The multicast capability of a multicast-capable optical add/drop multiplexer (MC-OADM) is analyzed and the dynamic network performance on the WDM ring employing such MC-OADMs is investigated. The MC-OADM multicast scheme can provide more multicast services while consume less resources in comparison with that of the normal OADM ring without multicast capability.
We analyze the multicast capability of a multicast-capable optical add/drop multiplexer (MC-OADM) and investigate the dynamic network performance of the MC-OADM ring in comparison with that of the normal OADM ring without multicast capability. The simulation results show that the multicast scheme using MC-OADMs provides more multicast services and occupies fewer resources.
In the physical topology design, the number of OXCs and/or links is takes as the objective. In this paper, we take aim at minimizing the maximal optical port number of each OXC, given the number of OXCs and the traffic. We present a traffic-oriented heuristic algorithm to generate an initial topology. This presented algorithm outperforms the previous algorithm, since our presented algorithm takes into account the traffic pattern. Furthermore, we present a routing strategy that is a balance between the shortest-path routing and the least-congestion routing. The tabu algorithm is adopted to attain the optimal solution. We choose the path-based sharing protection scheme to provide 100% recovery guarantee. Numerical results demonstrate the effectiveness of our algorithm and strategy.
We studied the conformance test cases development and abstract test suite (ATS) generation methods, and we considered the External Network-Network Interface (E-NNI) signaling protocols for Automatic Switched Optical Networks (ASON). Then we developed the conformance test suite using TTCN-3 (Testing and Test Control Notation version 3) language. These codes are used to test the E-NNI interface between kinds of devices, which are developed by multiple vendors.
Metastable CoCu thin films are deposited by rf magneto- sputtering. The relationship between magnetoresistance of CoCu granular films and vacuum annealing temperature, applied magnetic field, composition of alloy thin film are studied. FCC structure Co second phase are precipitated after annealing. Giant magnetoresistance effect is observed in the nonmagnetic Cu matrix, its magnitude depends on the quantity and size of Co particles. The structure of CoCu granular alloy films is investigated by x-ray and TEM method.
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