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IEEE/ICACT20260346 Slide.15
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A single recovery strategy is usually unable to satisfy both speed and connectivity under multi-node failures, so UW-LFRR uses a two-stage design. Phase I prioritizes quickly returning traffic to the original shortest-path backbone whenever possible, and Phase II is invoked only when the backbone is locally cut and connectivity must be preserved through a constrained search inside the affected region. This follows a safety-first, fallback-as-needed philosophy. | |
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