Information dissemination performance of a disaster-tolerant NDN-based distributed application in disrupted cellular networks

During a disaster, it is important to exchange information such as the magnitude of the disaster and safety confirmation. However, the communication infrastructure, such as a mobile phone network, may not be available after a large-scale disaster because current communication infrastructures have centralized control structures. Thus, it is important to design a network that can maintain a normal service using the remaining network resources, such as base stations and user terminals, even if the central servers are no longer available because of disconnections among servers. In this study, we developed a distributed SNS service, or autonomous distributed network, based on named data networking (NDN) with two-tier hierarchical ID-based encryption (HIDE) for authentication. We conducted a simulation of a residential area in the suburbs of Tokyo to demonstrate the performance of this SNS application, where it was used to disseminate safety confirmation. We present the average message delivery time with different decision intervals, the synchronization intervals, and the ratios of moving people.