Performance Comparison of OLSR and BATMAN in IoT-Blockchain Network <Abstract> Using ad hoc routing protocols in the IoT-Blockchain network can avoid the single point of failure problem when deploying IoT over the infrastructure-based networks, such as Wi-Fi or LTE. This paper investigates the performance of two ad hoc routing protocols (i.e., Optimized Link State Routing (OLSR) and Better Approach To Mobile Ad-hoc Network (BATMAN)) in an IoT-Blockchain system. We have deployed the two protocols in an emulated IoT environment using mininet-wifi and a private Ethereum blockchain. We ?rst compared the network performance of OLSR and BATMAN with the throughput and Round Trip Time (RTT) metrics. The results show that OLSR behaves better than BATMAN in our network. Second, we evaluated the recovery time after a failure happened in the network with and without a blockchain connection. The evaluation results indicate that BATMAN outperforms OLSR in routing recovery and blockchain connection recovery from the failure. More specifically, BATMAN's routing recovery time is 8.485, 7.355 seconds faster than OLSR when not having, and having a blockchain connection, respectively. |