Geo-Logical Routing in Wireless Sensor Networks
Geo-Logical Routing (GLR) is a novel technique that combines the advantages of geographic and logical routing to achieve higher routability at a lower cost. It uses topology domain coordinates, derived solely from Virtual Coordinates (VCs), as a better alternative for physical location information. In logical domain, a node is characterized by a VC vector consisting of minimum number of hops to a set of anchors. VCs contain information derived from connectivity of the network, but lack physical layout information such as directionality and geographic voids. Disadvantages of geographic routing, which relies on physical location information, include cost of node localization or/and use of GPS, as well as misrouting due to physical voids.