Link Failure Tolerance by Path Restoration
Due to channel interference, dynamic obstacles and/or applications' bandwidth demands multi-hop Wireless Mesh Networks (WMNs) experience frequent link failures. This results performance degradation in WMNs and require expensive, manual network management for their real-time recovery. Herewith the authors present an Autonomous network Reconfiguration System (ARS) that enables a multi-radio WMN to automatically recover from local link failures to improve network performance. By using bully algorithm, ARS generates necessary changes in local radio and channel assignments in order to recover from failures. Based on the thus-generated configuration changes, the system cooperatively reconfigures network settings among local mesh routers. Based WMN test-bed and through ns-2-based simulation ARS has been implemented and evaluated extensively.