Implementation of multiple border routers for 6LoWPAN with ContikiOS

Routing Protocol for LLN (RPL) in 6LoWPAN support IP-layer routing for wireless sensor network (WSN). In current RPL, sensor nodes communicate with Internet through root LBR (LoWPAN border router), around where there is more serious imbalance on energy consumption and traffic load compared with other wireless nodes. With ContikiOS[1], we proposed and implemented a multiple border routers scheme, including router selection algorithm based on the minimum value of rank evaluated by RPL, and transparent Multiple-LBR routing in Internet. Without adding extra signaling, Multiple LBRs support is increased in the existing 6LoWPAN. Under our scheme, the proposed 6LoWPAN is implemented on physical platform at last and ten-node WSN with two border routers does a good job. With our scheme, 6LoWPAN nodes can choose the border routers freely, and connect with the Internet seamlessly.