Multi-Layer Differentiated Integrated Survivability for Optical Internet |
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Authors: | Wei Wei Zeng Qingji Wang Yun |
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Affiliation: | (1) R&D Center for Broadband Optical Networking Technology, Shanghai Jiaotong University, Shanghai 200030, China |
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Abstract: | In this paper, we study the problem of multi-layer integrated survivability (MLIS) for efficiently provisioning reliable traffic connections of arbitrary bandwidth granularities in the integrated optical Internet. We decompose the MLIS problem into three sub-problems: survivable strategies design (SSD), spare capacity dimensioning (SCD), and dynamic survivable routing (DSR). First, a review of network survivability in multi-layer IP/WDM networks is provided. Then, multi-layer survivability strategies are proposed and it is observed how these strategies could be applied to the integrated optical Internet architecture. We also present an enhanced integrated shared pool (ISP) method for solving the static MLIS problem (i.e., the SCD sub-problem) and the priority-based integer programming formulations are also given. Moreover, we design a novel scheme called the differentiated integrated survivability algorithm (DISA) to solve the dynamic MLIS problem (i.e., the DSR sub-problem), which employs flexible survivable routing strategies according to the priority of the traffic resilience request. Performance simulation results of DISA show that our adaptive survival schemes perform much better in terms of traffic blocking ratio, spare resource requirement, and average traffic recovery ratio compared with other solutions in the optical Internet. |
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Keywords: | optical Internet generalized multi-protocol label switching multi-layer integrated survivability survivable strategies design spare capacity dimensioning dynamic survivable routing integrated shared pool differentiated integrated survivable algorithm |
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