoration," Proc. IEEE ICC’99, Vol. 3, 1999, pp. 2023‒2030.

O. Gerstel and G. Sasaki, "Meeting SLAs by design: a protection scheme with memory," Proc. IEEE/OSA OFC, 2007, Anaheim, CA.

R. Clemente, M. Bartoli, M. Bossi, G. D’Orazio, and G. Cosmo, "Risk management in availability SLA," Proc. IEEE DRCN’05, 2005.

MegaPath, "MegaPath Service Level Agreements," [Online]. Available: http://www.megapath.com/pdfs/service_level_assurances.pdf

D. Greenwood, G. Vitaglione, L. Kelleral, and M. Calisti, "Service level agreement management with adaptive coordination," Proc. ICNS’06, 2006.

R. Garg, H. Saran, R. Randhawa, and M. Singh, "A SLA framework for QoS provisioning and dynamic capacity allocation," Proc. IEEE IWQoS’02, 2002, pp. 129‒137.

A. Tzanakaki, G. Markidis, and K. Katrinis, "Supporting differentiated survivability services in WDM optical networks," Proc. IEEE ICTON’08, 2008, pp. 1‒4.

A. Grue, W. Grover, M. Clouqueur, D. Schupke, B. Forst, and D. Onguetou, "Comparative study of fully pre-cross-connected protection architectures for transparent optical networks," Proc. IEEE DRCN’07, 2007, pp. 1‒8.

S. Ramamurthy and B. Mukherjee, "Survivable WDM mesh networks. Part II. Restoration," Proc. IEEE ICC’99, Vol. 3, 1999, pp. 2023‒2030.

"Network availability in meshed transport networks," White Paper, Alcatel-Lucent Technology, 17 May 2007.

P. Chołda, A. Mykkeltveit, B. E. Helvik, and A. Jajszczyk, "Continuity-based resilient communication," Proc. IEEE DRCN’09, 2009, pp. 335‒342.

M. Xia, M. Tornatore, C. Martel, and B. Mukherjee, "Risk-aware routing for optical transport networks," Proc. IEEE INFOCOM’10, 2010.

"Dynamic multi-terabit core optical networks: architecture, protocols, control and management (CORONET)," BAA06-29, DARPA, [Online]. Available: www.darpa.mil/STO/Solicitations/CORONET/index.htm.

S. Sevilla, M. Xia, C. Martel, and B. Mukherjee, "Time-differentiated resilience in telecom mesh networks," Proc. IEEE ICC’11, 2011.

B. Mukherjee, Optical WDM Networks, Springer, 2006.

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Figures (13)

Fig. 1
Fig. 1

(Color online) Pre-cross-connected protection with backup sharing.

Fig. 2
Fig. 2

(Color online) Illustrative connection assignment.

Fig. 3
Fig. 3

(Color online) Illustrative backup resource sharing.

Fig. 4
Fig. 4

(Color online) Flowchart of Globally CW-aware connection assignment.

Fig. 5
Fig. 5

(Color online) Resource sharing efficiency under different link loads.

Fig. 6
Fig. 6

(Color online) Resource sharing efficiency under different CW lengths.

Fig. 7
Fig. 7

(Color online) Resource sharing efficiency under different numbers of link-disjoint paths.

Fig. 8
Fig. 8

(Color online) Availability level for critical windows and overall period using different amounts of backup resources.

Fig. 9
Fig. 9

(Color online) A sample mesh network with fiber lengths (in km) marked on each link.

Fig. 10
Fig. 10

(Color online) Portion of node pairs with k link-disjoint paths.

Fig. 11
Fig. 11

(Color online) Network load versus resource sharing efficiency.

Fig. 12
Fig. 12

(Color online) Distribution of availability levels.

Fig. 13
Fig. 13

(Color online) Traffic pattern versus resource sharing efficiency.

Tables (3)

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Table I Metrics for Resilience and Typical Values

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Table II Category of Related Works

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Table III A Sample Service Level (in Terms of Resilience) Under Structural Differentiation Protection

Equations (11)

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1 500 × 1 0 3 24 × 3600 = 0 . 999994 .
1 500 × 1 0 3 3600 = 0 . 99986 ,
C = ( s , d , h , b , S C W , R B , R C W ) ,
{ R } { , } ,
B C W = 0 .
b i , j = b , j  is in a CW, 0 , otherwise.
B k , j = i on path k b i , j .
B k = max j { B k , j } .
(a)  b m , j = 0 , b n , j = 0 ; (b)  b m , j = 0 , b n , j = b ; (c)  b m , j = b , b n , j = 0 ; (d)  b m , j = b , b n , j = b .
S I i , p = j ( B k B k , j ) × E M P i , p ( j ) .
Availability Level = log 10 ( 1 Availability ) .