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Title: Free-space multiwavelength optical switching core for MPLS-based storage area networks
Author: Chou, H.-H.
Awarding Body: University of Cambridge
Current Institution: University of Cambridge
Date of Award: 2008
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From the literature review of promising networking architectures, a MPLS-enabled networking architecture was selected for SAN applications over an optical network and the SAN data transmission protocol over such network architecture was simulated through a simulation platform constructed by Network Simulator (NS-2) software. The strategies in designing a MPLS-enabled router prototype were specified from the case study of currently commercial available SAN switches/routers. The architecture design of a MPLS-enabled router prototype was emulated by using OPNET Modeler. The network-wide simulation results from NS-2 showed that the utilization of iSCSI transmission protocol with appropriate setting of TCP parameters such as window size can increase the network throughput and the link bandwidth efficiency for SAN applications. A realistic system-level performance simulation of the proposed router prototype by OPNET Modeler software indicated that the labelled packet size of 1500 byte length under the proposed switching architecture with the SLM reconfiguration time of 1us is suitable to minimise the buffer size usage and maintain an acceptable switching latency less than 20ms no matter when the SANs traffic is intensive or not. The optical transmission performance of the implemented 2x2 shutter-based free-space multiwavelength optical switch prototype evaluated by CWDM transceiver based testbed has proved successfully that a link budget between -26.72dB and -28.88 dB can be achieved with a satisfying BER of less than 10-12 in a single mode fibre to multimode fibre transmission architecture. From the analysis of optical components, the optical system link budget can be improved up to 4.3dB. The system crosstalk of the optical switching prototype was calculated to be between -21.6dB and -24.4dB.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available