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Current frameworks for network programming assume that the network contains a collection of homogenous devices that can be rapidly reconfigured in response to changing policies and network conditions. Unfortunately, these assumptions are incompatible with the realities of modern networks, which contain legacy devices that offer diverse functionality and can only be reconfigured slowly. Additionally,...
Orchestration across multiple domains is important for providing end-to-end services in software defined infrastructures. In this paper, we address the service function chain (SFC) mapping problem in a multi-domain network with nodes having different functions, i.e., service functions and/or switch functions. We present two different abstractions of the topology graph at the distributed orchestrators...
The massive adoption of cloud-based services in data center lead to an exponential increasing in both the amount traffic and servers, which brings a great challenge to data center network (DCN). In this paper, MOSA: a modular all-optical switching architecture based on arrayed waveguide gratings (AWG) is proposed to address the issue. The modular design makes MOSA can expand up to millions of servers...
In this paper, we study a new optical network paradigm, where statistical sharing is supported in optical networks. This new paradigm is motivated by the recent revolution of Software Defined Optics (SDO). Software defined variable-bandwidth transponders can support variable data rates for a single connection, i.e. base rates and peak rates. Guaranteeing the peak rates for all the connections simultaneously...
We propose transceiver sharing schemes at ROADM nodes for shared restoration in flexible grid optical networks in order to improve the utilization of transceivers for backup paths. The flexible ROADM architecture with a pool of transceivers achieves the highest utilization.
In this paper, we address the problem of survivable traffic grooming and regenerator placement in optical WDM networks with impairment constraints. The working connections are protected end to end by provisioning bandwidth along a sequence of lightpaths through a dedicated connection-level protection scheme. An auxiliary-graph-based approach is proposed to address the placement of regenerators and...
We consider survivable traffic grooming through dedicated lightpath protection in a network with impairment constraints. Results evaluate the dependency of network equipment placement on survivable lightpath provisioning in terms of the network cost.
We consider traffic grooming and regenerator placement in an optical network in which lightpaths are hop-constrained by impairments. Combining grooming with regenerator placement reduces costs compared to addressing traffic grooming and regenerator placement separately.
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