Latency Assessment of IoT-Blockchain System based
on Mobile Ad-hoc Network <Abstract> Combining IoT and blockchain technologies has gained more attraction in recent years since the two can fulfill each other. The existing IoT-Blockchain systems are generally deployed on infrastructure-based networks (e.g., Wi-Fi, LTE) with the Single Point of Failure problem (SPoF). The problem indicates the control node, such as a base station or an access point, collapses, and the systems' IoT devices can no longer communicate. In the previous work, we show that using a mobile ad-hoc network (MANET) as the underlying network for IoTBlockchain can avoid the risk of SPoF. However, we have only considered the simple mobility scenario (i.e., one-node movement). In this paper, we aim to assess the network performance of the IoT-Blockchain system with Ethereum and MANET at a higher mobility level. More specifically, we evaluate two blockchain latency metrics: Transaction-Oriented Latency (TOL) and Block-Oriented Latency (BOL) in a MANET in which a large number of nodes continuously move. The results indicate that the Ethereum blockchain keeps operations on the MANET with high mobility. We can evaluate and get the values of TOL and BOL, which are reasonable for blockchain operation. Compared to static scenarios, the TOL and BOL become larger and more volatile due to the mobility's impact. |