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Abstract

This article introduces fractional lambda (λ) switching (FλS) and studies its blocking issues. FλS uses a global common time reference (CTR) for implementing pipeline forwarding (PF) inside the network. A global CTR is conveniently realized with the UTC (coordinated universal time) standard. Resource reservation over an FλS network requires a schedule. As in other scheduling cases, a call may not be accepted, even though there is enough capacity, because the schedule is not available—the call is then considered blocked. This work studies the probability of call blocking as a function of link utilization. The results show that (especially if multiple-wavelength division multiplexing channels are deployed on optical links between fractional λ switches) high-link utilization can be achieved with negligible call blocking, even when the switching fabric is a Banyan network.

Keywords

Fractional lambda switching common time reference pipeline forwarding optical networks Banyan networks

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References

Baldi, M. , and Y. Ofek . 2000. End-to-end delay of videoconferencing over packet switched networks . IEEE/ACM Transactions on Networking 8 (4): 479-492 .

Baldi, M. , and Y. Ofek . 2003. Realizing dynamic optical networking . Optical Networks Magazine, 4(5): 100-111 .

Li, C.-S. , Y. Ofek , A. Segall , and K. Sohraby . 1994. Pseudo-isochronous cell switching in ATM networks . In IEEE INFOCOM’94, pp. 428-437 .

Li, C.-S. , Y. Ofek , A. Segall , and K. Sohraby . 1998. Pseudo-isochronous cell forwarding . Computer Networks and ISDN Systems 30: 2359-2372 .

Baldi, M. , Y. Ofek , and B. Yener . 2000. Adaptive group multicast with time-driven priority . IEEE/ACM Transactions on Networking 8 (1): 31-43 .

Ofek, Y. , and M. Faiman . 1987. Distributed global event synchronization in a fiber optic hypergraph network . Paper presented at the 7th International Conference on Distributed Computing Systems, September, Berlin.

Ofek, Y. 1987. The topology, algorithms and analysis of a synchronous optical hypergraph architecture. Rep. No. UIUCDCS-R-87-1343. Ph.D. diss., Electrical Engineering Department, University of Illinois at Urbana.

Hunter, D. K. , and D. G. Smith . 1993. New architectures for optical TDM switching . IEEE/OSA Journal of Lightwave Technology 11 (3): 495-511 .

Kaminow, I. P. , C. R. Doerr , C. Dragone , T. Koch , U. Koren , A. A. M. Saleh , et al. 1996. A wideband all-optical WDM network . IEEE Journal on Selected Areas in Communications 14 (5): 780-799 .

10.

Gambini, P. , Monique Renaud , Christian Guillemot , Franco Callegati , Ivan Andonovic , Bruno Bostica , et al. 1998. Transparent optical packet switching: Network architecture and demonstrators in the KEOPS project . IEEE Journal on Selected Areas in Communications 16 (7): 1245-1257 .

11.

Huang, Nen-Fu , Guan-Hsiung Liaw , and Chuan-Pwu Wang . 2000. A novel all-optical transport network with time-shared wavelength channels . IEEE Journal on Selected Areas in Communications 18 (10): 1863-1875 .

12.

Jordan, H. F. , D. Lee , K. Y. Lee , and S. V. Ramanan . 1994. Serial array time slot interchangers and optical implementations . IEEE Transactions on Computers 43 (11): 1309-1318 .

13.

Srinivasan, R. , and Arun K. Somani . 2002. A generalized framework for analyzing time-space switched optical networks . IEEE Journal on Selected Areas in Communications 20 (1): 202-215 .

14.

Subramaniam, Suresh , Eric J. Harder , and Hyeong-Ah Choi . 2000. Scheduling multirate sessions in time division multiplexed wavelength-routing networks . IEEE Journal on Selected Areas in Communications 18 (10): 2105-2110 .

15.

Wen, Bo , and Krishna M. Sivalingam . 2002. Routing, wavelength and time-slot assignment in time division multiplexed wavelength-routed optical WDM networks . In IEEE INFOCOM 2002.

16.

Ofek, Y. 1994. Generating a fault tolerant global clock using high-speed control signals for the Meta Net architecture. In IEEE Transactions on Communications, May.

17.

Goke, L. R. , and G. J. Lipovski . 1973. Banyan networks for partitioning multiprocessor systems . In 1st Annual Symposium on Computer Architecture, pp. 21-28 .

Fractional Lambda Switching Principles of Operation and Performance Issues

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