Radio-Disjoint Geographic Multipath Routing for Reliable Data Transfer in Lossy WSNs

In order to find a completely disjointed multiple routes, traditional multipath strategies try to get global topology information by using frequent flooding or end-to-end signaling. It is very useful, but too much expensive to directly adapt to the resource constrained wireless sensor networks. Thus, recently there has been proposed an energy-efficient localized multipath scheme (EDM), which exploits geographic information for multipath discovery and routing. However, EDM has a significant limitation that it does not consider the case of simultaneous transmission between adjacent paths. Because of the path interferences, the transmission fails or corrupted packet receptions might be frequently occurred even if EDM has made completely disjointed multiple paths. Therefore we propose an interference-free geographic multipath protocol by allowing the paths to separate each other. To implement that, we utilize a logical multipath pipeline approach. Each pipeline has to keep a certain distance between each other, and a route can be allowed to be made within a pipeline.