TDD-Based Rapid Fault Detection and Recovery for Fronthaul Bridged Network

Fronthaul bridged network has been a hot research topic in recent years. A challenge for existing path-control protocols for bridged networks is that the route computation is executed after the advertisement of the link fault based on the updated link state information. To address this issue, this letter proposes a novel fault detection and recovery scheme for fronthaul bridged networks. With the proposed scheme, bridges estimate the fault location utilizing the time-division duplex configuration of fronthaul streams and immediately switch the forwarding paths for the affected flows to backup paths. Consequently, the end-to-end communication of fronthaul streams is rapidly recovered compared with the existing protocols.