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Reconfigurable Optical Add/Drop Multiplexers (ROADMs) are optical modules capable of adding/dropping or passing through any or all wavelengths present in DWDM signal with remote management capability. In performance of ROADMs, routing power ‘R’ which is a figure of merit has been used. The wavelength routing performance of ROADMs has been improved by inclusion of dynamic traffic under different traffic...
Large parallel applications become sensitive to communication latencies, suggesting the need for low-latency networks in high-performance computer systems. Switch delay dominates network latencies, especially for a large number of small transfer data. To reduce the network latencies, we exploit routing cache on a switch. Routing decision based on off-chip CAM(Content Addressable Memory)-based table...
Cross-layer quality-of-service-aware packet multicasting is investigated for optical packet-switching network fabrics. We present both a numerical simulation exploration of the cross-layer routing algorithms and an experimental demonstration on an optical switching test-bed with 10×10-Gb/s wavelength-striped packets.
A new architecture for broadband multicasting of optical messages is proposed and demonstrated on a programmable optical packet switching test-bed. Optical packets with wavelength-striped 8 ?? 10 Gb/s payloads are successfully multicasted and routed error-free.
We analyze the performance of a multiple-ROADM-ring connected network that utilizes Hierarchical Optical Cross-Connects (HOXC). We clarify the impacts of the waveband capacity and waveband add/drop ratio at the HOXC node on the node performance and switch scale.
Photonic networks-on-chip have emerged as a viable solution for interconnecting multicore computer architectures in a power-efficient manner. Current architectures focus on large messages, however, which are not compatible with the coherence traffic found on chip multiprocessor networks. In this paper, we introduce a reconfigurable optical interconnect in which the topology is adapted automatically...
This paper introduces plural test bed configurations of a CWDM (coarse wavelength division multiplexing) local network. The latest test bed structure allows local people to broadcast high definition video any time they want to.The local access network such as FTTH (fiber to the home) has a point to multi-point network structure. As a trial The test bed network has a Multi-point to multi-point structure...
In this paper, we investigated designing multicast-capable optical cross-connects (MC-OXCs) on a basis of the 4- stage multicast network. Firstly, we derive the sufficient wide- sense nonblocking (WSNB) and rearrangeable nonblocking (RNB) conditions for the 4-stage multicast network with only two (the second and output) stages being multicast-capable. Both WSNB and RNB 4-stage multicast networks need...
Todaypsilas access network is migrating towards broadband IP, fixed/mobile convergence and service convergence. Thus, the next generation access network (NGAN) requires a converged optical/wireless access network infrastructure, other than the existing architecture that connect to the cellular, broadband wireless, and optical access networks separately, which complicate the network and increase the...
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