Presentation Information
[B-7-08]Evaluating Communication Network Robustness Against Utility Pole Failures Caused by Heavy Rainfall-Induced Landslides
◎Ren Yamamoto1, Akira Ito2, Katsuya Hayashi2, Takeru Inoue1 (1. University of Yamanashi, 2. NTT Access Network Service Systems Laboratories)
Keywords:
Communication Network Robustness
This study proposes a method for evaluating the robustness of the communication network in Yamanashi Prefecture against utility pole failures caused by heavy rainfall-induced landslides. A base topology generated from real data was combined with a pole-collapse model and modeled as a graph with 4,756 nodes and 4,760 links. Since algorithms handling node failures cannot scale to such large networks, the graph-reduction techniques used for link-failure models were adapted for node failures, reducing each building pair to at most 13 nodes to enable evaluation. The results quantitatively show that high connection reliability is maintained in the flat northwestern and central areas, whereas reliability drops in the eastern and southwestern areas where high-risk poles in mountainous terrain are traversed.