Wired and wireless network cooperation for quick recovery

This paper proposes a wired and wireless network cooperation (NeCo) system to quickly recover civilian telecommunication services in the aftermath of a catastrophic disaster. The proposed NeCo system achieves both rapid recovery and high throughput using wireless bypass routes backhauled by wired networks. With the NeCo system, active leaf nodes relay packets to and from dead leaf nodes whose wired communication channels have been disrupted. Thus, the dead leaf nodes can recover communication with root nodes outside the disaster area. In the this study, optimal bypass routes are computed to maximize the expected wireless throughput by solving a linear programming problem. Another issue is to overcome the limitation that the distribution of leaf nodes is determined by the demand distribution. We also introduce deploying additional recovery nodes to expand the application range of the NeCo system. Numerical simulations showed that the proposed NeCo achieved a higher throughput than an existing method, irrespective of the wired network's topology, and that our NeCo is suitable in cases where leaf nodes are widely distributed around a disaster area.