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This paper takes a closer look at the shared risk link group (SRLG) optimization issue and proposes algorithm on how to reduce the size of the SRLGs for different applications with correctness proofs.
Shared risk link groups (SRLGs) have been defined and implemented in many network planning tools and routing protocols. A single SRLG represents one potential failure, and a large service provider's network could easily contain tens of thousands of potential failures. The greater the number of SRLGs, the more difficult it is to attain good performance from planning tools (like routers) whose computations...
Network planners are often requested to provision multiple physically-diverse high-speed circuits over a large carrier's core (inter-city) DWDM network, which consists of multiple layers and heterogeneous vendor systems. Optimally provisioning such circuits while avoiding shared risk link group (SRLG) failures is an NP-hard problem. In this paper, we propose a novel hybrid two-step approach: pre-processing...
currently, there is no existing solution or tool to efficiently route a high-speed circuit over heterogeneous DWDM networks under multi-vendor environment, although each vendor may provide a planning tool to route a circuit within its own sub-network domain. This is mainly due to the lack of common technology for optical reachability calculation across vendor sub-networks. Each sub-network has its...
We design a cost efficient routing algorithm and prototype a network planning tool to cost-effectively provision high-speed connections over a large carrier's heterogeneous core DWDM network with multi-vendor sub-networks.
Recent deployment of IP based multimedia distribution, especially broadcast TV distribution has increased the importance of simple and fast restoration during IP network failures for service providers. In this paper, we propose and evaluate a simple but efficient method for fast rerouting of IP multicast traffic during link failures in managed IPTV networks. More specifically, we devise an algorithm...
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