This paper first envisions the advent of the directional wireless mesh networks with multiple radios and directional antennas in the coming years. Then, based on the observation that simplicity induces efficiency and scalability, the paper proposes a combined geometric deployment and routing strategy for such mesh networks, and also gives a concrete approach under this strategy. The main idea o...

Two main problems prevent the deployment of geographic forwarding in real systems: geographic forwarding requires that all nodes know their locations, and it has trouble routing around local dead ends. This paper presents practical solutions to each problem. The location proxy technique allows a node that does not know its location to find a nearby location aware node to use as a proxy for geog...

The wireless link can be unreliable in realistic wireless sensor networks (WSNs). Energy efficient and reliable data forwarding is important because each node has limited resources. Therefore, we must suggest an optimal solution that considers using the information of the node’s characteristic A wireless sensor network is composed of a large number of low-cost devices distributed over a geograp...

The main goal of this paper is to provide routing– table-free online algorithms for wireless sensor networks (WSNs) to select cost (e.g., node residual energies) and delay efficient paths. As basic information to drive the routing process, both node costs and hop count distances are considered. Particular emphasis is given to greedy routing schemes, due to their suitability for resource constra...

A wireless sensor network needs a suitable multihop routing protocol to facilitate the communication between arbitrary sensor nodes. Position-based routing protocols are attractive for large-scale sensor networks due to their location awareness and scalability. A large number of position-based routing protocols use the greedy forwarding strategy. This paper presents an efficient implementation ...

Geographic information systems (GIS) are increasingly using geospatial data from the Web to produce geographic information. One big challenge is to find the relevant data, which often is based on keywords or even file names. However, these approaches lack semantics. Thus, it is necessary to provide mechanisms to prepare data to help retrieval of semantically relevant data. This work proposes an...