Towards a Cost Effective and Survivable Wide-area Topology of Telecommunication Cabling

Project: Research

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In this project, we aim to optimize network topology over a wide area at considering cabling cost and network survival probability (the probability that all network nodes are still connected following a disaster). Both greenfield and brownfield scenarios are considered. A joint probability function over a sphere (that models the surface of the earth) of the location of a disaster (normally earthquake) and its effect is used to derive the network survival probability. This probability function should be consistent with known earthquake engineering data and also sufficiently simple to lead to a closed-form expression for the network survival probability. The survivability requirement leads to conflicting demands: cables should be laid away from each other to avoid mutual breakage, yet not too far away from each other that their lengths, and hence their cost, becomes excessive. This is an interesting and challenging geometric optimisation problem on the sphere. While we ultimately aim to solve this problem for multiple nodes, we note that even the two-node scenario is far from trivial and has immediate practical applications. Monte Carlo simulations will be used to perform comprehensive simulation studies of realistic scenarios based on real seismic data and to validate the analytical model.


Project number7003017
Grant typeSG
Effective start/end date1/04/1319/06/14