Opportunistic Routing for Heterogeneous IoT Networks

IoT networks under IoT gateways generally composed of terminals with multiple communication technologies and required to utilize IoT gateways for mutual communications among terminals. However, deploying bunch of IoT gateways for gaining connectivity is costly, thus SSGW (Solution Specific Gateways), which can only convert specific technologies, is introduced to reduce the cost maintaining the connectivity. Although the routing protocols for IoT network with SSGW using specific fixed routes has been proposed, there still be a room for improvement in an adaptive routing according to network environments. This research tackles the issue with Opportunistic Routing SSGW using ETX as forwarding decision metric. The simulations clarify, the effectiveness of the proposed routing protocol from the viewpoint of load balancing and delay.